Recent changes in the Idaho state tax laws have adjusted the tax tables for the amount of income taxes to be withheld from employee paychecks.

It is recommended by the Idaho State Tax Commission that employees with Idaho Income Tax Withholding review their Form W-4, now to ensure the right amount of federal and state income taxes is withheld from your paycheck.

Using the federal allowance number for Idaho could cause miscalculations for your Idaho withholding. If you don’t withhold enough tax, you could have an unexpected tax bill when you file your 2018 income tax return. Below are the recommended steps to take:

  1. Use the withholding calculator  to estimate your federal withholding.
  2. Use the 2018 W-4 Worksheet for Idaho to estimate your Idaho withholding.
  3. Make any needed changes to Form W-4 with Helpside.

The changes making the biggest impact on federal and state taxes include lowered income tax rates, increased standard deduction, elimination of the personal and dependent exemptions, and limitation or elimination of most itemized deductions. Idaho also created a new Child Tax Credit. All these changes have significantly affected your federal and Idaho withholding.

For more information about withholding, visit the W-4 page at If you have further questions about tax withholding, it is recommenced that you speak with a certified tax professional.