Stock Option Advisor Match

83(b) Election Calculator — Early Exercise Decision Tool

The 83(b) election converts future ordinary income into long-term capital gains — potentially saving six figures in taxes on a successful pre-IPO company. This calculator models both scenarios so you can see the exact dollar difference.

30-day deadline: no exceptions. The 83(b) election must be filed with the IRS within 30 days of the early-exercise date. Mail to the IRS campus serving your area via certified mail, return receipt requested. Miss it by a day and the election is permanently unavailable — there is no late-filing relief under IRC § 83(b).

When an 83(b) election makes sense

Strong case for filing

  • Current 409A is close to the strike price (election costs little or nothing today)
  • You believe strongly in the company's upside (high expected appreciation)
  • You're in a high income-tax bracket (bigger ordinary → LTCG spread)
  • The company is QSBS-eligible — 83(b) starts the 5-year QSBS clock immediately
  • You have the cash to exercise today (strike × shares is affordable)
  • Vesting period is long (4 years) — more appreciation to convert to LTCG

Reasons to pause or skip

  • Current FMV significantly exceeds strike — you'd owe ordinary income tax on a large spread today, in cash
  • The company is high-risk and may fail before vesting — you lose the exercise cash AND can't recover the 83(b) tax paid
  • You're exercising ISOs — the 83(b) spread may trigger AMT this year (model with the ISO AMT calculator)
  • You'll be terminated before vesting and the company won't repurchase — risk of holding worthless unvested shares
  • Cash is tight — paying strike × shares now strains liquidity

How the 83(b) election works

Under IRC § 83, property received in connection with services (including restricted stock from early-exercised options) is taxed as ordinary income when it vests — not when you receive it. The vesting date is the tax event, and the taxable amount is the spread between FMV at vest and what you paid.

An 83(b) election under IRC § 83(b) moves that tax event to the date of receipt (exercise) instead of vesting. You pay ordinary income tax now on the current spread — which is often near zero if you exercise shortly after grant when the 409A is low. Future appreciation from that basis is then long-term capital gain once you've held for 12 months.

For ISOs specifically: the 83(b) election on early exercise means the shares are no longer treated as options — the AMT preference item is the spread at exercise, not at vesting. This can be favorable if you exercise early when the spread is small.

The QSBS connection

If your company is a qualified small business under IRC § 1202 (C-corp with under $75M in assets at issuance — OBBBA raised this from $50M in July 2025), early exercise with an 83(b) election starts the 5-year QSBS holding period at the exercise date rather than the vesting date. Under OBBBA tiered exclusion: 3 years held → 50% gain excluded; 4 years → 75%; 5 years → 100% (up to $15M per issuer — OBBBA raised the cap from $10M). For a pre-seed company with high upside, this can be the most valuable consequence of the 83(b) election — more valuable than the ordinary-vs-LTCG rate differential.

Related tools

Get your 83(b) decision modeled by a specialist

The 30-day window is unforgiving. A specialist advisor can model your exact numbers — current 409A, strike, income, state taxes, QSBS eligibility, and AMT exposure — before you commit. Free match, fee-only advisors only.

Sources

  1. IRC § 83 — Property Transferred in Connection with Performance of Services. 83(b) election and 30-day window.
  2. IRS — Section 83(b) Election guidance.
  3. IRS Rev. Proc. 2026 tax year adjustments — 2026 income brackets, standard deductions, LTCG thresholds.
  4. IRC § 1202 — Qualified Small Business Stock. OBBBA (July 2025): asset ceiling raised to $75M, exclusion cap raised to $15M, tiered exclusion added.