Federal Income Tax (JD Academic Unit)

# Federal Income Tax (JD Academic Unit) — Grounded Study Notes

GROUNDED - generated from real landmark US federal tax cases (Supreme Court corpus). Citations are verified legal citations; holdings extracted from landmark opinions.

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## I. Introduction & Tax System Framework

### Sources of Federal Tax Law
- The Internal Revenue Code (26 U.S.C.) is the primary statutory source and supersedes Treasury Regulations where they conflict.
- **Authority:** IRC § 61 (defining gross income) and Treasury Regulations (26 CFR 1.61-1 et seq.)

### Calculating Individual Income-Tax Liability
- Tax is computed on taxable income (gross income minus deductions), applied to rate brackets.
- **Authority:** IRC § 1(a)-(d) (tax rates and brackets, as modified by TCJA 2017)

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## II. Gross Income (IRC §61)

### All-Income Definition: §61 Breadth
**Legal principle:** Gross income includes "all income from whatever source derived" — an intentionally broad scope limited only by specific exclusions.

- **Case:** *Commissioner v. Glenshaw Glass Co.*, 348 U.S. 426 (1955)
- **Citation:** 348 U.S. 426
- **Holding:** Gain derived from a legal injury (punitive damages award) constitutes gross income under §61. The breadth of §61 reaches "undeniable accessions to wealth, clearly realized, and over which the taxpayers have complete dominion." Income does not require ordinary form; accessions to wealth in any form count.

### Compensation for Services: Wages, Salaries, Tips
- Compensation in cash is gross income. Compensation in property is also gross income at fair market value.
- **Authority:** IRC § 61(a)(1); Treas. Reg. § 1.61-2(d) (fringe benefits rule)

### Assignment of Income Doctrine
**Legal principle:** Income earned by efforts of one person cannot be assigned to another to avoid tax.

- **Case:** *Lucas v. Earl*, 281 U.S. 111 (1930)
- **Citation:** 281 U.S. 111
- **Holding:** Husband and wife entered into an agreement that earnings of either from personal efforts would be split 50-50. Held: The husband (who earned the income via legal practice) remains taxable on the full amount. "The true owner of income from personal service is the one who earns it." Anticipatory assignment of income from future services does not split tax liability.

### Imputed Income and Barter Transactions
- Fair market value of property or services received in exchange for property or services is gross income (barter transactions).
- **Authority:** IRC § 61(a)(1); Rev. Rul. 79-24, 1979-1 C.B. 60 (barter income)

### Loans and Cancellation of Debt Income
- Receipt of a loan is NOT gross income (debtor has offsetting obligation).
- But cancellation of debt may be income under IRC § 61(a)(12), subject to exceptions in §108 (insolvency, discharge in bankruptcy, qualified farm indebtedness, qualified real property business indebtedness).
- **Authority:** IRC § 108

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## III. Exclusions from Gross Income

### Gifts and Bequests
**Legal principle:** Transfers motivated by generosity or family obligation, not compensation, are excluded from gross income.

- **Case:** *Commissioner v. Duberstein*, 363 U.S. 278 (1960)
- **Citation:** 363 U.S. 278
- **Holding:** A transfer is a gift only if the donor's "dominant motive" is disinterested generosity, not compensation for services or a return-expectation transaction. Gifts are excluded from gross income under §102(a). The question is objective: would a reasonable person regard this as a gift? Employer bonuses are not gifts; they are compensation. Family bequests are presumptively gifts.

### Life Insurance Proceeds
- Death benefit proceeds from life insurance are excluded from gross income under §101(a)(1).
- **Authority:** IRC § 101(a)(1)

### Academic Scholarships and Fellowships
- Qualified scholarships (for tuition, fees, books, supplies) are excluded under §117(a).
- Amounts for room, board, or services are includible unless the recipient is a candidate for a degree and the grantor requires the services.
- **Authority:** IRC § 117

### Damage Awards for Personal Injury or Sickness
- Damages awarded for physical injury or sickness are excluded under §104(a)(2).
- **Authority:** IRC § 104(a)(2)

### Employer-Provided Fringe Benefits
- Qualifying fringe benefits (e.g., health insurance, parking, transit passes) are excluded.
- **Authority:** IRC §§ 105, 106, 119 (meals and lodging), 132 (qualified fringe benefits)

### Home Sale Exclusion
- Gain on sale of a principal residence is excluded up to $250,000 (single) / $500,000 (married filing jointly) if held and used as principal residence for 2 of 5 years before sale.
- **Authority:** IRC § 121

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## IV. Deductions and Losses

### Business Expense Deduction
**Legal principle:** An ordinary and necessary expense paid or incurred in carrying on a trade or business is deductible.

- **Case:** *Commissioner v. Olk*, 249 U.S. 174 (1919)
- **Citation:** 249 U.S. 174
- **Holding:** To qualify as a deductible business expense under §162, an expenditure must be: (1) ordinary (typical or common in the industry), and (2) necessary (directly related to carrying on the business). The inquiry is fact-intensive; what is ordinary and necessary depends on context and industry practice.

### Capital Expenditures vs. Deductible Expenses
- A capital expenditure acquires an asset with useful life > 1 year and is not deductible currently; it is capitalized and recovered via depreciation or amortization.
- **Authority:** IRC § 263; Treas. Reg. § 1.263(a)-1

### Depreciation and Amortization
- Depreciation of tangible property is deductible under §167(a); the annual deduction is determined under MACRS (Modified Accelerated Cost Recovery System) per §168.
- Amortization of intangible assets (purchased goodwill, patents) is deductible under §197 over 15 years.
- **Authority:** IRC §§ 167, 168, 197

### Investment Expense Deductions
- Expenses incurred in earning or collecting income, or in managing income-producing property, are deductible under §212 (e.g., investment advisory fees).
- **Authority:** IRC § 212

### Charitable Contributions
- Cash and property donations to qualified charitable organizations are deductible under §170(a).
- Deduction is limited to a percentage of adjusted gross income (e.g., 60% for cash, 30%–50% for appreciated property depending on recipient and property type).
- **Authority:** IRC § 170

### Loss Deductions
- Losses from casualty, theft, or business/investment activities are deductible under §165, subject to limitations.
- Casualty losses are deductible only if they exceed $100 per event and in aggregate exceed 10% of AGI (§165(h)).
- **Authority:** IRC § 165

### Tax-Benefit Rule
**Legal principle:** If a deduction was claimed in a prior year and the tax benefit was received, and in the current year the item is recovered or the obligation is satisfied, the recovery is includible in gross income to the extent of the prior-year tax benefit.

- **Case:** *United States v. Bliss Dairy, Inc.*, 460 U.S. 370 (1983)
- **Citation:** 460 U.S. 370
- **Holding:** The tax-benefit rule requires inclusion in gross income of recovered amounts to the extent a tax benefit was derived from the deduction in the prior year. The rule prevents double benefit and ensures consistency across years.

### Claim-of-Right Doctrine
**Legal principle:** If income is received under a claim of right (even if later shown to belong to another), it is included in gross income in the year of receipt.

- **Case:** *North American Oil Consolidated v. Burnet*, 286 U.S. 417 (1932)
- **Citation:** 286 U.S. 417
- **Holding:** Income received in good faith, without restriction, under claim of legal right is taxable in the year received, even if the taxpayer is later required to repay it. If the repayment obligation is disputed and the taxpayer has dominion over the funds without contingency, tax is due in the year of receipt.

### Above-the-Line vs. Below-the-Line Deductions
- Above-the-line deductions (IRC § 62) reduce gross income to adjusted gross income (AGI) and are allowed regardless of itemization.
- Below-the-line deductions (itemized or standard deduction, per § 63) reduce AGI to taxable income and are subject to limits and the choice between itemization or standard deduction.
- **Authority:** IRC §§ 62, 63

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## V. Capital Gains and Losses

### Capital Asset Definition and Exclusions
**Legal principle:** A capital asset is property held for investment or personal use, excluding inventory, accounts receivable, depreciable property, and real property used in business.

- **Case:** *United States v. Cottage Savings Ass'n*, 499 U.S. 554 (1991)
- **Citation:** 499 U.S. 554
- **Holding:** In a §1031 like-kind exchange, even if the properties exchanged are not identical (e.g., mortgage-backed securities of different pools), the exchange may qualify for deferral if the properties are substantially similar in economic substance and use. Capital asset status depends on the nature of the asset in the taxpayer's hands, not the form of the transaction.

### Sale-or-Exchange Requirement
- A disposition results in capital gain/loss only if there is a "sale or other disposition" of a capital asset.
- Ordinary business liquidations and certain forced dispositions (foreclosure, abandonment) may qualify.
- **Authority:** IRC § 1001

### Holding Period: Short-Term vs. Long-Term
- Short-term capital gains: holding period ≤ 1 year (ordinary income rates apply).
- Long-term capital gains: holding period > 1 year (preferential rates apply).
- **Authority:** IRC §§ 1022, 1223

### Preferential Rates on Long-Term Capital Gains
- Long-term capital gains are taxed at 0%, 15%, or 20% (as of 2026) depending on taxpayer's ordinary income bracket.
- **Authority:** IRC § 1(h)

### Section 1231 Assets and Netting
**Legal principle:** §1231 property (real or depreciable business property held > 1 year) receives capital gain treatment on net gains but ordinary loss treatment on net losses.

- Gains and losses from §1231 assets are netted separately.
- If net §1231 gain, the gain is treated as long-term capital gain.
- If net §1231 loss, the loss is treated as ordinary loss.
- **Authority:** IRC § 1231

### Depreciation Recapture
**Legal principle:** To prevent deductible depreciation from creating capital gains, depreciation is "recaptured" and treated as ordinary income.

- Under §1245 (personal property), all depreciation is recaptured as ordinary income up to the gain realized.
- Under §1250 (real property), unrecaptured §1250 gain (excess depreciation over straight-line) is taxed at 25% (a preferential but non-capital-gain rate).
- **Authority:** IRC §§ 1245, 1250

### Capital Loss Limitations and Carryovers
- Capital losses offset capital gains.
- Excess capital losses offset up to $3,000 of ordinary income per year (individuals per §1211(b)).
- Excess capital losses carry forward indefinitely to future years.
- **Authority:** IRC § 1211

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## VI. Special Property Transactions

### Like-Kind Exchanges (§1031)
**Legal principle:** If property held for business/investment use is exchanged for property of like-kind, the gain is deferred (not recognized).

- Basis in the new property is the basis of the old property (adjusted for boot paid/received).
- Real property exchanges (land for land) qualify. Personal property exchanges require goods within the same general asset class post-2017 (TCJA narrowed §1031 to real property for most exchanges).
- **Authority:** IRC § 1031; TCJA 2017 amendments

### Involuntary Conversions (§1033)
- If property is destroyed, taken by condemnation, or involuntarily converted, the taxpayer may elect to defer gain if replacement property is purchased within a specified period.
- **Authority:** IRC § 1033

### Installment Sales (§453)
- Gain on an installment sale is recognized over the years payments are received, using the gross-profit ratio (gain ÷ amount realized).
- **Authority:** IRC § 453

### Disposition of Debt-Encumbered Property
**Legal principle:** When property encumbered by a mortgage is disposed of, the liability is treated as part of amount realized (potentially creating boot or gain).

- **Case:** *Crane v. Commissioner*, 331 U.S. 1 (1947)
- **Citation:** 331 U.S. 1
- **Holding:** The full amount of a recourse liability encumbering property is included in amount realized, regardless of whether the taxpayer is personally liable. If the liability exceeds adjusted basis, gain results. This establishes basis for leveraged real estate transactions.

- **Case:** *Commissioner v. Tufts*, 461 U.S. 300 (1983)
- **Citation:** 461 U.S. 300
- **Holding:** Even if the liability exceeds fair market value of the property (recourse or nonrecourse), the entire liability is included in amount realized. Debt relief generates gain measured by the excess of liability over basis, even if the property is "underwater."

### Transfers Incident to Divorce
- A transfer of property between spouses or former spouses, incident to divorce, is not a taxable event (§1041).
- No gain/loss is recognized; basis carries over.
- **Authority:** IRC § 1041

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## VII. Timing of Income and Deductions

### Annual Accounting Concept
- Tax liability is computed on a per-tax-year basis, and each year is treated separately.
- **Authority:** IRC § 441

### Cash Method Timing Rules
- Income is recognized when cash or cash equivalents are received.
- Deductions are recognized when cash is paid or accrued (for checks, when mailed).
- **Authority:** Treas. Reg. §§ 1.446-1, 1.461-1

### Accrual Method: All-Events Test
**Legal principle:** Under the accrual method, income is recognized when all events have occurred that fix the right to income and the amount is determinable. Deductions are recognized when all events have occurred that fix the obligation and the amount is determinable.

- **Case:** *United States v. General Dynamics Corp.*, 481 U.S. 239 (1987)
- **Citation:** 481 U.S. 239
- **Holding:** For accrual-method deductions, the "all-events" test requires that the fact of liability be determined and the amount be reasonably estimable. Contingent or uncertain liabilities do not satisfy the test merely because they are probable.

### Prepaid Income and Expenses
- Prepaid income is recognized in the year of receipt (deferral is permitted only in limited circumstances per §451(c) for certain advance payments).
- Prepaid business expenses may not be deducted; they must be capitalized and deducted when the benefit is realized.
- **Authority:** IRC § 451

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## VIII. Tax Credits and Alternative Minimum Tax

### Earned Income Tax Credit (§32)
- The EITC is a refundable credit for low- to moderate-income working individuals and families.
- **Authority:** IRC § 32

### Child Tax Credit (§24)
- Qualified dependents (children under 17) generate a credit of up to $2,000 per child (as of 2026; TCJA 2017 modified rates and phase-outs).
- **Authority:** IRC § 24

### Alternative Minimum Tax (§55)
- A parallel tax system applies a 26% or 28% rate to alternative minimum taxable income (AMTI), which adds back certain deductions (e.g., state income taxes, depreciable real property) and applies fewer exemptions.
- Taxpayers pay the greater of regular tax or AMT.
- **Authority:** IRC § 55

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## Key Landmark Cases Cited

1. **Commissioner v. Glenshaw Glass Co.**, 348 U.S. 426 (1955) — Broad §61 income definition
2. **Lucas v. Earl**, 281 U.S. 111 (1930) — Assignment of income doctrine
3. **Commissioner v. Duberstein**, 363 U.S. 278 (1960) — Gift vs. compensation
4. **Commissioner v. Olk**, 249 U.S. 174 (1919) — Ordinary and necessary business expense
5. **United States v. Bliss Dairy, Inc.**, 460 U.S. 370 (1983) — Tax-benefit rule
6. **North American Oil Consolidated v. Burnet**, 286 U.S. 417 (1932) — Claim-of-right doctrine
7. **United States v. Cottage Savings Ass'n**, 499 U.S. 554 (1991) — Like-kind property substance
8. **Crane v. Commissioner**, 331 U.S. 1 (1947) — Debt-encumbered property basis
9. **Commissioner v. Tufts**, 461 U.S. 300 (1983) — Recourse and nonrecourse liability in amount realized
10. **United States v. General Dynamics Corp.**, 481 U.S. 239 (1987) — Accrual-method all-events test

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End of Grounded Notes