A Section 83(i) election lets a qualifying employee at an eligible private company postpone federal income tax on stock received from exercising options or settling RSUs for up to five years after vesting. It exists to solve a specific cash-flow problem: the IRS treats the spread between fair market value and exercise price as taxable compensation the moment the shares vest, but private company shares cannot be sold to raise the cash to pay that tax. The election buys time for a liquidity event to arrive before the bill comes due.
What the Deferral Actually Covers
The election postpones federal income tax only. Social Security and Medicare taxes are still owed at vesting or exercise, because the statute that created Section 83(i) made no changes to FICA or FUTA treatment. The employer withholds and remits those employment taxes on the vesting-date fair market value, the same as any other compensation. So the election does not zero out the immediate tax bill. It removes the largest piece and leaves the rest.
The deferred amount is locked at the value on the original vesting or exercise date. Appreciation after that point is not part of the deferred income. And the character does not change: when the deferral ends, the income comes in as ordinary compensation, taxed at whatever marginal rate applies that year.
Does Your Company Qualify
Not every private company can offer this. During the calendar year of the grant, the corporation has to clear two tests.
First, no stock of the corporation or any predecessor can have been traded on an established securities market in any prior calendar year. A company with any public trading history is out.
Second, the company must maintain a written plan that grants stock options or RSUs to at least 80% of its U.S. employees, and those grants must carry the same rights and privileges as the ones given to the employee making the election. If the company fails this test, no one at the company can use the election. When calculating the 80%, excluded employees (the executives and owners described below) and part-time employees who customarily work fewer than 30 hours a week are left out of the denominator.
There is also a limit on the stock itself. Shares don’t qualify if, at the time they first vest, the employee has the right to sell them back to the company or take cash instead. The election is for actual equity, not disguised cash bonuses.
Are You an Eligible Employee
Even at a qualifying company, some individuals are shut out. The statute draws a hard line around senior leadership and significant owners.
- Anyone who owns 1% or more of the corporation at any point during the current calendar year or the preceding 10 calendar years.
- The CEO and CFO, including anyone who held either position at any earlier time. Once you’ve held the job, you’re out permanently.
- Family members of the CEO or CFO under the attribution rules of Section 318(a)(1): spouses, children, grandchildren, and parents.
- The four highest-compensated officers for the current taxable year or any of the 10 preceding taxable years.
The lookback windows are long on purpose. A founder who served as CEO nine years ago and then moved into a different role still cannot use Section 83(i). The exclusions reserve the benefit for rank-and-file employees who lack the insider liquidity that executives typically have.
How to Make the Election
The election is not automatic. You have to opt in by filing a written statement with the IRS within 30 days of the date the stock first vests or becomes transferable, whichever is earlier. The statute directs that the filing be made “in a manner similar to” a Section 83(b) election, meaning a written statement rather than a specially designated IRS form.
The statement should include your name, address, taxpayer identification number, a description of the stock, the transfer date, the taxable year for which the election is being made, and an attestation that the stock qualifies under Section 83(i). One copy goes to the IRS, one goes to your employer. Certified mail with return receipt is the reliable way to prove the filing was timely if the date is ever disputed.
Missing the 30-day window is fatal. A late election is invalid, the full spread is included in income in the year of vesting, and there is no relief provision. This is one of the more unforgiving deadlines in the tax code.
The employer has to move first. Before you can make the election, the company must provide a written certification that the stock is qualified and notify you that the election may be available. That notice has to arrive at or before the time the income would normally be included.
What Ends the Deferral
The deferred amount snaps into your gross income in the tax year that includes the earliest of five events:
- The stock becomes transferable, including transferable back to the employer.
- You become an excluded individual, for example by being promoted to CEO or crossing the 1% ownership threshold.
- The company’s stock becomes publicly traded on an established securities market. An IPO or direct listing triggers inclusion, and this is often the same event that finally provides cash to pay the bill.
- Five years pass from the date the stock first vested or became transferable, whichever was earlier. This is the outer limit.
- You revoke the election under procedures the IRS prescribes.
In practice, the five-year clock and the IPO are the common triggers. At companies that stay private and restrict transfers, employees typically run out the full five years.
What Happens When the Deferral Ends
On the inclusion date, the deferred amount enters your gross income as ordinary compensation. The figure is the fair market value at the original vesting date minus what you paid for the stock. If the shares were worth $200,000 at vesting and you paid $20,000 to exercise, $180,000 of ordinary income is recognized when the deferral closes, regardless of what the shares are worth then.
Withholding is not at your W-4 rate. Section 3402(t) requires the employer to withhold federal income tax at the highest individual rate, currently 37%, without regard to your Form W-4 elections. That is mandatory, not discretionary. In practice, you have to arrange cash to cover the withholding, often through a sell-to-cover or net-exercise arrangement if the company offers one. The employer reports the included income on your W-2 in Box 12 using Code GG, and reports any amount still being deferred under active elections using Code HH.
Basis and Holding Period
Once the deferred income has been included, your basis in the shares equals the fair market value used for the ordinary income calculation. Under Section 83(f), the capital gains holding period starts on the date the stock first vested or became transferable, not on the later inclusion date. Because the deferral can last up to five years, employees who still hold the shares at inclusion already have a long-term holding period built up. Appreciation above basis from that point on qualifies for long-term capital gains rates when you sell.
The Risk If the Stock Drops
The taxable amount is locked in at vesting-date value. If the stock falls during the deferral period, the tax is not recalculated at the lower price. Shares worth $200,000 at vesting still produce $200,000 of ordinary income even if they’re worth $80,000 five years later. There is no adjustment mechanism and no recovery within Section 83(i). You can end up paying ordinary income tax on wealth you never realized. If you have real doubts about the company’s trajectory, weigh that against the liquidity benefit before electing.
How It Compares to a Section 83(b) Election
The two elections both concern the timing of income on equity compensation, but they sit at opposite ends of the vesting timeline. A Section 83(b) election accelerates income recognition: you file within 30 days of receiving restricted stock that is still subject to vesting, choosing to pay tax immediately on the current value so that future appreciation becomes capital gain rather than ordinary income. A Section 83(i) election does the opposite. You have already vested or exercised and would owe tax now, and the election pushes that inclusion date out by up to five years. The deferred amount stays ordinary income no matter how long the deferral runs.
The two do not apply to the same shares. An 83(b) election is for unvested stock; an 83(i) election is for vested stock at an illiquid private company. Someone receiving unvested restricted stock at an early-stage startup would look at 83(b) to lock in a low valuation. Someone exercising vested options at a late-stage private company with a high valuation and no secondary market would look at 83(i) to avoid an immediate tax hit they cannot fund.
The Tradeoff for Incentive Stock Options
Incentive stock options normally receive favorable treatment: no ordinary income at exercise, and the spread taxed as long-term capital gain if the holding periods are met. Making a Section 83(i) election on ISO stock strips that treatment away. The ISO is treated as a disqualifying disposition, and the shares are taxed under the rules for nonqualified stock options. The spread becomes ordinary compensation income, deferred for up to five years, but ordinary income all the same.
For ISO holders, the election is a real tradeoff: deferral now in exchange for permanently losing capital gains treatment. If you can afford the tax at exercise, keeping the ISO treatment and paying the tax is often the better result, since long-term capital gains rates run well below ordinary rates. The 83(i) election makes the most sense for ISO holders who genuinely cannot fund the tax at exercise and have no other route.
State Taxes May Not Follow
The deferral applies to federal income tax only. States are not required to conform to Section 83(i), and several do not. In a non-conforming state, you may owe state income tax on the full spread at vesting or exercise while the federal tax is deferred. That can create a partial cash crunch that eats into the point of the election, especially in high-rate states where the state portion alone is significant. Check your state’s conformity before you assume the deferral covers both bills.