83(b) Election Deadline Missed: What to Do
Missed the 83(b) 30-day window? Options are limited—here's what founders actually do next and how to avoid compounding the mistake.
Realizing you missed the 83(b) deadline feels like dropping your phone face-down on concrete. You had one job in the first month of the company—mail a letter—and now you're facing tax on stock vesting at potentially much higher values.
Bad news first: there's no standard IRS procedure to late-file an 83(b) election. The 30-day rule is statutory for most purposes, and "I didn't know" rarely works. Good news: you're not out of options entirely, but they're narrower and often expensive.
What follows is what founders and tax lawyers actually consider after a miss. Every situation differs—get professional help immediately.
Confirm you actually missed it
Verify the transfer date on your stock purchase agreement—not incorporation date if they differ. Verify when the envelope would have had to be postmarked. Sometimes counsel filed on your behalf and you never got confirmation; track down proof before panicking.
If you're still inside 30 days but reading this on day 28, stop and mail today.
Tax consequences without 83(b)
Without an election, you recognize ordinary income as shares vest, equal to FMV at each vest date minus what you paid (often zero spread early, large spread later). A departing cofounder can owe tax on shares they can't sell.
If the company stays private for years, you might owe tax without liquidity—classic founder trap.
Potential paths forward
Some teams negotiate a repricing or exchange of unvested stock for new grants—legally sensitive, requires tax and legal advice, not always respected by the IRS if it's cosmetic. Canceling and re-granting may reset clocks only if done carefully and for valid reasons.
Private letter ruling requests to the IRS are theoretically possible and practically rare—costly and uncertain. Litigation over ambiguous transfer dates is edge-case territory.
More commonly, founders model future tax, plan for liquidity events, and use withholding or cashless exercise strategies where applicable on later equity types.
If you're raising or hiring
Investors may ask about 83(b) compliance in diligence. Missing elections for cofounders doesn't always kill deals but triggers uncomfortable disclosures and repricing conversations.
For new hires, don't repeat the mistake—automate 83(b) in your equity onboarding with Pulley/Carta checklists and counsel review.
Preventing the next miss
Build 83(b) into incorporation checklists alongside EIN and bank account setup. Use registered mail. Store receipts with corporate records.
If you're a solo founder, assign a trusted cofounder, counsel, or CPA to verify filing—not just you.
Key takeaways
- Late 83(b) elections generally aren't curable—verify the deadline and any proof of prior filing first.
- Without 83(b), you tax vesting spread as ordinary income— painful without liquidity.
- Fixes like re-grants are complex and fact-specific; don't DIY repricing.
- Automate 83(b) onboarding for every future equity grant.
This guide is for general education only and is not tax, legal, or accounting advice. Rules change, and your facts matter. Talk to a qualified professional before filing or making equity decisions.
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