Section 83(b) Election for Founders: QSBS, LTCG, and the 30-Day Window

Not tax or legal advice. The 83(b) election is irrevocable and time-sensitive. Work with a qualified tax advisor and review filings with tax counsel before the 30-day deadline expires.

A single tax election — filed within 30 days of receiving restricted stock — can be worth tens of millions of dollars to a UHNW founder. The Section 83(b) election under IRC §83(b) lets you recognize ordinary income on restricted stock at grant (when the 409A value is low) rather than at vesting (when the company may be worth multiples more). Done right, it converts the entire appreciation into long-term capital gain and starts the QSBS §1202 five-year holding period the moment you receive your shares.

Miss the 30-day window, and neither the LTCG nor the QSBS benefits are available on that grant. There are no extensions, no exceptions, and no late filings accepted by the IRS.¹

Restricted Stock vs. RSUs: Who Can File

The 83(b) election is only available for restricted stock — actual shares transferred to you at grant, subject to a vesting restriction (right of repurchase or forfeiture condition). It is not available for RSUs (restricted stock units), which are contractual promises to deliver shares in the future. RSUs are not a "transfer of property" at grant because you don't own the shares yet.²

Stock options (ISOs and NQSOs) have a different tax framework (§83 still applies at exercise, but the 83(b) can only be filed for an early exercise of unvested options). If you early-exercise ISOs or NQSOs before they vest, you can file an 83(b) election on the purchased shares to start the holding period and, for ISOs, manage AMT exposure. The analysis is similar but involves additional considerations — see our executive compensation planning guide.

How the 83(b) Election Works

Under IRC §83, property received for services is generally included in gross income in the year the property becomes "substantially vested" — which for restricted stock means when vesting restrictions lapse (i.e., the company loses its repurchase right for that tranche).¹ Without a §83(b) election, you recognize ordinary income at each vesting event equal to the fair market value of the shares vesting minus any price you paid for them.

When you file a §83(b) election within 30 days of the grant, you elect to recognize all ordinary income immediately at the time of transfer (the grant date) rather than at vesting. The taxable amount is the FMV of the shares at grant minus the purchase price you paid (often nominal — $0.001/share for founder shares). From that point forward:

• Future appreciation (from grant date to eventual sale) is long-term capital gain, taxed at 0%/15%/20% federal (plus 3.8% NIIT at UHNW income levels), provided you hold the shares more than one year from grant.
• The one-year LTCG clock starts at the grant date, not at each vesting date.
• For QSBS §1202 purposes, the five-year holding period starts at the grant date — not when the shares vest.

If you do not file the 83(b) election:

• Each tranche recognizes ordinary income at vest equal to the FMV at vest minus your price paid.
• For monthly vesting over four years, you could have 48 separate ordinary income recognition events as the company's value grows.
• The LTCG holding period for each tranche starts at its vest date — meaning the first tranche you sell within a year of vest is short-term capital gain.
• For QSBS, the five-year holding period for each lot starts at its vest date. A four-year vesting schedule means the first tranche doesn't qualify until five years after the first vest — up to nine years after grant.

The Tax Math: With vs. Without 83(b)

Consider a UHNW scenario: a co-founder receives 2,000,000 shares of C-corporation restricted stock in January 2026 with a 4-year monthly vesting schedule. The 409A fair market value at grant is $0.10/share. The company exits 5 years later at $25.00/share.

With 83(b) election (filed within 30 days of January 2026 grant)

Without 83(b) election

If the company reaches a $10/share valuation by year 2 (when most shares have vested), the founder recognizes ordinary income as shares vest — roughly $9.90/share on each lot. Over the 4-year vest period with monthly events, this generates substantial W-2-equivalent income taxed at 37% + 3.8% Medicare at UHNW income levels. Rough estimate for this scenario:

The 83(b) election in this scenario saves approximately $2.4M in federal taxes — and that's before accounting for the QSBS exclusion, which applies only when the five-year clock starts at grant. Without 83(b), the QSBS benefit for a 5-year exit is entirely lost for shares vesting in years 2–4, since those lots won't reach five years of holding by exit.

QSBS §1202 Interaction: Why the 83(b) Election Changes Everything

For founders holding QSBS-eligible restricted stock, the 83(b) election is inseparable from QSBS planning. The §1202 exclusion requires a five-year holding period, and the holding period clock starts at the date you "acquire" the stock.³ How that acquisition date is determined depends on whether you filed a §83(b) election:

• With 83(b) election: The entire grant is treated as acquired at the grant date. All 2,000,000 shares have the same five-year clock starting January 2026. By January 2031, all shares qualify for the QSBS exclusion.
• Without 83(b) election: Each lot is acquired at its vest date. Monthly vesting over four years means shares vesting in January 2027 have a five-year clock ending in January 2032; shares vesting in January 2030 (the final tranche) have a clock ending in January 2035. A 2031 exit — five years after grant — would leave a majority of the shares outside the QSBS window.

Post-OBBBA, for C-corporation stock issued after July 4, 2025, the §1202 exclusion is:

• 50% of gain (up to $15M) after a 3-year hold
• 75% of gain (up to $15M) after a 4-year hold
• 100% of gain (up to $15M) after a 5-year hold³

For stock issued before July 4, 2025, the pre-OBBBA rules apply: 100% exclusion after 5 years, capped at the greater of $10M or 10× basis. The 83(b) election filed within 30 days of a 2026 grant falls under the OBBBA rules. See our QSBS planning guide for the full §1202 mechanics, gifting strategies across family members, and the California non-conformity problem.

California Founders: The Sourcing Trap

If you are a California resident when you file an §83(b) election on restricted stock, California takes a specific and aggressive sourcing position: because the §83(b) election treats the stock as acquired at the grant date, California taxes the entire gain as California-source income based on the portion of your services performed in California from grant to vest — even if you move out of California before the stock is sold.

This differs from the no-83(b) scenario, where each lot's vest-date FMV is sourced based on residency at the vest date. Under §83(b), by "electing in" at grant as a California resident, you potentially lock California's apportionment rights over the entire appreciation for that grant.

Specifically, for each lot of restricted stock with an §83(b) election, the Franchise Tax Board will look at: (1) the grant date, (2) the vesting schedule end date, and (3) the fraction of that service period you spent in California. That fraction of the total gain may be taxable in California regardless of where you live when the shares are sold.

Practical implication for UHNW founders:

• If you plan to establish Florida, Nevada, or Texas residency before your exit, the §83(b) election locks some California sourcing into the gain — it does not clean it up entirely the way moving before vest would for an RSU.
• If you have not yet moved when the restricted stock grant is made, one option is to delay the grant (if the company permits) until after you've established non-California residency, eliminating the California sourcing entirely.
• The California problem is most acute for founders at early-stage companies with long vesting schedules — if you'll spend 3 of 4 vest years in California, 75% of the gain could be California-sourced regardless of where you sell.

This is one of the most commonly misunderstood aspects of §83(b) elections. The IRS election and state sourcing rules operate on different logic. See our state tax domicile change guide for the FTB audit standard and the equity apportionment framework.

Filing the 83(b) Election: Step-by-Step

The §83(b) election is a written statement filed with the IRS within 30 calendar days of the date of the transfer of property (the grant date). There is no extension available — not for illness, not for travel, not for administrative delays. Missing the deadline forfeits the election permanently for that grant.⁴

Required contents of the election statement

Per IRS guidance, the §83(b) election must include:⁴

1. The taxpayer's name, address, and taxpayer identification number
2. A description of each item of property — the number of shares and their nature
3. The date on which property was transferred (the grant date) and the taxable year to which the election relates
4. The nature of the restriction(s) to which the property is subject (the vesting schedule / right of repurchase)
5. The fair market value at the time of transfer (often based on the most recent 409A valuation)
6. The amount paid for the property (often $0.001/share or similar nominal amount)
7. A statement that copies have been furnished to the appropriate persons (the employer/company)

Filing and retention

1. File with IRS by certified mail, return receipt requested. Send to the IRS service center where you file your federal income taxes. Keep the postmark evidence — it establishes you filed within 30 days.
2. Provide a copy to the company. The company needs the election for its own tax records and equity cap table management.
3. Attach a copy to your federal tax return for the year the election is made. Beginning with the 2016 tax year, the IRS eliminated the separate 30-day filing requirement for attaching the election to the return, but still retains the 30-day IRS service center filing requirement. Keep copies in your permanent records — the election may be relevant at audit years later.
4. If applicable, file with your state tax authority. California and some other states have their own §83(b)-equivalent election requirements. Your tax advisor should confirm state filing obligations.

Common 83(b) Mistakes at UHNW Scale

• Missing the 30-day deadline. Even a single day late forfeits the election. Calendar the deadline the moment you receive the grant, and file within the first two weeks if possible. Don't wait until day 28 to find a tax advisor.
• Filing on RSUs. A §83(b) election on restricted stock units is invalid and will be rejected. RSUs are not a transfer of property at grant. If you accidentally file on RSUs, there is no tax benefit and potentially misleading records.
• Not retaining evidence of filing. The certified mail return receipt is your proof the election was timely. If the IRS later claims no election was received, the burden shifts to you to prove timely filing. Keep the proof indefinitely.
• Assuming the election solves the California problem. As described above, the §83(b) election may lock California's apportionment claims based on where you lived during the service period. Filing an election is not a substitute for state residency planning.
• Failing to model the downside. If the company fails or the stock becomes worthless after you file the 83(b) and pay tax on the grant-date FMV, you do not get that tax back (except potentially as a capital loss when the shares become worthless — subject to loss limitation rules). For restricted stock in an early-stage company with real failure risk, the 83(b) election should include a downside scenario analysis.
• Overlooking the QSBS §75M gross assets test. The §1202 exclusion requires that the company's aggregate gross assets not exceed $75M at the time of issuance. If the company is already large at grant, QSBS may not apply — the §83(b) election is still beneficial for LTCG and NIIT savings, but the 5-year clock benefit for QSBS becomes irrelevant.