Methodology

Methodology controls for this guide

  • Official sources are listed with the date checked and what each source supports.
  • Federal scope, state/local exclusions, and assumptions are shown before any reader relies on an estimate.
  • Pages marked source-checked are not treated as expert-reviewed unless an external professional is named.
  • Material corrections update the page, date, and changelog instead of silently changing tax claims.

Key takeaways

What to know first

  • RSU vesting and later share sales are separate tax moments.
  • Supplemental withholding can be meaningfully different from final tax liability.
  • A federal estimate should be paired with state/local review when cash planning matters.

Table of contents

  1. How RSU taxation works
  2. What to estimate before vesting
  3. Calculator link

How RSU taxation works

For many U.S. employees, RSUs are taxed as wage income when shares vest and are delivered. The taxable amount is generally tied to fair market value at vest.

After vesting, the shares have a basis for capital gains purposes. A later sale can create capital gain or loss depending on sale proceeds and holding period.

What to estimate before vesting

Estimate the vesting value, expected supplemental withholding, payroll tax, and whether state or local tax applies. The calculator intentionally separates withholding from final tax liability.

If your income is high relative to the supplemental withholding rate, you may need to plan for additional tax payments.

FAQ

Are RSUs taxed twice?

The same value is not intended to be taxed twice. Vesting value can be wage income, while later appreciation or decline can be capital gain or loss.

Does this guide include state tax?

No. This guide is federal-focused. State sourcing and residency rules should be reviewed separately.

Official sources

These links are used to verify the source family behind the page. They do not replace professional advice for personal facts.