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Short answer
An 83(b) election must reach the IRS within 30 days after the shares are transferred to you. There are no extensions and late elections are not allowed. You can file online with IRS Form 15620 through an IRS account, or mail a signed election, and give a copy to the company.
How this tool works
The tool counts 30 calendar days and moves the date to the next business day if it falls on a weekend or legal holiday. When you mail it, use certified mail and keep the receipt.
Related tools
Sources
- IRS: Form 15620, Section 83(b) Election (PDF)
- IRS: Publication 525 update for Section 83(b) elections
Updated October 30, 2026. General information, not legal or tax advice.
Questions founders ask
With vesting, you can be taxed as shares vest, at their value then. The election taxes you now, at today’s low value, instead.
It matters most if you pay, or may later pay, U.S. tax. Ask a tax adviser. The online option needs an IRS account, so founders without one usually mail it.
No. The 30-day deadline is strict.
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