For an equity liquidity event, work through five tasks: identify the taxable transactions, project the household’s tax, reserve cash, decide how much company stock to keep, and reconcile the records. Do the first three before spending or reinvesting proceeds. An IPO announcement alone does not mean you can sell shares, and withholding does not necessarily cover the final tax bill.
1. List each transaction and its tax trigger
A single event can contain several transactions. An acquisition might cash out one award, replace another, and leave a third subject to vesting. List each one separately.
| Event | Main issue to check |
|---|---|
| RSU settlement | Compensation value, withholding, and delivery conditions |
| NSO exercise | Compensation spread and payroll withholding |
| ISO exercise and hold | Potential AMT adjustment and cash to pay it |
| Stock sale | Tax basis, holding period, and capital gain or loss |
| Acquisition or tender | Which awards are bought, converted, canceled, or paid in cash |
Use the actual offer, grant agreement, and company instructions. The IRS stock-options overview explains the different option treatments.
For each transaction, write down the event date, shares involved, value used, and when cash or stock will arrive. That record is the starting point for the tax projection.
2. Build one household tax projection
Include the transaction alongside salary, bonuses, a spouse’s income, other equity events, investment income, and deductions. Calculate federal and applicable state tax, then subtract expected withholding and estimated payments.
Keep two questions separate: How much tax will the household owe for the year? How much must be paid by each deadline? A balance due with the return and an underpayment penalty are different issues.
An ISO exercise can require a purchase payment and tax cash without producing sale proceeds. A lockup can block the sale you hoped would fund the bill. Check the earliest sale date against the payment dates before committing to an exercise.
Use the IRS estimated-tax rules to decide whether to adjust payroll withholding or make estimated payments. A large event late in the year can require an uneven-income calculation; do not assume paying at filing time is sufficient.
3. Separate tax money from spendable proceeds
Suppose a transaction sends $500,000 to your bank account after withholding. Your full-year projection shows another $90,000 of tax to fund. You have $410,000 left before other commitments, not $500,000 available to invest.
The $90,000 is an illustration, not a suggested reserve percentage. Build the reserve from your actual projection:
| Cash check | Example |
|---|---|
| Cash received after transaction withholding | $500,000 |
| Additional projected tax to reserve | −$90,000 |
| Cash available before other commitments | $410,000 |
Do not subtract withholding twice: it is already reflected in the cash received, and it must also be credited against the projected tax. Keep near-term tax money in assets whose risk and access fit the payment deadline. A tax bill due soon should not depend on a stock recovering in time.
4. Decide how much company exposure to keep
Count retained shares, options, unvested awards, and employment income together. A sale can make the bank balance look diversified while much of the household’s future income and wealth still depends on one company.
Ask what a large price decline would do to your plans. Would it delay retirement, change the house budget, or leave a tax payment unfunded? Use that downside case to choose the exposure you can afford to retain.
Then check lockups, trading windows, and company policies before setting sale dates. The tax benefit from holding is one part of the decision. Compare the tax saved with the dollars still at risk.
5. Reconcile documents and assign the next actions
Keep grant agreements, exercise confirmations, pay statements, Forms W-2 and 3921 where applicable, broker Forms 1099-B, and stock-plan basis supplements together.
Check that income already taxed as compensation is reflected in the sale basis where required. For example, stock bought through an NSO for $20,000 with $180,000 of compensation income generally has a $200,000 basis. Reporting only the purchase payment could count that $180,000 again as capital gain. IRS Publication 525 explains the basis adjustments for stock options.
Finish with a short action list:
| Action | Who to confirm it with | When |
|---|---|---|
| Finalize the tax projection | Tax preparer or CPA | Before committing proceeds |
| Change withholding or arrange payments | Payroll and tax preparer | Before the applicable deadline |
| Confirm permitted sales | Stock-plan administrator and company | Before placing an order |
| Reconcile income and basis | Tax preparer using payroll and broker records | Before filing |
| Update the plan | Household and any advisor involved | When price, timing, or income changes |
Nino’s software can help bring the household information together. If you want human help with the plan and tax work, its financial and tax services add a CPA and CFP team. Whichever tools or professionals you use, each action needs an owner and a date.