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How RSUs are taxed for Illinois residents

Illinois taxes RSU vest income as wages; part-year residency applies if you move in or out.

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.

State sourcing rules may depend on facts and timing

Which state taxes RSU income depends on residency, work location, grant terms, and vest date, not just where you live on December 31. Day-count splits and flat-rate estimates on this site are planning tools only, not legal sourcing determinations.

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In plain terms

Illinois taxes income as wages with a flat state income tax. If you move into or out of Illinois during the year, a part-year return generally applies, splitting income between your Illinois and non-Illinois periods.

How the tax works

Illinois treats value as taxable wage income at the state level.

Illinois uses a flat income tax rate on wages.

Part-year residents generally file to report income for the portion of the year they lived in Illinois.

Equity earned while you worked in Illinois may be Illinois-connected even if it vests later.

What to check on your end

  • Illinois state wages on your .
  • The current Illinois flat rate from official sources.
  • Whether a part-year return applies after a move.
  • How timing lines up with your residency.
  • State guidance or a professional for part-year allocation.

Common mistake

Skipping a part-year return after moving: If you lived in Illinois for part of the year, that period's income generally still needs to be reported to Illinois.

Example scenario (hypothetical)

Illustration only, not your tax situation.

Example: A taxpayer moves out of Illinois in August. Vests during the Illinois period are generally Illinois-connected, and a part-year return splits the year. Later vests depend on the new state's rules.

When a CPA is worth it

  • You moved into or out of Illinois.
  • A local Chicago-area tax question arises.
  • You have vests on both sides of a move.
  • You want help with a part-year return.

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.

State residency and equity-income sourcing vary by state; examples cite California FTB guidance.

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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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