The 83(b) Election: Making the 30-Day Window Count

Without an 83(b) election, restricted stock is taxed as it vests, with ordinary income equal to the fair market value of each tranche on its vesting date less anything you paid for it, and the capital gains holding period for each tranche only starts once it vests. With the election, you're taxed once, on the value at grant, which for early founder stock or a fresh option exercise is often close to nothing, and the capital gains holding period starts immediately for the entire grant. For stock that's expected to appreciate meaningfully before it fully vests, the difference between these two outcomes can be substantial, which is exactly why the filing deadline gets treated as seriously as it does.

The window runs from the date the restricted stock is actually transferred to you, typically the grant date or an early exercise date, not from any later date connected to your annual tax return. There's no mechanism to request an extension, and reasonable cause arguments that work for other IRS deadlines generally don't apply here; courts and the IRS have treated this as a strict, unforgiving deadline. Mark the actual transfer date the moment it happens, and count thirty calendar days from there, not thirty business days.

Mail the signed election to the IRS service center where you'd file your individual tax return, and provide a copy to the company that issued the stock, since the company needs it for its own records even though it isn't the one filing it on your behalf. You are no longer required to attach a copy of the election to your Form 1040 for the year, a requirement the IRS eliminated some years back, but keeping a copy with your own tax records for that year is still worth doing regardless. Confirm the correct mailing address for your situation before sending it, since the right service center depends on where you live and how you'll file your return that year.

Follow these steps inside the thirty-day window:

1. Confirm the exact date the restricted stock was transferred to you, since the entire window is measured from that day.
2. Sign the election and mail it to the IRS service center where you file your individual tax return, using certified mail with a return receipt.
3. Give a copy of the election to the company that issued the stock, so it has the document for its own records.
4. Keep the mailing receipt, the delivery confirmation and a copy of the election, because the IRS sends no acceptance notice.

If you mail the election, the IRS doesn't routinely send an acceptance notice, so your proof of mailing is your key evidence that you filed within the window; if you file online through the IRS website, save the confirmation you receive. Send it via certified mail with a return receipt, and keep both the certified mail receipt and the green return card, or its electronic equivalent, showing the date it was delivered. Some people also send a self-addressed stamped envelope with an extra copy for the IRS to date-stamp and return, though certified mail with proof of mailing is the more reliable standard practice on its own.

There's no cure. A late 83(b) election is simply not an election at all, and the default rule, taxation at each vesting date on the value at that time, applies as though you never tried to file one. If you're not certain whether a specific transfer date started the clock, or whether an early exercise counts as the transfer date for this purpose, get that answered before day thirty, not after, since there's no path back once the window closes. This is one of the few tax situations where asking the question a week too early costs you nothing, and asking it a week too late can cost you the entire point of filing at all.