If you owe taxes, you may receive a call from our Phone Power unit at (855) 556-4230. You can return calls to this toll-free number, or call it if you have a question about the amount you owe.
Avoiding a tax debt
You should always file your return on time and pay as much as you can when you file. Filing on time will reduce your penalties for any unpaid taxes.
Use our penalty and interest estimator to calculate what you may owe for certain tax types.
Make payments before the due date
Although Idaho doesn't require estimated tax payments for individuals, you may make payments toward your future tax debt any time during the tax year and until the due date. We accept cash, checks, money orders, credit cards, ACH credit, and ACH debit payments.
(Note: If you pay with a credit/debit card or e-check, our third-party provider will charge a convenience fee. These fees are not initiated or collected by the Idaho State Tax Commission.)
You can make payments:
- In person at our Boise office or at our other offices. (We recommend you don't leave cash in a drop box.)
- Online by credit/debit card or e-check. The credit cards we accept are: American Express, Discover, MasterCard, and Visa.
Adjust your W-4 amount
If you owe taxes because not enough money was withheld from your wages, you should file a new Form W-4, Employee's Withholding Allowance Certificate, with your employer(s) to claim a lower number of withholding allowances. You may submit a separate Form W-4 for Idaho withholding to your employer if you wish. Certain deductions, such as Earned Income Credit, are only applicable to federal tax calculations. Therefore, if you use the federal worksheet to determine Idaho withholding you may not withhold enough for Idaho purposes. Instead, calculate your total household income and refer to the tables in the back of the Guide to Income Tax Withholding to determine the most appropriate amount to withhold each pay period.
If you're self-employed and owe tax, you can make estimated tax payments. Individual income tax filers can use Form 51, Estimated Payment of Idaho Individual Income Tax, and businesses can use Form 41ES, Quarterly Estimated Tax / Extension of Time Payment. You're not restricted on the frequency or timing of any estimated payments you make during the year, as long as they're received by the due date of the return.
Double-check your tax return
Carefully checking your tax return for accuracy and completeness before you file will help you avoid unexpected adjustments to your tax balance due to errors. Review these six tips for filing Idaho income taxes.