If you're a founder receiving restricted stock or an early employee getting equity in a startup, the 83(b) election is one of the most important tax decisions you'll ever make — and one of the easiest to miss. This guide covers everything you need to know: what the election is, when to file, how to file, and what happens if you don't.

What Is an 83(b) Election?

An 83(b) election is a provision under Section 83(b) of the Internal Revenue Code that allows you to pay taxes on the full fair market value of restricted stock at the time of grant, rather than when the shares vest.

By default, the IRS taxes restricted stock as ordinary income when it vests — based on whatever the stock is worth at that time. If your startup does well, that vesting event could trigger a massive tax bill on stock that's now worth far more than when you received it.

The 83(b) election flips this. You elect to be taxed at grant, when the shares are typically worth very little (or even nothing above the purchase price). Then, when you eventually sell after vesting, any appreciation is taxed at long-term capital gains rates — which are significantly lower than ordinary income rates for most taxpayers.

A Simple Example

Suppose you receive 1,000,000 founder shares at a $0.0001 par value when the company is worth essentially nothing. Your total taxable income at grant: $100. You file an 83(b) election and pay tax on that $100.

Four years later, after full vesting, the company is worth $10 million. Without the election, you'd pay ordinary income tax on $1,000,000 worth of shares vesting over that period. With the election, you've already paid taxes (on $100), and future appreciation qualifies for long-term capital gains treatment.

The difference can be hundreds of thousands of dollars.

Who Should File an 83(b) Election?

The 83(b) election applies specifically to restricted property — stock or equity that is subject to a substantial risk of forfeiture. This typically includes:

•Founder stock subject to vesting schedules
•Restricted stock awards (RSAs) granted to employees
•Partnership interests subject to vesting (e.g., LLC membership interests)

It does not apply to:

•Stock options (ISOs or NSOs) — the election applies when you exercise the option and receive shares, not at grant
•Stock appreciation rights (SARs)
•Phantom equity or cash-based plans
•Fully vested shares with no restrictions

If you're a co-founder and your shares are subject to a 4-year vesting schedule, filing an 83(b) election is almost always the right move.

The 30-Day Deadline: The Most Important Rule

The IRS requires you to file your 83(b) election within 30 days of the date you receive the restricted property. This is not 30 days from your vesting start date, not 30 days from when you sign your employment agreement — it's 30 days from the date of the actual grant or transfer.

Miss this window by even one day, and the election is invalid. The IRS will not grant extensions under ordinary circumstances.

This 30-day deadline is the reason so many founders and early employees end up with painful tax bills. A grant gets executed, paperwork gets buried in other closing activities, and suddenly the window has closed.

Mark this date on your calendar the moment you receive any restricted equity.

Tax Benefits of Filing

The 83(b) election offers several significant tax advantages:

1. Tax on (Usually) Zero or Low Value

At the founding stage, restricted stock is frequently purchased at par value (often $0.0001 per share). The taxable spread at grant is minimal or zero, meaning you recognize little to no ordinary income.

2. Long-Term Capital Gains Treatment

By making the election, your holding period for long-term capital gains starts at the date of grant — not at vesting. As long as you hold the shares for more than one year from the grant date, appreciation qualifies for long-term capital gains rates (0%, 15%, or 20% depending on income), rather than ordinary income rates (up to 37% federally).

3. Qualified Small Business Stock (QSBS) Clock

If your company qualifies as a Qualified Small Business under IRC Section 1202, the 83(b) election also starts the QSBS holding period clock at grant. QSBS exclusions can eliminate up to $10 million (or 10x your basis) in capital gains tax on the sale of qualifying stock — but only if you've held the stock for more than five years. Getting that clock started early matters enormously.

How to File an 83(b) Election: Step-by-Step

The filing process is straightforward but must be done correctly and within the deadline.

Step 1: Prepare the Election Statement

The election statement is a written document that must include:

•Your name, address, and Social Security Number (or taxpayer identification number)
•A description of the property received (e.g., "1,000,000 shares of Common Stock of XYZ Inc.")
•The date the property was transferred and the tax year
•The nature of any restrictions on the property
•The fair market value of the property at transfer (ignoring the vesting restriction)
•The amount you paid for the property
•A statement of the election you are making under IRC Section 83(b)

Your company's legal counsel or your startup attorney can provide a template. Many cap table management platforms, including OpenCap Stack, include 83(b) election templates as part of equity grant workflows.

Step 2: Sign and Date the Statement

The election must be signed by you (the taxpayer making the election). If the property was also transferred to a spouse, they may need to sign as well depending on your jurisdiction.

Step 3: File with the IRS

Mail the signed statement to the IRS Service Center where you will file your federal income tax return for the year. Use certified mail with return receipt — this creates a timestamped record of the filing, which can be critical if the IRS ever challenges whether you filed on time.

You should file:

•Within 30 days of the grant date (this is the legal requirement)
•Ideally within the first 2 weeks after grant, to avoid any risk of a postmark issue

Step 4: Send a Copy to Your Employer

You must also provide a copy of the 83(b) election to the company that issued the stock. They need it for their records and for accurate W-2 reporting at year-end.

Step 5: Keep a Copy for Your Tax Return

Attach a copy of the 83(b) election to your federal income tax return for the year in which the property was received. Keep the certified mail receipt and IRS confirmation permanently.

Common Mistakes That Can Invalidate Your Election

Missing the 30-Day Window

As noted above, this is by far the most common mistake. The IRS is strict: a late filing is simply not valid.

Filing with the Wrong IRS Service Center

The election must go to the IRS center that handles your return. This is based on your state of residence. Filing with the wrong center could result in the election being lost or not processed.

Failing to Keep Proof of Mailing

If the IRS later claims they never received the election, you need proof you sent it. Always use certified mail with return receipt requested.

Not Sending a Copy to the Company

Forgetting this step doesn't invalidate the election itself, but it can cause problems with your W-2 reporting and complicates your company's records.

Assuming Your Attorney Filed It

Some founders assume their attorney will handle this automatically. Unless you have explicit confirmation, don't assume. Always follow up directly to verify the filing was completed and mailed.

Filing for Non-Qualifying Property

The 83(b) election only applies to restricted property. Filing for stock options at the grant stage (rather than at exercise) is incorrect. If you're unsure whether your equity qualifies, consult a tax advisor.

What Happens If You Miss the Deadline?

If the 30-day window closes without a valid 83(b) election, the default IRS rules apply:

•Ordinary income tax at each vesting event: As your shares vest, you recognize ordinary income equal to the fair market value of the vested shares minus any amount you paid.
•No long-term capital gains head start: Your holding period for capital gains purposes starts at each vesting date, not the grant date.
•Potentially significant tax liability: If the company grows quickly, you could face substantial tax bills at each vesting milestone — on stock you can't easily sell to pay the taxes.

This situation — sometimes called "phantom income" — can create serious financial hardship for early employees who can't sell their shares to cover the tax bill.

The IRS has historically granted relief in very narrow circumstances (clerical errors, natural disasters), but the bar is extremely high. Don't count on it.

When the 83(b) Election Doesn't Make Sense

Despite its benefits, there are situations where filing an 83(b) election may not be optimal:

•High FMV at grant: If the shares already have significant value at the time of grant, filing means paying taxes on that value immediately. If the company then declines or you forfeit the shares, you've overpaid.
•High risk of forfeiture: If there's a substantial chance you'll leave before vesting (e.g., very early-stage, pre-product startup with uncertain future), paying taxes upfront may be risky.
•Already-vested shares: The election only applies to unvested, restricted property.

For most founders receiving restricted stock at or near founding when the company's value is minimal, the 83(b) election is almost always the right choice. The tax savings as the company grows are typically far larger than the small upfront tax cost.

83(b) Elections and Stock Options

A common point of confusion: the 83(b) election applies when you exercise an option and receive restricted shares, not at the option grant date itself.

For holders of Incentive Stock Options (ISOs), there's an additional consideration: early exercising (before vesting) and filing an 83(b) election can help minimize or avoid Alternative Minimum Tax (AMT) implications at exercise. This is a more complex strategy worth discussing with a tax advisor.

For Non-Qualified Stock Options (NSOs), the spread at exercise is always ordinary income regardless of the 83(b) election — the election matters for the post-exercise appreciation only.

Using Cap Table Software to Track 83(b) Elections

Modern cap table management platforms make it easier to track and manage 83(b) election status across your equity grants. Features to look for include:

•Automated 30-day deadline reminders
•83(b) election templates built into grant workflows
•Status tracking (pending, filed, expired)
•Secure document storage for filed elections

OpenCap Stack provides 83(b) election tracking as part of its equity grant management, so founders and HR teams can monitor which grants have pending elections and ensure none slip through the cracks.

Key Takeaways

File within 30 days of receiving restricted stock — no exceptions, no extensions
Use certified mail with return receipt to create proof of timely filing
Send a copy to your company and keep a copy for your tax return
For founders receiving low-value stock at company formation, the 83(b) election is almost always the right move
The election starts your capital gains holding period and your QSBS clock
Consult a tax advisor if you have any uncertainty about whether to file

The 83(b) election is one of those tax provisions that rewards preparation and punishes procrastination. If you're receiving equity in a startup, don't wait.

This article is for informational purposes only and does not constitute tax or legal advice. Consult a qualified tax professional or attorney for guidance specific to your situation.

The 83(b) Election: When to File, How to File, and What Happens If You Miss the Deadline