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What Is Early Exercise?
An early exercisable stock option lets the holder pay the exercise price and receive shares before they vest. The shares are issued immediately, but they remain subject to the original vesting schedule. If the person leaves before fully vesting, the company can repurchase the unvested shares at the lower of the exercise price or fair market value.
It sounds counterintuitive. Why would someone pay for shares they can't fully keep yet? The answer is taxes.
The Tax Advantage
The core benefit of early exercise is starting the capital gains clock early.
Normally, when an employee exercises a stock option, the holding period for long-term capital gains begins on the exercise date. If they wait to exercise until shares vest (or later), they may be exercising at a much higher fair market value, which creates a larger taxable spread.
With early exercise, the employee pays the exercise price when the company's value is still low. If the 409A valuation hasn't moved much since the grant date, the spread between the exercise price and the current fair market value may be close to zero.
This is where the Section 83(b) election comes in.
The 83(b) Election: The Critical Filing
When an employee early exercises, the shares they receive are "substantially non-vested" because the company retains a repurchase right on unvested portions. Under normal tax rules, the employee would owe ordinary income tax each time a tranche vests, based on the fair market value at that vesting date.
Filing a Section 83(b) election within 30 days of exercise changes this. It tells the IRS: "Tax me now, at today's value, on the full grant." If the spread is near zero, the tax bill is minimal. All future appreciation is then taxed at long-term capital gains rates when the shares are eventually sold.
The 30-day deadline is absolute. There are no extensions. Missing it means the employee gets taxed at ordinary income rates on every vesting event, which can be devastating if the company's value has grown significantly.
When Early Exercise Works Best
Early exercise is most powerful at the earliest stages of a company, when:
- The 409A valuation is at its lowest
- The spread between exercise price and FMV is minimal or zero
- The employee has the cash to cover the exercise price
- The employee is confident enough in the company to risk that capital
For a seed-stage startup where the exercise price is fractions of a cent per share, the total cost to early exercise an entire grant might be a few hundred dollars. The potential tax savings on a successful outcome can be orders of magnitude larger.
The Risks
Early exercise is not free money. There are real downsides:
- Cash at risk. The employee pays real money for shares in a company that may fail. If it does, that money is gone.
- Repurchase exposure. If the employee leaves before fully vesting, the company buys back unvested shares at cost. They get their money back, but they miss out on any appreciation.
- ISO complications. For Incentive Stock Options, the entire option value counts toward the $100,000 annual ISO limit in the year the options become exercisable. This can push grants into NSO treatment, which has different (and often less favorable) tax consequences. Many companies grant NSOs specifically for early-exercise programs to avoid this issue.
- 83(b) filing risk. The filing responsibility typically falls on the employee. If they miss the deadline, the tax consequences are severe and there is no remedy.
How to Structure It
If you want to offer early exercise to your team, the equity plan and individual grant agreements need to explicitly allow it. Not all stock option plans include early exercise provisions by default.
The company should also have a repurchase agreement in place and typically holds it in escrow. This streamlines the buyback process if someone departs before full vesting.
Board approval is required for the option grants, and the company should have a current 409A valuation to support the exercise price.
The Bottom Line
Early exercise is one of the most valuable tools in startup equity compensation, but only when the timing is right. It works best at the earliest stages, when the strike price is lowest and the tax spread is negligible.
If your company is pre-seed or seed stage and you're granting options to early team members, this is the window. Once the 409A climbs, the math changes.
We help founders structure early exercise provisions, draft the required agreements, and make sure nothing falls through the cracks on the 83(b) filing. If you're building your equity plan, let's talk.
