Side Hustle Tax Estimator: 2026 Free Calculator & Guide
Any side hustle earning $400+ triggers self-employment tax on top of your day-job's federal income tax. Use our free [side hustle tax estimator](https://gigmytax.com/calculators/self-employed-tax-estimator) to see exactly what you owe once your W-2 and 1099 income are stacked together.
How side hustle taxes actually work
Your W-2 wages fill up the federal brackets first. Your 1099 side hustle income sits *on top* of that — often taxed at a higher marginal rate than your day job. Plus you owe 15.3% self-employment tax on the net side-hustle profit (income − expenses).
The three taxes on side hustle income
**Federal income tax** at your marginal bracket (12–37%). **Self-employment tax** at 15.3% on net profit (12.4% Social Security up to $176,100 combined wages + 2.9% Medicare uncapped). **State income tax** where applicable.
What our estimator asks for
Filing status, W-2 wages, W-2 withholding, side-hustle gross income, business miles, other business expenses, health insurance premiums, retirement contributions, and state. Outputs federal tax, SE tax, state tax, refund/owed, and a % to save per side-hustle payout.
The 28% side hustle rule of thumb
Set aside **28% of every side-hustle payout** into a separate savings account. Covers 15.3% SE tax + ~12% federal + a small state buffer for most middle-income side hustlers.
When you need to pay quarterly
If side-hustle profit will push you past $1,000 owed at year-end (after W-2 withholding), you owe quarterly 1040-ES payments — Apr 15, Jun 16, Sep 15, Jan 15. Or increase W-4 withholding at your day job to cover it.
Deductions built into the estimator
Mileage at $0.70/mi, home office (simplified $5/sqft), phone %, supplies, software, subscriptions, health insurance, SEP-IRA/Solo 401(k). Every $1,000 of deduction saves ~$280 in tax for most side hustlers.
Common side hustles this estimator fits
Freelance design and writing, Etsy sellers, Airbnb hosts, tutoring, consulting, weekend Uber/Lyft/DoorDash, TikTok/YouTube creators, affiliate marketers, dog walking, virtual assistant, coaching.
Related calculators
For platform-specific numbers, use the [rideshare](https://gigmytax.com/calculators/rideshare-tax), [delivery driver](https://gigmytax.com/calculators/delivery-driver-tax), [creator](https://gigmytax.com/calculators/creator-tax), or [freelancer quarterly](https://gigmytax.com/calculators/freelancer-quarterly-tax) calculators.
Frequently asked questions
+How much tax do I owe on side hustle income?
Typically 25–35% of net side-hustle profit, depending on your marginal federal bracket and state. Use the estimator above for a precise number.
+Do I have to report side hustle income under $600?
Yes. The $600 threshold is only for whether the payer must send a 1099 — all income is taxable regardless of paperwork.
+Can I deduct expenses from side hustle income?
Yes — all ordinary and necessary business expenses on Schedule C. Mileage, home office, phone, supplies, software, marketing, and more.
+Should I set up an LLC for my side hustle?
An LLC changes nothing for taxes — sole prop and single-member LLC both file Schedule C. Consider it only for liability protection or when profit exceeds ~$80–100K (S-Corp election).
+How do I avoid a huge tax bill in April?
Set aside 28% of every side-hustle payout, or increase W-4 withholding at your day job so total withholding covers 100% of last year's tax.
Related calculators
- Side Hustle Tax CalculatorEstimate tax on side-gig 1099 income stacked on your W-2.
- Self-Employed Tax EstimatorEstimate federal, SE, and state tax for your full 1099 year.
- Side Hustle Taxes CalculatorFederal + SE + state tax on side income for 2026.
- Self-Employment Tax CalculatorCalculate the 15.3% SECA tax on your net 1099 income.
Related guides
- Side Hustle Taxes: The Complete 2026 GuideHow side hustle taxes work in 2026: 1099 rules, SE tax, quarterly payments, and how to stack a side gig on top of a W-2 job.
- Quarterly Taxes for Freelancers: The 2026 GuideHow freelancers pay 2026 quarterly estimated taxes. Due dates, safe-harbor rules, penalty math, and step-by-step instructions using IRS Direct Pay or EFTPS.
- How Much Should I Save for Taxes as a Self-Employed Worker in 2026The exact % of every 1099 payout to save for taxes in 2026. Covers federal, self-employment, and state tax for freelancers, gig workers, and contractors.
- 1099 Tax Guide for Beginners: The 2026 WalkthroughNew to 1099 income? This beginner's guide covers forms, quarterly taxes, deductions, SE tax, and how to file — everything you need for the 2026 tax year.
- Self-Employment Tax Explained: 2026 Rates, Rules, and MathSelf-employment tax explained in plain English: 15.3% breakdown, the 92.35% adjustment, the ½ SE deduction, thresholds, and how to pay it in 2026.