Iowa Mileage Deduction 2026: New 3.8% Flat Tax + Federal Savings

Iowa moved to a flat 3.8% income tax effective 2026. The flat structure replaces the prior graduated brackets and makes the math simple. At 15,000 business miles and the 2026 IRS rate of 72.5 cents per mile, your combined federal and Iowa savings come out to about $4,469.

W-2 employee in Iowa? Your employer may owe you reimbursement under Iowa Code §91A.3(7), with 5% per day liquidated damages for late payment. See our Iowa reimbursement guide.

The New Flat 3.8% Tax

Iowa completed its multi-year transition to a flat tax in 2026. Every dollar of taxable income above the personal exemption is taxed at the same 3.8% rate. For self-employed workers tracking mileage, the practical effect is:

• Easier estimated-payment math (one rate, no bracket changes mid-year)
• Predictable state savings on every dollar deducted
• No bracket-bumping concerns from large mileage write-downs

Federal + State Deduction Math

At 15,000 business miles and the 2026 IRS rate of 72.5 cents per mile, the federal Schedule C deduction is $10,875.

• Federal income tax savings (22% bracket): $2,393
• Self-employment tax savings (15.3%): $1,664
• Iowa state tax savings (3.8% flat): $413
• Combined total: roughly $4,470

Iowa starts with your federal adjusted gross income, so the deduction flows through to your state return automatically.

Iowa's Driving Economy

• Agricultural sales and crop services across the Corn Belt
• Delivery drivers for regional distributors covering small-town routes
• Home health workers in rural service areas
• Mobile trades between Cedar Rapids, Des Moines, Davenport, and Sioux City

How to Claim

Self-employed: deduct on Schedule C, Line 9. Keep a mileage log with the date, destination, purpose, and miles for each trip. The flat rate makes quarterly estimated payments easy to calculate.

W-2 employees: no federal deduction is available. The deduction was permanently eliminated under the One Big Beautiful Bill. Iowa Code §91A.3(7) may require your employer to reimburse you instead. See the reimbursement guide.

FAQ

Does my mileage deduction reduce Iowa state taxes?

Yes. Iowa uses your federal adjusted gross income as the starting point. Your Schedule C mileage deduction reduces that number, which directly reduces your state tax at the flat 3.8% rate.

What is the 2026 mileage rate in Iowa?

The IRS rate of 72.5 cents per mile applies in Iowa as in every state. Iowa does not set its own rate.

Can W-2 employees deduct mileage in Iowa?

No, not on a federal return. The deduction was permanently eliminated. Iowa Code §91A.3(7) may require your employer to reimburse you instead. See the reimbursement guide.

How much can a self-employed Iowa driver save?

At 15,000 business miles, roughly $4,470 combined federal, self-employment, and Iowa state tax savings. At 25,000 miles, roughly $7,450.

Cornfield to client site, every mile is deductible. Start free with TruMile →