Welcome to the Iowa Department of Revenue

The mission of the Iowa Department of Revenue is to serve Iowans and support state government by collecting all taxes required by law, but no more.

Tax Time Begins January 27!
Access important tax resources including forms, expanded instructions, and other helpful information.

Still have questions? We've extended our hours during tax time!
Welcome to the new Website!
Learn about all the new features and functionality of the new website.
Iowa Withholding Calculator
Need to change your 2019 Iowa withholding amount? Calculate before you complete a new W-4.


IDR Releases New State Tax Guidance: Iowa Nonconformity; IA 4562 A&B Form Updates
February 17, 2020

In December of 2019, President Trump signed the Taxpayer Certainty and Disaster Tax Relief Act of 2019 into law. This Act extends a number of expired federal tax provisions, many retroactively to tax years 2018 and 2019. Iowa has not conformed with any of these federal tax changes to the extent they apply to tax years beginning prior to January 1, 2020.

Proposed Administrative Rules Available for Public Comment
February 13, 2020
The Department of Revenue has submitted new proposed rules to the Iowa Legislature, available for public comment through March 3, 2020. See individual notices for details (Sales and Use Tax Exemption on Grain Bins...; Sales and Use Tax Exemption for Manufacturers...)
IDR State Tax Reform Guidance: Built-in Gains Tax on S Corporations
January 27, 2020

In 2018, the Iowa legislature enacted Senate File 2417, a state tax reform bill that includes extensive changes to the state’s tax structure. The Department has released guidance to explain the following tax change:

IDR Helps you Prepare for Tax Time
January 27, 2020
With tax filing season upon us, the Iowa Department of Revenue is reminding Iowans of the many resources available and recent changes at the Department that can assist taxpayers with filing their tax return. The Department will begin processing returns at the same time as the IRS on January 27th. This is because Iowa taxpayers are required to provide their federal return with their Iowa return.
IDR Releases New State Tax Guidance: Tax Preparers; GILTI; FDII
November 21, 2019

In May 2019, the Iowa legislature enacted House File 590, a bill providing requirements and penalties for tax return preparers. The Department has released new guidance to explain the provisions of this act:

IDR Issues New Income Withholding Tax Tables for 2020
November 04, 2019

Des Moines, Iowa – The Iowa Department of Revenue is issuing updated income tax withholding tables for 2020 to continue to align Iowa withholding with recent changes in state tax laws.

For individuals, this means that employers will be reducing the amount of Iowa tax withheld from employees’ paychecks, beginning January 1, 2020, increasing take-home wages for individuals.