Founder 83(b) Deadline Complete Your Tax Checklist

The 83(b) Election Checklist for Founders (Don't Miss the 30-Day Rule)

last updated: Mar 27, 2026
The IRS does not care about your excuses, your lost mail, or your busy schedule. You have exactly 30 days from your stock grant date to file this paperwork, or you will face a catastrophic tax bill when your company actually becomes valuable. It is a completely unforced error — here is exactly what you need to do.

TL;DR

An 83(b) election checklist provides the exact logistical steps to notify the IRS that you choose to be taxed on your unvested equity at grant rather than vesting.

  • Benchmark: Founders should mail their election within 10 to 15 days of the grant date to ensure a safety buffer.
  • Rule: Always use USPS Certified Mail with a Return Receipt requested.
  • Warning: The IRS has zero discretion to extend the 30-day window for late filings.

Glossary

  • 83(b) election: A provision under the Internal Revenue Code that allows founders and early employees to pay ordinary income tax on the fair market value of unvested shares at the time of grant.
  • Grant date: The exact date the board approves your stock issuance, which officially starts your 30-day filing countdown.
  • USPS Certified Mail: The only mailing method that provides the legally defensible proof of delivery you need to fight the IRS if they happen to lose your paperwork.

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How to file an 83(b) election

The Asset
Follow this rigid 8-step checklist. Consult your CPA before mailing anything.

  • Verify the grant date. Your 30-day clock starts the day after your stock is transferred. Do not guess this date. Check your board consent documents. If you need the broader context before filing, read my 83(b) election startup guide.
  • Draft the election document. Use the standard letter template provided by your legal counsel or use the newly released IRS Form 15620. Ensure it includes your name, address, social security number, and the exact number of shares.
  • Use this template if you lack counsel:
ELECTION UNDER SECTION 83(b) OF THE INTERNAL REVENUE CODE
The undersigned taxpayer hereby elects, pursuant to Section 83(b) of the Internal Revenue Code, to include in gross income the excess, if any, of the fair market value of the property described below over the amount paid for it.
1. Taxpayer name: [Name]
2. Address: [Address]
3. SSN: [SSN]
4. Property: [Number] shares of Common Stock...
  • Sign with a wet signature. Print the document and physically sign it with a pen. The IRS is notoriously picky about electronic signatures on paper filings, so a wet signature removes all doubt.
  • Prepare the required copies. You need 3 to 4 total copies. Keep one original for the IRS, one copy for your personal files, one copy to keep with your tax return for that year, and one copy for your company records.
  • Create the return envelope. Put a self-addressed, stamped envelope inside your mailing package. Include a brief cover letter asking the IRS to date-stamp your copy and mail it back to you.
  • Mail via USPS Certified Mail. Go physically to the post office. Send the package via USPS Certified Mail with a Return Receipt requested. Keep the green tracking slip like it is a winning lottery ticket.
  • Distribute the final copies. Send a PDF scan of your signed election and your Certified Mail receipt to your co-founders, your lawyer, and whoever manages your company capitalization table. You can learn more about managing equity in my cap table founder FAQ.

Benchmarks

Sample math: Assume you are granted 1,000,000 to 2,000,000 shares at a nominal value of $0.0001 per share. Your tax liability at grant is based on a $100 to $200 valuation. If you miss the deadline and your company reaches a $10,000,000 to $15,000,000 valuation when those shares vest, you could owe ordinary income tax on millions of dollars of phantom income without having the cash to pay it.

83(b) election vs standard vesting

With standard vesting, you pay taxes as your shares vest based on their value at that exact time. If your startup grows, your tax bill skyrockets. With an 83(b) election, you pay taxes upfront on the day of the grant based on a near-zero valuation, locking in capital gains treatment for future growth.

Risks

The main risk of filing an 83(b) election is that you pay tax on shares that may eventually become worthless if your company fails. However, since the initial valuation of a startup is usually nominal, this upfront tax cost is negligible compared to the massive risk of missing the 30-day window and facing astronomical ordinary income taxes later.

Will filing your 83(b) election get you to $10K MRR?

Mastering your 83(b) election is necessary, but paperwork does not build a business. Tactics without a solid strategy are nothing when you are trying to hit your first $10,000 monthly recurring revenue (MRR). Fix your foundation and build a product people actually want to buy using Traction OS.
FAQ
  • You:
    Can I file my 83(b) election electronically?
    Guide:
    The standard method has historically been paper mailing. While the IRS recently introduced Form 15620 which opens up some electronic options for specific tax software, most founders still rely on paper filing via USPS Certified Mail to guarantee they get a physical date-stamped receipt.
  • You:
    What happens if I miss the 30-day deadline by one day?
    Guide:
    You lose the ability to make the election entirely. The IRS provides absolutely no grace period for this specific tax filing. You will be taxed at ordinary income rates as your shares vest over the next 3 to 4 years.
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