Federal Taxation of Individuals
Individual Income Tax Formula
New Exam Assumption (2026): References to individual wages or compensation do not include overtime or tips unless otherwise stated. Under the One Big Beautiful Bill Act, up to $25,000 of tips may be deducted per year. Up to $12,500 of qualified overtime pay may be deducted for single filers, while married couples filing jointly can deduct up to $25,000.
Filing Requirements & Status
Who Must File & When
A return is required if gross income meets or exceeds the standard deduction (including age/blindness additions) or if self-employment income is $400+. The deadline is April 15th. A 6-month extension to file (not to pay) is available via Form 4868.
Filing Status Rules
| Status | Marital Requirement | Key Conditions / Dependents |
|---|---|---|
| Single | Unmarried or legally separated at year-end. | None. |
| Joint Returns (MFJ) | Married at year-end, common law, or spouse died during the year. | Cannot be filed if divorced during the year. |
| Married Filing Separately | Married. | Separate property states report own income. Community property states split most income 50/50. |
| Qualifying Widower | Unmarried (spouse died in the prior two years). | Must maintain a home for a dependent child (biological/adopted) for the WHOLE year and provide > 50% of home costs. |
| Head of Household (HoH) | Unmarried (or lived apart from spouse for the last 6 months). | Must maintain a home for a qualifying person for MORE THAN HALF the year. (Dependent parents do not need to live with the taxpayer). |
Qualifying Dependents (Child vs. Relative)
| Test Category | Qualifying Child (QC) | Qualifying Relative (QR) |
|---|---|---|
| Relationship | Child, stepchild, sibling, or descendant of any of these. | Related to taxpayer in specified ways OR lived with taxpayer for the entire year. |
| Age | Under 19, or under 24 (full-time student), or permanently disabled. | No age limit. |
| Residency | Lived with taxpayer for more than 50% of the year. | No requirement if related; otherwise, must live in household for entire year. |
| Support | Child must NOT have provided > 50% of their own support. | Taxpayer MUST provide > 50% of the relative's total support. |
| Gross Income | No specific gross income test. | Relative's gross income must be less than the Exemption Amount ($5,300 for 2026). |
Gross Income: Concepts & Accounting
- Realization: The economic event that triggers income (e.g., a sale).
- Recognition: Recording the income on the tax return.
Accounting Method
- Cash Method: Recognition occurs when revenue is actually or constructively received.
- Accrual Method: Recognition occurs when revenue is earned.
Gross Income: Taxable Items
| Income Category | Recognition Rule |
|---|---|
| Salaries and Wages | Money, property (at FMV), and bargain purchases from an employer. |
| Guaranteed Payments | Taxable ordinary income to the receiving partner. |
| Taxable Fringe Benefits | FMV included unless specifically excluded. Life insurance premiums > $50,000 coverage and employer Roth 401(k) contributions are taxable. |
| State/Local Tax Refunds | Taxable only if the taxpayer itemized deductions in the prior year (tax benefit rule). |
| Gambling Winnings | Fully included. Losses are an itemized deduction strictly limited to the extent of winnings. |
| Prizes and Awards | FMV is taxable unless assigned directly to a charity without taking possession. |
| Cancellation of Debt | Generally taxable income, subject to insolvency/bankruptcy exceptions. |
Gross Income: Investment & Other Income
Interest Income
- Taxable Interest: Includes interest from corporate bonds, bank
accounts, and seller-financed mortgages. Amortization of a bond discount is also treated
as taxable interest income.
- Interest on U.S. Treasury bonds is taxable at the federal level but is exempt from all state and local income taxes.
- Tax-Exempt Interest:
- Interest on State and Local government (municipal) bonds is generally exempt from federal income tax.
- Interest from U.S. Series EE Savings Bonds may be excluded if used for qualified higher education expenses (this exclusion is subject to an AGI phase-out of $101,800 - $116,850 Single / $152,750 - $182,650 MFJ for 2026).
Dividend Distribution "Waterfall"
The tax treatment of a corporate distribution is determined by flowing through these three sequential buckets:
Qualified dividends that meet specific source and holding period requirements are taxed at lower long-term capital gains rates.
Annuities
Each annuity payment is split between a non-taxable return of capital and taxable ordinary income. This is calculated using an exclusion ratio ($$\frac{\text{Investment in Contract}}{\text{Expected Total Return}}$$). If the annuitant lives beyond their life expectancy, any additional payments are fully taxable as ordinary income.
Social Security Income
Taxability depends on the taxpayer's Provisional Income.
- Low Income: 0% of benefits are taxable. (Provisional income below $25,000 Single / $32,000 MFJ).
- Middle Income: Up to 50% of benefits are taxable. (Income between the low and upper thresholds).
- Upper Income: Up to 85% of benefits are taxable. (Provisional income above $34,000 Single / $44,000 MFJ).
Net Investment Income Tax (NIIT)
A 3.8% tax applies to the lesser of net investment income or the excess of modified AGI over a threshold ($250,000 for MFJ, $200,000 for Single/HoH).
Gross Income: Nontaxable & Partially Taxable Items
| Item Category | Tax Treatment & Limitations (2026) |
|---|---|
| Life Insurance Proceeds | Generally fully excluded from the beneficiary's gross income. |
| Gifts & Inheritances | Nontaxable to the recipient. |
| Physical Injury Awards | Personal physical injury or illness awards, workers' compensation, and Medicare are excluded. |
| Accident Insurance | Excluded only if the taxpayer paid the premiums. |
| Foreign-Earned Income | Up to $132,900 can be excluded if strict residency tests are met. |
| Scholarships (Degree) | Excludable for tuition and fees. Amounts used for room and board are fully taxable. |
| Scholarships (Non-Degree) | Fully taxable at fair market value. |
| Tuition Reductions (Grad) | Taxable if it represents their only compensation; nontaxable if provided in addition to other taxable compensation. |
Schedule C Details & SE Tax
Business Interest Expense Limitation
For businesses with average gross receipts over $30 million, the business interest expense deduction is limited to the sum of:
- Business interest income
- 30% of the adjusted taxable income
- Floor plan financing interest
Common Nondeductible Sch. C Expenses
- Salaries paid to the sole proprietor (these are considered a draw/withdrawal)
- Federal income tax
- Bad debt expense for a cash-basis taxpayer
- Personal portion of auto, travel, and meal expenses
- Charitable contributions (these are an itemized deduction on Schedule A)
Self-Employment Tax Calculation
Nontaxable Fringe Benefits
| Benefit Type | Tax Treatment & 2026 Limits |
|---|---|
| Health Insurance | Employer-paid premiums are excludable. Payouts are includable unless reimbursing medical expenses or permanent bodily loss. |
| Educational Expenses | Up to $5,250 excluded (applies to tuition or student loan payments). |
| Adoption Assistance | Up to $17,670 excluded (Phases out for MAGI between $265,080 - $305,080). |
| Dependent Care | Up to $5,000 excluded. |
| Transit & Parking | Up to $340 per month for each category excluded. |
| Flexible Spending (FSA) | Up to $3,400 in pre-tax contributions. Funds are "use it or lose it" (with a 2.5-month grace period). |
| De Minimis / Meals | Too small to account for (De Minimis) and meals/lodging provided for the convenience of the employer are excluded. |
Rental & Hobby Income/Loss
Rental Income (Schedule E)
- Rented Fewer than 15 Days: Treated as a personal residence. Rental income is excluded from gross income. Mortgage interest and real estate taxes are reported as itemized deductions on Schedule A (no proration needed).
- Rented 15 or More Days and Used as a Residence: (personal use exceeds the greater of 14 days or 10% of rental days): Expenses must be allocated between personal and rental use based on days used. Rental expenses are deductible only to the extent of rental income (no net loss allowed; excess carried forward). The personal portion of mortgage interest and real estate taxes may be itemized on Schedule A. If personal use is below this threshold, treat as a full rental property (no allocation; losses possible subject to passive activity, at-risk, and other rules).
Hobby Losses
If an activity is not engaged in for profit, expenses are not deductible. Income is still included in gross income. The IRS uses a nine-factor test to determine if an activity is a business (for profit) or a hobby:
- Carrying on the activity in a businesslike manner.
- The expertise of the taxpayer or their advisors.
- The time and effort expended by the taxpayer.
- Expectation that assets used in the activity may appreciate in value.
- The success of the taxpayer in carrying on other similar or dissimilar activities.
- The activity's history of income or losses.
- The amount of occasional profits, if any.
- The financial status of the taxpayer.
- Elements of personal pleasure or recreation.
Taxation of Retirement Plan Distributions
The taxability of IRA distributions depends on the type of IRA and whether contributions were deductible.
| Type of IRA | Principal | Earnings |
|---|---|---|
| Traditional Deductible | Taxable | Taxable |
| Traditional Nondeductible | Nontaxable | Taxable |
| Qualified Roth | Nontaxable | Nontaxable |
| Non-Qualified Roth | Nontaxable | Taxable |
Distributions before age 59½ generally incur a 10% penalty, but exceptions exist for death, disability, medical expenses, first-time home purchase (up to $10k), education, and birth/adoption ($5k).
Tax Treatment of Divorce-Related Payments
| Payment Type | Agreements Executed ≤ Dec 31, 2018 | Agreements Executed After Dec 31, 2018 |
|---|---|---|
| Alimony | Taxable income to recipient. Above-the-line deduction for payor. |
Not taxable to recipient. Not deductible by payor. |
| Child Support | Not taxable to recipient; Not deductible by payor. | |
| Property Settlements | Not a taxable event (carryover basis applies to the property). | |
Note: Payments are treated as child support first if the payment amount is scheduled to be reduced based on a child-related contingency (e.g., child turning 18).
Adjustments for AGI ("Above the Line")
| Adjustment | 2026 Rule / Limitation |
|---|---|
| Educator Expenses | Up to $300 for eligible K-12 teachers. |
| Student Loan Interest | Up to $2,500; subject to MAGI phase-out. |
| Health Savings Account (HSA) | Pre-tax contributions up to $4,400 (Self) / $8,750 (Family). |
| Self-Employment Tax | 50% of SE taxes paid is deductible. |
| Self-Employed Health Insurance | 100% of premiums are deductible. |
| Self-Employed Retirement | Contributions to SEP, SIMPLE, or Solo 401(k). |
| Alimony Paid | Only for divorce agreements executed on or before Dec 31, 2018. |
| Early Withdrawal Penalty | Penalty on early withdrawal of savings is fully deductible. |
| Auto Loan Interest (U.S.) | Up to $10,000 for personal-use U.S.-assembled vehicles (subject to MAGI phase-out). |
Itemized Deductions (Schedule A)
| Deduction | Limitation / Rule |
|---|---|
| Medical Expenses | Deductible to the extent qualified expenses exceed 7.5% of AGI. |
| State & Local Taxes (SALT) | Limited to $40,400 (if income < $505,000), then phases down to $10,000. |
| Home Mortgage Interest | Deductible on up to $750,000 of indebtedness (primary and secondary home). |
| Investment Interest | Limited to net taxable investment income. |
| Charitable Contributions | Limited to 60% of AGI for cash; 30% for LTCG property. 5-year carryforward. |
| Casualty Losses | Federally declared disasters only. Loss minus $100 per event, minus 10% of AGI. |
| Gambling Losses | Deductible only to the extent of recognized gambling winnings. |
Standard & Additional Deductions
Taxpayers can take the greater of their standard deduction or itemized deductions.
Additional Standard Deduction & Senior Relief
An additional deduction is available for taxpayers who are age 65 or older and/or blind.
- Unmarried: $2,050 for each condition (age or blindness).
- Married: $1,650 for each condition, per taxpayer.
OBBBA Senior Deduction (2026): Taxpayers age 65 and older can take an additional $6,000 deduction per qualifying individual. This is available to single filers earning $75,000 or less, and couples filing jointly earning $150,000 or less (up to a $12,000 deduction if both spouses are 65+).
Casualty Loss Calculation
Remember, personal casualty losses are deductible only if they occur in a federally declared disaster area. The calculation is as follows:
- Determine Loss Amount: Take the lesser of the property's lost cost (adjusted basis) or its decreased FMV.
- Subtract Insurance: Reduce the loss amount by any insurance reimbursement you receive.
- Apply $100 Floor: Subtract $100 from the loss for each separate casualty event.
- Apply 10% AGI Floor: Subtract 10% of your Adjusted Gross Income (AGI) from the remaining loss.
QBI Deduction (Section 199A)
A deduction of up to 20% of Qualified Business Income from flow-through entities.
- QTB: Qualified Trade or Business (Standard businesses).
- SSTB: Specified Service Trade or Business (Health, law, accounting, consulting, athletics, financial services).
New in 2026 (OBBBA)
A new $400 minimum QBI deduction applies to active business owners who materially participate and have at least $1,000 of QBI, regardless of income limitations that might otherwise eliminate their deduction.
Deductibility Thresholds
($201,750 S / $403,500 MFJ)"] Income --> Between["Between Thresholds"] Income --> Above["Above Threshold
($276,750 S / $553,500 MFJ)"] Below --> Full["Full 20% Deduction
for both QTB & SSTB"] Between --> PhaseQTB["QTB: W-2 & Property Limits Phase In"] Between --> PhaseSSTB["SSTB: Base Deduction Phases Out"] Above --> LimitQTB["QTB: Subject to strict W-2 / Property Limits"] Above --> NoSSTB["SSTB: No Deduction Allowed"]
Tax Credits
Credits reduce tax liability dollar-for-dollar. Refundable credits can result in a refund if they exceed the tax owed; nonrefundable credits can only reduce liability to zero.
| Credit Name | Type | Description & 2026 Limits |
|---|---|---|
| Child Tax Credit | Partially Refundable | Up to $2,200 per qualifying child. Refundable portion is the lesser of excess credit, (earned income - $2,500) * 15%, or $1,700 per child. |
| Earned Income Credit | Refundable | For low-to-moderate-income working individuals who live in the U.S. for more than half the year. |
| Child and Dependent Care | Nonrefundable | Ranges from 20% to 50% of expenses (based on AGI). Max $3,000 for one qualifying person, $6,000 for two or more. |
| American Opportunity (AOTC) | Partially Refundable | Max $2,500 per student (first 4 years of college). 40% of the credit is refundable. |
| Lifetime Learning (LLC) | Nonrefundable | Max $2,000 per taxpayer (unlimited years of education). |
| Adoption Credit | Nonrefundable | For qualified adoption expenses up to $17,670. Excess carries forward 5 years. |
| Foreign Tax Credit | Nonrefundable | Lesser of foreign taxes paid or the U.S. tax liability on foreign income. |
Kiddie Tax
The net unearned income of a dependent child is taxed at the parents' marginal rate.
2026 Thresholds:
- First $1,350: Tax-free (Limited Standard Deduction)
- Next $1,350: Taxed at Child's Rate
- Over $2,700: Taxed at Parents' Marginal Rate
Estimated Taxes & Underpayment Penalty
Taxpayers must make estimated tax payments if they expect to owe at least $1,000 in tax and their withholding is insufficient.
Avoiding the Penalty
To avoid a penalty, withholding and timely estimated payments must equal or exceed the lesser of:
- 90% of the current year's tax liability, OR
- 100% of the prior year's tax liability (110% if prior year AGI > $150,000).
Property Taxation
Property Basis & Acquisition
| Acquisition Method | Basis Rule & Holding Period |
|---|---|
| Purchased Property | Basis equals the cost plus capital improvements and any costs to place the asset into service. Ordinary repairs and maintenance are expensed. |
| Inherited Property | Basis is the Fair Market Value (FMV) at the date of death OR the alternate valuation date (earlier of 6 months after death or date of distribution). The holding period is always long-term. |
| Gifted Property | Generally, the donor's adjusted basis (NBV) carries over. If the FMV at the date of the gift is lower than the NBV, dual basis rules apply depending on the future sales price. |
| Converted (Personal to Business) | Basis for Depreciation: Lesser of the property's adjusted basis or its FMV on the date of conversion. Basis for Gain/Loss: For gains, use adjusted basis. For losses, use the lesser of adjusted basis or FMV at conversion. |
| Stock Splits & Dividends | Generally nontaxable. The original basis is allocated over the new total number of shares (basis spreading). |
Basis of Gifted Property
The general rule is that the donee's basis is the same as the donor's basis (NBV). However, an exception applies if the FMV at the date of the gift is lower than the donor's basis.
| If Future Sales Price is... | Basis to Use | Result |
|---|---|---|
| Greater than Donor's NBV | Donor's NBV | Gain |
| Less than FMV at Gift Date | FMV at Gift Date | Loss |
| Between FMV and NBV | Sales Price | No Gain or Loss |
Holding Period & Depreciation Basis
- Holding Period: If the donor's basis is used, the holding period tacks. If the FMV is used, the holding period starts at the date of the gift.
- Depreciation Basis: The basis for depreciation is the lesser of the donor's adjusted basis or the FMV at the date of the gift.
Business Property Deductions & Amortization
| Deduction Type | Rules & Limitations (2026) |
|---|---|
| De Minimis Safe Harbor | Allows immediate expensing of low-cost property. The limit is $5,000 per item if the taxpayer has an applicable financial statement (AFS), and $2,500 per item without an AFS. |
| Section 179 Deduction | Immediate expensing of qualifying business property. Maximum deduction is $2,560,000. Phased out dollar-for-dollar once property placed in service exceeds $4,090,000. Cannot create a net loss. |
| Bonus Depreciation | Immediate expensing of a percentage of the cost of eligible property. Applies to tangible property with a recovery period of 20 years or less and computer software. Applies to both new and used property. |
| Organizational & Start-Up Costs | Immediate expense of the first $5,000 for each category (reduced dollar-for-dollar if costs exceed $50,000). Remaining costs are amortized over 180 months (15 years). Excludes costs of issuing equity. |
| Section 197 Intangibles | Purchased intangibles (goodwill, franchises, trademarks, customer lists) are amortized using the straight-line method over 180 months (15 years). |
| Depletion | Cost Depletion is acceptable for GAAP and Tax. Percentage Depletion (a statutory percentage of gross income) is allowed for Tax only. |
Depreciation (MACRS)
Personal Property
| Class | Property Types |
|---|---|
| 3-Year | Special tools, certain racehorses |
| 5-Year | Cars, light trucks, computers, copiers |
| 7-Year | Furniture, fixtures, machinery, equipment |
| 10-Year | Boats, water transportation equipment |
| 15-Year | Qualified improvements to interior of nonresidential buildings |
Convention: Uses Half-Year convention by default. The Mid-Quarter convention is required if more than 40% of personal property is placed in service during the 4th quarter.
Real Property (Straight-Line)
| Class | Property Types |
|---|---|
| 20-Year | Farm buildings, municipal sewers |
| 27.5 Years | Residential Rental Property |
| 39 Years | Non-Residential (Business) Property |
Convention: Always uses the Mid-Month convention. Land is never depreciated.
Advanced Depreciation Rules
Additional Section 179 Rules
- The property cannot have been acquired from a related party.
- Land and improvements to land do not qualify.
- The deduction is not available for investment, rental, or most real property (though qualified improvements to non-residential buildings do qualify).
Depreciation in Year of Disposal
- Half-Year Convention: In the year of disposal, you take a half-year of depreciation (multiply the normal annual depreciation amount by 50%).
- Mid-Quarter Convention: Treat the property as sold in the midpoint of the quarter it was disposed in. For a 7-year asset sold in Q1, you would take the full year's depreciation and multiply it by 12.5%.
- Mid-Month Convention (Real Property): In the year of disposal, depreciation is taken for the number of full months plus a half-month for the month of disposal.
Capital Gains & Losses
| Feature | Individuals | C-Corporations |
|---|---|---|
| Net Loss Deduction | $3,000 max per year | $0 (No ordinary deduction) |
| Carryback | None | 3 Years |
| Carryforward | Indefinite | 5 Years |
Special Rates & Cases
- Unrecaptured Section 1250 Gain: Taxed at a maximum rate of 25% (applies to previously taken straight-line depreciation on real property).
- Collectibles: Taxed at a maximum rate of 28%.
- Worthless Stock: Treated as a capital loss as if sold on the last day of the tax year it becomes worthless.
Nondeductible Losses
- Wash Sales: A loss is disallowed if an identical security is repurchased within 30 days before or after the sale. The disallowed loss is added to the basis of the new stock.
- Related Party Transactions: Losses between related parties (e.g., siblings, >50% owned entities) are disallowed.
Entity Taxation
C-Corporation: Filing & Estimated Taxes
Filing Requirements
C-Corps must file Form 1120 by the 15th day of the 4th month after their year-end. A 6-month extension is available.
Estimated Taxes
Corporations must pay estimated taxes in four quarterly installments.
- Small Corps (<$1M TI): Required to pay the lesser of 100% of the current year's tax or 100% of the prior year's tax.
- Large Corps (>$1M TI): Must pay 100% of the current year's tax.
Corporate Accounting & Key Concepts
Accrual vs. Cash Method
The accrual method is required for:
- Accounting for inventory (purchases and sales).
- Tax shelters.
- C-Corporations and partnerships with C-Corp partners with average annual gross receipts exceeding $30 million for the prior 3-year period.
Bonus Accruals (for Accrual-Basis Taxpayers)
Bonuses are deductible in the tax year they are accrued if they are paid out within 2.5 months of the taxpayer's year-end.
Bad Debts
- Accrual Basis: Deductible only in the year the specific debt is written off (direct write-off method). The allowance method is not permitted for tax.
- Cash Basis: Not deductible, as the income was never recognized.
C-Corporation: Book-to-Tax Reconciliation (Schedule M-1)
Reconciles book income (GAAP) with taxable income. Start with Net Income per books and adjust for differences.
| Item | Book Treatment | Tax Treatment | M-1 Effect |
|---|---|---|---|
| Federal Income Tax Expense | Expense | Not Deductible | Add back |
| Municipal Bond Interest | Income | Not Taxable | Subtract |
| Life Insurance Premiums (Corp is beneficiary) | Expense | Not Deductible | Add back |
| Life Insurance Proceeds (Key Staff) | Income | Not Taxable | Subtract |
| Penalties & Fines | Expense | Not Deductible | Add back |
| Meals | 100% Expense | 50% Deductible | Add back 50% |
| Depreciation | Straight-Line | MACRS (Accelerated) | Subtract difference |
| Installment Sales | Income recognized at sale | Income recognized when cash is received | Subtract (until cash received) |
| Rent/Royalties in Advance | Income recognized when earned | Income recognized when received | Add back |
| Warranties Expense | Accrue estimated expense | Deduct only when paid | Add back difference |
C-Corporation: Key Deductions & Losses
Dividends Received Deduction (DRD)
Deduction for dividends received from other domestic corporations. The DRD is the lesser of the percentage of dividends received or the percentage of taxable income.
- 0-20% Ownership: 50% DRD
- 20-80% Ownership: 65% DRD
- >80% Ownership (Affiliated): 100% DRD
Charitable Contributions
Deduction is limited to 10% of taxable income (before DRD, NOL/Capital Loss carrybacks). Accrued contributions are deductible if paid within 3.5 months of year-end. 5-year carryforward.
Net Operating Losses (NOLs)
- NOLs before 2018: Carry back 2 years, carry forward 20 years. Offsets 100% of future income.
- NOLs in 2018-2020: Carry back 5 years, carry forward indefinitely. Offsets 100% of future income.
- NOLs after 2020: No carryback, carry forward indefinitely. The NOL deduction is limited to 80% of taxable income.
Capital Losses
Corporate capital losses can only be used to offset capital gains. They can be carried back 3 years and carried forward 5 years.
Additional Corporate Deductions
Executive Compensation
A publicly held corporation cannot deduct compensation expenses in excess of $1,000,000 paid to its highest-paid employees.
Business Gifts
Deductible up to a maximum of $25 per recipient per year.
Life Insurance Premiums
- Corporation as Beneficiary (Key Person): Premiums are not deductible.
- Employee as Beneficiary (Fringe Benefit): Premiums are deductible as an employee benefit.
Business Casualty Losses
If business property is damaged, the loss is the lesser of the change in FMV or the adjusted basis, reduced by any insurance proceeds. If fully destroyed, the loss is the adjusted basis less insurance proceeds.
C-Corporation: Special Taxes & Credits
Accumulated Earnings Tax
A penalty tax of 20% on undistributed earnings accumulated beyond reasonable business needs. C-Corps are entitled to a minimum credit of $250,000.
Personal Holding Company (PHC) Tax
A penalty tax of 20% on the undistributed income of a PHC. A company is a PHC if:
- More than 50% of the stock is owned by 5 or fewer individuals.
- 60% or more of adjusted ordinary gross income consists of passive income (Net rent, Royalties, Interest, Dividends).
Foreign Tax Credit
Calculated as the lesser of foreign taxes paid or the US tax liability on foreign income. (Worldwide TI * US Rate) * (Foreign TI / Worldwide TI). Carry back 1 year, forward 10 years.
S-Corporations
Eligibility & Election
Must be a domestic corp with one class of stock, <= 100 shareholders (individuals, estates, certain trusts), and no nonresident alien shareholders, C-Corporations, or Partnerships. Note: Family members count as one shareholder. Differences in voting rights (voting vs. non-voting) do not create a second class of stock.
Election Timing: To be effective for the current year, Form 2553 must be filed by the 15th day of the 3rd month of the tax year (March 15 for calendar year). An election made after this date becomes effective on the first day of the next tax year.
Shareholder Basis & Loss Limitation
Losses are deductible to the extent of the shareholder's basis, which includes both stock basis and debt basis (loans made directly by the shareholder to the S-Corp).
Income and losses are allocated to shareholders on a per-share, per-day basis. Unlike partnership income, S-Corp earnings passed through to shareholders are generally not subject to self-employment taxes.
Fringe Benefits
- Non-Shareholder Employees & ≤ 2% Shareholders: Benefits are deductible by the S-Corp.
- > 2% Shareholders: Benefits are generally not deductible by the S-Corp unless the cost is included in the employee-shareholder's W-2 income.
Separately Stated Items
Items not included in ordinary business income pass through separately to shareholders (e.g., Net rental real estate income/loss, Interest/dividend income, Capital gains/losses, Section 179 deduction, Charitable contributions).
Termination of S-Election
- Voluntary: Shareholders holding more than 50% of the stock consent.
- Involuntary: Fails to meet any qualification requirement.
- Excess Passive Income: More than 25% of gross receipts are from passive income for 3 consecutive years (only if S-Corp has prior C-Corp E&P).
Partnerships
Tax Forms
- Form 1065: Informational return filed by the partnership.
- Schedule K: Reports the partnership's total income, deductions, credits, etc.
- Schedule K-1: Provided to each partner, showing their individual share of the items on Schedule K.
Partner Basis & Loss Limitation
A partner's basis is calculated using their capital account plus their share of partnership liabilities. Losses are deductible to the extent of this total tax basis. Withdrawals are nontaxable but decrease basis.
Guaranteed Payments
Payments to a partner for services or use of capital, made without regard to partnership income. They are a business expense to the partnership and taxable ordinary income to the partner.
Pass-Through Basis Calculations
Understanding how basis flows is critical for both Partnerships and S-Corporations.
The Impact of Liabilities (Crucial Difference)
| Entity | How Debt Affects Basis |
|---|---|
| Partnership (LLC/LLP) | Included in Tax Basis. A partner's share of the partnership's liabilities (both recourse and nonrecourse) is added directly to their outside tax basis. |
| S-Corporation | NOT Included in Stock Basis. S-Corp liabilities do not increase a shareholder's stock basis. However, a shareholder can establish a separate Debt Basis only through direct loans made personally by the shareholder to the S-Corp. |
Tax-Exempt Organizations
Most common is a Section 501(c)(3) organization. They are exempt from federal income tax but may be subject to tax on Unrelated Business Income (UBI) if the income is from a trade or business, regularly carried on, and not substantially related to their tax-exempt purpose.
- Public Charities: Receive broad public support (at least 1/3 of total support must be from the public/government). Includes churches, schools, and hospitals.
- Private Foundations: Receive support from a single major source and primarily make grants to other organizations. Subject to stricter rules and excise taxes.
State & Local Taxation (SALT)
Nexus
Nexus is the minimum level of connection a business must have with a state before it is subject to the state's tax jurisdiction (e.g., owning property, resident employees, or significant sales). Public Law 86-272 protects out-of-state sellers from income tax if their only activity is soliciting orders for tangible personal property.
Apportionment (Business Income)
Business income is apportioned among states where nexus exists, typically using a three-factor formula (though some states heavily weight sales):
Allocation (Non-Business Income)
Non-business income (e.g., dividends, interest) is allocated entirely to a specific state, usually the state of commercial domicile.
Professional Responsibilities
Circular 230: Practice Before the IRS
Overview
Circular 230 provides regulations governing practice before the IRS. It covers authority to practice, duties and restrictions, sanctions for violations, and disciplinary proceedings.
Tax Preparer Roles
A tax preparer is anyone who prepares a substantial portion of a tax return for compensation. They must have an IRS Preparer Tax Identification Number (PTIN).
- Signing Tax Preparer: The individual with primary responsibility for the overall accuracy of the return.
- Non-Signing Tax Preparer: An individual who prepares all or a substantial portion of a return but does not have primary responsibility (e.g., assists the signing preparer).
Key Practitioner Duties & Restrictions
- Information to Be Furnished: Must promptly provide records to the IRS, unless believed in good faith to be privileged.
- Knowledge of Client Omission: Must advise the client of noncompliance and potential penalties. Not required to notify the IRS or withdraw.
- Diligence as to Accuracy: Must exercise due diligence in preparing and filing documents.
- Conflicts of Interest: Cannot represent a client if there is a conflict, unless representation is not prohibited by law, the practitioner believes they can competently represent all clients, and all affected clients waive the conflict in writing.
- Fees: Cannot charge an "unconscionable fee." Contingent fees are generally not allowed, with exceptions for IRS examinations, refund claims, and judicial proceedings.
- Return of Client Records: Must return client records upon request, even if a fee dispute exists.
- Practice by Former Government Employees: Restrictions apply. For example, if an employee "personally and substantially participated" in a matter, they can never represent clients on that matter.
Tax Return Position Standards & Penalties
Tax Return Position Standards
| Standard | Chance of Success | Use Case |
|---|---|---|
| Reasonable Basis | > 20% | Avoids negligence penalty if position is disclosed. |
| Substantial Authority | ~ 40% - 50% | Avoids substantial underpayment penalty even if not disclosed. |
| More-Likely-Than-Not | > 50% | Required for tax shelters and reportable transactions. |
Taxpayer Penalties
- Failure-to-File: 5% per month (max 25%). Minimum penalty if >60 days late is lesser of $535 or 100% of tax due.
- Failure-to-Pay: 0.5% per month (max 25%).
- Substantial Understatement / Negligence: 20% of the understatement. An understatement is "substantial" if it exceeds the greater of 10% of the correct tax or $5,000.
- Substantial Valuation Misstatement: 20% penalty if the valuation of property claimed is 150% or more of the correct value (increases to 40% for gross misstatements).
- Fraud: Civil penalty is 75% of the understatement (IRS must prove by "preponderance of evidence"). Criminal penalties include fines up to $100,000 ($500,000 for corps) and imprisonment (government must prove "beyond a reasonable doubt").
- Earned Income Credit Penalty: Taxpayers who negligently claim the EIC may be disallowed from claiming it for two years (ten years in cases of fraud).
Tax Authoritative Hierarchy & Sources
The determination of a tax position's authority is based on a strict hierarchy. If a conflict occurs, the source higher in the hierarchy governs.
- Internal Revenue Code (IRC): Highest Legislative Authority.
- Treasury Regulations: Highest Administrative Authority (interprets the IRC).
- Revenue Rulings & Procedures: IRS application of the law to specific factual situations.
- Private Letter Rulings (PLR): Binding only for the specific requesting taxpayer.
Unsupported Tax Positions
- Frivolous Position: A position with less than a 20% chance of success; has no basis in law or authority. Patently improper.
- Listed Transaction: A transaction identified by the IRS as a tax avoidance transaction. Strict disclosure is required.
Common Law Duties & Legal Liability
A tax professional can be held civilly liable to clients and, under certain doctrines, to third parties who rely on their work.
| Level of Fault | Description & Key Elements | Liability to Third Parties |
|---|---|---|
| Breach of Contract | Failure to perform obligations strictly outlined in the engagement letter. | Liable only to the client and named third-party beneficiaries. |
| Ordinary Negligence | Failure to exercise reasonable/due care. Elements: Duty, Breach, Causation, Damages. | Liable to client and any foreseen/known third parties who relied on the work (Ultramares limits this to primary beneficiaries). |
| Gross Negligence (Constructive Fraud) | Reckless disregard for the truth or lack of even slight care. | Broad liability to all foreseeable third parties who relied on the work. |
| Actual Fraud | Intentional misrepresentation. Elements: Material misrepresentation, Scienter (intent to deceive), Intent to induce reliance, Justifiable reliance, Damages. | Broad liability to all foreseeable third parties. Can also carry criminal penalties. |
Taxpayer Privileges & Workpapers
The tax practitioner-taxpayer privilege protects confidential communications but does not apply to criminal cases or tax shelters. Workpapers are the preparer's property but cannot be shared without client consent, except for a valid court subpoena, a quality/peer review, or in defense of a lawsuit.
Tax Preparer Penalties & Legal Liability
Preparer Conduct Penalties
- Understatement due to Unreasonable Position: Penalty is the greater of $1,000 or 50% of the preparer's fee.
- Willful or Reckless Conduct (Fraud): Penalty is the greater of $5,000 or 75% of the preparer's fee.
- Aiding and Abetting Understatement: Civil penalty of $1,000 for individuals ($10,000 for corporations). IRS has the burden of proof.
- Wrongful Disclosure/Use of Information: $250 penalty for each instance (max $10,000). Exceptions include court orders, quality reviews, and client consent.
Preparer Compliance Penalties
A penalty of $60 per failure (max $31,500) for failures to sign the return, provide a copy to the taxpayer, furnish an ID number, or retain records for 3 years. A $665 penalty applies for endorsing a client's refund check.
IRS Audits, Appeals, and Courts
Types of Audits & Selection
Audits: Correspondence (mail), Office (IRS office), Field (taxpayer's location). Selection Methods: Statistical models, random selection, prior year audits, information return discrepancies.
Appeals Process
Admin Appeal?"} Appeals -->|Yes| Conference["IRS Appeals Office Conference"] Conference --> Agreement{"Agreement Reached?"} Appeals -->|No| Letter90["Issue 90-Day Letter (Notice of Deficiency)"] Agreement -->|No| Letter90 Agreement -->|Yes| Resolved["Case Resolved"] Letter90 --> Court["Taxpayer can petition U.S. Tax Court (within 90 days)"]
Trial Courts
- U.S. Tax Court: No payment required to petition. No jury trial. Judges are tax experts.
- U.S. District Court: Must pay tax first and sue for a refund. Jury trial is an option. Located in taxpayer's geographic area.
- U.S. Court of Federal Claims: Must pay tax first. No jury trial.
Regulatory Bodies & Legal Concepts
Regulatory Power
- State Boards of Accountancy: Have the sole power to grant, suspend, and revoke a CPA's license. Can impose fines and require CPE.
- AICPA & State Societies: Can sanction members (e.g., suspend membership), but cannot revoke a CPA's license.
- SEC: Can censure, suspend, or revoke the right to practice before the SEC for CPAs.
Burden of Proof
- Civil Cases: "Preponderance of the evidence." Generally on the taxpayer.
- Criminal Cases: "Beyond a reasonable doubt." On the government.
Business Law
Contract Law: Formation & Sources
Methods of Formation
- Express Contract: Formed by language, oral or written.
- Implied-in-Fact Contract: Formed by conduct.
- Unilateral Contract: One promise given in exchange for performance.
- Bilateral Contract: Two promises; a promise for a promise.
Sources of Contract Law
- Common Law: Governs contracts for services, employment, insurance, and real estate.
- Uniform Commercial Code (UCC): Governs contracts for the sale of goods (moveable tangible property).
Contract Law: Enforceability & Remedies
Elements of a Legally Enforceable Contract
- Agreement: Offer and Acceptance (Mutual Assent).
- Consideration: A bargained-for exchange of legal value. A promise to perform an existing duty is not valid consideration.
- Lack of Defenses: The contract must be free from any defenses.
Contract Performance & Substitution
- Major vs. Minor Breach: A major breach is substantial, discharging the non-breaching party and allowing a suit for damages. A minor breach does not discharge the non-breaching party but allows a suit for damages.
- Accord & Satisfaction vs. Novation: Accord & Satisfaction is an agreement to substitute one contract for another, with satisfaction being the execution of that new agreement. A Novation occurs when a new party is substituted for an old party in an existing contract.
Remedies for Breach
- Compensatory Damages: Puts the non-breaching party in the position they would have been in had the contract been performed.
- Specific Performance: Ordered when monetary damages are inadequate (e.g., for unique items like land).
- Liquidated Damages: A clause in the contract that specifies damages. Must be a reasonable estimate and not a penalty.
- Parol Evidence Rule: Prohibits prior or contemporaneous oral statements from varying the terms of a fully integrated written contract.
Contract Law: The Offer & Acceptance
The Offer
Must be a serious offer with definite and certain terms. Advertisements are generally invitations, not offers.
Termination of Offer:
- Revocation by Offeror: Effective when received by the offeree. An option contract (consideration paid to keep offer open) is irrevocable.
- Rejection by Offeree: A counteroffer is a rejection. Effective when received by the offeror.
- By Operation of Law: Death or incompetency of parties, destruction of subject matter, or illegality.
The Acceptance
- Mailbox Rule: Acceptance is effective when SENT (dispatched), regardless of when it is received.
- Common Law (Mirror Image Rule): Acceptance must exactly mirror the offer's terms.
- UCC (Sale of Goods): Mirror Image Rule does not apply. Minor changes are acceptable.
Contract Law: Defenses
| Defense | Effect on Contract | Description & Key Rules |
|---|---|---|
| Fraud | Void or Voidable | Fraud in the Execution: Void (the party did not know it was a contract). Fraud in the Inducement: Voidable (the party knew it was a contract but terms were misrepresented). Must prove misrepresentation of material fact, scienter, intent, reliance, and damages. |
| Duress | Void or Voidable | Physical threats make a contract Void. Economic or social threats make a contract Voidable. |
| Mutual Mistake | Voidable | A mistake made by both parties regarding a material fact of the contract. |
| Illegality | Void | If the subject matter is illegal, it is void. Note: Contracts with workers lacking a Revenue-Raising license are valid; those lacking a Public Protection license (e.g., CPA, Doctor) are void. |
| Incapacity | Void or Voidable | Contracts with minors are voidable. Contracts with adjudicated incompetent individuals are void. |
| Statute of Frauds | Unenforceable if oral | Must be in writing to be enforceable: • Marriage agreements • Contracts that cannot be completed within one year • Real estate/land sales and leases over one year • Promises by an executor to personally pay estate debts • Sales of goods $500 or more (Exceptions: Custom goods, merchant 10-day rule, court admission, or performed goods) • Guarantor/Surety promises |
| Impossibility | Discharged | Events occurring after formation make performance objectively impossible. |
Agency Law
Agent's Power to Bind Principal
- Actual Authority: Power and right. Can be Express (written/oral) or Implied (reasonably necessary).
- Apparent Authority: Power but no right. Created by the principal's words or actions causing a third party to reasonably believe the agent has authority.
- Agency by Estoppel: If a principal causes a third party to believe another person is their agent, and the third party reasonably relies on that belief, the principal is "estopped" (prevented) from denying the agency relationship.
- Ratification: No power or right. The principal affirms an unauthorized act after the fact.
Duties of Agent to Principal
- Duty of Loyalty: To act solely for the benefit of the principal, avoiding any conflicts of interest or self-dealing. The agent cannot profit secretly or represent both parties in a transaction without full disclosure and consent.
- Duty of Obedience: To obey all lawful and reasonable instructions provided by the principal.
- Duty of Reasonable Care (Performance): To perform duties with the same degree of care, skill, and diligence that a reasonable person in a similar situation would exercise.
- Duty to Account: To keep an accurate account of all money and property received and expended on behalf of the principal. The agent must not commingle the principal's funds with their own.
- Duty to Inform (or Notify): To keep the principal informed of all significant matters related to the agency relationship.
Termination of Agency
Actual authority terminates by acts of the parties (e.g., agent quits, is fired) or by operation of law (e.g., death, bankruptcy). Apparent authority must be terminated by giving notice to third parties.
Surety Law
Surety vs. Guarantor
- Surety: Directly liable on the debt. The creditor can proceed directly against the surety upon the debtor's default.
- Guarantor: Liable only if the creditor first tries and fails to collect from the debtor.
Surety's Rights
- Exoneration: Can compel the debtor to pay before the surety has to pay.
- Subrogation: After paying, the surety acquires all the creditor's rights against the debtor.
- Reimbursement: Can recover from the debtor any amount the surety paid.
Surety's Defenses
A surety can use defenses like fraud by the creditor, duress upon the debtor, illegality of the underlying obligation, and discharge of the debtor's obligation. A surety's own incapacity or bankruptcy is also a defense.
Secured Transactions (UCC Article 9)
Governs debtor-creditor relationships where personal property (collateral) is used to secure a debt.
Secured vs. Unsecured Creditor
- Unsecured Creditor: Has no specific claim to the debtor's property. If the debtor defaults, the creditor must sue, obtain a judgment, and execute it.
- Secured Creditor: Has a legal interest (security interest) in specific personal property. Can repossess the collateral upon default without a court judgment (if done without breaching the peace).
Attachment vs. Perfection
| Process | Purpose | Requirements |
|---|---|---|
| Attachment | Establishes the creditor's rights against the debtor. | Must have all three: 1. Agreement (written or creditor takes possession). 2. Creditor gives value. 3. Debtor has rights in the collateral. |
| Perfection | Establishes the creditor's priority over third parties. | Must attach first, then achieve one of the following: 1. Filing a Financing Statement. 2. Possession of collateral. 3. Control. 4. Automatic Perfection (e.g., PMSI in consumer goods). |
Key Bankruptcy Concepts (U.S. Code)
Types of Bankruptcy & Eligibility
- Chapter 7 (Liquidation): Trustee liquidates non-exempt assets to distribute proceeds. Available to individuals, partnerships, and corporations. Excludes: railroads, insurance companies, banks, and small business investment companies.
- Chapter 11 (Reorganization): Debtor continues operating while developing a repayment plan. Excludes: stockbrokers and commodity brokers.
- Chapter 13 (Individual Debt Adjustment): Individual with regular income creates a 3- to 5-year repayment plan.
- Chapter 9: Municipal Debt Adjustment.
- Chapter 12: Family Farmers with Regular Income.
Key Features of Bankruptcy Proceedings
- Automatic Stay: Injunction halting most collection activities against the debtor.
- Section 341 Meeting: A mandatory meeting of creditors held during proceedings.
- Property of the Estate: Includes all assets at filing, plus inheritances, life insurance payouts, or divorce settlements received within 180 days after filing.
- Preferential Payments: Trustee can recover payments made to a creditor within 90 days before filing (or 1 year for an insider) that allowed the creditor to receive more than they would have in bankruptcy.
Priority of Claims in a Chapter 7 Liquidation
Unsecured claims are paid in this order:
- Domestic support obligations.
- Administrative expenses of the bankruptcy estate.
- "Gap" claims incurred in the ordinary course of business in an involuntary case.
- Wage claims earned within 180 days of filing, up to $15,150 per employee.
- Employee benefit plan contributions, up to $15,150 per employee (less wage claims paid).
- Claims of grain farmers and fishermen, up to $7,475 per claimant.
- Consumer deposits, up to $3,350 per claimant.
- Certain tax claims.
- Claims for death/personal injury from intoxicated driving.
Business Entities Summary & Corporate Doctrines
| Feature | Sole Prop. | General Partnership | LLP | Limited Partnership | LLC | S-Corp | C-Corp |
|---|---|---|---|---|---|---|---|
| Formation | No Formalities | No Formalities | File Statement | File Certificate | File Articles | File Articles | File Articles |
| Liability | Unlimited | Unlimited | Limited (own negligence) | GP: Unlimited; LP: Limited | Limited | Limited | Limited |
| Management | Owner | Partners | Partners | General Partners only | Members or Managers | Board of Directors | Board of Directors |
| Transferability | Freely | Requires consent | Requires consent | Requires consent | Requires consent | Freely | Freely |
| Taxation | Flow-Through | Flow-Through | Flow-Through | Flow-Through | Flow-Through | Flow-Through | Double Taxation |
Corporate Doctrines
- Piercing the Corporate Veil: Courts may disregard the corporate structure and hold shareholders personally liable if the entity is used improperly (e.g., commingling personal with corporate funds, inadequate capitalization, fraud).
- Ultra Vires Act: An act by a corporation that is beyond the scope of its powers as defined in its articles of incorporation.
Federal Laws & Regulations
| Regulation / Topic | Key Rules & Employer/Employee Impact |
|---|---|
| FICA (Social Security) | Funded 6.2% by the employer and 6.2% by the employee on wages up to a limit. Income includes salaries, bonuses, and commissions (excludes gifts). |
| FUTA (Unemployment) | Employer-only tax. Paid if the employer has quarterly payrolls of $1,500+ or employs someone for 20 weeks a year. Explicitly excludes self-employed individuals. |
| Worker Classification | Classification as an employee versus an independent contractor heavily relies on the degree of control the business has over the worker's behavior and financial independence. |
| Workers' Compensation | State-run, no-fault insurance for on-the-job injuries, fully funded by the employer. It only covers employees acting within the scope of their employment. |
| Affordable Care Act (ACA) | Applicable Large Employers (50+ FT employees) must offer affordable health coverage to 95% of FT employees. • Penalty 1: Fails to offer minimum essential coverage. • Penalty 2: Coverage offered is unaffordable or inadequate. |
| Foreign Corrupt Practices Act (FCPA) | Prohibits U.S. businesses and their agents from bribing foreign officials to obtain or retain business. Requires proper internal accounting controls. |