Idaho State Tax Commission

Penalty & Interest Estimator

tax.idaho.gov/piest

2019 income tax filing and payment deadline now June 15. Read our news release.

This form is to help you estimate your penalty and interest. Please make sure to choose the correct tax type before entering your information. Contact us if you have questions that aren't answered on this website.

Step 1 of 5: Choose the tax type (Idaho form used)

Calculate penalty and interest for:

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Last updated November 26, 2019

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.