#stock-basis
Track stock cost basis for accurate investment accounting
Lifetime gifts under IRC Section 1015 carry over the donor's basis, while inheritance under Section 1014 steps it up to fair market value at death — a difference that can shift a family's after-tax outcome by six figures on a single appreciated position under the 2026 $15 million federal exemption.
A practical guide to Section 302 stock redemptions in closely-held C corporations — when a buyback gets capital gain treatment versus dividend treatment, how Section 318 family attribution disqualifies most family redemptions, and how the four 302(b) tests plus the 302(c)(2) waiver preserve sale treatment.
Section 302 of the Internal Revenue Code decides whether a closely-held C corporation's stock redemption is taxed as a capital sale or a full-amount dividend. This guide explains the three Section 302(b) tests, the Section 318 attribution traps that ensnare family-owned companies, the 10-year family-attribution waiver, and the partial-liquidation safe harbor under Section 302(b)(4).
A practical guide to Section 1015 carryover basis versus Section 1014 stepped-up basis, the dual basis trap for depreciated assets, and the 2026 decision framework for whether to gift appreciated property now or hold until death under the permanent $15 million exemption.
How the Intentionally Defective Grantor Trust (IDGT) installment sale freezes estate value at today's AFR, why Revenue Ruling 2023-2 ended the basis-step-up shortcut for grantor trust assets, and the formalities that decide audit outcomes.
Exercising and holding ISOs adds the bargain element to AMTI on Form 6251 Line 2i, which can produce a six-figure tax bill before a single share is sold. A 2026 guide to the tightened AMT exemption phase-out ($500K single / $1M MFJ at 50¢ per dollar), the qualifying disposition rules under IRC §422, and the planning moves — AMT crossover exercise, §83(b) early exercise, same-year disqualifying sale, and multi-year laddering — that keep tech employees out of the trap.
Under OBBBA, the 2026 AMT exemption phases out at $500K single / $1M joint with a 50-cent rate, doubling the stealth bracket on ISO exercises. Here is exactly how the bargain element flows into Form 6251 line 2i, when a same-year disqualifying disposition eliminates the AMT adjustment, and how to plan exercises to avoid a six-figure phantom-income tax bill.
Section 1366(d) caps S-corporation loss deductions at stock basis plus direct shareholder debt, and Form 7203 is how the IRS verifies the math. A working guide to suspended losses, phantom capital gains on distributions, the $25,000 open-account debt rule, why personal guarantees do not create basis, and how the Regulation 1.1367-1 ordering rules decide which losses survive each year.
Section 1259 treats short-against-the-box trades, equity swaps, and tight collars on appreciated stock as constructive sales — taxable today, even with no proceeds. Covers the variable prepaid forward workaround, the 30-day closing exception, and the related-party trap.
Section 351 lets founders incorporate without immediate tax only if the transferor group owns 80% of voting power and every non-voting class right after the exchange. Miss the control test, contribute services instead of property, or assume liabilities greater than basis, and the gain surfaces anyway. A practical playbook covering boot, the Section 357(c) trap, basis carryover under Sections 358 and 362, and how to preserve QSBS eligibility under Section 1202.
Section 368 defines seven reorganization types (A through G) that defer corporate and shareholder tax in M&A. This guide covers the 40% Continuity of Interest test, Type A statutory mergers, Type B stock-for-stock swaps with the 80% control requirement, Type C asset deals, and forward/reverse triangular merger structures with their consideration limits.
Section 83(i) lets qualified rank-and-file employees at eligible private companies defer federal income tax on RSU vests and NSO exercises for up to five years, but FICA is still due at vesting, the 30-day election window is unforgiving, and the 80 percent broad-based grant rule keeps most startups from offering it.
