General Instructions

The Idaho State Tax Commission may grant you an automatic six-month extension if you cannot file your Idaho individual income taxes by April 15, 2015. To qualify, you need to pay either an estimated 80% of the tax you owe for the current tax year or 100% of what you paid for state income taxes the prior year by April 15, 2015.

To see if you meet the extension requirements, complete the worksheet on Idaho Form 51 and calculate the 80%.

An extension to file your return is not an extension of time to pay your taxes. To avoid an extension underpayment penalty you must pay at least 80% of the tax due by April 15, 2015.

If you owe taxes, payment must be made by April 15, 2015 or penalty and interest will be assessed. If you cannot meet the filing deadline, you should apply for an extension. The extension allows additional time to complete and file your income tax return; however, the extension does not provide additional time to pay the amount of tax owed.

To avoid penalties, you must pay 80% of your current year’s income tax liability or 100% of the income tax reported on your income tax return for the preceding year, if one was filed, by April 15, 2015. If you will owe $50 or less, a payment isn’t required in order to have a valid extension of time to file your return. However, interest will be charged.

Pay your taxes online at Access Idaho. Most major credit cards, as well as Visa or MasterCard branded debit cards, and E-Check are accepted. There is a convenience fee charged when paying via credit card or E-Check.

Pay by ACH Debit at Idaho Taxpayer Access Point.

You can also pay online at Official Payments Corporation. Visa, MasterCard, Discover Network, and American Express credit and debit cards, and other forms of payment, such as Bill Me Later® are accepted. To make a debit card payment you can use a MasterCard or Visa Debit Card or any debit card with Nyce, Pulse or Star logos.

There is a convenience fee for this service which is paid directly to the company. The amount of the fee is based on the amount of your payment.

Pay your taxes by phone by calling Official Payments toll-free at 1-800-272-9829. This automated service is available 24 hours, 7 days a week. At the end of your call you will be given a confirmation number. Save this as proof of payment for your records.

There is a convenience fee for this service which is paid directly to the company. The amount of the fee is based on the amount of your payment.

Along with the extension form, send a check or money order in the amount of the estimated tax due made payable to Idaho State Tax Commission. Mail to:
Idaho State Tax Commission
PO Box 83784
Boise, ID 83707-3784

There’s a three-year-expiration date for claiming a refund, beginning on the original due date of your income tax return. The "original due date" is the April 15 following the tax year (except when it falls on a weekend or holiday). Extensions of time to file don’t change the original due date for the three-year refund claim period; after that time, a refund won’t be issued.

For more information, visit The Idaho State Tax Commission