Do I owe tax on RSUs if I never sell the shares?

Yes. The tax is triggered by vesting, not by selling. You'll owe ordinary income tax on the vesting-date value even if you hold the shares indefinitely afterward.

What if my company's stock price drops after I vest but before I sell?

You still owe the same income tax on the vesting-date value — that liability doesn't change. If you then sell at a lower price, you'd have a separate capital loss, which can offset other capital gains but doesn't undo the income tax already owed.

Are RSUs taxed differently at a private company?

The core mechanics are the same, but many private-company RSUs use "double-trigger" vesting, requiring both time-based vesting and a liquidity event (like an IPO) before shares actually deliver and become taxable. Check your grant agreement for this language.

Does my employer report RSU income anywhere besides my W-2?

Your W-2 includes the vesting-date value in your wages. Your brokerage also sends a 1099-B when you sell shares, reporting proceeds — but it doesn't always show your correct cost basis, so double-check it against your vesting records.

How are RSUs taxed?

RSUs are taxed as ordinary income at vesting, not at grant or sale. Learn the mechanics, see a worked example, and avoid the common mistakes.

RSUs (restricted stock units) are taxed as ordinary income the moment they vest, based on the fair market value of the shares that day. There's no decision to make and no exercise involved — the IRS treats the vested value exactly like a cash bonus paid in stock. If you later sell the shares, any additional gain or loss from that point forward is a separate capital-gains event.

Priya is a software engineer at a mid-size public tech company. Her offer letter listed an RSU grant of 4,000 shares vesting over four years. On her first vesting date, 1,000 shares land in her brokerage account — and she's surprised to see her paycheck's tax withholding jump that same pay period, even though she hasn't sold a single share.

Key points

RSUs are taxed as ordinary income at vesting, based on the stock's fair market value that day — not at grant, and not when you eventually sell.
Unlike stock options, there's no exercise decision, no strike price, and no AMT risk with RSUs — the tax is automatic and unavoidable.
Selling shares after vesting triggers a second, separate tax event: capital gains or losses on any price movement between the vesting date and the sale date.

Why vesting — not grant — is the taxable moment

When your company grants you RSUs, nothing taxable happens yet. You don't own the shares; you own a promise that you'll receive them if you stay long enough and any other conditions are met. The IRS calls this a "substantial risk of forfeiture," and income tax doesn't apply until that risk goes away.

That risk disappears at vesting. The moment shares vest, they're yours outright — you could sell them the same day if your company's trading window allows it. At that instant, the IRS treats the full value of those shares as if your employer had handed you the equivalent amount in cash. It gets added to your W-2 as ordinary wage income, subject to federal income tax, Social Security, Medicare, and state tax, just like your salary.

Here's the intuition: your employer could have paid you a cash bonus and let you buy the stock yourself. Tax-wise, RSU vesting is treated the same way, even though no cash actually changes hands. The stock is the income.

How this differs fundamentally from stock options

If you've also received stock options, it's tempting to assume RSUs work the same way. They don't, and the difference matters.

No exercise decision. With options, you choose whether and when to exercise, and that choice affects your tax bill. With RSUs, vesting happens automatically on the schedule your company set — there's no button to press and no reason to delay.
No strike price, no spread. Options are taxed on the spread between your strike price and the market price. RSUs have no strike price — you're taxed on the entire fair market value of the shares.
No AMT risk. Exercising incentive stock options (ISOs) can trigger the alternative minimum tax on paper gains you haven't sold, sometimes creating a large tax bill with no cash to pay it. RSUs never touch AMT. The tax at vesting is straightforward ordinary income, full stop. (For more on that option-specific risk, see what is AMT on ISO exercise?.)

In short: options hand you a decision with tax consequences attached to your choice. RSUs hand you a tax bill with no choice attached at all.

Selling later is a completely separate tax event

Once your RSUs vest and get taxed as income, the shares behave like any other stock you bought on the open market — except your "purchase price" (technically, your cost basis) is the fair market value on the vesting date, which you already paid tax on.

If you sell right away, there's typically little or no additional tax, because the price hasn't had time to move. If you hold the shares and the price rises before you sell, that additional gain is a capital gain. If the price falls, that's a capital loss. Either way, this second tax event is governed entirely by ordinary capital-gains rules:

Sell within one year of vesting: short-term capital gain, taxed at your ordinary income rate.
Sell more than one year after vesting: long-term capital gain, taxed at the more favorable 0%, 15%, or 20% federal rate depending on your income, per IRS Topic No. 409.

This is the single most important mental model for RSUs: vesting taxes the value you already earned as compensation; selling later taxes only what happens to the price after that. These are two separate questions with two separate tax bills, and conflating them is where most of the confusion — and most of the costly mistakes on tax returns — comes from.

A worked example

Let's walk through Priya's vesting event with real numbers.

Priya's grant vests 1,000 shares on a day when her company's stock closes at $80 per share.

Value of vested shares: 1,000 × $80 = $80,000
This $80,000 is added directly to her W-2 wages for the year, on top of her $140,000 salary, making her reported wages $220,000.
Her employer withholds federal income tax on the $80,000 at the flat supplemental wage rate — 22% for amounts up to $1 million in a calendar year, per IRS Publication 15. That's $17,600 withheld federally, plus Social Security, Medicare, and state withholding on top.
To cover this withholding without Priya writing a check, her employer uses "sell-to-cover": it automatically sells 220 of her 1,000 vested shares (220 × $80 = $17,600) and remits that cash to the IRS, leaving her with 780 shares.

Six months later, Priya sells those 780 shares at $95 each.

Sale proceeds: 780 × $95 = $74,100
Cost basis: 780 × $80 (the vesting-date value, already taxed) = $62,400
Taxable gain: $74,100 − $62,400 = $11,700
Because she held the shares less than a year, this $11,700 is a short-term capital gain, taxed at her ordinary rate — a completely separate calculation from the $80,000 she was already taxed on at vesting.

Notice what didn't happen: Priya was never taxed twice on the same dollars. The $80,000 vesting value was taxed once, as income. The $11,700 of price appreciation after vesting was taxed once, as a gain. That's the whole system.

The formula

Taxable income at vesting = Number of shares vesting × Fair market value per share on vesting date

Capital gain or loss at sale = Sale proceeds − (Number of shares sold × Fair market value per share on vesting date)

How WealthOS helps

WealthOS tracks every vesting event across your grants automatically and shows you the exact income and withholding hitting your W-2 in real time, not after your pay stub arrives. Connect your grant and brokerage details and we'll calculate your cost basis on every lot so tax time involves zero guesswork.

Frequently asked questions

Do I owe tax on RSUs if I never sell the shares?: Yes. The tax is triggered by vesting, not by selling. You'll owe ordinary income tax on the vesting-date value even if you hold the shares indefinitely afterward.
What if my company's stock price drops after I vest but before I sell?: You still owe the same income tax on the vesting-date value — that liability doesn't change. If you then sell at a lower price, you'd have a separate capital loss, which can offset other capital gains but doesn't undo the income tax already owed.
Are RSUs taxed differently at a private company?: The core mechanics are the same, but many private-company RSUs use "double-trigger" vesting, requiring both time-based vesting and a liquidity event (like an IPO) before shares actually deliver and become taxable. Check your grant agreement for this language.
Does my employer report RSU income anywhere besides my W-2?: Your W-2 includes the vesting-date value in your wages. Your brokerage also sends a 1099-B when you sell shares, reporting proceeds — but it doesn't always show your correct cost basis, so double-check it against your vesting records.

Sources

This article is educational and not tax, legal, or financial advice. Talk to a CPA or tax advisor about your specific situation.

Educational content, not tax advice. Your outcome depends on your grant documents, income and state. Equity Tax Engine models your actual position — join the waitlist.