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  Maintenance Notice

The Department of Revenue is performing emergency maintenance on the Cook County Taxpayer Portal. The Portal will be unavailable on May 30th, from 3:00PM to approximately 4:00PM. Thank you for your patience while we perform important updates to the Portal.

  Home Rule Tax Update

Welcome to the Online Taxpayer portal!


Cook County Department of Revenue will be switching to a new ACH provider by the end of June. In preparation for this change, if you have previously provided your financial institution with a Company ID to allow ACH debits, please have them add the new Company ID, 0000408976. We recommend making this update prior to your next payment to avoid rejected payments that may be caused by a debit block on your account. The existing Company ID should remain in place until July.

During the transition process, the ability to schedule future payments will be temporarily disabled. When the new payment platform is in place you will be required to reenter your bank’s routing and account numbers for any accounts previously stored on the Portal.

We apologize for the inconvenience and thank you for your patience.

Online Taxpayer Portal

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