Section 83(i): Defer Tax on Private Stock

Key Takeaways

• Section 83(i) stock deferral postpones income tax on private company equity for up to 5 years.
• The company must grant equity to at least 80 percent of its US employees in the same year.
• The election only defers income tax, not Social Security and Medicare taxes, which stay due.
• Deferral ends early if the company goes public or the shares become transferable.

What the Section 83(i) Stock Deferral Is

Section 83(i) of the Internal Revenue Code, added by the 2017 tax law, created the qualified equity grant and the Section 83(i) stock deferral that goes with it. When an eligible employee exercises a stock option or has a restricted stock unit settle into private company shares, the default rule taxes the spread as ordinary income right then. Section 83(i) lets the employee elect to defer that tax.

The deferral runs up to 5 years from the date the shares vest, or earlier if a triggering event happens first. It applies only to stock of a private corporation that runs a broad-based equity plan.

The Intuition

Private company shares are hard to sell. When an employee exercises options, the tax can be large even though the stock cannot be turned into cash to pay it. That mismatch has forced employees to either pass on equity or scramble for cash.

Section 83(i) eases the squeeze by delaying the tax until there is a better chance the shares can be sold, such as an IPO or acquisition. The 80 percent participation rule is the price of admission: the break is meant for companies that share equity broadly, not just with executives.

How It Works

To qualify, the corporation must be private and must have a written plan under which at least 80 percent of its US employees receive stock options or restricted stock units with the same rights and privileges in a single calendar year. The 80 percent test looks at one year at a time and is not averaged across years.

The employee files the deferral election within 30 days after the shares first become substantially vested or transferable. The deferred income is then recognized at the earliest of:

- 5 years after the shares vest
- the date the stock becomes transferable, including to the employer
- the date the company becomes publicly traded
- the date the employee becomes an excluded employee
- the date the employee revokes the election

The deferral covers income tax only. Social Security and Medicare taxes are still owed when the shares vest. Excluded employees, such as 1 percent owners, the chief executive, the chief financial officer, and certain highly paid officers, cannot use it.

Worked Example

Suppose a rank-and-file employee at a private company exercises options in 2026 and the spread between the exercise price and fair value is 80,000 dollars. The shares vest now but cannot be sold because the company is private.

Default rule:   tax on 80,000 ordinary income in 2026 (no shares to sell)
With 83(i):     income tax on the 80,000 deferred up to 5 years
Still owed now: Social Security and Medicare on the 80,000

The employee delays the income tax bill while holding illiquid shares. If the company goes public in year 3, the deferral ends then and the income is recognized, but by that point the shares may be sellable to cover the tax.

Common Mistakes

1. Assuming any private company qualifies. The 80 percent broad-based grant rule is strict. Companies that grant equity only to executives cannot offer the deferral.

2. Thinking it defers all taxes. Section 83(i) defers income tax only. Social Security and Medicare are due when the shares vest, regardless of the election.

3. Missing the 30-day election window. Like the 83(b) election, the filing deadline is short and tied to vesting or transferability. A late election is invalid.

4. Overlooking early-trigger events. An IPO, a buyback that makes shares transferable, or becoming an excluded employee can end the deferral before 5 years. Plans need to track these.

5. Confusing eligibility for executives. The chief executive, chief financial officer, large owners, and certain top-paid officers are excluded employees and cannot defer under 83(i).

Frequently Asked Questions

What is a Section 83(i) stock deferral in simple terms? A Section 83(i) stock deferral lets eligible private company employees wait up to 5 years to pay income tax on stock they got from options or RSUs. It helps when the shares cannot yet be sold to cover the tax.

How does Section 83(i) affect investment decisions? It makes accepting private company equity less risky, because employees are not forced to pay tax on shares they cannot sell. Companies use it to make broad-based equity plans more attractive to rank-and-file staff.

What is a real-world example of Section 83(i)? An employee exercises options with an 80,000 dollar spread at a private company, defers the income tax with an 83(i) election, and recognizes the income later, such as when the company goes public and the shares become sellable.

How can investors use Section 83(i) effectively? Confirm the company meets the 80 percent broad-based grant rule, file the election within 30 days of vesting, and set aside cash for the Social Security and Medicare taxes still due. Track triggering events that could end the deferral early.

How is Section 83(i) different from a Section 83(b) election? An 83(b) election pays tax early at grant to capture low value, while an 83(i) deferral delays tax for up to 5 years on private company shares. One accelerates tax, the other postpones it.

Sources

1. Cornell Legal Information Institute. "26 U.S.C. 83 - Property transferred in connection with performance of services." https://www.law.cornell.edu/uscode/text/26/83
2. The Tax Adviser. "Private company equity grants: New Sec. 83(i)." https://www.thetaxadviser.com/issues/2018/apr/private-company-equity-grants-sec-83i/
3. Fenwick. "IRS Issues New Guidance on Section 83(i)." https://www.fenwick.com/insights/publications/irs-issues-new-guidance-on-section-83i
4. BDO. "How to Utilize or to Avoid Section 83(i) Deferral of Tax Payment on Equity Compensation." https://www.bdo.com/insights/tax/how-to-utilize-or-to-avoid-section-83(i)-deferral-of-tax-payment-on-equity-compensation

Disclaimer

This article is educational content only and is not financial advice. Nothing here is a recommendation to buy, sell, or hold any security. Consult a licensed advisor before making investment decisions.