If you’re an early employee at a startup with equity, the decision of when to exercise your stock options can be worth hundreds of thousands of dollars, and getting it wrong is one of the most expensive mistakes people make in tech.
What Startup Equity Actually Is
Most startup compensation packages include stock options: the right to buy shares at a fixed “strike price” for a set window of time. If your strike price is $1 and the stock is later worth $50, you can buy at $1 and capture the $49 spread. But you have to pay for those shares upfront when you “exercise,” and options don’t last forever. They typically expire 10 years from the grant date, or 90 days after you leave the company (some companies now extend that window).
The Exercise Decision: Now, Later, or at Exit
Exercising early starts the clock on long-term capital gains treatment, which can meaningfully cut your future tax bill. Here’s a real scenario: 100,000 options with a $1 strike price, and a current 409A valuation (the “fair market value” the IRS recognizes) of $1.20 per share. Exercise now and you pay $100,000 plus modest tax on the $0.20 spread. Wait three years and the 409A hits $20 a share, and you’re paying $775,000 to exercise, plus a much larger tax bill.
Early exercise also breaks the “golden handcuffs” that keep you tied to a job you might otherwise leave, since you’re no longer waiting on a liquidity event to afford your own options.
The counterargument matters too: exercising early means putting real money into an illiquid, high-risk asset that’s already tied to your paycheck. Employees who exercised at peak valuations at companies like WeWork watched valuations fall from $47 billion to $8 billion in a matter of months. That risk is real, and it should factor into any decision, not just the tax math.
Running the Numbers
Using the same 100,000-option example, assume the 409A hits $20 in three years and $100 at a five-year IPO. Exercise everything now for $100,000 upfront, and a successful exit nets roughly $6.25 million after tax. Wait three years and exercise for $775,000 (including AMT), and a successful exit nets about $5.56 million. Wait until IPO and exercise for $5.42 million, and you’d net about $4.58 million, but you also risk nothing upfront if the company fails.
Early exercise wins on paper if the company succeeds, but that’s a real “if.” Most startups don’t produce an exit at all.
Your Own Balance Sheet Comes First
Before exercising anything, take an honest look at your liquidity: cash on hand, upcoming expenses like a house down payment or tuition, and how much you can afford to lock up for 5 to 10 years, which is the typical timeline for a startup exit (if there is one). A common rule of thumb from financial advisors is that no single investment should represent more than 5 to 10% of your net worth. If exercising would blow past that, think twice.
Your inside view as an employee is genuinely valuable here: revenue trends, customer sentiment, burn rate versus runway. But employees also tend to be overly optimistic about their own companies. Try to evaluate yours the way an outside investor would. Even strong-looking companies can fall apart fast. Pebble went from a $740 million valuation to $40 million in a year. Juul dropped from $38 billion to $12 billion in two years.
Tax Treatment and Getting Liquidity Before an Exit
Incentive stock options (ISOs) can trigger the Alternative Minimum Tax when exercised, even before you sell a single share. Non-qualified stock options (NQSOs) are taxed as ordinary income at exercise. Because the mechanics differ by option type and timing, talk to a tax professional who has actually worked with startup equity before making a large move.
You may also have options before an IPO or acquisition. Some companies run periodic tender offers letting employees sell a portion of their shares, usually restricted to longer-tenured staff. There’s also a secondary market, with platforms like Forge and EquityZen connecting employees to outside buyers, though transfer restrictions and demand vary.
A Practical Framework
- Get your emergency fund and high-interest debt handled before putting money into illiquid equity.
- Know your strike price, vesting schedule, option type, and expiration terms cold.
- Evaluate your company’s trajectory as objectively as you can.
- Size any exercise decision against how much losing it entirely would hurt you.
- Get a tax professional and, ideally, a financial advisor who has handled startup equity before.
- Consider exercising in stages rather than all at once.
Treat equity as a potential bonus, not a core piece of your financial plan. The employees who come out ahead aren’t the ones who guessed right on timing. They’re the ones who understood their options, sized the bet appropriately, and made the decision deliberately instead of by default.
Educational only, not tax, legal, or investment advice. Check primary sources and speak with a qualified professional before making financial decisions.
