The 83(b) Election: What It Is, How to File It, and Why Missing the 30-Day Deadline Is Permanent

Why Restricted Stock Gets Taxed at Vesting — and Why That's Expensive

When a startup grants you restricted stock — shares subject to a vesting schedule — the IRS does not care when you received them. It cares when you can keep them. Under IRC § 83(a), property transferred in connection with the performance of services is taxable as ordinary income in the first year in which the recipient's rights are either transferable or no longer subject to a substantial risk of forfeiture. The tax event is not the grant date. It is the moment the restriction lifts.

A vesting schedule creates exactly that risk of forfeiture. Under § 83(c), your rights to property are subject to a substantial risk of forfeiture when full enjoyment is conditioned on the future performance of substantial services — meaning, if you leave before your shares vest, you forfeit them. Each tranche that vests is treated as a separate taxable event. The IRS looks at the fair market value of those shares on the date the restriction lapses, subtracts whatever you paid for them, and treats the difference as ordinary compensation income — taxed at rates that currently top out at 37%, plus self-employment or payroll taxes.

For most employees receiving stock options, this structure is merely inconvenient. For startup founders, it can be catastrophic. Consider a founder who pays $0.0001 per share for 1,000,000 shares at formation — a total cost of $100. If the company's stock is worth $0.05 per share by the first anniversary vesting cliff, the founder has just received taxable ordinary income of roughly $50,000 on that tranche alone, despite having sold nothing and received no cash. Multiply that by four years of vesting as the company's valuation climbs, and the cumulative tax exposure can reach six figures from equity the founder may not be able to sell for years, if ever.

This is not an edge case or a planning failure unique to unsophisticated founders. It is the statutory default — what happens when a founder does nothing. The § 83(b) election exists precisely to override it, but only if filed within 30 days of the original grant date. Understanding the default rule is what makes the deadline matter.

The 83(b) Election: How One Form Changes the Tax Outcome

The election authorized by IRC § 83(b) does one simple thing: it lets you opt out of the default rule before it runs. Instead of waiting for each vesting tranche to become taxable — when shares may be worth far more — you elect to recognize income immediately, at the fair market value on the date of the original grant. For a founding-stage company whose shares are valued at a fraction of a cent, "immediately" means the tax bill is close to zero. The difference in outcome is not marginal. It is often the difference between a tax obligation measured in hundreds of dollars and one measured in hundreds of thousands.

A concrete illustration makes this tangible. Under analysis published by Davis Wright Tremaine, a founder whose shares grow to $4 per share over a four-year vesting period faces two very different tax paths. With an 83(b) election filed at grant, ordinary income tax at grant totals roughly $17,500. Without the election, the same founder pays approximately $743,750 in ordinary income tax across four years of vesting events as the share value climbs. That $726,250 gap is not the result of aggressive tax avoidance. It is the straightforward consequence of choosing when the taxable event occurs.

The mechanics behind the savings come from two sources that compound each other. First, the election eliminates the vesting-event problem by collapsing all future vesting tranches into a single taxable event at grant, when fair market value is lowest. Second — and this is the more durable advantage — IRC § 1223(6) provides that the holding period for long-term capital gains treatment begins at the date of transfer, not the date of vesting. That means a founder who files the election and holds for more than one year from the grant date converts every dollar of future appreciation from ordinary income (taxed at rates up to 37%) into long-term capital gain (capped at 20%). On a meaningful exit, that rate differential alone can represent tens of millions of dollars.

To see how extreme that differential can get, consider the following illustrative scenario: a founder receiving four million shares at $0.0001 per share, a total cost of $400. Without an 83(b) election, the same founder would owe ordinary income tax — potentially at the 37% marginal rate — on roughly $80 million in appreciation as shares vest at later, higher valuations. With the election, the founder pays a few dollars in tax at grant and the entire $80 million gain qualifies for long-term capital gains treatment. The election does not change the underlying economics of the company. It changes which column of the tax code the gains land in.

The election is not without a genuine downside. If you file an 83(b) election and then leave the company before your shares fully vest, the unvested shares are forfeited — and the IRS does not refund the income tax you already paid on them. You recognized income for property you no longer own, with no offsetting deduction. For most early-stage founders operating under standard four-year vesting with a one-year cliff, the probability of full forfeiture is a known risk they accept in exchange for locking in the tax treatment on the shares they expect to keep. The calculus shifts for founders with meaningful forfeiture risk — which is one reason the 83(b) decision should be made with full awareness of the vesting terms, not as a formality at signing.

For a founder who files correctly and stays with the company through a successful exit, the 83(b) election is among the highest-return legal actions available at formation — measured not by what it costs, but by the tax exposure it eliminates before it accrues.

The 30-Day Window: When the Clock Starts and What 'Timely' Means

Under Treas. Reg. § 1.83-2, the election must be filed "not later than 30 days after the date the property was transferred." That phrase — date the property was transferred — is the source of most filing failures. The clock does not start when you sign documents, when the company is formed, or when your vesting schedule begins. It starts when the board approves the grant.

That distinction matters because the board approval date and the date you receive paperwork are almost never the same. If the board approves your grant on March 1 but the documents do not reach you until March 15, your 30-day window has already consumed 14 of its 30 days by the time you even know you have stock to file on. When document dates conflict — and they frequently do, between the purchase agreement, the cap table, and the board consent — the board consent controls. The grant date is Day 0; the clock begins on Day 1, the following calendar day.

Before filing, pull your 83(b) election form and cross-reference it against the board consent date, not the date printed on your stock purchase agreement. If those dates differ by even a day, you are filing against the wrong deadline.

One final trap: how you mail the election has changed. Under USPS rule changes effective in late 2025, mail is postmarked when it is processed at a facility, not when it is dropped in a collection box. Dropping a paper election in a blue mailbox on Day 30 no longer guarantees a Day 30 postmark. File electronically if your IRS Submission Processing Center accepts electronic submissions, or take the envelope to a retail post office counter and request a manual postmark before you leave.

How to File Your 83(b) Election: Step by Step

The IRS released Form 15620 in November 2024 as the standardized vehicle for filing an 83(b) election. You can still use a compliant written statement instead, but Form 15620 is the cleaner path — and it is what the IRS now expects to see. Either way, the substantive requirements are the same: under Treas. Reg. § 1.83-2(e), your election must include your name, address, and taxpayer identification number; a description of the transferred property; the date of transfer and the taxable year for which the election is made; the nature of the restrictions subject to lapse; the fair market value of the property determined without regard to any lapse restriction; the amount paid for the property (which may be zero); and a statement that you have furnished copies as required.

Form 15620 satisfies those requirements across nine boxes. One of those boxes is a signature under penalty of perjury — an unsigned election is invalid and will be treated as if no election was made. Sign and date before you send anything.

For filing method, you have two options. The first is certified mail to the IRS Service Center where you file your federal income tax return. Certified mail with return receipt requested is not bureaucratic formality — it is your only evidence of timely submission, because the IRS sends no acknowledgment of receipt. The dated postmark on your certified mail receipt is the proof that protects you if the IRS ever questions whether you filed within the 30-day window.

The second option, available since mid-2025, is the IRS online portal using Form 15620 and an ID.me account. The portal generates a submission confirmation that serves the same evidentiary function as a certified mail receipt. Use only one filing method — submitting by both mail and portal creates duplicates and confusion. If you file via portal, you must still provide a copy to the company or other property issuer. The portal had documented limitations at launch — including caps on share quantities and decimal precision for per-share FMV figures — that were subsequently addressed in a 2025 update. If you filed in the earliest months the portal was available, confirm your submission was accepted without truncation errors.

On copies: furnish one to the company (or whoever transferred the property to you), keep one for your personal records, and if you file a joint tax return, each spouse needs a copy. These are not optional — the required-contents checklist under Treas. Reg. § 1.83-2(e) includes a statement confirming you furnished them.

If You Missed the Deadline: What Actually Happens

Missing the 30-day window is not a procedural inconvenience — it is a permanent foreclosure. Revenue Procedure 2012-29 eliminated the IRS procedure for obtaining relief to file a late § 83(b) election, and the agency has reinforced that position in individual private letter rulings, including PLR 201438006 (note: PLRs bind only the requesting taxpayer and are not precedential), where the Service declined to grant an extension and stated plainly that the 30-day period is absolute. There is no grace period, no private ruling path available to ordinary founders, and no petition that restores what the statute took away the moment Day 31 arrived.

What fills that void is § 83(a)'s default rule, the same regime described earlier in this article as catastrophic in a rising-valuation company. Every vesting tranche — whether monthly or cliff — becomes ordinary income in the year it vests, measured at the stock's fair market value on the vesting date minus whatever you paid for it. At a company whose common stock was worth a fraction of a cent at grant but climbs to $2, $5, or $10 per share over a four-year schedule, each vesting event produces a real tax bill at marginal rates reaching 37 percent plus FICA, on income the founder has not and cannot immediately liquidate. The exposure accumulates with every tranche and compounds as the valuation rises — there is no single moment of reckoning, just an expanding liability that arrives on Schedule 1 each April.

Three mitigation paths exist, none of them clean. The first is negotiating with the company to accelerate vesting of shares already outstanding, collapsing future tranches into the present where the FMV gap may be smaller — a negotiation that requires board approval and careful securities law handling. The second is a stock repurchase and regrant: the company buys back the unvested shares at current FMV and reissues them, at which point the founder can file a timely § 83(b) election on the newly granted shares. This restarts the clock, but it carries its own costs — a new 409A valuation is required, and if FMV has risen since the original grant, the repurchase itself may trigger compensation income and raise securities disclosure issues. The third option, where equity has not yet been granted, is to shift prospective grants to incentive stock options rather than restricted stock. Under IRC § 421, ISOs are not subject to § 83(a) at grant or vesting — the § 83(b) regime applies to property transfers, not option grants — so future equity awards can be structured to avoid the problem going forward. Note that ISOs carry their own tax considerations, including alternative minimum tax (AMT) exposure and disqualifying disposition rules, that require separate evaluation. ISOs also address only future grants; they do not remedy a missed § 83(b) election on restricted stock already held.

Where none of those paths are viable, the remaining option is to accept the exposure and plan around it. Working with a CPA to model estimated tax payments across each vesting event prevents the most acute version of the problem — a surprise bill at year-end that exceeds available cash — even if it does not eliminate the underlying liability. None of this is as good as having filed on time.

Founders who discover the miss in the weeks immediately following grant are in the best position to evaluate these options, because no vesting events have yet accumulated and no ordinary income has yet been recognized. That window of relative flexibility closes with every tranche that vests. Waiting months or years before seeking advice does not improve any of the available outcomes — it narrows them. If you are uncertain whether a filing was made, or if you received restricted stock recently and have not confirmed the election was timely submitted, the right move is to consult counsel now, not at the next vesting date.