For most people deciding when to sell RSUs after vesting, Modera Wealth Management's answer is the first open trading window, because the vest was already taxed as income and waiting only adds risk. RSUs are taxed as ordinary income on their value at vesting, and that value becomes your cost basis, so a $60,000 vest sold at $60,000 adds $0 of new gain.
The question we hear most in first meetings goes like this: "I get a vest every quarter and I've never had a rule for it. Do I hold, or do I sell?" Clients usually ask it after a vest has already landed and the shares are sitting in a brokerage account, growing a little more risky each week.
If you're 10 to 15 years from retirement, the stakes are higher than they look. You have less time to recover from a bad year, and the catch-up years are close. This checklist walks through the beliefs that keep people holding, the rules behind them, and a worked example you can rerun with a calculator using your own numbers. It covers a single vest; it won't pick which older lot to sell first.
By David Okonkwo, ChFC — Retirement Planning Specialist | Reviewed by Robert Kim, AIFDavid helps pre-retirees navigate Social Security claiming decisions and Medicare timing to maximize lifetime benefits.
A vest you keep is a purchase of your employer's stock with after-tax money. Ask yourself whether you'd write that check in cash, and if not, sell it.
Daniel Reyes, CFP® and Lead Advisor, Modera Wealth Management
I see zero-basis 1099-Bs every February. Fixing them on Form 8949 can save thousands, but only if your preparer knows the vest-date value.
Priya Anand, CPA and Tax Director, Modera Wealth Management
Holding a year turns the whole vest into a long-term gain
People say it like a rule: hold for a year and the vest gets the low rate. The IRS rule is different. The full value of the shares on vest day is ordinary income, it shows up on your W-2, and it's taxed that way no matter when you sell. Only the price movement after the vest date can ever become a long-term gain.
The long-term clock starts on the vest date, not the grant date. Say a share vests in March and you want long-term treatment. You have to hold it more than one year, so the sale has to come after that March date the following year. A sale a day early is still short-term, and short-term gains are taxed at your ordinary rate, but only on the growth.
Take a $60,000 vest that rises 10 percent over the year. Holding saves tax only on the $6,000 of growth. At Tuan's assumed 35 percent rate against a 15 percent long-term rate, the saving is 20 percent of $6,000, or about $1,200. Meanwhile all $60,000 rides on one stock, the same company that pays your salary. Vests come four times a year, so a habit of waiting stacks up fast. Any investment can fall below what you paid for it.
The clock starts on vest day
What a year of waiting is actually worth
The IRS taxes the full vest-day value as ordinary income, whether you sell that day or in five years. Waiting only affects the growth after the vest.
The shares withheld at vest cover my tax bill
Often they don't. Many plans withhold at a flat supplemental rate, which can sit below a staff engineer's real bracket, so check the percentage on the vest confirmation and ask payroll which rate it uses. If the answer is the standard supplemental rate and your salary plus vests put you well above it, plan on a balance due next April.
Selling right after vesting is a bet against my company: the $60,000 test
Selling at vest is the same as being paid a cash bonus. Keeping the shares is the same as taking that bonus and buying your employer's stock with it. Put that way, most people see the choice differently.
For illustration, take a hypothetical 34-year-old named Tuan, a single staff engineer at a public cloud software company. He has $60,000 of RSUs vest this quarter. Of his $1.2 million net worth, about $900,000 sits in his employer's shares, and he wants that cut to a fifth over three years. He rents and has never sold a share.
The plan withholds an assumed 22 percent, so $13,200 of shares are sold to cover tax and he keeps $46,800. At his assumed 35 percent rate he really owes $21,000, so $7,800 is still due next April ($21,000 minus $13,200).
If he holds and the stock falls 30 percent, his $46,800 becomes $32,760 ($46,800 times 0.70), a $14,040 loss, and the $7,800 is still owed. If he sells, he sets aside the $7,800 and invests $39,000. At an assumed 5 percent a year for 12 years, that grows to about $70,000 ($39,000 times 1.80). That's a illustration, not a forecast. His employer stock stays at $900,000 instead of rising to $946,800.
Here is where asset location comes in. The $39,000 lands in his taxable account, so Modera Wealth Management would put a broad stock index fund there, which pays little taxable income, and keep higher-income holdings in his 401(k) or IRA. Some vest cash can also cover a larger 401(k) deferral, up to the 2026 IRS limit of $24,500. The trade-off is plain: selling gives up upside on the stock he knows best, in exchange for not stacking another year of risk on top of his paycheck.
Hold versus sell, step by step
Where the sale money goes
Decision shortcut: if you wouldn't take a cash bonus of the same size and buy your employer's stock with it, sell the vested shares in the first open window, and set aside the gap between the plan's withholding and your actual tax rate.
| Item | Sell at vest | Hold the shares |
|---|---|---|
| Employer stock afterward | $900,000 | $946,800 |
| Tax bill on the vest | $21,000 | $21,000 |
| Cash to set aside | $7,800 | $7,800 |
| Money working outside employer | $39,000 | $0 |
| Kept shares after 30% drop | None held | $32,760 |
Is the trading window open on your vest date?
Not always, because many companies close the window for weeks around earnings and a vest can land inside it. Ask legal or the stock plan team for the window calendar covering the next four quarters. A 10b5-1 plan sets sales in advance, but changing its amount, price or timing counts as ending it and starting a new one, with a new cooling-off period.
Single at 34, married at 50: the same vest, a different answer
Tuan has one paycheck, so his job and his vests rest on the same company, which makes selling each vest matter more. A married couple with a spouse in a different industry can carry a bit more employer stock. Neither can ignore the pile that builds: four $60,000 vests a year is $240,000 added to one stock if none are sold, and that compounds below six figures just as it does above.
Now picture someone 10 to 15 years from retirement, heading into the catch-up years (an extra $8,000 in a 401(k) for 2026, according to the IRS). A 30 percent drop hurts more when there's less time to earn it back. For that person, selling at vest usually comes before any other move, and the vest cash can help fund the larger deferral.
The table gives each step an owner, and the row where the answer flips is the shortfall: the plan administrator covers part of it at vest, but only you or your tax preparer can pay the rest. Before the first sale, ask the plan administrator or custodian these three things:
Be wary if the answer is that basis shows as zero or not reported. In February, Tuan's 1099-B shows a zero basis for the $46,800 of shares he sold; reported as-is, that income is taxed a second time, about $16,380 more at an assumed 35 percent, until the vest-date basis is entered on Form 8949.
What changes with a spouse and with age
Questions for the administrator
| Task | Who does it | When |
|---|---|---|
| Sell-to-cover withholding | Plan administrator | Vest date |
| Confirm trading window is open | Employee, with company legal | Before placing the order |
| Sell the newly vested lot | Employee | First open window day |
| Pay the withholding shortfall | Employee or tax preparer | Next estimated tax date |
| Fix 1099-B basis on Form 8949 | Tax preparer | February to April |
| Choose account for proceeds | Employee with advisor | Within days of the sale |
- Which lot does each sale draw from
- Will the 1099-B show vest-date basis
- How many business days until shares sell
Before the next quarterly vest: Modera Wealth Management's first look at your accounts
Modera Wealth Management would first read your last vest confirmation, the withholding rate on it and last year's 1099-B. It would then see which of the taxable account, 401(k) and Roth IRA could take the proceeds, and how far the next sale moves employer stock toward a fifth of net worth.
Selling at vest is the same as being paid a cash bonus; keeping the shares is the same as spending that bonus on your employer's stock.
What people ask about when to sell RSUs after vesting
If I sell vested RSUs and the stock jumps the next month, can I buy back in without a tax problem?
Yes, usually. Buying back after selling at a gain creates no wash-sale problem, because that rule only applies to losses. If you sold at a loss and bought the same stock again within a 61-day window centered on the sale (30 days each way), the loss is disallowed for now and added to the new shares' basis. Your company may also restrict when insiders can buy.
How much extra tax do I owe if I sell RSUs on the same day they vest?
Almost none beyond the vest tax itself. The vest value is already ordinary income, and it becomes your cost basis, so selling at that price leaves little or nothing to tax as gain. Any move in price between vest and sale is a small short-term gain or loss. The real extra cost is usually the withholding shortfall, like Tuan's $7,800.
How soon after a vest do the shares reach my brokerage account so I can sell them?
It varies by company and broker, often between one and several business days after the vest date. The plan administrator has to finish the sell-to-cover and transfer the remaining shares. Ask how many business days until shares can be sold, and confirm the trading window is open before you place the order.
Do I need to make an estimated tax payment after a large RSU vest?
Often yes, if withholding falls short of your real tax bill. The IRS expects tax to be paid during the year, and a large vest taxed at a flat supplemental rate can leave a gap. Compare the withholding percentage with your bracket, then adjust your W-4 or send an estimated payment by the next quarterly due date.
What happens to RSUs that haven't vested yet if I quit before the next vest date?
In most plans, unvested RSUs are forfeited when you leave, and you get nothing for them. Shares that have already vested are yours to keep or sell. Some plans have special terms for layoffs, retirement or acquisitions, so read your grant agreement or ask the plan administrator before you give notice.
Read the rules at the source
This is general information, not advice for your specific situation. Investing involves risk, including loss of principal. Nothing here replaces guidance from a tax professional or attorney. Talk to a qualified adviser before you act.