The 83(b) Election: The 30-Day Deadline That Can Cost Founders Millions

Few startup mistakes are as simple, or as costly, as missing an 83(b) election. It is a one-page filing with the IRS, due within 30 days, that can determine whether a founder pays tax on almost nothing today or on a large, rising value for years to come. Miss the deadline and, in most cases, there is no way to fix it.

This guide explains what an 83(b) election is, why it matters so much for founders and early employees, how to file it and what happens if you miss it.

1. Why the Election Exists

Founders usually receive shares subject to vesting. If a founder leaves early, the company can buy back unvested shares. See founder vesting and acceleration.

Under US tax rules, stock subject to vesting is generally taxed as it vests, based on its value at each vesting date. If the company's value rises, the founder owes ordinary income tax on that higher value every time shares vest, even though they cannot sell the shares to pay the tax.

An 83(b) election lets the founder choose to be taxed on the full value of the shares when they are granted instead of as they vest.

2. Why It Can Save So Much

• Tax at the lowest value. At formation, shares are often worth very little. Paying tax on that tiny value, or none if the founder paid fair market value, is far better than paying on higher values later.
• No tax as shares vest. Future appreciation is not taxed as ordinary income at vesting.
• Capital gains clock starts earlier. The holding period for long-term capital gains begins at grant, not at each vesting date.
• Supports QSBS planning. Filing an 83(b) is commonly recommended to help establish holding periods relevant to the QSBS exclusion. See QSBS explained.

3. A Simple Example

A founder receives 1,000,000 shares worth $0.001 each, paying $1,000, with four-year vesting.

• With an 83(b) election: the founder paid fair market value, so there is no taxable income at grant, and no ordinary income tax as shares vest.
• Without an election: if the company raises money and the shares are worth $1.00 each when a quarter of them vest, the founder could owe ordinary income tax on about $250,000 of value that year, with no cash from the shares to pay it.

4. How to File

1. File within 30 days of the date the shares are granted or transferred. There are no extensions.
2. Send the election to the IRS office where you file your return. The IRS has introduced a standard form (Form 15620) and has been expanding electronic filing options; check the current process with your adviser.
3. Keep proof of filing, such as certified mail receipts or electronic confirmation.
4. Give a copy to the company, which needs it for its records.
5. Confirm with your tax adviser whether any state filings are needed.

5. When It Applies

• Founder stock subject to vesting.
• Restricted stock grants to early employees or advisers.
• Early exercise of stock options, where unvested option shares are exercised and an 83(b) is filed. See ISOs vs. NSOs.

6. The Risks of Filing

• Tax paid upfront if shares are worth more than you paid for them.
• No refund if you forfeit unvested shares. If you leave early, tax already paid is generally not recoverable.
• The company may fail, making any upfront tax a loss.

For most founders receiving shares at formation, these risks are small because the value is tiny.

7. What If You Miss the Deadline?

In most cases, the election cannot be filed late. Options are limited and depend on circumstances, and some approaches, such as restructuring the grant, can be complex and costly. Speak to a tax adviser immediately. Investors often check for 83(b) elections during diligence, so missing ones can also raise questions. See due diligence red flags.

Frequently Asked Questions

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

30 days from the date of the grant or transfer of the shares, with no extensions.

Do I need to file if my shares vest immediately?

Generally no, because the election applies to shares subject to vesting or other restrictions.

Do I get the tax back if I leave before vesting?

Generally no. Tax paid on forfeited shares is usually not refundable.

Should every founder file?

Most founders receiving vesting shares at formation benefit from filing, but individual circumstances vary. Take tax advice.

The Bottom Line

An 83(b) election is a simple filing with enormous consequences. Founders and early employees receiving restricted stock should file within 30 days, keep proof, and give a copy to the company. Missing it can mean paying tax on value you cannot sell, often at the worst possible time.

Global Capital Network connects founders with investors and advisers through our events and investor network. Get in touch to learn more.

This article is general information, not tax or legal advice. Filing procedures change; consult a qualified tax adviser before and after receiving restricted stock.