Lock Low Taxes: 30 Day 83(b) Election Steps for U.S. Founders

File an 83(b) election within 30-day of receiving substantially nonvested shares if the grant-date fair market value is nominal and you expect to remain until your shares vest. Doing so locks in a low tax basis today and starts your capital-gains holding period immediately. Miss the window, and the choice disappears for good: there are no exceptions to the 30 day deadline.

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TL;DR:

• The election applies only to transferred restricted stock or shares acquired through early exercise; unexercised options and unvested RSUs do not qualify.
• Taxable income equals fair market value at transfer minus what you paid; future appreciation may qualify for capital gains treatment, with the holding period starting immediately.
• Count 30 days from the actual transfer, not your offer or start date; weekends and federal holidays move the deadline to the next business day.
• Submit Form 15620 or a compliant written statement to the IRS, send your employer a copy, and retain filing confirmation and valuation records.
• If you leave and forfeit unvested shares, transfer date income tax generally is not refunded; a capital loss may be limited to what you paid.

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Table of Contents

• What an 83(b) Election Is and When It Applies
• How an 83(b) Election Changes Your Tax Bill
• Risks and Pitfalls You Should Weigh First
• How to File Your 83(b) Election Step by Step
• Documenting a Defensible Fair Market Value
• A Tax Example: With and Without the Election
• When Filing an 83(b) Election Doesn’t Make Sense
• Your 83(b) Filing Checklist and Template Outline
• How Vora IQ Supports Your Equity Decision Process
• How an 83(b) Election Affects Fundraising and Your Cap Table
• If Your Stock Is Forfeited After You File
• Author Perspective: Practical Rules of Thumb for Founders
• Keep Your Equity Decisions Organized With Vora IQ
• FAQ
• Sources

What an 83(b) Election Is and When It Applies

Section 83(b) of the Internal Revenue Code gives you a choice: pay tax on restricted stock now, based on its value at transfer, instead of later as it vests. For a startup founder holding stock worth almost nothing on day one, that choice can mean the difference between a tiny tax bill today and a painful one down the road.

The election only works for actual shares you already own but haven’t fully earned, what the law calls “substantially nonvested property.” That covers founder restricted stock and shares from an early-exercised stock option. It does not cover an unexercised option or an RSU, since you don’t yet hold property to make the election on, a distinction Stripe’s filing guide spells out clearly.

You make the election using Form 15620, the IRS’s standardized Section 83(b) election form, or a written statement that meets the same requirements; for deeper reading on individual tax preparation and estimated tax guidance, see this tax and bookkeeping blog for small businesses.

• Qualifying property: restricted stock grants and shares from early-exercised options.
• Non-qualifying property: unexercised stock options and unvested RSUs.
• Filing vehicle: Form 15620 or an equivalent compliant written statement.

How an 83(b) Election Changes Your Tax Bill

Without the election, you owe ordinary income tax as your shares vest, on whatever they’re worth at each vesting date. For an early-stage startup, that value can climb fast if the company raises a new round or gains traction. With the election, you pay ordinary income tax once, upfront, on the fair market value at transfer minus anything you paid for the shares. If that value is close to zero, as it often is right after incorporation, your tax bill is close to zero too.

Making an 83(b) election allows you to pay income tax based on fair market value at transfer, so future appreciation is generally taxed as a capital gain instead of ordinary income, according to Morgan Stanley’s founder guide. That shift matters because long-term capital gains rates are usually well below ordinary income rates, and the clock on your holding period starts running from the transfer date rather than from each vesting date.

• Taxable amount at filing: FMV at transfer minus amount paid for the shares.
• Future appreciation: taxed as capital gain once you meet the holding period, instead of ordinary income at each vesting date.
• Early-exercised ISOs: an 83(b) election shifts the timing of ordinary income but does not rewrite the statutory ISO rules, so AMT exposure needs its own look from a qualified tax advisor.

If you’re early-exercising incentive stock options, loop in a tax professional before you file. The interaction between an 83(b) election and AMT can get complicated, and getting it wrong is an expensive mistake to find out about later.

Risks and Pitfalls You Should Weigh First

An 83(b) election is a bet, and like any bet, it can go the wrong way. Weigh these risks honestly before you file, not after.

• Forfeiture risk: if you leave before your shares vest and forfeit them, the tax you already paid on those shares generally isn’t refunded.
• Liquidity risk: you’re paying tax on paper value before you have any way to sell the stock, so confirm you can cover the bill in cash.
• Documentation gaps: you need clear evidence the shares were actually transferred to you, not just promised, since filing on unissued or unexercised options usually doesn’t hold up.
• Lost paperwork: an election with no proof of timely filing is a weak position if the IRS ever asks.

Pro Tip: Keep a dedicated folder, physical or digital, with your grant agreement, valuation notes, and filing proof together from day one. You will not want to hunt for these documents years later during a due diligence request or an audit.

The forfeiture risk deserves special attention for early employees who aren’t sure they’ll stay a full year. Filing makes sense when your conviction about staying is as strong as your conviction about the company’s upside.

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

Getting the mechanics right matters as much as deciding to file at all. Here’s the sequence.

1. Complete Form 15620 or draft a written statement that includes your name, address, and taxpayer ID; a description of the property; the date of transfer; the taxable year; the property’s fair market value at transfer; the amount you paid; and the required election language, matching the format laid out on the official Form 15620 PDF.
2. Count your 30 days from the date the property was transferred to you, not the date your offer letter was signed or the date you started working. If day 30 lands on a weekend or federal holiday, the deadline rolls to the next business day.
3. Choose your filing method. You can mail a signed copy by certified mail with return receipt to the IRS service center where you’ll file your income tax return, or, as of mid-2026, submit Form 15620 electronically through the IRS portal, which requires ID.me identity verification.
4. Give a copy to your employer, since Form 15620’s instructions require it and your company needs the record for its own reporting.
5. Keep every piece of proof: your certified-mail receipt, your electronic portal confirmation, and a full copy for your own tax files.

• Deadline: 30 calendar days from transfer, with a next-business-day extension for weekends and holidays.
• Filing routes: certified mail to the correct IRS service center, or electronic filing via the IRS portal.
• Required copies: one for the IRS, one for your employer, one for your own records.

Address details and current filing locations are listed on the IRS’s About Form 15620 page, which is worth checking each time you file since service center addresses can shift.

Documenting a Defensible Fair Market Value

Your entire election rests on one number: the fair market value of the shares at the moment they were transferred to you. That value is determined without regard to any restrictions that will lapse later, meaning you value the stock as if the vesting schedule didn’t exist. For a brand-new startup, that’s usually close to whatever a founder or early investor paid for common stock in the same period.

Build a paper trail while the ink is still fresh.

• A cap table snapshot from the transfer date, showing share count and price.
• Board minutes or resolutions approving the stock issuance.
• Any 409A valuation or third-party valuation memo in effect around that time.
• Financing term sheets or recent investor pricing, if any exist.
• Your purchase receipt or canceled check showing what you actually paid.

Pro Tip: If your company has raised a priced round recently, or if your common stock valuation and preferred price are starting to diverge, get a formal 409A valuation before you set your 83(b) number. It’s cheap insurance against an IRS challenge years later.

A Tax Example: With and Without the Election

Here’s a simplified illustration. Say a founder is issued 1,000,000 shares of restricted stock at $0.0001 par value, vesting over four years, when the common stock’s fair market value is $0.001 per share. These figures are illustrative only, not market data.

Filed on time, the founder’s taxable income at transfer is effectively zero, and the four-year holding period for long-term capital gains starts on the transfer date. Without the election, the same shares vesting later at a higher valuation could trigger a large ordinary income hit, assuming the company’s value has grown substantially by then. Always run your own numbers with a CPA, since real cap tables and valuations vary.

When Filing an 83(b) Election Doesn’t Make Sense

Filing isn’t automatically the right move for everyone who’s offered restricted stock. A few situations call for real caution, or a pass altogether.

• High grant-date FMV: if the stock is already worth a meaningful amount when transferred, you could owe real cash today for shares you might never fully vest into.
• High forfeiture odds: if you’re not confident you’ll stay through the vesting schedule, you risk paying tax on shares you’ll lose.
• Options and RSUs: filing on an unexercised option or unvested RSU is typically ineffective since you don’t hold transferred property yet, a point Stripe’s guide makes directly.
• Unclear valuation: if you can’t document a defensible FMV, you’re exposed if the IRS later disputes your number.

Your 83(b) Filing Checklist and Template Outline

Keep this close when the clock starts running.

1. Gather your grant documents: restricted stock purchase agreement, stock option exercise notice, or founder agreement.
2. Determine fair market value at the transfer date, documented with a 409A, board minutes, or recent financing data.
3. Prepare Form 15620 or an equivalent written statement with every required field filled in.
4. Mail it by certified mail with return receipt, or submit it electronically through the IRS portal.
5. Send a complete copy to your employer, as required.
6. File your own copy with your tax records and keep proof of timely submission.

A compliant statement, whether on Form 15620 or written out yourself, needs these elements:

Name, address, and taxpayer identification number Description of the property transferred Date of transfer and the taxable year for which the election is made Fair market value of the property at transfer Amount paid for the property, if any A statement that the election is being made under Section 83(b) of the Internal Revenue Code

When you mail your election, certified mail with return receipt is the standard way to prove you filed on time, since the IRS doesn’t send a confirmation back for paper filings.

How Vora IQ Supports Your Equity Decision Process

Tracking a 30 day deadline alongside everything else a new founder juggles is exactly the kind of task that falls through the cracks. We help you turn a scattered to-do list into a living roadmap with dates and documents attached.

• We build automated checklists and deadline reminders so your 83(b) filing window doesn’t get buried under product and fundraising work.
• We give you a single place to store grant documents, valuation notes, and filing proof instead of scattered folders and email threads.
• We’ve delivered unique roadmaps across industries, each one adapted to the founder’s actual situation rather than a generic template.

None of this replaces a CPA or tax attorney for the filing decision itself. Pair our organization tools with professional tax advice before you sign anything.

How an 83(b) Election Affects Fundraising and Your Cap Table

Investors doing diligence on an early-stage company will usually ask whether founders filed their 83(b) elections on time. A missed deadline doesn’t void your stock ownership, but it can leave a messy tax situation sitting on the company’s cap table story, one that a buttoned-up investor’s counsel will flag during term sheet negotiations.

A cleanly filed election also supports a clear capitalization table from the start. Because the shares are treated as fully owned for tax purposes from the transfer date, your equity position doesn’t carry the same vesting-related tax uncertainty that unelected restricted stock does. That clarity matters more as a company moves through seed and Series A rounds, when new investors want to understand exactly who owns what and under what terms.

Founders who skip the election sometimes face unpleasant surprises if the company’s valuation jumps between grant and full vesting, since each vesting tranche becomes a new taxable event measured against the then-current value. That can create friction around secondary sales, tender offers, or even routine board consents if a founder suddenly owes a large, unplanned tax bill tied to the company’s own success. Keeping the election current and documented removes one more variable from an already complicated fundraising process.

If Your Stock Is Forfeited After You File

Forfeiture is the scenario every founder hopes to avoid, and it’s worth understanding plainly rather than glossing over. If you file an 83(b) election and then leave before your shares vest, forfeiting the unvested portion back to the company, the income tax you already paid on those shares at transfer generally is not refunded.

The tax code treats the forfeiture as a separate event from the original election. You may be able to claim a capital loss limited to the amount you actually paid for the forfeited shares, but the ordinary income tax you paid based on the transfer-date fair market value typically isn’t recoverable. That asymmetry is the central risk of filing: you’re betting on your own tenure and the company’s trajectory at the same time.

There’s no automatic remedy built into the statute for this outcome, which is exactly why the forfeiture risk deserves serious weight before you file, not after. A founder confident about a multi-year commitment and a reasonable grant valuation is in a very different position than someone taking a short-term role with substantial unvested equity at a higher valuation. If you’re ever unsure how forfeiture would play out in your specific grant structure, that’s a conversation for a tax professional before you sign the election, not after a departure.

Author Perspective: Practical Rules of Thumb for Founders

Most founders overthink this decision. If your grant FMV is nominal and you genuinely plan to stay 12 months or more, file. The downside is small and the upside, locking in capital gains treatment on future growth, can be substantial if your company succeeds.

When you’re uncertain, document every number and every conversation, and get a CPA or tax attorney to sign off before the 30 days run out. There’s no appeal process for a missed deadline and no do-over for a bad valuation call. Treat this as a one-shot decision, because it is one.

— Khalel

Keep Your Equity Decisions Organized With Vora IQ

Filing deadlines don’t wait for you to finish fundraising or hiring, and an 83(b) election is unforgiving if a document goes missing or a date slips your mind. We give founders a structured way to track equity-related deadlines, store grant and valuation documents in one place, and keep a clear record ready for tax season or diligence.

Our platform works alongside your CPA or tax attorney, not instead of them, handling the organization so you can focus on the decision itself. If you want a clearer system for managing the paperwork that comes with building a company, visit Vora IQ to learn more or get started free.

This article is general information, not a substitute for advice from a qualified financial advisor. Consult a qualified financial professional about your own circumstances before acting on anything here.

FAQ

What is the deadline for filing an 83(b) election?

You must file your 83(b) election promptly after the date your restricted stock or early-exercised option shares were transferred to you; the IRS does not allow exceptions for missed deadlines. If day 30 falls on a weekend or federal holiday, the deadline moves to the next business day.

How do I file an 83(b) election form?

Complete Form 15620 or an equivalent written statement with your identifying information, a description of the property, the transfer date, fair market value, and amount paid, then send it to the IRS by certified mail with return receipt or file it electronically through the IRS portal using ID.me verification. Always send a copy to your employer and keep proof of filing for your records.

Can I file an 83(b) election on stock options or RSUs?

Generally no. The election applies only to actual transferred, substantially nonvested property such as restricted stock or shares from an early-exercised option, and filing on an unexercised option or unvested RSU is usually ineffective, as Stripe’s filing guide explains.

What happens if I file an 83(b) election and then forfeit my shares?

The ordinary income tax you paid at transfer is generally not refunded even though you lose the shares. You may be able to claim a limited capital loss based on what you paid for the forfeited stock, but the original tax payment itself typically is not recoverable.

Does an 83(b) election affect my Alternative Minimum Tax exposure?

It can, particularly for founders who early-exercise incentive stock options, since the election changes the timing of ordinary income recognition without altering the underlying ISO rules. Anyone exercising ISOs should review AMT exposure separately with a qualified tax advisor before filing.

Sources

• Form 15620, Section 83(b) Election (PDF)
• Update to the 2024 Publication 525 for Section 83(b) election
• What is an 83(b) Election? A Founder’s Guide | Morgan Stanley
• How to file an 83(b) tax election (Stripe resource)