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You've decided to leave your job. New opportunity, better title, higher salary. You give two weeks' notice and start planning your exit.
Then someone mentions: "What about your stock options?"
You check your equity dashboard. You have 15,000 vested options with a $5 strike price. Current valuation: $25 per share. That's $300,000 in potential value, but you have just 90 days after your last day of employment to exercise them, or they expire forever.
Exercise cost: $75,000. Potential AMT bill: $65,000. Total cash needed: $140,000. And you're unemployed.
Welcome to the 90-day trap.
The standard 90-day post-termination exercise window is one of the cruelest features of startup equity compensation. It forces departing employees to make a high-stakes decision under time pressure, often without the cash or clarity they need.
Let's break down what happens to your stock options when you leave, how to plan for the 90-day window, and what your options actually are.
What Happens to Stock Options When You Leave
When you resign, get laid off, or are terminated, your equity immediately splits into two categories:
Unvested Options: Gone
Any options that haven't vested yet are forfeited immediately. They go back to the company. You get nothing.
Example: You were granted 40,000 options vesting over 4 years (25% per year). After 2.5 years, you leave.
- Vested: 25,000 options (you keep these, subject to the 90-day exercise window)
- Unvested: 15,000 options (forfeited)
No exceptions: Unless your grant agreement or separation agreement specifically says otherwise, unvested options are lost.
Vested Options: 90 Days to Decide
Your vested options remain exercisable for a limited time after your last day of employment, typically 90 days.
After 90 days, unexercised vested options expire and are worthless.
The decision: Within those 90 days, you must decide:
- Exercise all vested options (pay the strike price + any taxes)
- Exercise some options (partial exercise)
- Let them expire (walk away from the potential value)
No extensions: The 90-day period is usually non-negotiable. It's written into the stock option plan document and your grant agreement.
Exceptions: Some companies offer extended post-termination exercise windows (5 to 10 years) for departing employees, but this is rare and usually reserved for senior employees or negotiated as part of a separation agreement.
The 90-Day Window: Why It Exists and Why It's So Harsh
The 90-day window exists because of IRS rules around Incentive Stock Options (ISOs).
IRS requirement: For stock options to qualify as ISOs (which receive favorable tax treatment), they must expire within 90 days of employment termination.
If a company extends the exercise window beyond 90 days, ISOs automatically convert to Non-Qualified Stock Options (NSOs), losing their tax advantages.
The problem: Companies apply the 90-day rule to all employees and all option types (ISOs and NSOs) for administrative simplicity, even though NSOs could legally have longer exercise windows.
The result: Departing employees face a compressed timeline to make a major financial decision, often the biggest financial decision of their careers, while unemployed or transitioning jobs.
The Math: What It Costs to Exercise
Exercising stock options requires cash, sometimes a lot of cash.
Exercise cost: Strike price × number of shares
Tax cost (if ISOs): Potential AMT on the spread between strike price and current fair market value
Tax cost (if NSOs): Immediate ordinary income tax on the spread
Example:
You have 10,000 vested options with a $5 strike price. Current 409A valuation: $30 per share.
If ISOs:
- Exercise cost: 10,000 × $5 = $50,000
- Spread: ($30 – $5) × 10,000 = $250,000
- Potential AMT: ~$70,000 (28% AMT rate on spread)
- Total cash needed: approximately $120,000
If NSOs:
- Exercise cost: 10,000 × $5 = $50,000
- Spread: ($30 – $5) × 10,000 = $250,000
- Ordinary income tax (45%): ~$112,500
- Your company might withhold shares to cover taxes, or you pay separately
- Total cash needed: approximately $50,000 to $162,500 depending on withholding
Can you come up with this cash in 90 days while transitioning jobs?
The Decision Framework: Exercise or Walk Away?
Within your 90-day window, you're making a bet: Is the potential value worth the cash and risk?
Reasons to Exercise
1. You believe the company will succeed
If your company is on a clear path to liquidity (IPO, acquisition, strong secondary market), exercising could be worth millions.
2. You can afford the cash outlay
You have the exercise cost + tax bill covered without draining your emergency fund or taking on debt.
3. The risk/reward is favorable
Even if there's uncertainty, the potential upside justifies the cash at risk.
4. You joined early and strike prices are low
If you joined a seed-stage startup and your strike price is $0.50 while current value is $25, the spread is massive. Even a modest exit makes exercise worthwhile.
Reasons to Walk Away
1. You can't afford the cash
If you don't have the exercise cost + taxes, the decision is made for you.
2. The company's future is highly uncertain
If the company is struggling, has no clear path to liquidity, or burn rate is unsustainable, exercising might be throwing money away.
3. Liquidity timeline is 5-10+ years
Can you afford to lock up $100,000+ for a decade with no guarantee of return?
4. The risk outweighs the potential return
If you'd need to drain your emergency fund, take on debt, or delay other critical financial goals (buying a home, kids' education), the smart move might be to walk away.
Brutal truth: Most startup equity is worthless. If your company ultimately fails or stays private indefinitely, you'll never see a return. Sometimes the right answer is, "I'm not putting $120,000 at risk."
The Tax Complexity: ISOs, NSOs, and AMT
Your decision is complicated by tax treatment.
ISOs (Incentive Stock Options)
Exercise tax: No ordinary income tax owed at exercise, but potential AMT on the spread.
AMT risk: If the spread is large, exercising could trigger a massive AMT bill, potentially tens of thousands of dollars you owe in April even though you haven't sold shares.
Holding period: To get long-term capital gains treatment, you must hold shares for 1 year from exercise AND 2 years from grant date. If you sell sooner, it's a disqualifying disposition (taxed like NSOs).
Conversion: Once you leave your job, your ISOs remain ISOs only if you exercise within 90 days. Wait longer (if the company extends your window), and they convert to NSOs.
NSOs (Non-Qualified Stock Options)
Exercise tax: Immediate ordinary income tax on the spread (current FMV minus strike price). You'll owe this tax when you file your return, and it can be substantial.
No AMT: Unlike ISOs, NSOs don't trigger AMT. The tax is straightforward: ordinary income at your marginal rate.
Future appreciation: Once exercised, any future appreciation is taxed as capital gains (long-term if held > 1 year from exercise).
Financing Options: How to Come Up With the Cash
If you want to exercise but don't have the cash, you have a few (risky) options:
Option 1: Borrow from Family or Friends
If you have wealthy family or friends willing to lend you money, this might be the lowest-cost option.
Risks: Mixing money and relationships. If the company fails and you can't repay, it damages the relationship.
Option 2: Personal Loan or Home Equity Line of Credit (HELOC)
You can borrow against your home or take a personal loan to cover exercise costs.
Risks: You're taking on debt to buy illiquid stock. If the company fails, you still owe the loan. This can be financially devastating.
Option 3: Equity Financing (Non-Recourse Loans)
Some specialized lenders (e.g., Secfi, ESO Fund) offer non-recourse loans specifically for exercising stock options. They provide the cash to exercise, and if the company fails, you don't owe repayment. They take the loss.
How it works: The lender essentially buys a share of your upside. They get repaid with interest (often 30% to 100% of the loan amount). If it fails, they lose their investment and you owe nothing.
Costs: Expensive. The effective interest rate can be 50% to 100%+ over the life of the loan. But it's non-recourse, so your downside is capped.
When this makes sense: If you believe strongly in your company's success, can't come up with the cash, and are comfortable giving up a chunk of the upside.
Option 4: Cashless Exercise (If Allowed)
Some companies allow "cashless exercise" or "exercise and sell," where you exercise options and immediately sell enough shares to cover the exercise cost and taxes.
Problem: This usually requires a liquid market (post-IPO) or a company-facilitated secondary transaction. Most private startups don't offer this during the 90-day window.
Secondary Markets: Can You Sell Shares After Exercising?
Before exercising, understand whether you can eventually sell shares.
If the company is public: You can sell shares immediately after exercise (subject to trading windows and blackout periods).
If the company is private: You cannot sell shares without company approval. Many private companies have a Right of First Refusal (ROFR), meaning they can block or approve any sale.
Secondary markets (e.g., EquityZen, Forge): Some private companies allow secondary sales through these platforms, but you'll need company approval and the market may not be liquid.
Worst case: You exercise, spend $120,000, and cannot sell shares for 5 to 10 years (or ever if the company fails).
What If You Can't Afford to Exercise?
If you can't afford to exercise, your options are:
1. Exercise what you can afford
You don't have to exercise all vested options.. Exercise the amount you can afford and let the rest expire.
2. Negotiate with your employer
In rare cases, you can negotiate an extended exercise window as part of your separation. This is more common for senior employees or if you're leaving on good terms.
3. Walk away
This is the hardest choice emotionally, but sometimes the financially sound decision. If you can't afford it, or the risk is too high, walking away protects your financial security.
How to Plan Ahead (Before You Leave)
The 90-day trap is less painful if you plan for it.
Strategy 1: Exercise Early While Employed
If your company allows early exercise (exercising unvested options), consider exercising while still employed and the spread is small.
Why this works: You exercise when your strike price equals or is close to FMV, minimizing AMT. You start the long-term capital gains clock. When you eventually leave, you've already exercised and the 90-day window doesn't matter.
Critical: File an 83(b) election within 30 days of early exercise.
Strategy 2: Build a Cash Reserve for Exercise
If you think you might leave in the next 1-2 years, start setting aside cash specifically for exercising options.
How much to save: Exercise cost plus estimated tax bill. Run the numbers with a CPA.
Strategy 3: Understand Your Equity Before You Accept Another Offer
Before you accept a new job, calculate what your current options are worth and what it will cost to exercise. Factor this into your salary negotiation with the new employer.
Example: If you need $140,000 to exercise options but don't have it, negotiate a signing bonus or relocation package at your new job to cover the cost.
Strategy 4: Get Professional Advice Early
Don't wait until day 80 of your 90-day window to talk to a CPA and financial advisor. Get advice before you resign so you understand the full financial picture.
The Extended Exercise Window Movement
Some companies (notably Pinterest, Coinbase, Amplitude) have started offering 10-year post-termination exercise windows for departing employees.
Why companies do this: Attract and retain talent, reduce the stress of the 90-day trap, and create a more equitable outcome for employees.
The catch: Extended windows usually apply only to NSOs (ISOs automatically convert at 90 days). And relatively few companies offer this.
What you can do: When negotiating a new job offer, ask if the company offers extended exercise windows. It's a valuable benefit.
Your 90-Day Action Plan
Before You Leave (Ideally Weeks in Advance)
1. Know what you have: How many vested options? What's the strike price? Are they ISOs or NSOs?
2. Get a 409A valuation: What's the current fair market value?
3. Calculate the cost: Exercise cost plus taxes. Work with a CPA to model AMT (if ISOs) or ordinary income tax (if NSOs).
4. Assess liquidity: Is there a clear path to eventually selling shares (IPO, acquisition, secondary market)?
5. Build a decision framework: Can you afford it? Do you believe in the company? What's the risk/reward?
During Your 90-Day Window
1. Set calendar reminders: Don't let the deadline sneak up. Set reminders at Day 30, Day 60, Day 75, and Day 85.
2. Decide by Day 70: Give yourself buffer time. Don't wait until Day 89 to wire money and submit paperwork.
3. Execute the exercise: If you're exercising, contact your equity plan administrator (often Carta, Shareworks, or E*TRADE). They'll provide instructions for wiring funds and submitting exercise forms.
4. File 83(b) if early exercising unvested shares: If your company allows early exercise of unvested shares during the 90-day window (rare), file an 83(b) election within 30 days.
After Exercising
1. Track your cost basis: Keep records of the date of exercise, number of shares, strike price, and FMV at exercise.
2. Plan for AMT (if ISOs): If you triggered AMT, you'll owe additional taxes in April. Set aside cash. Track AMT credits for future years.
3. Monitor your company: Stay informed about liquidity events, secondary market opportunities, or company updates.
Common Mistakes in the 90-Day Window
Mistake 1: Ignoring the deadline
Options expire at 11:59 PM on Day 90. Miss it by one hour, and they're worthless.
Mistake 2: Waiting until Day 85 to start
The exercise process takes time (paperwork, wire transfers).
Mistake 3: Exercising without understanding AMT
ISOs can trigger massive AMT bills. Run projections before exercising.
Mistake 4: Exercising in a company with no liquidity path
If the company has no clear path to IPO, acquisition, or secondary sales, you're locking up cash indefinitely.
Mistake 5: Draining your emergency fund to exercise
Don't sacrifice financial security for illiquid stock. If exercising leaves you with no cash cushion, reconsider.
The Emotional Weight of the Decision
Walking away from stock options feels like leaving money on the table. You worked hard for those options. They're part of your compensation.
But options are only valuable if:
- The company succeeds
- You can eventually sell shares
- You can afford to exercise
If you can't afford it, or the risk is too high, walking away is not failure. It's a smart financial decision.
Don't let sunk cost fallacy (the years you worked there) drive you to make a bad financial decision now.
Get Professional Help
The 90-day window is high stakes. A mistake can cost you hundreds of thousands of dollars.
Work with:
- CPA experienced in equity compensation: For tax projections (AMT, ordinary income)
- Financial advisor: For risk/reward analysis and cash flow planning
- Attorney (if negotiating extended window): For reviewing separation agreements
The cost of advice ($2,000 to $5,000) is trivial compared to the decision you're making ($100,000 to $1,000,000+).
The Bottom Line
The 90-day post-termination exercise window is one of the harshest aspects of startup equity. It forces you to make a major financial decision under time pressure, often when you're least prepared.
Plan ahead:
- Understand your equity before you leave
- Build cash reserves if you think you'll leave soon
- Run tax projections with a CPA
- Assess the company's liquidity path
- Make an informed, rational decision
Your options are part of your compensation. Make sure you handle them wisely, whether that means exercising them or walking away.
This information is not intended to be a substitute for specific individualized tax or investment advice. We suggest that you discuss your specific situation with a qualified tax or financial advisor.
Please consult your tax professional regarding your specific tax situation.
Content in this material is for general information only and not intended to provide specific advice or recommendations for any individual.
Securities offered through LPL Financial, Member FINRA/SIPC. Investment advice offered through Great Valley Advisor Group, a registered investment advisor and separate entity from LPL Financial.
Chesapeake Financial Planners | 2402 Scotlon Ct, Forest Hill, MD 21050 | (410) 652-7868 | www.chesapeakefp.com