2025 Tax Year

California Side Hustle Tax Calculator

Calculate your California state tax (9.30%), federal tax, and self-employment tax on 1099 income.

CA9.30%

39 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)

California leads the nation in side hustle activity, with over 4 million residents earning freelance or gig income. Whether you're driving for Uber in LA, selling crafts on Etsy from San Francisco, or freelancing from San Diego, understanding your tax obligations is crucial. The Golden State has some of the highest state income tax rates in the country, ranging from 1% to 13.3%.

California Tax Guide

How Side Hustle Taxes Work in California

California uses a progressive income tax system with nine brackets. For most side hustlers earning between $10,000 and $50,000 in self-employment income, you'll likely fall in the 6% to 9.3% bracket range. California taxes all income earned within the state, including 1099 and cash payments from gig work.

Key points for California side hustlers: - **Progressive rates**: 1% to 13.3% depending on total taxable income - **Mental Health Services Tax**: Additional 1% on income over $1 million - **No local income taxes**: Unlike some states, CA cities don't add their own income tax - **Franchise Tax Board**: California's tax authority (not the IRS) handles state taxes

Example

What California Side Hustlers Owe

Let's say you're a single filer in California with a $60,000 W-2 job and $15,000 in side hustle income from freelance graphic design, with $2,000 in business expenses.

**Your estimated taxes on the side hustle:** - Net self-employment income: $13,000 - Federal SE tax (15.3% of 92.35%): ~$1,839 - Federal income tax on side income: ~$2,860 (22% bracket) - California state tax: ~$1,209 (9.3% bracket) - **Total additional tax: ~$5,908**

This means roughly 45% of your net side hustle income goes to taxes. The good news? You can deduct half of SE tax and potentially qualify for the 20% QBI deduction.

Important Dates

California Tax Deadlines 2025

California follows federal quarterly estimated tax deadlines: - **Q1**: April 15, 2025 - **Q2**: June 16, 2025 - **Q3**: September 15, 2025 - **Q4**: January 15, 2026

California requires estimated payments if you expect to owe $500 or more in state taxes. Use Form 540-ES for state quarterly payments.

Save Money

Common Deductions for California Freelancers

California freelancers have numerous deduction opportunities to reduce their tax burden. **Home office expenses** are deductible if you have a dedicated space used regularly and exclusively for business—use the simplified method ($5/sq ft up to 300 sq ft) or calculate actual expenses. **Vehicle mileage** for business use is 67 cents/mile for 2025, crucial for rideshare drivers and delivery workers. **Equipment and software** including computers, cameras, and subscriptions (Adobe, Canva, accounting software) are deductible. **Health insurance premiums** are fully deductible for self-employed individuals. **Professional development** including courses, certifications, and industry conferences qualifies. **Retirement contributions** to SEP-IRAs (up to 25% of net self-employment income) or Solo 401(k)s reduce both federal and California taxable income. Important: California does NOT conform to all federal deductions—the FTB has specific rules, so verify California-specific treatment for items like bonus depreciation.

Common Questions

California Side Hustle Tax FAQ

Do I need to pay California taxes on my side hustle?

Yes, California taxes all income earned by residents, including self-employment income from side hustles, 1099 work, and gig economy jobs like rideshare or delivery.

What is California's self-employment tax rate?

California doesn't have a separate self-employment tax—that's federal (15.3%). However, your side hustle income is subject to California income tax rates of 1% to 13.3% depending on your total income.

Can I deduct my side hustle expenses in California?

Yes, you can deduct ordinary and necessary business expenses from your side hustle income. This reduces both your federal and California taxable income.

Do any California cities have additional income taxes on side hustles?

No, California cities and counties do not levy local income taxes. You only pay state income tax to the Franchise Tax Board (FTB). However, some cities require business licenses or permits for certain types of side hustles.

When do I need to make quarterly tax payments in California?

California requires quarterly estimated payments if you expect to owe $500 or more in state taxes. Use Form 540-ES with deadlines of April 15, June 16, September 15, and January 15. This threshold is lower than the federal $1,000 requirement.

Can I deduct SEP-IRA or Solo 401(k) contributions on my California taxes?

Yes, California allows deductions for retirement contributions to SEP-IRAs, SIMPLE IRAs, and Solo 401(k)s. For 2025, you can contribute up to 25% of net self-employment income to a SEP-IRA, reducing both federal and California taxable income.

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