Early exercise stock options: what startup founders and employees should know

October 14, 2026

An early exercisable stock option lets the holder buy shares before the option vests. The shares they receive are restricted stock: the company can buy back any unvested shares, usually at the price paid, if they leave. Early exercise makes the most sense when the exercise price equals the current fair market value. Then exercising, plus an 83(b) election filed within 30 days of the date the shares are issued, creates no taxable income. The risk is paying cash for stock that may end up worth nothing.

Key takeaways

Early exercise must be allowed by both the plan and the individual grant.
It works best when the exercise price equals the current fair market value.
An 83(b) election isn’t legally required, but the tax benefit depends on it. It must be filed within 30 days of the date the shares are issued on exercise.
Large early-exercisable ISO grants can partly become NSOs because of the $100,000 limit.

How does early exercise work?

The holder pays the exercise price for some or all of their options, including unvested ones, and receives shares under a restricted stock purchase agreement. Unvested shares stay subject to the company’s repurchase right and vest on the original schedule.

From that point the holder is a stockholder, not just an optionholder. They can vote all of their shares, unvested ones included, and have the same rights to dividends and company information as other holders of common stock. With an 83(b) election, the holding period for long-term capital gains generally starts at exercise rather than as each tranche vests. ISOs have their own holding-period rules, so the holder should confirm the details with a tax advisor.

What does it look like in practice?

Example: An early employee has 50,000 options with a $0.10 exercise price, and the current 409A value is also $0.10. Exercising everything costs $5,000. With an 83(b) election, there’s no income to report now. Without one, each vesting date is taxed on the increase in value since the exercise. See 83(b) Election.

What are the costs and risks?

It means cash up front for stock that may never be worth more. If the holder leaves before vesting, the company can buy back the unvested shares at the price paid, so they get their money back but nothing more. If the company fails, the money is gone.

What about ISOs?

All early-exercisable ISOs count as first exercisable in the year of grant. Only $100,000 worth (measured at grant) can qualify as ISOs, so any excess is treated as NSOs. Exercising ISOs when the 409A value is above the exercise price can create alternative minimum tax even with an 83(b). Talk to a tax advisor. See NSO vs ISO.

What does the company need to do?

Allow early exercise in the plan and the grant.
Have the holder sign a restricted stock purchase agreement.
Track the repurchase right on the cap table.
Collect a copy of the holder’s 83(b) election.
Hold the unvested shares in escrow with a signed stock power, so a repurchase doesn’t depend on the holder’s cooperation.

Should my company offer early exercise?

Only where it clearly helps. Early exercise adds work for the company: a stock purchase agreement for every exercise, repurchase rights to track on the cap table, and 83(b) elections to collect. When someone misses the 30-day deadline, they often look to the company to fix a problem it can’t fix. That’s why many startups offer early exercise only to their first hires, while the 409A value is still close to the exercise price and the benefit is real.