If you’ve ever looked at your paystub around an RSU vesting date and thought, “This doesn’t look like a normal paycheck,” you’re not alone. RSUs can feel confusing because the taxes and reporting often show up in places you wouldn’t expect.
Below is a general roadmap of what your W-2 often reflects in the year your RSUs vest—and a few practical items to double-check.
First: what “vesting” usually means for taxes
In most cases, RSUs are taxed when they vest (not when they’re granted). On the vest date, the fair market value of the shares that vest is generally treated as ordinary income—similar to a cash bonus.
Where RSU income commonly appears on your W-2
While the exact layout can vary by employer and payroll provider, RSU vest income most commonly affects:
Box 1 — Wages, tips, other compensation
The value of the vested shares is typically included in Box 1 as part of your total wages for the year.
Box 3 and Box 5 — Social Security and Medicare wages
Many employees also see RSU income included in:
- Box 3 (Social Security wages) up to the annual wage base limit
- Box 5 (Medicare wages) (often with no cap)
Box 2, 4, and 6 — Tax withholding
To cover taxes due at vesting, companies commonly withhold amounts that show up as:
- Box 2 (Federal income tax withheld)
- Box 4 (Social Security tax withheld)
- Box 6 (Medicare tax withheld)
A key potential surprise: RSU withholding may be done using a flat supplemental rate or company default method, which may or may not match your overall situation—especially if you have other income, deductions, or multiple vesting events.
Box 12 — codes that may relate to equity/benefits
Some employers include additional detail in Box 12 (codes vary). Not every W-2 will clearly “label” RSUs here, but it’s worth looking.
“Sell to cover” doesn’t eliminate the income
Even if your employer sells some shares immediately to pay taxes (“sell to cover”) or withholds shares, the income is still generally reported on the W-2. The sale itself is typically reported separately (often on a 1099-B) by your brokerage.
Two important follow-ups (to avoid common headaches)
- Confirm your brokerage cost basis reporting. RSUs can create confusion at tax time if the cost basis on the 1099-B isn’t handled correctly on the return.
- Review whether withholding was enough. If you vest significant amounts, it can be worth discussing estimated taxes or paycheck withholding adjustments to reduce the chance of an unexpected balance due.
If you’d like, we can look at your most recent paystub/W-2 and the vesting details together and coordinate with your tax professional so you feel confident that everything is lining up correctly.