2025 Tax Year

Utah Side Hustle Tax Calculator

Calculate your Utah state tax (4.55%), federal tax, and self-employment tax on 1099 income.

UT4.55%

3.4 million residents

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2025 rates

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Last updated: January 2026 · Data from IRS Rev Proc 2024-40

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State

W-2 Income (from your day job)

Side Hustle Income *

Business Expenses (optional)

Utah offers side hustlers a straightforward flat tax rate of 4.55%, making tax planning simple and predictable. The Beehive State has one of the fastest-growing economies in the nation, with Salt Lake City's tech corridor (Silicon Slopes) creating numerous opportunities for freelancers and gig workers. Over 300,000 Utah residents earn self-employment income.

Utah Tax Guide

How Side Hustle Taxes Work in Utah

Utah uses a flat tax system:

**Utah state tax:** - Flat rate: 4.55% on all taxable income - No brackets—everyone pays the same percentage - Applies to net self-employment income after deductions

**No local income taxes:** - Salt Lake City and all Utah cities do not levy income taxes - You only pay the 4.55% state rate plus federal taxes

Utah's flat rate is competitive—lower than California (9.3%+), Colorado (4.4%), but higher than neighboring Nevada (0%) and Wyoming (0%).

Example

What Utah Side Hustlers Owe

Let's say you're a single filer in Salt Lake City with a $58,000 W-2 job and $18,000 in side hustle income from freelance software development, with $3,000 in business expenses.

**Your estimated taxes on the side hustle:** - Net self-employment income: $15,000 - Federal SE tax (15.3% of 92.35%): ~$2,122 - Federal income tax on side income: ~$3,300 (22% bracket) - Utah state tax (4.55%): ~$698 - **Total additional tax: ~$6,120**

Your effective rate on the side hustle is approximately 41%.

Important Dates

Utah Tax Deadlines 2025

Utah estimated tax deadlines: - **Q1**: April 15, 2025 - **Q2**: June 16, 2025 - **Q3**: September 15, 2025 - **Q4**: January 15, 2026

Use Utah Form TC-546 for state estimated tax payments.

Save Money

Common Deductions for Utah Freelancers

Utah freelancers benefit from straightforward conformity to federal taxable income. **Home office expenses**: Claim dedicated business space using simplified ($5/sq ft) or actual expense method. **Business mileage**: 67 cents/mile for 2025; important for those traveling to client sites in Salt Lake City, Provo, or across Utah. **Equipment and software**: Computers, cameras, tools, and business software are deductible—especially valuable for Utah's growing tech freelancer community in "Silicon Slopes." **Professional development**: Courses, certifications, and educational materials related to your business qualify. **Health insurance premiums**: Self-employed individuals can deduct 100% of health insurance costs. **Retirement contributions**: SEP-IRAs (up to 25% of net self-employment income) and Solo 401(k)s reduce both federal and Utah taxable income. **Marketing expenses**: Website costs, business cards, and promotional materials are deductible. Utah starts with federal taxable income, so all Schedule C deductions automatically reduce your UT taxes. Every dollar deducted saves you 4.55% in state taxes plus your federal marginal rate.

Common Questions

Utah Side Hustle Tax FAQ

What is Utah's tax rate on side hustle income?

Utah has a flat 4.55% income tax rate on all taxable income, including self-employment earnings. This rate applies regardless of how much you earn.

Does Salt Lake City have a city income tax?

No, Salt Lake City and all Utah cities do not have local income taxes. You only pay the state 4.55% flat rate plus federal taxes.

How does Utah compare to neighboring states?

Utah's 4.55% rate is higher than Nevada (0%) and Wyoming (0%), similar to Colorado (4.4%), and much lower than California (up to 13.3%).

Do I need to register my side hustle in Utah?

Most businesses need to register with the Utah Division of Corporations. If using a trade name (DBA), register a DBA with the Division. LLCs must register with the Division of Corporations. Sellers may need a Sales Tax License from the Utah State Tax Commission.

When are Utah quarterly estimated taxes due?

Utah follows federal quarterly deadlines: April 15, June 16, September 15, and January 15. Use Form TC-546 for payments. Estimated payments are required if you expect to owe $1,000 or more.

Can I deduct retirement contributions on Utah taxes?

Yes, SEP-IRA and Solo 401(k) contributions reduce your federal taxable income, which Utah uses as its starting point. Every dollar contributed saves you at your federal rate plus 4.55% in Utah taxes.

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