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Find your Illinois tax account info

Set up an existing company

Withholding Tax

The Department of Revenue issues you an income tax withholding taxpayer ID. Your taxpayer ID will consist of your Federal EIN and an additional Sequence number (usually -000, but can sometimes be -001). You'll need to enter the correct Sequence number in Gusto.

  • Most newer employers in Illinois will have a -000 sequence number.
  • You can find the taxpayer ID on your Illinois Withholding Income Tax Return (IL-941).

If you're unsure about your taxpayer ID number, especially the Sequence number, contact (800) 732-8866.

Unemployment Tax

Your Unemployment account number and your Illinois UI Contribution Rate will be on the Notice of Contribution Rate that you receive from the Illinois Department of Employment Security (IDES) each year. Keep in mind, your unemployment tax number is not the same as your FEIN.

When entering your UI Contribution Rate, include the Fund Builder Rate in your total Unemployment Tax Rate entered in Gusto.

If you're unsure about your rate, call the agency at (800) 247-4984 or look up your current rate on the state agency website.

Click here to view state-by-state UI rate information and wage bases.

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