Penalty & Interest Estimator
This form is to help you estimate your penalty and interest; therefore, it can't be used in all circumstances and shouldn't be considered accurate. Please 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:
- Income tax for individuals » (Forms 40 or 43)
- Income tax for businesses » (Forms 41, 41S, 65, or 66)
- Sales or use tax » (Form 850)
- Withholding payment » (Form 910)
- Withholding annual reconciliation » (Form 967)
Did you know?
- In many cases, your penalty can be greatly reduced by filing your tax return on time, even if you can't pay.
- If you e-file your tax return, your penalty and interest will be calculated for you when you file.
