Idaho State Tax Commission

Withholding guide updated with new Idaho W-4

Employers: We’ve updated A Guide to Idaho Income Tax Withholding as of January 7 to include the new 2019 Form ID W-4.  Employees should use the Idaho W-4 to calculate their Idaho allowances and any extra state withholding. The form is also available at  We recommend that all employees update their withholding using the Idaho W-4.

No changes have been made to the withholding tables. 

Posted 01-15-2019
tax pros general

This information is for general guidance only. Tax laws are complex and change regularly. We can't cover every circumstance in our guides. This guidance may not apply to your situation. Please contact us with any questions. We work to provide current and accurate information. But some information could have technical inaccuracies or typographical errors. If there's a conflict between current tax law and this information, current tax law will govern.