#equity-instruments
Understanding stock, SAFE notes, convertible notes, and startup financing structures
Form 15620 can now be submitted through an IRS Online Account, but the 83(b) election's 30-day deadline still has no routine extension. How the election works, when it pays, how to file online or by certified mail, and the six mistakes that sink it.
RSUs are taxed as ordinary income on the vesting date, not at sale, and employers withhold a flat 22% on supplemental wages up to $1 million — leaving employees in the 32–37% brackets short by 10 to 15 percentage points each April. This guide covers double-trigger vesting at private startups, why no 83(b) election exists for RSUs, and the $0 cost-basis error on Form 1099-B that makes people pay tax twice on the same income.
California does not conform to Section 1202, so a QSBS gain that is 100% excluded federally is taxed in full at state rates up to 13.3% — a $4 million exit can leave a founder owing roughly $350,000–$450,000 to Sacramento. This guide covers the 2025 QSBS expansion's new three- and four-year tiers, why California repealed its own exclusion, the real math on graduated brackets and the 1% surcharge, and what an FTB residency audit demands from founders who move before selling.
Under ASC 718 as amended by ASU 2018-07, startup equity granted to consultants, advisors, and contractors is measured at grant-date fair value and expensed as services are received — not when cash moves. This guide covers scope decisions, option-pricing inputs and nonpublic-company practical expedients, service vs. performance vs. market vesting conditions, keeping book expense separate from tax reporting, a three-record monthly reconciliation, and the ASU 2025-04 change for customer awards effective after December 15, 2026.
A phantom stock plan grants key employees hypothetical units that track company value and settle in cash — no shares issued, no dilution, no voting rights. Payouts are ordinary income subject to FICA when paid, the employer deducts them in the same year, and cash-settled awards are liability awards remeasured at fair value each reporting period. Paying within 2½ months after the year units vest satisfies Section 409A's short-term deferral exemption; a two-to-three-participant plan typically costs $4,000–$10,000 to launch.
For 2026 the OBBBA resets AMT phaseout thresholds to $500,000 single and $1,000,000 joint and doubles the exemption clawback from 25 to 50 cents per dollar, so the same income that owed no AMT in 2025 can owe five figures next year. A guide to who is exposed, how to estimate your position, and five planning moves before year-end.
A profits interest lets an LLC or partnership grant a service provider real equity with no tax at grant or vesting under Rev. Proc. 93-27 and 2001-43 — provided the distribution hurdle equals fair market value at grant, the interest is held two years, and the recipient accepts K-1 partner status. Here is how the safe harbor works, how the hurdle math is set, and the six mistakes that break the tax-free treatment.
FASB's ASU 2025-07 adds an ASC 815 scope exception for non-exchange-traded contracts whose payoff depends on a party's own operations — ESG-linked interest rate step-downs, M&A earnouts, regulatory and product milestones, change-of-control triggers — and routes warrants received from customers through Topic 606 instead of derivative accounting. Effective for annual periods beginning after December 15, 2026, with early adoption permitted.
FASB's ASU 2024-04, mandatory for fiscal years beginning after December 15, 2025, defines a three-part test for whether settling a sweetened convertible-note conversion counts as an induced conversion (expense only the sweetener) or a debt extinguishment (gain or loss against carrying value) — a classification that can swing reported expense by hundreds of thousands of dollars on the same transaction.
On February 27, 2026, the Delaware Supreme Court's Rutledge v. Clearway ruling upheld the 2025 SB 21 amendments to DGCL Section 144, confirming a safe harbor for related-party deals — including founder bridge loans and insider SAFE participation — approved by disinterested directors or a majority-of-the-minority vote. Here's what founders must document to qualify.
FASB's ASU 2025-12 clarifies that a net loss does not automatically make options, warrants, and convertible notes antidilutive: companies must test the combined numerator-and-denominator effect, apply the fix retrospectively to all prior periods presented, and adopt it for annual periods beginning after December 15, 2026.
FASB's ASU 2026-01 requires PIK dividends on equity-classified preferred stock to be measured at the stated contractual rate — not fair value — effective for annual periods beginning after December 15, 2026, with early adoption permitted. Here's what venture-backed startups with PIK preferred provisions should do before their next audit.
