The 83(b) election is one of the most consequential tax decisions a startup founder or employee will ever make — and it has to be made within 30 days.
If you receive restricted stock in a startup — whether as a founder, early employee, or advisor — you face a choice that will determine how (and how much) you are taxed on that equity for years to come. File an 83(b) election in time, and you can potentially save hundreds of thousands of dollars. Miss the deadline or skip it entirely, and you may end up paying ordinary income tax on stock that has appreciated dramatically by the time it vests.
This guide covers everything you need to know: what the 83(b) election is, when and why to file one, the new IRS Form 15620 and electronic filing option, common mistakes, and how the election interacts with QSBS, ISOs, and other key startup tax concepts.
In This Guide
- What Is Section 83 and Why Does It Matter?
- What Is an 83(b) Election?
- Who Should File an 83(b) Election?
- When You Should Not File an 83(b) Election
- How to File: IRS Form 15620 and the New E-Filing Option
- The 30-Day Deadline — And What Happens If You Miss It
- 83(b) Elections and Stock Options: ISOs, NSOs, and Early Exercise
- 83(b) Elections and QSBS (Section 1202)
- Common Mistakes and How to Avoid Them
- Real-World Scenarios
- Frequently Asked Questions
01 — What Is Section 83 and Why Does It Matter?
Section 83 of the Internal Revenue Code is the provision that governs the taxation of property — including stock — transferred in connection with the performance of services.
Here is the core rule: when you receive property (like stock) for services, and that property is subject to a "substantial risk of forfeiture" (i.e., vesting), you are not taxed when you receive it. Instead, you are taxed later, when the risk of forfeiture lapses — in other words, when each tranche of stock vests.
At that point, you owe ordinary income tax on the difference between what you paid for the stock (if anything) and the fair market value of the stock at the time of vesting.
For a startup founder who paid $0.001 per share on Day One, and whose stock is worth $5.00 per share three years later when it vests, this default rule is punishing. You would owe ordinary income tax on $4.999 per share — potentially on tens of thousands or hundreds of thousands of shares — at vesting. And you would owe that tax even though you have not sold a single share and may have no cash with which to pay the tax bill.
This is the problem the 83(b) election solves.
→ The Tax Problem at the Heart of Equity Compensation
02 — What Is an 83(b) Election?
An 83(b) election is a filing you make with the IRS that says, in effect: "Tax me now on the full value of this stock — including the unvested shares — rather than taxing me later as the shares vest."
By making this election within 30 days of receiving restricted stock, you choose to recognize the income (if any) at the time of grant, based on the stock's current fair market value, rather than waiting until vesting.
Why this matters in practice: If you are a founder who just incorporated a company and received restricted stock at a fraction of a penny per share, the income you recognize by filing the 83(b) election may be zero — or close to it. Then, as the company grows and the stock appreciates, all of that appreciation is taxed as capital gain (assuming you hold the stock for at least one year after grant and two years after option grant, if applicable) rather than as ordinary income.
Without the election, every vesting event is a taxable event at ordinary income rates — potentially 37% federal plus state taxes — on stock you may not be able to sell.
The tradeoff: The 83(b) election is not a free lunch. You are prepaying tax on stock you might forfeit. If you leave the company before your stock fully vests, you lose the unvested shares — and you do not get a refund of the tax you paid on them. (You may be able to claim a capital loss, but that is a cold consolation.)
→ Restricted Stock & the 83(b) Election
03 — Who Should File an 83(b) Election?
The 83(b) election is most valuable — and most commonly filed — in these situations:
Startup founders receiving restricted stock at incorporation. This is the classic case. You form the company, issue yourself founder shares at a nominal price (often $0.0001 to $0.001 per share), and those shares are subject to a vesting schedule (typically four years). The current fair market value is negligible, so the tax on filing the 83(b) election is essentially zero. The upside protection is enormous.
Early employees receiving restricted stock awards (RSAs). Some startups grant actual shares of stock (not options) to early hires, subject to vesting. If the company is still early-stage and the stock price is low, filing an 83(b) election locks in that low value for tax purposes.
Anyone who early-exercises stock options. Some stock option plans allow you to exercise your options before they vest — known as "early exercise." When you do this, you receive restricted stock (shares that are still subject to a vesting schedule and a right of repurchase). The 83(b) election is critical here, because without it, you will be taxed at ordinary income rates on each vesting date based on the spread at that time.
Advisors and consultants receiving equity grants. If you receive restricted stock for advisory or consulting services, the same Section 83 rules apply.
Practice Note: The 83(b) election does not apply to Restricted Stock Units (RSUs). RSUs are a promise to deliver stock in the future — no property is transferred at grant, so there is nothing to elect on. This is one of the most common sources of confusion. If you receive RSUs, the 83(b) election is not available to you.
04 — When You Should Not File an 83(b) Election
The election is not always the right call. Consider the risks before filing:
When you paid significant money for the stock and the company might fail. If you exercised options and paid a meaningful amount for shares in a company whose future is uncertain, you are betting that the stock will be worth more at vesting than it is today. If the company fails, you lose both the stock and the tax benefit — you prepaid tax on something that became worthless.
When you are likely to leave the company before vesting. If you forfeit unvested shares, you do not get back the taxes you paid when you filed the 83(b) election. You can claim a capital loss, but you cannot claim a deduction for the ordinary income you recognized.
When the current fair market value is already high. If you are joining a later-stage company and receiving restricted stock at a non-trivial fair market value, the upfront tax bill from an 83(b) election could be significant — and the appreciation between now and vesting may not justify the risk.
When you received RSUs. As noted above, RSUs are not eligible for an 83(b) election. If you mistakenly file one, it has no legal effect, but it can create confusion in company records.
Key Principle: The 83(b) election is most powerful when (a) the current value is low, (b) you expect significant appreciation, and (c) you are confident you will stay through vesting.
05 — How to File: IRS Form 15620 and the New E-Filing Option
For decades, the 83(b) election required drafting a letter based on the model language in Revenue Procedure 2012-29 and mailing it to the IRS via certified mail. That process was error-prone — letters got lost, certified mail receipts were misplaced, and there was no way to confirm the IRS received your filing.
That changed in late 2024, when the IRS released Form 15620 — the first official, standardized form for making a Section 83(b) election. And in July 2025, the IRS opened an electronic filing portal for Form 15620, allowing taxpayers to submit their election online for the first time.
How to File Electronically (Recommended)
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Go to the IRS e-filing portal and sign in with your ID.me account (the IRS's identity verification platform). If you don't have an ID.me account, you will need to create one — plan ahead, as identity verification can take a day or two.
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Complete Form 15620 online. The form asks for your name, Social Security number, the date the property was transferred, a description of the property, the fair market value at the time of transfer, the amount you paid, and the name and address of the person from whom the property was transferred.
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Submit electronically. You will receive a confirmation from the IRS, and you can download or print a copy of the filed form.
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Provide a copy to your employer or the issuer of the stock. This is still required — the electronic filing does not replace the obligation to give a copy to the company.
If You Prefer to File by Mail
You can still download Form 15620 from the IRS website, complete it, and mail it to the IRS. If you go this route, send it by certified mail with a return receipt requested so you have proof of timely filing.
The 30-Day Trap: Whether you file electronically or by mail, the deadline is absolute: within 30 days of the date the property is transferred to you. The IRS does not grant extensions, and courts have uniformly refused to excuse late filings. Set a calendar reminder the day you receive restricted stock.
→ Stock Option Plan Administration: A Guide
06 — The 30-Day Deadline — And What Happens If You Miss It
This deserves its own section because the consequences are severe and the deadline is unforgiving.
The rule: The 83(b) election must be filed with the IRS no later than 30 days after the date the property is transferred to you. "Transferred" generally means the date the board of directors approves the grant — not the date you sign the paperwork, and not the date the shares appear in your cap table.
What happens if you miss the deadline? There is no cure. You cannot file a late 83(b) election. The IRS will not grant relief, and courts have consistently rejected requests for extensions or equitable exceptions. If you miss the 30-day window, you are locked into the default treatment under Section 83(a): taxation at ordinary income rates at each vesting date.
What "filing" means: For paper filings, the election is considered filed on the date it is mailed (not the date the IRS receives it), which is why certified mail is so important. For electronic filings, the election is filed when you receive confirmation of submission.
Practical tip: Do not wait until Day 29. File as soon as possible after receiving your restricted stock grant. Many startup lawyers advise founders to file within the first week.
Practice Note: If you are a startup founder and your co-founder missed the 83(b) deadline, this is a serious issue. Consult with a tax advisor immediately to understand the implications and plan accordingly. There may be restructuring options, but they are complex and situation-dependent.
07 — 83(b) Elections and Stock Options: ISOs, NSOs, and Early Exercise
The 83(b) election most directly applies to restricted stock — shares that have been issued to you but are subject to vesting. But it also comes into play with stock options in specific circumstances.
Standard Option Exercise (No 83(b) Needed)
If you exercise a stock option after it has vested, you receive unrestricted stock. There is no substantial risk of forfeiture, so Section 83(b) does not apply. (You may still owe tax on the spread at exercise, depending on whether the option is an ISO or NSO, but that is a different analysis.)
Early Exercise of Options (83(b) Is Critical)
Some startup stock option plans include an "early exercise" provision that allows you to exercise options before they vest. When you early-exercise, you pay the exercise price and receive actual shares — but those shares remain subject to the company's right to repurchase any unvested shares if you leave. That repurchase right is a "substantial risk of forfeiture," which means Section 83 applies.
If you early-exercise and do not file an 83(b) election, you will be taxed at ordinary income rates as each tranche of stock vests — based on the spread between your exercise price and the fair market value at each vesting date.
If you early-exercise and do file an 83(b) election within 30 days, you recognize income (if any) based on the spread at the time of exercise. For early-stage companies where the exercise price equals the current FMV, this often means zero tax at the time of filing.
ISOs and the 83(b) Election
For Incentive Stock Options (ISOs), the 83(b) election interacts with the Alternative Minimum Tax (AMT). When you exercise an ISO and file an 83(b) election, the spread at exercise is an AMT preference item in the year of exercise (rather than being spread across vesting dates). This can be advantageous or disadvantageous depending on your overall AMT situation — consult a tax advisor.
→ The Complete Guide to Equity Compensation for Startups
08 — 83(b) Elections and QSBS (Section 1202)
Here is where the 83(b) election can unlock one of the most powerful tax benefits in the Internal Revenue Code: the exclusion of gain on Qualified Small Business Stock (QSBS) under Section 1202.
The connection: To qualify for the QSBS exclusion (which can shield up to $10 million or 10x your basis in gain from federal tax), you must hold the stock for at least five years. The holding period begins when you acquire the stock — and for restricted stock, the question is whether "acquisition" occurs at grant or at vesting.
Without an 83(b) election, your holding period for QSBS purposes does not begin until each tranche of stock vests. This means your four-year vesting schedule effectively pushes the start of your five-year QSBS clock back by up to four years for the last tranche to vest.
With an 83(b) election, your holding period begins at the date of grant. This means the five-year QSBS clock starts running immediately — even on unvested shares. For founders who plan to hold their stock long-term, this can be the difference between qualifying and not qualifying for the QSBS exclusion.
Practice Note: The interplay between 83(b) elections and QSBS is one of the strongest arguments for filing the election early. Even if the immediate tax savings are modest, starting the QSBS clock at grant can be worth millions in excluded gain down the road.
→ The Complete Guide to QSBS and Section 1202
09 — Common Mistakes and How to Avoid Them
Having worked with startup founders for over 25 years, I see the same 83(b) mistakes come up again and again. Here are the ones to watch for:
1. Missing the 30-day deadline. This is the most catastrophic and the most common. The deadline runs from the date of transfer (usually the board approval date), not the date you sign your stock purchase agreement. Set a reminder immediately.
2. Filing for RSUs. The 83(b) election does not apply to restricted stock units. Filing one for RSUs has no legal effect but creates administrative confusion. Make sure you understand whether you received restricted stock (actual shares, subject to vesting) or restricted stock units (a promise of future shares).
3. Forgetting to give a copy to the company. The regulations require that you provide a copy of the filed election to the transferor (your employer or the company that issued the stock). This is not optional — it is a filing requirement.
4. Not keeping proof of filing. If you file by mail, use certified mail and retain the receipt. If you file electronically, download the confirmation. Years later, if the IRS questions your election, you will need to prove you filed on time.
5. Failing to report on your tax return. You should attach a copy of the 83(b) election to your federal income tax return for the year in which the transfer occurred. While the IRS has stated that failure to attach the election to your return does not invalidate it (as long as you filed it with the IRS on time), it is best practice to include it.
6. Not considering the downside. The 83(b) election is irrevocable (absent IRS consent, which is almost never granted). If you file the election, pay tax on the stock's value, and then forfeit the stock because you leave the company, you do not get a refund of the tax paid. You may claim a capital loss, but that is limited in its utility.
7. Not consulting a tax advisor. The election itself is simple. The decision of whether to file one — given your specific tax situation, AMT exposure, state tax implications, and QSBS eligibility — is not. A short conversation with a CPA or tax attorney before filing can save you from costly mistakes.
10 — Real-World Scenarios
Scenario 1: The Founder at Incorporation
Sarah co-founds a Delaware C-corporation. The company issues her 2,000,000 shares of common stock at $0.0001 per share, subject to a four-year vesting schedule with a one-year cliff. She pays $200 for her shares.
The fair market value of the stock at incorporation is $0.0001 per share. Sarah files an 83(b) election within 30 days.
Tax at filing: $0 (she paid fair market value).
Three years later, the company raises a Series A that values the common stock at $2.00 per share. Sarah's shares are now worth $4,000,000. Because she filed the 83(b) election, none of that appreciation has been taxed. When she eventually sells (assuming she holds long enough), the gain will be taxed as long-term capital gain — and may qualify for the QSBS exclusion.
Without the 83(b) election: Sarah would owe ordinary income tax on each vesting tranche, based on the FMV at each vesting date. On the shares that vest in Year 3 (when FMV is $2.00), she would owe ordinary income tax on the $2.00 spread — potentially hundreds of thousands of dollars — on stock she has not sold and may not be able to sell.
Scenario 2: The Early Employee Who Early-Exercises
James joins a Series Seed startup and receives an option to purchase 100,000 shares at $0.10/share. The plan allows early exercise. James early-exercises all 100,000 shares on Day One, paying $10,000. The shares are subject to a four-year vesting schedule.
The 409A fair market value at the time of exercise is $0.10/share. James files an 83(b) election.
Tax at filing: $0 (exercise price equals FMV).
QSBS clock starts immediately on all 100,000 shares.
Two years later, the company's FMV is $3.00/share. Without the election, James would owe ordinary income tax on $2.90/share as each tranche vests. With the election, he owes nothing until he sells — and the gain will be long-term capital gain.
Scenario 3: The Late-Stage Hire (When the Election May Not Make Sense)
Priya receives a restricted stock award of 50,000 shares at a company valued at $15.00/share. The stock is subject to a four-year vesting schedule. If Priya files an 83(b) election, she recognizes $750,000 in ordinary income immediately — and owes roughly $300,000 in taxes — on stock she might forfeit if she leaves.
In Priya's case, the 83(b) election may not be the right choice. The upfront tax cost is significant, the forfeiture risk is real, and the expected appreciation may not justify the risk. Priya should discuss this carefully with her tax advisor.
11 — Frequently Asked Questions
Can I revoke an 83(b) election after I file it?
Generally, no. The election is irrevocable without the consent of the IRS, and such consent is rarely granted. Think carefully before filing.
Does the 83(b) election apply to partnership interests or LLC membership interests?
Section 83 applies to "property transferred in connection with the performance of services." Whether a particular partnership or LLC interest constitutes "property" for this purpose is a complex area of tax law. In many cases, a profits interest in a partnership is not subject to Section 83 at all (under Rev. Proc. 93-27), so an 83(b) election is not necessary. However, a capital interest may be. Consult a tax advisor.
What if the company is an S-corporation?
The 83(b) election works the same way for S-corporation stock as it does for C-corporation stock. However, there are additional considerations around the S-corporation shareholder limits and the tax treatment of S-corporation income.
Do I need to file a state 83(b) election as well?
Most states follow the federal treatment, but some have their own rules or forms. Check with a tax advisor familiar with your state.
What if I file the 83(b) election and the company's value goes down?
You will have prepaid tax on a higher value than the stock is ultimately worth. If you eventually sell the stock for less than the value you reported, you can claim a capital loss. If you forfeit the stock entirely, you can claim a loss equal to the amount you paid for the stock (your basis), but you cannot deduct the income you previously recognized — that tax is gone.
Can I file an 83(b) election for stock I received as a gift?
No. The 83(b) election applies only to property received in connection with the performance of services.
Is the 83(b) election the same as an "early exercise"?
No. Early exercise is the act of exercising stock options before they vest. The 83(b) election is a tax filing you make after receiving restricted property (including property received through early exercise). They are related but distinct concepts.
Summary
The 83(b) election is one of the most important tax elections available to startup founders and employees. For those who receive restricted stock when the company's value is low, it offers the opportunity to convert what would otherwise be ordinary income into long-term capital gain — and to start the QSBS holding period clock at grant rather than at vesting.
But it is not automatic, and it is not forgiving. The 30-day deadline is absolute. The election is irrevocable. And the decision to file should be informed by your specific tax situation.
If you have received restricted stock or are about to, file the 83(b) election promptly — or consult with a tax advisor to make sure you are making the right decision. And if you need help thinking through the tax implications of your equity compensation, book a call.
This guide is for informational purposes only and does not constitute legal or tax advice. Consult a qualified attorney or tax advisor for advice specific to your situation.
Related Reading:
→ The Complete Guide to Equity Compensation for Startups
