You have 30 days from the day your founder shares are transferred to you. Miss that window by a single day and there is no extension, no appeal, and no do-over — the IRS will tax every vesting tranche of your stock as ordinary income at whatever the shares happen to be worth years from now. For a founder whose company takes off, that one missed piece of paper can mean paying tax on millions of dollars of value you never chose to realize.
The good news is that filing the election itself has never been easier. The IRS now lets you submit Form 15620 — the standardized 83(b) election form — electronically through your IRS Online Account, with immediate confirmation of receipt. Here is what the election does, when it makes sense, and how to file it correctly in 2026.
What an 83(b) Election Actually Does
When you receive stock "in connection with services" — founder shares, restricted stock for an early employee, advisor grants — Section 83 of the tax code is the default rule. If the stock is subject to vesting (a "substantial risk of forfeiture," in tax language), you generally do not owe tax when you receive it. Instead, you owe ordinary compensation income each time a tranche vests, measured on the spread between the fair market value at vesting and what you paid.
That sounds taxpayer-friendly until you run the numbers. Suppose you pay $0.001 per share for 1 million founder shares. If a tranche vests when the shares are worth $5 each, your ordinary-income spread on that tranche is $4.999 per share — and you owe tax even though you have not sold a single share and have no sale proceeds to pay the bill.
An 83(b) election flips the timing. It tells the IRS to measure your compensation income once, up front, on the transfer-date spread: fair market value at transfer minus what you paid. For founder stock bought at fair market value when the company is worth almost nothing, that spread can be zero. Later vesting then produces no further compensation income, later appreciation is generally capital gain when you sell, and your capital-gain holding period starts just after transfer rather than after each vesting date.
The election changes tax treatment only. It does not accelerate your vesting schedule, remove the company's repurchase rights, establish what the stock is worth, or guarantee any other tax treatment. The company's agreement with you stays exactly as written.
The 30-Day Deadline Has No Grace Period
This is the single most important sentence in this article: you must file within 30 days after the property is transferred, and there is no routine extension.
The clock starts when you acquire a beneficial ownership interest in the shares — a facts-and-circumstances question where the board approval, the stock purchase agreement, payment, and issuance conditions all matter. It is not necessarily the day the paperwork lands in your inbox, and a board resolution alone does not always complete the transfer. If there is any ambiguity about your transfer date, resolve it with company counsel immediately, not on day 28.
A few narrow timing rules exist, and none of them make the deadline discretionary:
- If day 30 falls on a Saturday, Sunday, or legal holiday, Section 7503 pushes the deadline to the next business day.
- 83(b) elections are among the acts eligible for postponement under IRS disaster-relief notices — but a specific notice must actually cover you and your deadline. The rule itself grants no relief.
- There is no private-letter-ruling process that routinely excuses a late election. Tax practitioners describe missed 83(b) filings as effectively unfixable, and restructuring the grant after the fact is not an automatic cure.
If you receive restricted stock, treat the election as a day-one task. File in the first week and the deadline stops being a source of stress.
Filing Online With Form 15620
For decades, 83(b) elections had to be mailed to the IRS office where you file your return — founders sprinting to the post office with certified mail on day 29 became a startup cliché. The IRS first released a standardized election form, Form 15620, in late 2024, and has since opened electronic filing: you can now complete and submit the form online through your IRS Online Account (verified through ID.me), and the IRS calls online submission its preferred method.
Before you start
Gather the facts the form needs: your taxpayer information, the property and share quantity, the transfer date, the taxable year, the restrictions on the stock, the fair market value at transfer, and the price you paid. Double-check the share count and every dollar amount — a per-share figure that looks trivial can be substantial across a large founder grant.
Set up and verify your IRS Online Account access well before the deadline. Identity verification can take time, and day 30 is the wrong moment to discover your account is not ready. An advisor can help you prepare the information, but you should review and complete the submission through your own account.
Submit and keep proof
Complete the form in the portal, review it, and submit. Saving or downloading a form without submitting it is not a filing. After a successful submission, save the confirmation message and a copy of the completed election.
Then deliver the required copies: give one to the person for whom the services are performed — in the typical direct company grant, that is the company — and keep one for yourself. If the service provider and the property transferee are different people, the transferee gets a copy too.
Use one filing route, not both. The IRS says to file either online or by mail, but not both, so do not routinely submit a duplicate paper election "just in case." If a submission fails or its status is uncertain near the deadline, get prompt professional advice rather than improvising.
Filing by mail still works
Paper filing remains permitted: complete and sign Form 15620 (or a written election satisfying Treasury Regulation Section 1.83-2 — the official form is convenient but voluntary) and mail it to the IRS office where you file your federal income tax return, as the instructions direct. Confirm the current address rather than assuming the company's address controls.
For paper filing, use a method that establishes timely mailing under Section 7502. The practical approach is USPS Certified Mail obtained at a retail counter, keeping the properly dated receipt alongside your signed election and a record of the destination address. A return receipt adds delivery evidence. Dropping an envelope in a collection box does not establish a same-day postmark, and if you use a private carrier, confirm it is a designated service sent to the correct IRS street address — not every overnight product qualifies.
Records to keep permanently
Retain the signed or submitted election, your submission or mailing evidence, the transfer documents, support for the value and price figures, and evidence that you delivered the required copies. You may need to prove a timely election years later during an audit or at exit.
When the Election Is Worth Considering
The classic case is founder restricted stock purchased at fair market value while the company is worth little: the taxable spread may be zero while substantial future appreciation is possible. The same analysis can matter for early employees, directors, advisors, and consultants receiving restricted stock, and for anyone who early-exercises options into restricted shares.
Focus on the transfer-date spread, not the purchase price. Buying $100,000 of stock at its $100,000 fair market value can produce a zero spread; receiving stock worth $100,000 for nothing can produce substantial compensation income. The amount you paid, the current value, the forfeiture terms, and the type of option all feed into the decision.
The Downside: Tax Paid Now Can Be Hard to Recover
The election is a bet that the stock will be worth more later, and bets can lose. If the election produces meaningful compensation income, you pay tax before the stock is liquid. If the shares later decline in value or you forfeit them by leaving, that early tax bill can sting.
Forfeiture does not reverse the income you included under the election. Any forfeiture loss is generally limited to what you paid for the stock minus what you receive on forfeiture — and if the company repurchases at your original purchase price, there may be no loss at all. A later sale below your tax basis is a different situation that can produce a capital loss, but that is cold comfort if you already paid ordinary income tax on value that evaporated.
Revoking an election requires IRS consent and is limited by the governing rules. Before filing, model the spread, your liquidity needs, and your forfeiture risk — how likely are you to stay through vesting? — rather than treating the election as automatic.
Two related points founders often miss:
- RSUs are different. A restricted stock unit is a promise to deliver property later; it ordinarily transfers no property at grant, so no 83(b) election is available. Fully vested stock generally needs no election either.
- Early-exercised ISOs and NSOs behave differently. For an NSO exercised early into restricted shares, a timely election generally measures ordinary income at transfer. For an ISO, which generally produces no regular-tax income at exercise, the election instead affects the AMT spread calculation — and it does not move the one-year and two-year qualifying-disposition clocks. Keep the two option types analytically separate.
Common Mistakes That Sink 83(b) Elections
Most failed elections fail for boring, preventable reasons:
- Missing the 30 days. Calendar the deadline the day you sign, and file in week one. "My lawyer was drafting it" is not a defense the statute recognizes.
- Using the wrong transfer date. The date on the paperwork you received last week may not be the transfer date. Confirm when beneficial ownership actually transferred.
- Filing with the wrong IRS office. Paper elections go to the office where you file your return, not necessarily where the company files. Confirm the address in the current instructions.
- No proof of mailing or submission. Without a certified-mail receipt or a submission confirmation, a timely election becomes very hard to prove years later.
- Forgetting the company copy. The election is not complete until the required copies are delivered. Send the company's copy and keep a record that you did.
- Assuming someone else handled it. The company, its lawyers, and your advisor may all assume someone else filed. The obligation — and the consequence — is yours. Verify.
How This Fits Your Startup's Books
An 83(b) election is a personal tax filing, but its inputs live in your company's records: the 409A valuation supporting fair market value, the board consent authorizing issuance, the stock purchase agreement, the cap table, and the vesting schedule. Sloppy equity records do not just complicate the election — they compound at every financing, where new investors will ask for exactly this paper trail during diligence.
Keep a permanent equity file for each grant: the signed agreements, the valuation memo, the election and its proof of filing, and the delivery receipts. If you track your startup's finances in plain-text accounting, these documents sit naturally alongside your ledger in version control — every figure traceable, every record timestamped, nothing locked in a portal you might lose access to.
Keep Your Startup Finances Organized From Day One
As you handle founder equity, valuations, and tax elections, maintaining clear financial records is essential — the same documentation discipline that protects an 83(b) election protects every financing and tax filing that follows. Beancount.io provides plain-text accounting that gives you complete transparency and control over your financial data — no black boxes, no vendor lock-in. Get started for free and see why developers and finance professionals are switching to plain-text accounting.
