The email just hit. Your startup is being acquired.
Your unvested equity is accelerating. Your options are being bought out. You're about to see 6-7 figures hit your account in the next 60-90 days.
Congrats. Seriously.
Now: don't screw this up.
Because the next 90 days will determine whether this acquisition changes your financial life or just becomes a nice story about that time you made some money.
What Actually Happens to Your Equity
Acquisitions trigger different outcomes depending on what type of equity you have:
RSUs:
- Usually convert to acquirer's RSUs or cash out at acquisition price
- Unvested RSUs may accelerate (single-trigger) or continue vesting (assume and convert)
- If they accelerate, you'll owe taxes on the full amount immediately
Stock Options (ISOs/NSOs):
- Typically bought out for cash (spread between strike price and acquisition price)
- If you have unvested options, they may accelerate or be assumed by acquirer
- Buyout is taxed as ordinary income (even for ISOs, since it's a disqualifying disposition)
Common Stock (if you early exercised):
- Cashes out at acquisition price
- Taxed as long-term or short-term cap gains depending on holding period
- This is usually the best tax outcome
Important: Read your grant agreements. Acceleration terms vary. Some grants have "double-trigger" acceleration (acquisition + termination). Some have single-trigger (acquisition only). Know which you have.
The Tax Bill You're Not Expecting
Let's say your equity payout is $400,000.
Your after-tax take-home is probably $220,000-$240,000.
Where'd the other $160K-$180K go?
- Federal income tax: ~$148,000 (37% if you're in the top bracket)
- State income tax: ~$26,000 (6.5% in states like CA it's 13%+)
- FICA (if it's treated as W-2 comp): ~$11,000
Total: ~$185,000 in taxes.
And here's the kicker: if your equity is paid out as W-2 compensation, your employer will withhold some of it. But supplemental wage withholding is often only 22% federal, which means you'll be under-withheld by ~$60K.
April surprise.
The Mistakes People Make (Don't Be That Person)
1. Spending like the gross number is real
You see $400K and start thinking about down payments, cars, vacations. But your actual take-home is $240K. Set aside the taxes first.
2. Not making estimated tax payments
If your withholding is insufficient and you owe $50K+ at tax time, you may also owe underpayment penalties. Make a Q4 estimated payment to cover the gap.
3. Keeping everything in cash and doing nothing
You just got a windfall. Don't let it sit in a checking account earning 0%. But also don't rush into bad investments. Give yourself 90 days to build a plan.
4. Immediately buying a bigger house
Lifestyle inflation kills windfalls faster than anything. A $400K windfall turns into $240K after taxes. If you put it all toward a house down payment, you've just locked up all your liquidity in an illiquid asset. Keep flexibility.
5. Ignoring the vesting schedule if equity is assumed
If your unvested equity converts to acquirer RSUs and continues vesting, you're now tied to the acquirer for another 2-3 years. If you leave, you forfeit it. Understand the retention terms.
The 90-Day Financial Plan
Week 1-2: Assess the situation
- Get clarity on exactly what you're receiving (cash, acquirer equity, or both)
- Understand the payout timeline (some acquisitions pay over time, not lump sum)
- Calculate your estimated tax liability (fed + state + FICA)
- Check if your equity withholding is sufficient or if you need to make estimated payments
- Review any retention bonuses or stay agreements tied to the acquisition
Week 3-4: Set aside taxes
- Open a high-yield savings account and transfer 45-50% of the GROSS payout for taxes
- If the payout is spread over multiple years, set aside taxes for each installment
- Make an estimated tax payment if you're significantly under-withheld
Week 5-8: Build your financial plan
- Emergency fund: Make sure you have 6-12 months of expenses in cash (especially if your job is at risk post-acquisition)
- Debt payoff: Pay off high-interest debt (credit cards, personal loans). Maybe pay off student loans if the rate is >5%.
- Retirement accounts: Max out 401(k), backdoor Roth, HSA for the year if you haven't already.
- Taxable investment account: Invest the remainder in a diversified portfolio (not just the acquirer's stock if you received equity).
Week 9-12: Optimize and plan ahead
- If you received acquirer equity, set a rule-based selling plan to avoid concentration risk
- Consider donor-advised fund contributions if you have charitable intent (tax deduction now, deploy later)
- Review your overall asset allocation and rebalance if the windfall skewed it
- Update your financial plan: new net worth, new goals, new timeline
The Retention Question (Do You Stay or Leave?)
Many acquisitions come with retention bonuses or continued vesting tied to staying with the acquirer for 1-2 years.
How do you decide?
Stay if:
- The retention package is significant (30-50%+ of your annual comp)
- You're interested in the acquirer's mission and growth trajectory
- The job market is uncertain and you want stability
- You're close to vesting a large amount of equity and leaving would forfeit it
Leave if:
- The retention bonus is small relative to your market value
- The acquirer's culture is a terrible fit
- You have another offer that's significantly better (total comp, role, growth)
- You're entrepreneurial and want to do your own thing
Run the numbers: Compare (retention bonus + continued vesting + salary) vs. (new job total comp + signing bonus). Factor in taxes, vesting schedules, and career trajectory.
The Diversification Mandate
If you received acquirer stock as part of the deal, you now have a concentration problem.
Let's say you got $200K in acquirer RSUs that vest over 2 years. That's $200K of a single stock in your portfolio.
Rule: Sell at vest. Do not hold.
You already made your money on the acquisition. Don't double down by staying concentrated in the acquirer's stock. Sell, pay the taxes, diversify.
What to Do Right Now
If the acquisition just closed:
- Confirm exactly what you're receiving and when
- Calculate your tax liability and set aside 45-50% immediately
- Make an estimated tax payment if you're under-withheld
- Don't make any major purchases for 90 days
If you're in the 90-day window:
- Pay off high-interest debt
- Max out retirement accounts for the year
- Build or replenish your emergency fund
- Invest the rest in a diversified portfolio
- Update your financial plan
If the acquisition closed 6+ months ago:
- Review your current allocation
- If you're still holding acquirer stock, set a selling plan
- Make sure you're not sitting on excess cash earning nothing
- Reassess your job: are you staying for the right reasons, or just inertia?
The Bottom Line
Acquisitions are windfalls, but they're also one-time events. If you handle it well, it can accelerate your financial goals by 5-10 years. If you screw it up, it just becomes a temporary bump.
Set aside taxes first. Don't lifestyle inflate. Diversify immediately. Build a plan.
This is your moment. Don't waste it.
This article is for educational purposes only and does not constitute tax or investment advice. Consult qualified professionals regarding your specific situation.
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
