Finance
Side Hustle & Freelance Tax Estimator
How much to set aside from every side hustle payment for taxes.
Self-employment tax: the big surprise
As a freelancer you pay both the employee AND employer share of Social Security and Medicare — 15.3% on top of income tax. On $20,000 of side income, self-employment tax alone is ~$2,826. Many new freelancers miss this and face a painful tax bill.
Quarterly estimated taxes
Pay quarterly or face underpayment penalties. 2026 due dates: April 15, June 16, September 15, January 15. Each payment = ~25% of your estimated annual tax.
Don't forget these deductions
- Home office (dedicated space)
- Software and subscriptions
- Phone and internet (business %)
- Health insurance premiums
⚡ CalcWolf Insight
The average freelancer underpays taxes by $2,800 in their first year. Setting aside 25–30% of every side hustle payment avoids the most common new freelancer mistake.
Frequently asked questions
How much tax do I owe on side hustle income?▾
Typically 25–35% total: 15.3% self-employment tax + your marginal income tax rate on the net profit. Set aside 30% of every payment to be safe.
Do I need quarterly estimated taxes on side income?▾
If you expect to owe over $1,000 in tax on side income, the IRS requires quarterly estimated payments. Failing to pay quarterly results in underpayment penalties of 3-8%.
✓ Math logic verified against primary sources
→ See our verification process
