Utah Mileage Deduction 2026: 4.5% Flat Tax

Utah's flat income tax was just reduced to 4.5%, down from 4.55%. At 15,000 business miles, you save roughly $489 in state taxes on top of about $4,056 in federal income and self-employment tax savings. That is about $4,545 back for keeping a mileage log. Utah also offers a nonrefundable taxpayer tax credit that partially offsets the flat rate for many filers, so your effective state rate may be slightly lower than the headline 4.5%.

Here is how that credit works: Utah applies its 4.5% rate to your gross income, then offsets it with a Taxpayer Tax Credit equal to 6% of your federal deductions and exemptions. The credit phases out at higher incomes. The practical effect is that Utah's "flat tax" is actually progressive, high earners lose the credit and pay the full 4.5%, while moderate earners get a lower effective rate.

How to File

Deduct your business miles on federal Schedule C, Line 9 at 72.5¢/mile. Utah starts with your federal adjusted gross income, so the mileage deduction flows through to your state return automatically. Keep a mileage log with the date, destination, purpose, and miles for each trip. If you expect to owe more than $1,000 in combined state taxes, make quarterly estimated payments.

The state does not require employers to reimburse mileage. If you drive for work, tracking is the only way to get the money back.

FAQ

Does Utah require mileage reimbursement?

No. Utah has no state law requiring private employers to reimburse mileage.

Does my mileage deduction reduce Utah state taxes?

Yes. Utah uses your federal adjusted gross income as the starting point. Your Schedule C mileage deduction reduces that number, which directly reduces your state tax.

Can W-2 employees deduct mileage in Utah?

No. The mileage deduction for W-2 employees was permanently eliminated under the One Big Beautiful Bill. If your employer does not reimburse, you have no tax remedy.

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