Side Hustle Income Tax Calculator
Working a W-2 job and freelancing on the side? This calculator shows the exact tax impact of your side income — including SE tax, additional withholding needed, and quarterly payment amounts.
Side Hustle Income Tax Calculator
Estimate additional taxes from self employment income
SE tax is 15.3% on 92.35% of net self employment income (12.4% Social Security + 2.9% Medicare). Federal tax uses 2026 brackets after standard deduction and 50% SE tax deduction. Quarterly payments are due April 15, June 15, September 15, and January 15.
Frequently Asked Questions
How much tax do I owe on side hustle income?+
Side hustle income is taxed at your marginal rate (your W-2 pushes you into a higher bracket). On $30,000 of side income with a $70,000 W-2: you pay ~$4,600 in SE tax (15.3% on 92.35%) plus ~$4,800 in additional income tax (at 22-24% marginal). Total: ~$9,400.
Should I adjust my W-2 withholding for side income?+
Yes. Use the IRS Tax Withholding Estimator (irs.gov) to increase your W-2 withholding to cover side income taxes. This avoids quarterly payments and underpayment penalties. The extra withholding is spread across each paycheck, reducing the cash flow impact.
Can I deduct side hustle expenses against my W-2 income?+
No. Side hustle deductions (Schedule C) only offset side hustle income. But the SE tax deduction, health insurance deduction, and retirement contributions reduce your total taxable income. Business losses can offset W-2 income in some cases (but not hobby losses).
How much tax do I owe on side hustle income?
Side hustle income is taxed at your marginal rate (your W-2 pushes you into a higher bracket). On $30,000 of side income with a $70,000 W-2: you pay ~$4,600 in SE tax (15.3% on 92.35%) plus ~$4,800 in additional income tax (at 22-24% marginal). Total: ~$9,400.