Section 83(b) Election for LLC Founders: The 30-Day Clock

What a Section 83(b) election does

Section 83(b) of the Internal Revenue Code lets a recipient of restricted equity elect to recognize the equity's value as ordinary income at grant, rather than waiting until the vesting restrictions lapse. The election shifts the tax timing forward to a moment when the equity is usually worth less, and shifts subsequent appreciation into capital-gains territory when the equity is later sold. The election is irrevocable once filed and cannot be revoked except in narrow circumstances permitted by the IRS.

The election was originally designed for restricted stock in a C-corp setting. The same Internal Revenue Code section applies to LLC interests granted with vesting, but the underlying entity type changes the analysis. An LLC taxed as a partnership grants profits interests and capital interests under different tax rules than a C-corp grants restricted stock, and Section 83 applies to both with adjustments described in IRS guidance.

The two practical outcomes for a founder who files a timely 83(b) are a small or zero ordinary-income hit at grant, when the equity is usually worth little, and capital-gains treatment on the eventual sale, when the equity is, the founder hopes, worth much more. The corresponding outcomes for a founder who does not file are ordinary-income recognition at each vesting milestone, calculated on the then-current FMV of the equity, and a higher effective tax cost across the life of the equity in most cases. The decision is fact-specific and depends on the founder's individual tax situation.

LLC founders vs C-corp founders: where the path diverges

A C-corp founder typically receives restricted stock, usually common stock subject to a four-year vesting schedule with a one-year cliff. The Section 83(b) decision is binary. File within 30 days of grant to lock in the tax basis at the grant date FMV, or do not file and accept ordinary-income treatment at each vest.

An LLC founder generally receives an interest in the LLC under one of two main classifications. A profits interest gives the holder a share of the LLC's future profits and appreciation, but no share of the LLC's value as of the grant date. A capital interest gives the holder an immediate share of the LLC's value at the grant date in addition to future profits. The two classifications are taxed differently, and the 83(b) decision interacts with the classification in different ways.

A pure profits interest under Rev Proc 93-27 and related guidance is generally treated as having a zero FMV at grant when the safe harbor conditions are met. The founder pays no ordinary income tax at grant and does not need to file an 83(b) election to lock in the zero basis, because the basis is already zero. Practitioners often recommend filing the 83(b) election anyway as a protective measure in case the IRS later determines that the safe harbor conditions were not met or that the interest was actually a capital interest. The protective filing is a standard precaution, not a requirement.

A capital interest is taxed as ordinary income at the grant date FMV of the interest. The founder who receives a capital interest with a vesting schedule and does not file 83(b) recognizes ordinary income at each vesting milestone on the then-current FMV. The founder who files 83(b) recognizes ordinary income on the full grant date FMV upfront and subsequent appreciation becomes capital gain. The decision matters most for capital interests in LLCs that have material value at grant.

The 30-day clock and what counts as the grant date

The 30-day clock starts on the date the equity is granted, not on the date the LLC is formed or the operating agreement is signed. For most founder grants, the grant date is the date the operating agreement adopting the interest is signed and the founder accepts the interest. For employee or contractor grants, the grant date is generally the date specified in the equity grant agreement or, if not specified, the date the agreement is signed by both parties.

The 30-day window is calendar days, not business days. A founder who receives a grant on May 1 has until May 31 to file the 83(b) election with the IRS. May 31 is the deadline, not June 1. The IRS treats the postmark date on a properly addressed envelope sent by US Mail as the filing date, so a founder who postmarks the envelope on May 31 has filed timely even if the IRS receives it later.

The standard filing method is certified mail with return receipt requested. The return receipt is the founder's proof that the IRS received the election, and the postmark on the certified mail receipt is the founder's proof of the filing date. Filing by private delivery service such as FedEx, UPS, or DHL is permitted only for designated services listed in IRS guidance, and the founder's tax adviser confirms which service category the delivery falls into before relying on the alternate filing method.

Profits interest safe harbor under Rev Proc 93-27 and Notice 2005-43

Rev Proc 93-27 is the IRS safe harbor that treats certain profits interests as having a zero FMV at grant for income tax purposes. The safe harbor applies when three conditions are generally met: the interest does not relate to a substantially certain and predictable stream of income from partnership assets, the interest is not disposed of within two years of receipt, and the interest is not a limited partnership interest in a publicly traded partnership.

Notice 2005-43 expanded on Rev Proc 93-27 by introducing the concept of a 'safe harbor interest' for purposes of partnership compensation. The Notice provides additional guidance on how to apply the Rev Proc 93-27 safe harbor to vesting profits interests, including the rules on whether and when an 83(b) election is needed. The Notice is proposed guidance, and the IRS has not finalized it as a regulation, but practitioners generally rely on the Notice's framework in advising on profits interest grants.

Practical effect: a founder who receives a vesting profits interest in an LLC that operates a startup business generally meets the Rev Proc 93-27 conditions because the LLC's value at grant is uncertain. The interest has zero FMV at grant under the safe harbor. The founder does not pay tax at grant, and the founder does not need to file 83(b) to lock in the zero basis. Many tax advisers nonetheless recommend filing the 83(b) as a protective measure in case the safe harbor conditions are later challenged.

Capital interest with vesting and the 83(b) decision

A capital interest gives the founder an immediate share of the LLC's value as of the grant date, in addition to a share of future profits and appreciation. The classification matters when the LLC has assets, cash, or established revenue at the time of the grant. A founder receiving a capital interest in a year-three LLC with $2 million in retained capital is in a different position from a founder receiving a profits interest in a day-one LLC with no assets.

The Section 83(b) decision for a capital interest mirrors the C-corp restricted stock decision in mechanics. File within 30 days of grant to recognize the grant date FMV as ordinary income and start the capital-gains holding clock from grant. Do not file and recognize ordinary income at each vesting milestone on the then-current FMV. The trade-off depends on whether the founder expects the interest to appreciate, which generally favors filing, or to depreciate, which generally argues against filing.

Mixed grants, where the founder receives a profits interest in one tranche and a capital interest in another, are handled by separate 83(b) elections, one per tranche, each within the relevant 30-day window. Founders sometimes restructure mixed grants into pure profits interests to avoid the capital interest tax complexity, which is a planning move counsel and the CPA evaluate before the grant agreement is finalized.

Form 15620 and the traditional letter format

The IRS released Form 15620 in November 2024 as a standardized form for the Section 83(b) election. Before Form 15620, taxpayers filed the election as a letter that included the specific information required by Treasury Regulation Section 1.83-2: the taxpayer's name, address, and tax identification number; a description of the property subject to the election; the date of the transfer; the nature of the restrictions; the property's FMV at the time of transfer; and the amount paid for the property, if any. The IRS issued sample election language in Rev Proc 2012-29 in 2012, and that sample letter became the de facto practitioner standard for the next decade.

Form 15620 collects the same information in a standardized layout and replaces the Rev Proc 2012-29 sample letter for taxpayers who want the IRS's preferred format. The form does not change the substantive 83(b) rules. The 30-day deadline still applies, the certified mail with return receipt is still the standard filing method, and the same Treasury Regulation Section 1.83-2 contents are required. Practitioners can use Form 15620, a self-drafted letter, or both in parallel. Many tax software providers have integrated Form 15620 into their filing workflow.

A founder who used a self-drafted letter or the Rev Proc 2012-29 sample for an earlier 83(b) election does not need to refile on Form 15620. The earlier letter election remains valid as long as it included the required Treasury Regulation Section 1.83-2 contents and was timely filed within 30 days of the grant.

Late filing: why the 30-day deadline is foreclosed

The 30-day Section 83(b) deadline is set by statute in Section 83(b)(2) of the Internal Revenue Code, not by regulation. The distinction matters because the IRS has consistently held that it has no discretion to extend a statutory deadline. Treasury Regulation Section 301.9100-3, the reasonable-cause relief route that applies to many regulatory deadlines, has been denied for statutory Section 83(b) requests in IRS rulings and Tax Court decisions on the ground that the deadline is statutory.

The practical consequence is that a missed 30-day deadline forecloses the election. There is no specific revenue procedure providing late-filing relief for Section 83(b), and counsel typically advises that no administrative remedy is available once the 30 days have passed.

Founders whose original grant misses the timely-filing window sometimes work with counsel on a re-grant of the equity, which starts a fresh 30-day window from the new grant date. A re-grant must be a real economic re-issuance under the LLC's operating agreement, with the original grant cancelled and the new grant subject to the same vesting and tax rules as if it had been the first grant. The re-grant is a planning move that depends on the operating agreement's flexibility and the consent of any outside investors, not a relief procedure the IRS administers.

How save office fits an early-stage LLC founder

To be specific about the scope, save office is not a tax preparer, does not file Section 83(b) elections on behalf of founders, and is not a substitute for a CPA or a startup attorney. The founder files the 83(b) election through their own certified mail, and the tax adviser confirms the contents meet Treasury Regulation Section 1.83-2 before the envelope is sealed. Within those limits, save office fills the business mailing address slot for the LLC and the return-address line on the 83(b) envelope.

save office provides a real US business address in seven cities, Wilmington Delaware, Los Angeles, San Francisco, New York City, Tampa Florida, Washington DC, and Cheyenne Wyoming. An LLC formed in Delaware can anchor in Wilmington for the EIN application, the principal office on the Secretary of State filing, and the LLC's mailing address on the 83(b) cover letter. The venture-backed LLC and Series A data room guide covers the address consistency expectation across formation, EIN, K-1, and 83(b) records.

The Address Checker tool runs USPS Delivery Point Validation before the certified-mail envelope for the 83(b) election is sent to the IRS service center, which reduces the risk that the envelope is returned undeliverable inside the 30-day window. The get-started flow activates each address within 24 hours, which matters when the grant date is recent and the 30-day clock is already running. Pricing across the seven cities is on the pricing page.

Common mistakes LLC founders make with 83(b)

• Missing the 30-day deadline by treating the LLC formation date as the start of the clock: the grant date is the date the operating agreement adopting the interest is signed, which can be days or weeks after the LLC is formed. The 30-day count starts at grant, not at formation.
• Filing 83(b) for a pure profits interest without coordinating with the CPA on whether the Rev Proc 93-27 safe harbor already gives zero FMV at grant: the protective filing is often advisable but it should be the CPA's call, not a default, because filing the election in error can produce small but real adverse consequences if the safe harbor would have applied on its own.
• Sending the 83(b) by regular first-class mail without a return receipt: the certified mail with return receipt is the founder's proof of timely filing. A founder who sends by regular mail and the IRS later disputes timely receipt has no documentary proof of the filing date.
• Treating an early grant of a partial interest and a later grant of additional interest as one filing: each grant is a separate event with its own 30-day clock and its own 83(b) election, even when the grants involve the same founder and the same LLC.
• Using a home address as the return address on the 83(b) envelope when the LLC is otherwise filed with a business address: address mismatches between the EIN letter, the LLC's principal office, the Schedule K-1, and the 83(b) cover letter produce IRS correspondence routed to inconsistent addresses, and a misdirected IRS letter can be missed inside the 30-day window.
• Filing the 83(b) with the IRS and forgetting to provide a copy to the LLC, the service recipient: Treasury Regulation Section 1.83-2(d) requires the founder to provide a copy of the election to the entity for which the services are performed. The 2016 final regulations under Treasury Decision 9779 eliminated the prior requirement to attach a copy to the founder's individual tax return for property transferred on or after January 1, 2016, but the copy-to-service-recipient requirement remains in force.
• Treating a missed 30-day deadline as something the IRS can extend: the 30-day clock is set by statute in Section 83(b)(2) of the Internal Revenue Code, and the IRS has consistently held it has no discretion to extend it. Section 301.9100-3 reasonable-cause relief, which applies to many regulatory deadlines, has been denied for statutory Section 83(b) requests. The remedy, where the LLC's operating agreement and any investors permit, is a re-grant of the equity that starts a fresh 30-day clock from the new grant date.