Individual Income Tax Filing

Due date

File your return and pay any tax due on or before April 18, 2023, for the 2022 calendar year.

Please contact us if you forgot to file a tax return.


You can choose to file electronically, saving time and postage. If you choose to e-file both your federal and state returns, you must use the same tax software to do so.

  • These tax software packages enable you to prepare and electronically file your federal and Idaho individual income tax forms for free if you meet certain criteria.

If you don’t qualify for free filing, or don’t want to use tax software:

Need more time to file? See if you qualify. Read our guide on valid extensions for filing.


For information about your refund, see the Tax Refund page.

Amended returns

Double-check your tax return before you mail it or submit it through an online e-filing service. (Note: An amended return can delay completion of other returns we’re processing.)

You can correct a return you’ve already filed by filing an amended return. Follow these steps:

  1. Check which return you originally filed – Form 40 or Form 43. Download a blank copy.
  2. Check the AMENDED box at the top of the blank return.
  3. Complete the return as it should have been filled out.
  4. Attach an explanation of why you’re amending the return.
  5. If you need to, include copies of forms or schedules missing from the original filing.
  6. If your federal return was amended, attach a copy of Form 1040X.
  7. Mail your amended return, any supporting documentation and any payment due to:
    Idaho State Tax Commission, PO Box 56, Boise ID 83756-0056.

Requirement to file

You’re required to file if your gross income is above a certain amount (see below). Gross income means all income from all sources before applying expenses or deductions. This income includes wages, interest, rents, dividends, gains from property sales, and gross business income.

Read the Idaho Source Income guide and income tax instructions (see next section) for more information.

Idaho residents

pdf Form 40 is the Idaho income tax return for Idaho residents. pdf Instructions are in a separate file.

Idaho residents must file if their gross income for 2022 is at least:

Age as of the last day of 2022:Gross income for 2022 is at least:
Single – under age 65$12,950
Single – age 65 or older$14,700
Married (filing separately) – any age$5
Married (filing jointly) – both under age 65$25,900
Married (filing jointly) – one age 65 or older$27,300
Married (filing jointly) – both age 65 or older$28,700
Head of household – under age 65$19,400
Head of household – age 65 or older$21,150
Qualifying widow(er) – under age 65$25,900
Qualifying widow(er) – age 65 or older$27,300

Part-year Idaho residents

pdf Form 43 is the Idaho income tax return for part-year Idaho residents. pdf Instructions are in a separate file.

Part-year Idaho residents must file if their total gross income from the following sources combined is more than $2,500:

  • All sources while an Idaho resident
  • Idaho-source income while a nonresident


pdf Form 43 is the Idaho income tax return for nonresidents with income from Idaho sources. pdf Instructions are in a separate file.

Nonresidents of Idaho must file if their total gross income from Idaho sources is more than $2,500.

Find detailed examples in our Idaho Residency Status and Idaho Source Income guides.

Tax rates

Income tax rates for 2022 range from 1% to 6% on Idaho taxable income. Individual income tax is graduated. This means that Idaho taxes higher earnings at a higher rate.

Keeping records

Keep copies of your tax returns and all supporting documentation for at least seven years.