Why founders should file the 83(b) election the week their stock is issued

If you've just bought restricted founder stock, you have 30 days to file an 83(b) election with the IRS. Thirty days sounds like plenty. In practice, mail delays, missing tax IDs, paperwork dated after the fact, and the rest of company formation all compete for that window, and the IRS does not extend it for any reason.

Founders should file the 83(b) election within the same week the stock is issued. At that point the paperwork is fresh, the value of the shares is close to zero, and there is room to fix a mistake before the deadline passes. Waiting gains nothing, because the election costs the same on day 3 as on day 29, and missing it can mean ordinary income tax on every vesting tranche for the next four years.

Below is what the election does, why the 30 days are shorter than they look, and how to file with proof that holds up in diligence.

The 83(b) election moves the tax to the day you buy the shares

Founder shares are usually subject to vesting: the company can buy back unvested shares if a founder leaves. Under Internal Revenue Code Section 83, stock subject to that kind of restriction is normally taxed as it vests, based on its value on each vesting date.

An 83(b) election tells the IRS to tax the shares at their value on the transfer date instead. For founders buying at a nominal price, such as $0.00001 per share, the purchase price and the fair market value are usually the same, so the taxable amount at transfer is zero.

Without the election. Each vesting tranche is taxed as ordinary income at its value on the vesting date. If the company raises a round in year two, the shares vesting after that are taxed at the new, higher value, whether or not the founder can sell them.

With the election. There is no tax as the shares vest. The founder's holding period for capital gains starts at the transfer date, and gain is taxed when the shares are sold. That start date also matters for the five-year holding period under Section 1202, the qualified small business stock exclusion.

The same logic applies to employees who early exercise options and receive unvested shares.

The 30 days are shorter than they look

The deadline is 30 calendar days from the date the shares are transferred. Weekends count. A board consent signed a week later, or a stock purchase agreement countersigned after the fact, does not move the start date. The only relief in the rules is that a deadline falling on a weekend or federal holiday moves to the next business day.

Several things tend to eat into the window.

Formation work competes for attention. The 83(b) comes due in the same weeks as the EIN application, bank account setup, bylaws, and the first board consents. It is the only one of those with a deadline that cannot be extended.

Paperwork arrives late. Founders often receive the executed stock purchase agreement days after the transfer date. The election needs the transfer date, number of shares, price paid, and fair market value, so a late agreement means a late start on the election.

Tax ID gaps stall non-US founders. A founder without a Social Security number or ITIN sometimes waits to obtain one before filing. The election can be filed without a US tax ID, with a note that the founder does not have one, and waiting for an ITIN almost always takes longer than 30 days.

Mail is slow, and foreign mail is riskier. The IRS treats a paper filing as filed on the postmark date only when it is sent through the US Postal Service or a designated private delivery service. A founder mailing from outside the US through a local postal service gets no such protection, and the election counts as filed only when the IRS receives it.

Filing in the first week leaves more than three weeks to catch a wrong address, a missing signature, or a lost envelope.

Proof of filing matters as much as the filing

The IRS does not confirm receipt of an 83(b) election on its own. Investors and acquirers routinely ask for proof during diligence, and a founder who cannot produce it has a problem that is hard to solve years later.

Send it trackably. Use USPS certified mail with a return receipt, or a designated private delivery service, and keep the receipt and tracking record.

Ask for a stamped copy. Include a second copy of the election and a self-addressed stamped envelope with a request that the IRS stamp and return it.

Give a copy to the company. The company keeps the election with its stock records. It is no longer necessary to attach a copy to your personal tax return.

Use the standard form. The IRS publishes Form 15620 for the election. A signed written statement containing the required information is also accepted.

Missing the deadline has no clean fix

There is no late filing option for an 83(b) election. Once the 30 days pass, the shares are taxed as they vest.

The workarounds available afterward all have costs. A company can cancel the original issuance and reissue new shares, restarting the 30-day window, but the new shares are issued at the company's value at that time, which may no longer be nominal. Removing or changing vesting affects the protections the other founders and investors rely on. Each option involves legal work and can raise questions in diligence.

Filing the same week avoids having to choose among them.

When the election does not apply

Fully vested shares. If founder shares are not subject to vesting or repurchase, there is nothing for the election to accelerate, and no 83(b) is needed.

Shares bought below fair market value. If a founder pays less than the shares are worth, the election triggers ordinary income tax on the difference at transfer. At formation that gap is usually zero or negligible, but later issuances should be priced carefully.

Forfeited shares. If a founder leaves and the company repurchases unvested shares, any tax paid under the election is not refunded. When the taxable amount at transfer was zero, there is nothing to lose.

How Inkle fits in

Inkle Incorporation assists with Delaware C-Corp incorporation.

The bottom line

The 83(b) election is one of the few founder decisions with no upside to waiting. The tax cost is fixed at the transfer date, usually at zero, and the deadline cannot be extended or cured. Filing within the same week the stock is issued turns a 30-day deadline into a three-week buffer for mail, tax ID, and paperwork problems, and it leaves time to get proof of filing in hand before anyone asks for it.

Frequently asked questions

When is the 83(b) election deadline?

Thirty calendar days after the date the shares are transferred to you. If the 30th day falls on a weekend or federal holiday, the deadline moves to the next business day. The IRS does not grant extensions.

Can I file an 83(b) election without an SSN or ITIN?

Yes. A founder without a US tax ID can file the election with a note that they do not have one. Waiting to get an ITIN before filing usually means missing the deadline.

Does mailing the 83(b) on day 30 count as filing on time?

Yes, if it is sent through the US Postal Service or a designated private delivery service and postmarked by the deadline. Mail sent through a foreign postal service counts as filed only when the IRS receives it.

How do I prove I filed my 83(b) election?

Send it by certified mail with a return receipt, keep the tracking record, and include a second copy with a self-addressed stamped envelope so the IRS can return a stamped copy. Give the company a copy for its stock records.

What happens if I miss the 83(b) deadline?

The shares are taxed as ordinary income as they vest, based on their value on each vesting date. There is no late election. Workarounds such as canceling and reissuing the shares restart the window but may be priced at a higher value.

Do I need an 83(b) election if my shares are fully vested?

No. The election only applies to shares subject to vesting or a substantial risk of forfeiture. Fully vested shares are taxed at transfer anyway.