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Read your pay stub after an RSU vest: federal, FICA, state, and net pay

Each pay stub line on an RSU vest check maps to wage reporting — compare gross vest FMV, withholding, and FICA to your confirmation before calling payroll.

Rates and rules change. Content is reviewed for tax year 2026. Check the last-reviewed date and methodology on each page, then confirm against IRS or state guidance before you file.

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Your vest hit on a normal payroll cycle and the pay stub looks wrong — extra withholding lines, lower net pay than you modeled, or Social Security tax missing on the vest line.

In plain terms

An on a pay stub usually adds lines: gross in taxable wages, federal income tax withheld (often at the Pub. 15 supplemental rate), FICA on the , and sometimes state tax. Net pay on that stub can drop sharply even when base salary unchanged. Compare each line to your confirmation — they should reconcile before you ask payroll to fix anything.

Gather before you start

  • Pay stub from the pay period (PDF or portal export).
  • confirmation with shares, per share, and gross value.
  • Prior pay stub from the same year for YTD FICA and wages.

How the tax works

Payroll treats delivery as a wage event in the pay period shares . The gross value of shares delivered — on the — is added to taxable wages for that check, same category as a bonus, not as a separate investment line.

Federal on the portion often uses IRS rules. You may see a flat rate on the equity amount while salary uses your W-4 settings. That is why the federal line on a stub does not match your usual salary paycheck percentage.

FICA applies to as wages. Social Security tax stops after you hit the annual wage base; a late-year may show Medicare only on the equity line if salary already consumed the cap. Medicare generally applies to the full amount.

or net settlement may not appear as a separate pay stub line you can read easily — shares are sold or withheld before deposit. The wage tax is still calculated on full before shares leave the account. Your stub should still show gross wages, not net shares times price.

State depends on payroll residence setup. A stub with no state line while you expect state tax may mean payroll has not updated residence, or you are in a no-tax-wage state for typical residents.

What to check on your end

  • Gross taxable wages on the check vs confirmation (should match).
  • Federal rate on the vs Pub. 15 supplemental rate your employer quotes.
  • Social Security and Medicare lines — YTD before the on your prior stub.
  • State tax line if applicable vs your expected state rate.
  • Net pay vs cash you need for rent or estimated tax — plan a gap if is flat 22% federal only.

Comparing vest net pay percentage to salary net pay percentage

A check is mostly on a lump of equity income. Net pay as a percent of gross will look terrible compared with salary. Model tax on directly, not net pay divided by gross on that one stub.

What to pull from your files

  • Current and prior pay stub with YTD boxes.
  • confirmation PDF.
  • Employer supplemental rate notice if HR publishes one.

Biweekly salary check vs vest check same month

Illustration only, not your tax situation.

Lee earns $9,000 gross salary per biweekly check with usual W-4 . Lee also vests $14,000 on the second check in March. That check shows $9,000 salary plus $14,000 equity gross, federal on the $14,000 at the supplemental rate, FICA on $23,000 combined subject to caps, and net pay far below Lee's normal $5,500 take-home. Lee saves the confirmation showing $14,000 to match gross wages.

Questions people ask

Which pay stub line is RSU income?
Look for , equity compensation, or a lump added to gross taxable wages — labels vary by payroll vendor. The amount should match confirmation .
Why zero Social Security on my RSU vest line?
You may have already reached the Social Security wage base from salary YTD. Medicare usually still appears.
Does sell-to-cover reduce gross wages on the stub?
No. Full is wages; share sales for happen after the wage amount is determined.
Pay stub does not match vest confirmation — now what?
Email payroll with both documents attached. Ask for corrected if the year already closed.

When a CPA is worth it

  • Gross wages on stub do not match confirmation and payroll disagrees.
  • Two states withheld on one check with no move.
  • FICA taken on wages clearly above the Social Security cap.

Sources and notes

Primary tax claims on this page are supported by the official and secondary sources below. Broker and software links describe reporting mechanics — confirm rules against IRS or state guidance.

Pay stub wage lines for RSU vest FMV, supplemental withholding, and FICA.

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VestingTax.com is not a CPA firm or tax preparer. Grants, employers, and states all differ. Use the cited IRS and state sources above, your own documents, and a qualified tax professional before you make decisions from this guide.

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