Idaho | Personal Tax Extension | Form 51 | Estimated Payment of Individual Income Tax

Modified on Wed, 12 Apr 2023 at 05:20 AM

State Abbreviation ID
State Name Idaho
Extension Status Approved Automatically
Return Due Date

April 18, 2023

Extended Due Date

October 16, 2023

Other Information
  • Idaho provides an automatic extension to October 16th.
  • At least 90% of the current year net tax liability OR 100% of the prior year's tax liability must be paid by the return due date to avoid a late payment penalty.
Online Payment Idaho | Online Tax Extension Payment
Payment Voucher Title Form 51, Estimated Payment of Individual Income Tax
State Payment Agency Idaho State Tax Commission
Mailing Address with Payment Idaho State Tax Commission
P.O. Box 83784
Boise, ID 83707-3784
Online Payment Options | Credit Card There is no fee when paying by ACH Debit. If paying by credit card or e-check, a third-party provider will charge a convenience fee. American Express, Discover, Master-Card, and Visa are accepted. To make credit/debit card, e-check, and ACH Debit payments go to: www.tax.idaho.gov/epay.
Online Payment Options | ACH Debit There is no fee when paying by ACH Debit. If paying by credit card or e-check, a third-party provider will charge a convenience fee. American Express, Discover, Master-Card, and Visa are accepted. To make credit/debit card, e-check, and ACH Debit payments go to: www.tax.idaho.gov/epay.
Failure to File Penalties Greater of $10 or 5% of unpaid tax per month, not to exceed 25% when combined with penalties for: • failure to pay; • negligence; and • substantial understatement.
Failure to Pay Penalties Greater of $10 or 0.5% of unpaid tax per month not to exceed 25% when combined with penalties for: • failure to file; • negligence; and • substantial understatement.

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