Iowa Withholding Analyzer 2026
Are you over-withholding or under-withholding in Iowa (IA)? Iowa has a 3.8% flat state income tax. Enter your pay stub details to compare your year-to-date withholding against your projected tax liability and get actionable W-4 recommendations.
Note: Transitioning to flat rate; deductions differ
Pay Stub Info
Enter your pay stub info to analyze withholding
How Withholding Works in Iowa
Iowa has a flat income tax rate of 3.8%. Your employer withholds this percentage from every paycheck in addition to federal income tax and FICA. Because the rate is flat, state withholding in Iowa is generally straightforward and less likely to result in large over- or under-withholding compared to progressive-rate states.
The most common reasons for withholding mismatches in Iowa include having multiple income sources, significant itemized deductions, large capital gains or investment income not subject to withholding, or mid-year changes in employment. If any of these apply, review your state withholding form alongside your federal W-4.
Advertiser Disclosure: Some of the products featured on this page are from our partners who may compensate us. This may influence which products we write about and where they appear on the page. However, this does not influence our evaluations. Our opinions are our own.
Tax Tools
File Taxes Online
Free federal filingFree federal filing for simple returns. State filing from $29.
File NowOpen a Roth IRA
No minimumsNo account minimums. Thousands of commission-free ETFs and mutual funds.
Open IRATop Cash Back Card
2% unlimited cash backEarn unlimited 2% cash back on every purchase with no annual fee.
Apply NowSubject to credit approval.