What Is a Section 83(b) Election for Startup Stock?
Equity that vests over years creates an odd tax puzzle: pay tax now while the stock is worth very little, or wait and risk paying tax later on a much bigger number.
The short answer
A Section 83(b) election lets someone who receives restricted stock subject to vesting choose to be taxed on its value at the time of grant, rather than waiting until it vests. Filing the election shifts the ordinary income event — and the start of the holding period for later capital gains treatment — to a point when the stock’s value, and therefore the tax bill, may be very small. The tradeoff is that the tax is paid upfront on stock that isn’t fully owned yet and that could later lose all its value.
How restricted stock is normally taxed
Without an election, someone receiving restricted stock that vests over time is generally taxed as each portion vests, based on the stock’s fair market value at each vesting date. That’s a different tax treatment than the capital gains rules that apply once stock is eventually sold. For a startup, this can create a ballooning income problem if the company grows quickly, since equity that would have been taxed for pennies at grant might vest years later at a valuation many times higher, all while the stock may remain illiquid and hard to sell to cover the tax bill.
What the election changes
Filing the 83(b) election moves the timing: the recipient elects to include the value of the entire grant as ordinary income right away, at grant, rather than as it vests. If the value at grant is low — as it often is for very early startup stock — the ordinary income recognized can be small, and the clock for long-term versus short-term capital gains treatment on future appreciation starts running immediately rather than at each future vesting date.
The filing deadline is unforgiving
The election has to be filed with the IRS within a strict window after the stock grant, and it generally cannot be filed late or reversed once the window closes. This is one of the more rigid deadlines in the tax code, and missing it means falling back to the standard vesting-based taxation with no second chance to elect. Because of that, people considering the election typically need to act quickly after receiving a grant rather than treating it as something to decide later.
The real risk being taken
The core tradeoff is that tax is paid upfront on stock the recipient doesn’t yet fully own, based on the assumption that the company will succeed. If the recipient leaves before the stock vests, or if the company fails and the stock becomes worthless, the tax already paid isn’t automatically refunded. In some situations a loss on worthless stock may later be claimed as a capital loss, but that doesn’t fully offset the cash already spent on a tax bill for stock that never delivered value. It’s a bet that has to be evaluated against the specific company and grant, not treated as automatically worthwhile.
What to weigh
The election tends to make the most sense when the grant is small in dollar value, the stock’s fair market value at grant is genuinely low, and the recipient expects to stay long enough to vest. It tends to matter less, or work against the recipient, when the grant is already valuable at the time it’s offered. Because equity compensation rules and elections carry real deadlines and depend on individual circumstances, this is a decision that benefits from being made with full information rather than after the fact.