83(b) Election
An 83(b) election is the IRS filing under Section 83(b) that recognizes income at grant rather than at vesting. It must be filed within 30 days of receiving restricted stock or early-exercising stock options, locking in the (typically near-zero) grant-date fair market value for income-tax purposes and starting the long-term capital-gains holding period immediately. It is one of the highest-leverage tax moves in the startup playbook and one of the most-painful mistakes to miss.
The mechanic and the math:
- Without 83(b): as restricted stock vests, the recipient recognizes ordinary income on the spread between purchase price and fair market value at each vesting date. As the company's 409A climbs, the tax bill at each vesting event grows.
- With 83(b): the recipient recognizes income at grant on the spread between purchase price and fair market value at grant (usually zero at incorporation for founders). All subsequent appreciation is capital gain rather than ordinary income.
Concrete example: founder grants 1,000,000 shares of restricted stock at $0.0001/share (paid $100 total) on company formation when the 409A FMV is also $0.0001/share. The company raises a Series A two years later at $5/share, by which point 50% of the founder's stock has vested.
- With 83(b) filed: income recognized at grant = $0 (no spread). Tax owed: $0. Capital gains clock started at grant date.
- Without 83(b): income recognized at each vesting event = (FMV at vesting - purchase price) x shares vesting. By Series A, the FMV at vesting events is climbing from cents to dollars. Founder owes ordinary income tax on hundreds of thousands of dollars of "phantom income" over the four-year vesting period, with no cash from the company to pay it. This is the brutal scenario.
The 30-day deadline: the election must be filed (postmarked) within 30 days of grant. There is no retroactive remedy. Missing the deadline is permanent. The filing process: complete IRS Form 83(b) (or a properly formatted letter that includes the required information), mail to the IRS service center where the recipient files their tax return, send by certified mail with return receipt, keep copies in company and personal records, and include a copy with the recipient's tax return for that tax year. When 83(b) applies: restricted stock awards subject to a substantial risk of forfeiture (vesting), early-exercised stock options (unvested portion), and certain other equity grants where ownership transfers but vesting restrictions apply.
Ryan's Take
The 83(b) election is the single most important tax filing in the startup playbook. The 30-day window is unforgiving. The upside is enormous (start the capital gains clock at grant, start the QSBS five-year clock, avoid ordinary income tax on vesting appreciation). The downside of missing it is catastrophic (ordinary income tax on phantom income at each vesting event with no cash to pay it). The discipline that works: file at incorporation, file at every restricted stock grant, file at every early exercise, certified mail with return receipt every time, keep copies in three places (company records, personal records, with that year's tax return). If you're a founder reading this and you don't remember if you filed yours, find out today. The recovery options if you missed it are limited to none.
What founders get wrong: Missing the 30-day window because they didn't understand the mechanics at incorporation, or filing incorrectly (wrong service center, missing required information, no proof of mailing). There is no statutory remedy for a missed 83(b) deadline. The IRS will not accept late filings. The cost of getting it right: a stamp, an envelope, and a form. The cost of getting it wrong: six or seven figures in lifetime tax liability for many founders. Treat the 83(b) like a fire alarm: it gets handled the day stock is granted, not later.
Related: Restricted Stock · Founders Stock · Vesting · QSBS · Early Exercise
FAQ
What is an 83(b) election?
An IRS filing made within 30 days of receiving restricted stock (or exercising an unvested stock option) that elects to recognize income for tax purposes at grant or exercise rather than at vesting. Locks in the typically near-zero grant-date FMV for income-tax purposes and starts the long-term capital-gains holding period immediately.
Why is the 83(b) election so important for founders?
Because without it, founders owe ordinary income tax on the spread between FMV and purchase price at each vesting event as the 409A climbs. With 83(b) filed at incorporation when FMV is essentially zero, the founder pays $0 in income tax at grant and converts all subsequent appreciation to capital gains. The difference can be six or seven figures at exit.
What happens if I miss the 30-day deadline?
Nothing good. The 30-day deadline is statutory; there is no retroactive remedy. The IRS will not accept late filings. Founders who miss the deadline are stuck with ordinary income tax on vesting appreciation, often with no company cash available to pay it. The only "fix" is to plan around the future tax liability, which is expensive and limiting.
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