Idaho State Tax Commission

Idaho State Tax Commission

Tax Commission News Release

Oct. 16 deadline nears for taxpayers with filing extensions

BOISE, IDAHO — Oct. 2, 2017 — If you haven't filed your 2016 Idaho state income taxes, the clock is ticking. Taxpayers who qualified for an automatic extension of time to file Idaho returns must send their return and full payment by Oct. 16, according to the Idaho State Tax Commission.

Idaho law allows these taxpayers to avoid a penalty for late filing, but they’ll be charged 3 percent interest on any tax that was due and not paid by April 18. 

“We expect about 25,000 individual income tax returns to be filed,” said Renee Eymann, public information officer for the Tax Commission.

Taxpayers can file returns electronically through Oct. 16. Some may qualify to file online for free. They can learn more about free e-filing by clicking on the “Free individual income tax e-file” link under the “Quick Picks” section on

Filers can pay their taxes electronically through And they can mail returns and payments to the Idaho State Tax Commission, P.O. Box 56, Boise, ID 83756-0056. 

For help computing interest, taxpayers should call (208) 334-7660 in the Boise area, (800) 972-7660 toll-free, or visit a Tax Commission office

Taxpayers who qualified for an automatic extension and are victims of Hurricane Harvey, Hurricane Irma, or Hurricane Maria have until Jan. 31, 2018, to file their returns. For more information, they can visit or call the Tax Commission. 



Posted 10-02-2017
tax pros news release general

Return to top of page

The information on this site is for general guidance only. Tax laws are complex and change regularly. We can't cover every circumstance in our website guides. We work to provide current and accurate information on our website. But some information could have technical inaccuracies or typographical errors. If there's a conflict between current tax law and the information on our website, current tax law will govern.