83(b) Election Guide: How to File, Tax Benefits & Complete Filing Instructions

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Introduction

An 83(b) election is one of the most critical—and most commonly forgotten—tax filings for startup founders and early employees receiving restricted stock. According to Pulley's analysis of thousands of equity grants, making an 83(b) election can save founders $46,000+ in taxes on a typical founder equity grant, but only if filed within 30 days of receiving restricted stock.

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Table of Contents

1. What Is an 83(b) Election?
2. How Restricted Stock Is Taxed
3. Tax Benefits of Filing an 83(b) Election
4. When You Should File an 83(b) Election
5. When You Should NOT File
6. The 30-Day Filing Deadline
7. How to File: Step-by-Step Instructions
8. Required Information for 83(b) Election
9. Common Mistakes & How to Avoid Them
10. What Happens If You Miss the Deadline
11. 83(b) Elections for Different Equity Types

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What Is an 83(b) Election?

Legal Definition

Section 83(b) of the Internal Revenue Code allows recipients of property subject to substantial risk of forfeiture (like restricted stock with vesting schedules) to elect to be taxed on the fair market value of that property at the time of grant rather than at the time it vests.

"Substantial Risk of Forfeiture" means:

• Stock is subject to vesting (you lose it if you leave before vesting)
• Stock cannot be freely transferred
• Ownership rights are conditional on continued service or performance milestones

What 83(b) Election Does

Without 83(b) Election (Default Tax Treatment):

You receive stock → No tax yet → Stock vests over 4 years →
Pay ordinary income tax each year as shares vest (based on FMV at each vesting date)

With 83(b) Election:

You receive stock → File 83(b) within 30 days → Pay ordinary income tax NOW
(based on FMV at grant date) → Future appreciation taxed as capital gains when sold

Who Needs to File

83(b) elections apply to:

• Startup founders receiving restricted stock subject to vesting
• Early employees receiving restricted stock awards (RSAs)
• Advisors receiving restricted stock compensation
• Anyone receiving equity subject to "substantial risk of forfeiture"

Does NOT apply to:

• Stock options (ISOs or NSOs) — these follow different tax rules
• Fully vested stock with no restrictions
• Restricted stock units (RSUs) — these cannot make 83(b) elections

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How Restricted Stock Is Taxed

Default Tax Treatment (No 83(b) Election)

According to IRC Section 83(a), without an 83(b) election, restricted stock is taxed as ordinary income at fair market value as it vests.

Tax Events:

1. At Grant: No tax owed (stock hasn't vested yet)
2. As Stock Vests: Ordinary income tax on FMV of each tranche as it vests
3. At Sale: Capital gains tax on appreciation from vest date to sale date

With 83(b) Election

With an 83(b) election, you accelerate the tax timeline:

Tax Events:

1. At Grant: Ordinary income tax on FMV of ALL shares (even unvested)
2. As Stock Vests: No additional tax
3. At Sale: Capital gains tax on ALL appreciation from grant date to sale date

Ordinary Income Tax vs Capital Gains Tax

Understanding the tax rate difference is crucial:

Tax Type	2025 Federal Rates	Applies To
Ordinary Income	10% - 37% (Highest bracket: $609,350+ single, $731,200+ married)	• Salary, wages • Restricted stock at vesting (no 83(b)) • Restricted stock at grant (with 83(b))
Short-Term Capital Gains	Same as ordinary income 10% - 37%	• Assets held ≤1 year before sale
Long-Term Capital Gains	0%, 15%, or 20% (Highest bracket: $553,850+ single, $1,107,700+ married)	• Assets held >1 year before sale • Qualified stock with 83(b) election

Key Insight: The maximum federal long-term capital gains rate (20%) is 17 percentage points lower than the maximum ordinary income rate (37%). State taxes may add another 0-13.3%.

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Tax Benefits of Filing an 83(b) Election

Real-World Example: Startup Founder

Let's walk through a typical founder scenario to illustrate the tax savings. This example is based on Pulley's research and Carta's analysis of thousands of equity grants.

Scenario:

• Founder: Sarah co-founds a startup
• Equity Grant: 1,000,000 shares of restricted stock
• Vesting: 4-year vesting with 1-year cliff (25% per year)
• Purchase Price: $0.001/share = $1,000 total
• FMV at Grant: $0.05/share = $50,000 total FMV
• Tax Bracket: 37% (federal ordinary income)
• Company Growth: Stock appreciates to $25/share at exit (Year 5)

Option A: FILE 83(b) Election (Within 30 Days)

Year 0 (Grant Date):

Ordinary Income Recognized: $50,000 (FMV) - $1,000 (paid) = $49,000
Ordinary Income Tax: $49,000 × 37% = $18,130

Years 1-4 (Vesting):

Tax Owed: $0 (already paid at grant)

Year 5 (Exit at $25/share):

Sale Proceeds: 1,000,000 × $25 = $25,000,000
Cost Basis: $50,000 (FMV at grant per 83(b) election)
Long-Term Capital Gain: $25,000,000 - $50,000 = $24,950,000
LTCG Tax (20%): $24,950,000 × 20% = $4,990,000

TOTAL TAX WITH 83(b): $18,130 + $4,990,000 = $5,008,130

Option B: DO NOT File 83(b) Election

Year 0 (Grant Date):

Tax Owed: $0 (no 83(b) election filed)

Year 1 (25% vests at $5/share):

Shares Vesting: 250,000
FMV at Vest: $5/share
Ordinary Income: 250,000 × $5 = $1,250,000
Ordinary Income Tax: $1,250,000 × 37% = $462,500

Year 2 (25% vests at $10/share):

Shares Vesting: 250,000
Ordinary Income: 250,000 × $10 = $2,500,000
Ordinary Income Tax: $2,500,000 × 37% = $925,000

Year 3 (25% vests at $15/share):

Shares Vesting: 250,000
Ordinary Income: 250,000 × $15 = $3,750,000
Ordinary Income Tax: $3,750,000 × 37% = $1,387,500

Year 4 (25% vests at $20/share):

Shares Vesting: 250,000
Ordinary Income: 250,000 × $20 = $5,000,000
Ordinary Income Tax: $5,000,000 × 37% = $1,850,000

Year 5 (Sale at $25/share):

Now calculating capital gains for each vesting tranche:

Year 1 Tranche: ($25 - $5) × 250,000 = $5M gain → $1M tax (20%)
Year 2 Tranche: ($25 - $10) × 250,000 = $3.75M gain → $750K tax (20%)
Year 3 Tranche: ($25 - $15) × 250,000 = $2.5M gain → $500K tax (20%)
Year 4 Tranche: ($25 - $20) × 250,000 = $1.25M gain → $250K tax (20%)

Capital Gains Tax: $2,500,000

TOTAL TAX WITHOUT 83(b): $4,625,000 (vesting) + $2,500,000 (sale) = $7,125,000

The Bottom Line

	With 83(b)	Without 83(b)	Difference
Total Tax Paid	$5,008,130	$7,125,000	$2,116,870 SAVED
Effective Rate	20.0%	28.5%	8.5 points lower

Key Takeaway: By filing an 83(b) election within 30 days and paying $18,130 upfront, Sarah saves $2.1+ million in total taxes—a 30% tax reduction.

Why the Savings Are So Large

The tax savings from 83(b) elections compound through two mechanisms:

1. Locks in Lower Valuation: Ordinary income tax calculated on $50K (grant FMV) instead of $12.5M (cumulative vest FMV)
2. Converts Tax Type: $25M of appreciation taxed as long-term capital gains (20%) instead of ordinary income (37%)

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When You Should File an 83(b) Election

Strong Candidates for 83(b) Election

Situation	Why File 83(b)?	Tax Savings Potential
Startup Founders at Incorporation	• FMV = minimal (often $0.001/share) • Upfront tax = $0 or near-zero • Entire future appreciation = capital gains	Extreme Often $0 upfront tax, $100K-$1M+ saved
Early Employees (Pre-Series A)	• FMV still relatively low ($0.10-$1/share) • High growth expectations • Long time horizon (>5 years to exit)	Very High $50K-$500K saved
Advisors Receiving Restricted Stock	• FMV minimal at early stage • 2-year vesting = shorter timeline • Converts advisor comp to capital gains	High $10K-$100K saved
Restricted Stock at Zero or Low FMV	• Upfront tax cost = $0 or minimal • No downside risk • Pure upside if company succeeds	Extreme Unlimited upside, zero downside
High-Conviction on Company Success	• Confident in 10x+ growth • Willing to pay tax upfront • Can afford tax bill from other funds	Very High Proportional to growth

The "Founder at Incorporation" Sweet Spot

Absolute Best Case for 83(b) Election:

Founder purchases 8,000,000 shares at $0.001/share = $8,000 total
FMV at incorporation = $0.001/share (same as purchase price)
Taxable income = $8,000 - $8,000 = $0
83(b) election tax owed = $0

Result: Zero tax owed upfront, and 100% of future appreciation (potentially millions) taxed as long-term capital gains instead of ordinary income.

Why This Works: At incorporation, the IRS agrees that common stock FMV = par value = purchase price. No "spread" = no taxable income, but 83(b) election still converts all future appreciation to capital gains.

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When You Should NOT File an 83(b) Election

Scenarios Where 83(b) May Backfire

Situation	Risk	Alternative Strategy
High FMV at Grant	Pay large upfront tax on stock that may never vest or appreciate Example: $500K FMV = $185K tax (37%) due immediately	Don't file 83(b); pay tax as stock vests only if still employed
Uncertain About Staying	Pay tax on unvested shares, then forfeit them if you leave No tax refund for forfeited shares	Wait to see if you stay; only pay tax on shares that actually vest
Can't Afford Upfront Tax	IRS doesn't accept "IOU" payments May need to sell assets or borrow to pay tax bill	Don't file 83(b); pay tax as shares vest (can sell some stock to cover)
Company Likely to Fail	Pay tax on stock that becomes worthless Capital loss deduction capped at $3K/year	Don't file 83(b); if company fails before vesting, you pay $0 tax
Later-Stage Company (Post-Series B+)	High FMV + lower growth expectations = less tax arbitrage opportunity Risk of overpaying tax if stock doesn't appreciate much	Run tax scenarios; often better to not file 83(b) at later stages

The "Forfeiture Risk" Problem

Worst-Case Scenario:

Year 0: File 83(b) election, pay $100K tax on $270K FMV
Year 2: Leave company before 4-year vesting complete
Result: Forfeit 50% unvested shares, but NO TAX REFUND on $50K of tax paid

IRS Rule: 83(b) elections are irrevocable. If you forfeit unvested shares, you don't get a refund on taxes paid. You may eventually claim a capital loss, but it's capped at $3,000/year deduction.

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The 30-Day Filing Deadline

The Rule: No Exceptions, No Extensions

Critical Timeline:

Day 0: You receive restricted stock (grant date)
         ↓
Day 1-30: You MUST file 83(b) election with IRS
         ↓
Day 31+: TOO LATE — Deadline missed, no do-overs

According to IRC Section 83(b)(2), the 83(b) election "shall be made within 30 days after the date of transfer." This deadline is:

• Strictly enforced — No exceptions for "didn't know" or "forgot"
• Calendar days — Not business days
• Non-extendable — No IRS relief provisions
• Irreversible if missed — Cannot file late 83(b) elections

How to Calculate the Deadline

Start Date = Date of Transfer (Grant Date)

"Date of transfer" typically means:

• Date you sign the restricted stock purchase agreement
• Date you pay for the stock (if applicable)
• Date stock is issued in your name on cap table

Not the date your attorney drafts documents or the date you discuss equity.

Example Timeline:

March 1, 2025 (Thursday): Sign stock purchase agreement → Grant date
March 31, 2025 (Monday): Last day to file 83(b) (Day 30)
April 1, 2025 (Tuesday): TOO LATE

Weekend/Holiday Rule: If Day 30 falls on weekend or federal holiday, deadline extends to next business day (applies to mailing deadlines).

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How to File: Step-by-Step Instructions

NEW: IRS Form 15620 (Available July 2025)

As of July 2025, the IRS introduced Form 15620 for standardized 83(b) elections. This form enables online electronic filing through IRS.gov.

Two Filing Methods:

1. Online Filing via Form 15620 (New as of 2025)
2. Traditional Paper Filing via Certified Mail (Still accepted)

Method 1: Online Filing with Form 15620 (Recommended for Speed)

Steps:

1. Access Form 15620 on IRS.gov

   • Visit IRS.gov/Form15620
   • Log in with ID.me credentials (or create account)

2. Complete Form 15620 Online

   • Enter all required information (see Required Information section below)
   • Upload any supporting documentation (stock purchase agreement)

3. Submit Electronically

   • Receive immediate confirmation number
   • Download confirmation receipt (PDF)
   • Keep confirmation receipt as proof of filing

Advantages:

• ✓ Instant confirmation of receipt
• ✓ No mail delays or lost mail risk
• ✓ Automated date-stamping

Disadvantages:

• ✗ New system (potential technical issues)
• ✗ Requires IRS.gov account setup
• ✗ Limited historical precedent for disputes

Method 2: Traditional Paper Filing via Certified Mail (Gold Standard)

Materials Needed:

• Completed 83(b) election statement (see template below)
• 3 copies total (IRS, your tax return, your records)
• Certified mail receipt
• Return receipt requested (green card)

Steps:

Step 1: Prepare 83(b) Election Statement

Create a written statement containing all required elements (see next section).

Step 2: Make Copies

• Copy 1: Mail to IRS
• Copy 2: Attach to your tax return for the year of transfer
• Copy 3: Keep for your permanent records

Step 3: Mail to IRS via USPS Certified Mail

IRS Mailing Address (as of 2025):

Internal Revenue Service
Ogden, UT 84201-0002

Mailing Requirements:

• Must use: USPS Certified Mail with Return Receipt Requested
• Reason: Provides legal proof of timely mailing
• Cost: ~$10 (certified) + $3 (return receipt) = $13 total

Alternative Approved Carriers:

• FedEx Priority Overnight, Standard Overnight, 2Day
• UPS Next Day Air, Next Day Air Saver, 2nd Day Air
• DHL Express 9:00, 10:30, 12:00, Worldwide Express

Step 4: Deliver Copy to Employer

Mail or deliver a copy to your company's payroll/HR department (required by regulations).

Step 5: Attach Copy to Tax Return

When you file your income tax return for the year of transfer, attach a copy of the 83(b) election to your Form 1040.

Post-Filing: Verification

Within 2-4 weeks, you should receive:

• Return receipt (green card) showing IRS received your mailing
• Possible: IRS acknowledgment letter (not always sent)

If you don't receive return receipt after 4 weeks:

• Contact IRS at 1-800-829-1040
• Reference your certified mail tracking number
• Request confirmation of receipt

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Required Information for 83(b) Election

Sample 83(b) Election Template

The IRS does not provide an official form (except new Form 15620). For paper filing, you must create a written statement containing these elements per IRC Section 83(b)(2):

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 for the current taxable
year the amount of any compensation taxable in connection with his/her
receipt of the property described below:

1. The name, taxpayer identification number, and address of the taxpayer:

   Name: [Your Full Legal Name]
   Social Security Number: [XXX-XX-XXXX]
   Address: [Your Current Address]
            [City, State, ZIP]

2. Description of property with respect to which the election is being made:

   [Number] shares of Common Stock of [Company Legal Name], a
   Delaware corporation (the "Company").

3. The date on which the property was transferred:

   [Month Day, Year]

4. The taxable year for which this election is being made:

   Calendar Year [Year] (January 1 - December 31, [Year])

5. The nature of the restriction(s) to which the property is subject:

   The shares are subject to the Company's right to repurchase at the
   original purchase price if the taxpayer's service with the Company
   terminates before the shares vest. The shares vest over a period of
   [X] years, with [X]% vesting on [date] and [X]% vesting monthly/annually
   thereafter, subject to the taxpayer's continued service.

6. The fair market value at the time of transfer (determined without
   regard to any restriction other than a restriction which by its terms
   will never lapse):

   $[Amount] per share
   Total: $[Total FMV] ([Number of shares] × $[FMV per share])

7. The amount paid for the property:

   $[Amount] per share
   Total: $[Total Paid] ([Number of shares] × $[Price per share])

8. A copy of this statement has been furnished to the Company.

_________________________________          __________________
Signature                                  Date

Print Name: [Your Full Legal Name]

Critical Elements Checklist

Before mailing, verify your 83(b) statement includes:

• [ ] Your full legal name (must match tax returns)
• [ ] Your Social Security Number or TIN
• [ ] Your current mailing address
• [ ] Exact number of shares received
• [ ] Company's full legal name and state of incorporation
• [ ] Exact grant date (match stock purchase agreement)
• [ ] Tax year (calendar year of transfer)
• [ ] Description of vesting restrictions
• [ ] Fair market value per share (get from 409A valuation or board resolution)
• [ ] Total FMV calculation
• [ ] Amount paid per share
• [ ] Total amount paid
• [ ] Statement that copy provided to company
• [ ] Your signature and date (must be signed!)

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Common Mistakes & How to Avoid Them

Mistake #1: Missing the 30-Day Deadline

How It Happens:

• Founder receives stock, forgets to file 83(b)
• Accountant/attorney doesn't remind founder
• Founder thinks "I'll file with my tax return"

Consequence: Miss the deadline = lose the ability to file forever. All tax benefits lost.

How to Avoid:

• Set calendar reminder for Day 15 and Day 25 after grant
• File immediately (don't wait until Day 29)
• Use certified mail or online filing for proof of timely filing

Mistake #2: Incorrect FMV Reporting

How It Happens:

• Using wrong valuation (outdated 409A, board didn't set FMV)
• Guessing FMV instead of using official valuation
• Using preferred stock price instead of common stock FMV

Consequence: IRS may challenge your election and recalculate tax owed + penalties.

How to Avoid:

• Use FMV from most recent 409A valuation (for C-Corps)
• Get board resolution establishing FMV if no 409A exists
• For founders at incorporation: FMV = purchase price (typically $0.001/share)

Mistake #3: Not Sending Copy to Employer

How It Happens:

• Founder mails to IRS but forgets employer copy
• Founder assumes company will file on their behalf

Consequence: IRS regulations require providing copy to employer. Failure may invalidate election.

How to Avoid:

• Send copy to company's CFO/HR/payroll department
• Email AND mail copy for redundancy
• Get written confirmation from company they received it

Mistake #4: Not Attaching to Tax Return

How It Happens:

• File 83(b) with IRS in Month 1, but forget to attach copy to tax return in April next year
• Accountant doesn't know about 83(b) election

Consequence: IRS may disallow election if not attached to return.

How to Avoid:

• Give copy of 83(b) to your tax preparer immediately
• Add note to tax file: "83(b) ELECTION MUST BE ATTACHED"
• Verify 83(b) is attached before signing tax return

Mistake #5: Filing 83(b) for Stock Options

How It Happens:

• Confusion between restricted stock and stock options
• Trying to file 83(b) for unvested ISOs or NSOs

Consequence: 83(b) elections do not apply to stock options (except early exercised options). Filing is meaningless.

How to Avoid:

• Restricted Stock (RSAs) → File 83(b)
• Stock Options (ISOs/NSOs) → Do NOT file 83(b) (unless you early exercise and receive restricted stock)
• RSUs → Cannot file 83(b)

Mistake #6: Not Having Cash to Pay Tax

How It Happens:

• File 83(b) election, recognize $500K taxable income
• April tax deadline arrives, owe $185K, but have no cash
• Stock is illiquid (private company), can't sell shares to cover tax

Consequence: Owe IRS money you can't pay. Penalties and interest accrue.

How to Avoid:

• Calculate tax owed BEFORE filing 83(b)
• Tax owed = (FMV - Amount Paid) × Your Tax Rate
• Ensure you have cash to cover April tax bill
• Consider: Will company allow you to sell some shares to cover tax?

Mistake #7: Forgetting to Sign

How It Happens:

• Prepare beautiful 83(b) statement, mail it unsigned

Consequence: IRS may reject election as defective.

How to Avoid:

• Sign 83(b) statement before mailing
• Keep signed copy for your records
• Verify signature on copy to IRS

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What Happens If You Miss the Deadline

The Bad News: No Second Chances

If you miss the 30-day deadline:

• Cannot file late 83(b) election — No IRS relief provisions exist
• Revert to default taxation — Taxed on FMV as stock vests (not at grant)
• Lose capital gains treatment — All appreciation taxed as ordinary income as vests

Example of Missed Deadline:

Founder receives 1M shares at $0.05 FMV, pays $1,000
Forgets to file 83(b) within 30 days

Year 1: 250K shares vest at $5 FMV
Tax owed: 250K × ($5 - $0.004) = $1.25M income → $462K tax

Year 2: 250K shares vest at $10 FMV
Tax owed: 250K × ($10 - $0.004) = $2.5M income → $925K tax

[Continues for Years 3-4, total tax = $4.6M+ instead of $18K with 83(b)]

Damage Control Strategies

If you've missed the 30-day deadline, consider:

Strategy 1: Accelerate Vesting (If Company Agrees)

Some startups will agree to accelerate vesting to trigger all taxation now (when FMV is still relatively low) rather than wait for higher future valuations.

How: Company board passes resolution removing vesting restrictions immediately.

Result: All shares vest NOW. You pay ordinary income tax on current FMV (no 83(b) benefit, but better than paying tax at even higher future FMV).

Downside: Lose retention incentive from vesting; company may refuse.

Strategy 2: Forfeit and Reissue (Risky)

In extreme cases, founders have:

1. Forfeited unvested shares back to company
2. Received new restricted stock grant
3. Filed 83(b) within 30 days of NEW grant

IRS View: This is potentially abusive and may be challenged. Consult tax attorney before attempting.

Strategy 3: Live with It

Accept default tax treatment and plan for:

• Liquidity events timed with vesting to sell shares to cover taxes
• Tax reserves from salary/other income to cover taxes
• Company tax payment assistance (some startups offer loans or bonuses to cover tax)

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83(b) Elections for Different Equity Types

Restricted Stock Awards (RSAs) ✅ Can File 83(b)

What It Is: Direct stock grant subject to vesting.

83(b) Strategy: File 83(b) within 30 days to pay tax on grant-date FMV instead of vest-date FMV.

Best For: Founders and early employees when FMV is low.

Stock Options (ISOs/NSOs) ❌ Usually Cannot File 83(b)

What It Is: Right to purchase stock at exercise price in future.

83(b) Strategy: Generally cannot file 83(b) for stock options because you don't yet own property subject to forfeiture (you just have an option).

Exception: If you early exercise unvested options and receive restricted stock, you can file 83(b) on the restricted stock received from exercise.

Early Exercised Options ✅ Can File 83(b)

What It Is: Some option plans allow exercising unvested options, giving you restricted stock immediately.

83(b) Strategy: File 83(b) within 30 days of early exercise to lock in cost basis.

Why This Works: Early exercise converts option into restricted stock subject to forfeiture → 83(b) eligible.

Restricted Stock Units (RSUs) ❌ Cannot File 83(b)

What It Is: Promise to deliver stock in future upon vesting.

83(b) Strategy: Cannot file 83(b) for RSUs. RSUs are not "property" until they vest—they're a contractual promise to deliver property later.

Tax Treatment: Always taxed at FMV when RSUs vest (no way to avoid this).

Founders' Stock ✅ ALWAYS File 83(b)

What It Is: Common stock issued to founders at incorporation with vesting.

83(b) Strategy: Always file 83(b) — Usually zero or near-zero upfront tax, converts all future appreciation to capital gains.

Timeline: File within 30 days of signing stock purchase agreement.

Advisor Stock ✅ Usually File 83(b)

What It Is: Restricted stock issued to advisors for services.

83(b) Strategy: File 83(b) if FMV is low and advisor expects to stay through vesting.

Consideration: If advisor may leave before 2-year vesting completes, 83(b) creates forfeiture risk.

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83(b) Election FAQs

Q: Can I revoke an 83(b) election after filing?

A: No, 83(b) elections are irrevocable once filed. You cannot undo the election even if circumstances change.

Limited Exception: IRS has granted revocations in rare cases where there was a "mistake of fact" (e.g., incorrect FMV reported). See IRS Letter Ruling examples. Do not rely on this—treat elections as permanent.

Q: What if I leave the company and forfeit unvested shares?

A: You already paid tax on the full grant (via 83(b) election). If you later forfeit unvested shares:

• No tax refund from IRS
• May claim capital loss equal to FMV you reported minus any amount recovered
• Loss is capped at $3,000/year ordinary loss deduction (excess carries forward)

Example:

Paid $100K tax via 83(b) on $270K FMV
Forfeited 50% unvested shares (= $135K FMV)
Capital loss = $135K → Deduct $3K/year for 45 years (!)

Q: Do I file 83(b) with my tax return or separately?

A: File 83(b) separately within 30 days of receiving stock. You also attach a copy to your tax return the following April, but the 30-day filing to IRS is separate and earlier.

Q: What if my company is an LLC, not a C-Corp?

A: 83(b) elections work for LLCs receiving "profits interests" with vesting, but the rules are more complex. Consult tax attorney for LLC-specific guidance.

Key Difference: LLCs issue "profits interests" or "capital interests," not stock. Taxation follows partnership rules (K-1s), not corporate stock rules.

Q: Can my company file the 83(b) election on my behalf?

A: No, you (the taxpayer) must file the 83(b) election. The company cannot file on your behalf.

Company's Role: Company should:

• Remind you to file 83(b)
• Provide FMV information from 409A or board resolution
• Confirm receipt of your copy of the 83(b) election

Q: What if FMV increases after I file 83(b) but before stock vests?

A: Perfect—that's exactly why you filed 83(b)! You pay tax on grant-date FMV. All future appreciation is taxed as capital gains, not ordinary income.

Q: Do I need a lawyer to file an 83(b) election?

A: Not required, but recommended if:

• FMV is high (>$100K) and upfront tax is substantial
• Complex vesting terms or acceleration provisions
• Questions about whether 83(b) makes sense in your situation

For straightforward founder stock at incorporation (FMV = $0), filing yourself with certified mail is fine.

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Sample Tax Calculation Worksheet

Use this to estimate your 83(b) election tax consequences:

83(B) ELECTION TAX CALCULATOR

1. Number of shares received:                    [________] shares

2. Fair market value per share (from 409A):      $[________]

3. Total FMV (Line 1 × Line 2):                 $[________]

4. Amount you paid per share:                    $[________]

5. Total amount paid (Line 1 × Line 4):         $[________]

6. TAXABLE INCOME (Line 3 - Line 5):            $[________]

7. Your federal tax bracket:                     [____]%

8. Federal tax owed (Line 6 × Line 7):          $[________]

9. Your state tax bracket:                       [____]%

10. State tax owed (Line 6 × Line 9):           $[________]

11. TOTAL TAX DUE (Line 8 + Line 10):           $[________]

This tax is due by April 15 of the following year.

LONG-TERM CAPITAL GAINS BENEFIT:

12. Expected sale price per share:               $[________]

13. Total sale proceeds (Line 1 × Line 12):     $[________]

14. Cost basis WITH 83(b) (Line 3):             $[________]

15. LTCG with 83(b) (Line 13 - Line 14):        $[________]

16. LTCG tax rate (typically 20%):               [____]%

17. LTCG tax WITH 83(b) (Line 15 × Line 16):    $[________]

WITHOUT 83(B) ELECTION (for comparison):

18. Vesting-date FMV (estimated):                $[________]

19. Ordinary income (Line 1 × Line 18):         $[________]

20. Ordinary income tax (Line 19 × 37%):        $[________]

21. Total tax WITHOUT 83(b):                    $[________]
    (Line 20 + capital gains on remaining appreciation)

TOTAL TAX SAVINGS FROM 83(B):                   $[________]

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Conclusion

The 83(b) election is one of the most powerful tax optimization tools available to startup founders and early employees, with the potential to save hundreds of thousands or even millions of dollars in taxes over a startup's lifecycle. However, it requires:

1. Filing within 30 days of receiving restricted stock (strictly enforced, no extensions)
2. Understanding the risks (paying tax on stock that may be forfeited or become worthless)
3. Having cash available to pay the upfront tax bill
4. Following proper filing procedures (certified mail or online Form 15620)

Key Takeaways:

• 83(b) elections are mandatory for founders receiving restricted stock at incorporation (typically $0 upfront tax, huge future savings)
• File immediately upon receiving restricted stock—don't wait until Day 29
• Use certified mail with return receipt or new online Form 15620 for proof of timely filing
• Attach copy to tax return the following year
• Provide copy to employer (required by IRS regulations)

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Additional Resources

IRS Resources

• IRS Publication 525: Taxable and Nontaxable Income - Official IRS guidance on Section 83
• IRS Form 15620 - New online 83(b) election form (2025)
• IRC Section 83 - Full text of tax code

Guides & Calculators

• Carta 83(b) Election Guide - Comprehensive tax examples
• Pulley 83(b) Election Guide - Founder-focused explanations
• Cooley GO 83(b) Resources - Legal practice guidance

Related Content

• Founder Agreements & Vesting - When to issue restricted stock
• Early Employee Equity - ISOs vs RSAs for employees
• Advisory Board Equity - 83(b) for advisor restricted stock

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