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Estimate vest tax

Why do RSUs leave some people with a refund and others with a bill?

Withholding, other deductions, and basis fixes all shape whether RSUs leave you with a refund or a bill.

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

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It comes down to whether during the year matched your real tax. Flat , other deductions and credits, state rules, and basis adjustments all push the result toward a refund or a balance due. A refund is not proof you planned well, and a bill is not proof something broke.

Why this happens

is often a flat rate that can be higher or lower than your .

Deductions, credits, and other income shift your final tax up or down.

Correctly adjusting can turn an apparent big gain into a small one, changing the outcome.

State and rules are separate and can move the result on their own.

What to check

  • Total tax withheld for the year vs. your estimated full-year liability.
  • Whether was above or below your .
  • Cost-basis adjustments on share sales.
  • Credits or deductions that lowered your tax.
  • State outcome separately from federal.

Common mistake

Reading a refund as ' were handled correctly.' A refund can simply mean too much was withheld. The useful question is whether matched your actual tax, and whether to adjust for next year.

Example scenario (hypothetical)

Illustration only, not your tax situation.

Example: Two coworkers each the same amount. One has large deductions and gets a refund; the other has additional income and owes. Same , different full-year pictures, the alone did not decide the outcome.

When to get help from a tax pro

  • You owe a large balance and want to adjust .
  • Your refund or bill swings a lot year to year.
  • You have income or in multiple states.
  • You want to plan estimated payments around future vests.

Related calculators

Related pages

For learning, not filing

Grants, employers, and states all differ. Use your own documents and a qualified tax professional before you make decisions from this guide.