Restricted Stock and 83(b): What Happens If You Miss the 30-Day Window

The 83(b) election has a 30-day deadline, and unlike almost every other date in the tax code, there is no extension, no reasonable-cause exception, and no discretionary relief for missing it. Founders and early employees hear this and often assume it’s advisor caution talking. It isn’t. Courts have upheld this deadline even when the delay was caused by an attorney’s mistake or the taxpayer’s own serious illness. If you hold restricted stock and haven’t filed yet, the calendar is the entire ballgame.

Table of Contents

• Key Takeaways
• What an 83(b) Election Does
• The 30-Day Rule
• A Worked Example of What’s at Stake
• The Catch: What Happens If You Miss It
• Filing It Right the First Time
• Putting It All Together
• Frequently Asked Questions

Key Takeaways

• An 83(b) election lets you pay tax on restricted stock at grant, based on grant-date value, instead of at vesting. For stock that’s expected to appreciate, that can mean a much smaller ordinary income number now in exchange for capital gains treatment later.
• The deadline is 30 calendar days after the transfer date, full stop. IRC 83(b)(2) and Treas. Reg. 1.83-2 set this as a hard statutory cutoff, counted in calendar days, not business days.
• There is no extension and no Section 9100 relief. Because Congress wrote the 30-day rule directly into the statute, the IRS has no regulatory authority to waive it — the relief valve that rescues many other missed elections simply doesn’t reach this one.
• Since July 2025, you can file electronically using Form 15620 through an IRS online account, in addition to the traditional mailed paper election. Convenience improved; the deadline did not move.
• Missing the window doesn’t cancel your tax bill — it just moves it, usually to a worse number. Absent a timely election, you’re taxed under the default rule at each vesting date, using the fair market value on that date, which is often higher than the grant-date value you missed locking in.

What an 83(b) election does

When you receive restricted stock — common for founders, early employees, and some equity grants tied to an 83(i) election context — the default rule under IRC 83(a) taxes you as the stock vests, not when you receive it. Each vesting tranche is taxed as ordinary income based on the stock’s fair market value on that specific vesting date.

An 83(b) election changes the trigger date. Instead of waiting for each future vesting event, you elect to be taxed now, on the value of the stock at grant, even though it’s still subject to forfeiture and vesting restrictions. If the stock is worth very little at grant — common for very early-stage founder or employee stock — the ordinary income hit can be small or even negligible. From that point forward, appreciation is tracked as capital gain, not ordinary income, and your long-term holding period starts running from the grant date rather than each future vest date. For a comparison of how this plays into different equity structures, see our guide on RSUs vs. RSAs.

The 30-day rule

Here’s the part that trips people up: the election must be filed with the IRS no later than 30 calendar days after the date of transfer — the grant date, not the date you signed paperwork or the date your cap table software sent you a reminder. IRC 83(b)(2) states the election must be made “not later than 30 days after the date of” the transfer, and Treas. Reg. 1.83-2 lays out the filing mechanics: a signed statement to the IRS service center where you file your return, containing specific information about the property, its value, and the amount paid.

Two features of this deadline matter more than people expect:

• It’s calendar days, including weekends and holidays — not the 30 business days some other tax deadlines use.
• If you file by mail, the IRC 7502 timely-mailing rule can treat the election as filed on the postmark date, which is why certified mail with a dated receipt has long been the standard way to document a paper filing.

A worked example of what’s at stake

Illustrative numbers only. Suppose a founder receives 800,000 shares of restricted stock at formation, when the company’s value is nominal — say $0.001 per share, or $800 total. If she files an 83(b) election within the 30-day window, she recognizes $800 of ordinary income today (potentially offset further by a nominal purchase price), and every dollar of future appreciation is tracked toward long-term capital gains once she meets the holding period.

Now suppose she misses the deadline. Two years later, when the first quarter of her shares vests, the company has raised a Series A and the common stock is worth $4.10 per share. That vesting tranche — 200,000 shares — is taxed as ordinary income at $4.10 per share, or $820,000, all at ordinary rates, all in the year it vests. The remaining tranches vest in later years, each taxed the same way at whatever the stock is worth on that date. The $800 election she could have filed became an $820,000-and-climbing ordinary income problem, entirely because of a missed 30-day window.

The catch: what happens if you miss it

This is the section that deserves the most honesty, because the answer disappoints almost everyone who asks it.

There is generally no remedy. Section 9100 relief, the regulatory mechanism that lets the IRS grant extensions for some missed elections, doesn’t reach deadlines created by statute — and the 83(b) deadline is written directly into the statute itself.

Courts have consistently declined to create exceptions. Reported cases have rejected late elections even where the delay was attributed to an attorney’s error or the taxpayer’s illness.

You default into taxation at vesting, on vesting-date value. As shown above, this can turn a small, plannable tax event into a large, unplannable one — especially for stock that’s appreciated meaningfully between grant and vest.

There’s no partial credit for “close.” Filing on day 31 carries the same consequence as never filing at all.

If you’ve missed the window, the practical next step isn’t finding a workaround — because for the deadline itself, none exists — it’s re-modeling your tax exposure under the default rule and planning around the ordinary income you’ll now recognize at each future vesting date, including whether adjustments to withholding or estimated payments are needed when those tranches vest.

Filing it right the first time

Given that there’s no second chance, the practical strategy is entirely about not missing the window in the first place:

• Calendar the deadline the day you receive the grant, not the day you get around to the paperwork — 30 calendar days from the transfer date, marked immediately.
• File as early as possible within the window, not on day 29, to leave room for any documentation issues.
• Use certified mail with a dated receipt if filing on paper, so you have proof of the postmark date under the IRC 7502 timely-mailing rule.
• Consider the new electronic option. Since July 2025, the IRS has offered Form 15620, an online submission through an IRS individual online account, as an alternative to mailing a paper election. It provides instant confirmation of receipt, which removes the uncertainty of mail-based proof. If you use it, the IRS still expects you to provide a copy to the company issuing the stock so it can report and withhold correctly — and the guidance is to pick one method (paper or electronic) rather than filing both, to avoid confusion.
• Keep a copy of everything — the election itself, proof of timely filing, and the valuation support for the fair market value you used — in your permanent tax records.

Anyone receiving founder shares, early employee restricted stock, or a comparable grant should treat this as a day-one action item, not a someday task. Our guide to startup shares and taxes and our RSU basics guide cover the broader landscape this decision sits inside.

How Harness helps

An 83(b) election is a small piece of paper attached to an unusually unforgiving deadline, and the value of the shares at grant, the purchase price, and the filing mechanics all need to be right the first time. This is exactly the kind of moment where a specialist advisor earns their fee — helping you value the grant correctly, prepare the election, and confirm it’s filed (and documented) within the window, before day 30 arrives. Harness connects founders and equity holders with tax advisors experienced in restricted stock and equity compensation timing.

Putting it all together

If you’ve just received restricted stock, or you’re advising someone who has, confirm three things immediately:

1. What is the exact transfer date, and what calendar date is 30 days from it?
2. Has the election been filed — by mail with certified, dated proof, or electronically via Form 15620 — well before that date?
3. Does the company have a copy, so it can report and withhold correctly going forward?

There’s no fourth question about extensions, because for this deadline, that question doesn’t have a useful answer.

Frequently Asked Questions

How many days do I have to file an 83(b) election? You have 30 calendar days from the date the restricted stock is transferred to you, per IRC 83(b)(2). This includes weekends and holidays — it is not 30 business days.

Can I get an extension if I miss the 83(b) deadline? Generally no. The deadline is set directly in the statute, so the IRS has no regulatory authority to grant an extension, and Section 9100 relief (used for some other missed elections) does not apply to statutory deadlines like this one.

What happens if I miss the 83(b) election window? You’re taxed under the default rule in IRC 83(a): each tranche of stock is taxed as ordinary income when it vests, based on the fair market value on that vesting date, rather than the (often much lower) value at grant.

Can I file my 83(b) election online now? Yes. Since July 2025, the IRS has offered Form 15620 for electronic submission through an individual IRS online account, in addition to the traditional mailed paper election. The 30-day deadline applies to both methods equally.

Do I need to attach my 83(b) election to my tax return? No. That requirement was eliminated for elections made after 2015. You still need to file the original election with the IRS within 30 days and keep your own copy, along with a copy to the company issuing the stock.

Does the 83(b) election apply to stock options, or only restricted stock? It applies to unvested property transferred to you, most commonly restricted stock (RSAs) or shares from an early stock option exercise. It generally does not apply to restricted stock units before they vest, since RSUs don’t involve a transfer of property until vesting. See our RSU vs. RSA comparison for how the two are treated differently.

Disclaimer:

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