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RSU tax calculator

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. 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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In plain terms

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.

How the tax works

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 on your end

  • 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 a CPA is worth it

  • 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.

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.

How RSU vest wages and share sales appear on W-2, 1099-B, and Form 8949.

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For learning, not filing

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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