2023 Idaho State Tax Deadlines

Idaho Individual Income Tax Filing deadlines and extensions for 2023.

If you are a resident or have been involved in significant business operations within Idaho then you might be required to file Idaho State Taxes. We look at the most important tax deadlines and tax extensions for Idaho in 2023.

C Corporation

Idaho C Corporation Tax Deadlines for 2023

You must file & pay Corporate Income Taxes in Idaho by April 16, 2024

Applicable forms: 

Form 41 - Corporation Income Tax Return

Extension to File Taxes in Idaho for 2023

You must send payment for taxes in Idaho for the fiscal year 2022 by April 16, 2024.

The Extension Deadline is October 15, 2024 to file your Idaho income tax return.

Idaho automatically grants 6 months extensions on filing corporate income tax returns. This means you do not need to file for an extension in Idaho.

This is an extension to FILE, not an extension to PAY - payment is still due April 16, 2024

Pass-Throughs

Idaho S Corporation & Partnership Tax Deadlines for 2023

You must file in Idaho by April 16, 2024.

Extension to File S Corporation & Partnership Taxes in Idaho for 2023

You must send payment for taxes in Idaho for the fiscal year 2023 by April 16, 2024.

The Extension Deadline is October 15, 2024 to file your Idaho income tax return.

Idaho automatically grants 6 months extensions on filing pass-through entity income tax returns. This means you do not need to file for an extension in Idaho.

This is an extension to FILE, not an extension to PAY - payment is still due April 16, 2024

Form 41S

Idaho Individual Tax Deadlines for 2023

Estimated Tax Deadline for Idaho 2023

Estimated tax payments are made:  

  • April 18, 2023
  • June 15, 2023 
  • September 15, 2023
  • January 15, 2024

See Form-51 for the amount to pay with each voucher.

Individual Tax Deadline for Idaho 2023

You must file & pay Individual Income Taxes in Idaho by April 16, 2024

File Online Idaho Tax Online

File by Mail must be postmarked by the due date

Applicable forms:

Form 40 - Full Time Resident

Form 43 - Part-Year & Nonresidents

Extension to File Taxes in Idaho for 2023

You must send payment for taxes in Idaho for the fiscal year 2023 by April 16, 2024.

The Extension Deadline is October 15, 2024 to file your Idaho Individual Income tax return.
Idaho automatically grants 6 months extensions on filing personal income taxes. This means you do not need to file for an extension in Idaho.

This is an extension to FILE, not an extension to PAY - payment is still due April 16, 2024

Estates Tax Deadline for Idaho in 2023

Idaho no longer requires individuals to pay Estate Tax.

Farmer and Fisherman Taxes for Idaho 2023

If at least 2/3 of your gross income for the taxable year is derived from farming, you may pay estimated tax at any time on or before January 15, 2024. If you wait until January 15, 2024, you must pay the entire balance of the estimated tax. However, if farmers file their tax return on or before March 1, 2024, and pay the total tax at that time, they need not file estimated tax

Sources

The material discussed on this page is meant for general illustration and/or informational purposes only and is not to be construed as investment, tax, or legal advice. You must exercise your own independent professional judgment, recognizing that advice should not be based on unreasonable factual or legal assumptions or unreasonably rely upon representations of the client or others. Further, any advice you provide in connection with tax return preparation must comply in full with the requirements of IRS Circular 230.

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