Side Hustle Profit Calculator
Calculate your true after-tax hourly rate and annual profit from any side business or freelance work.
Most side hustle income calculations stop at gross revenue or even gross profit without accounting for self-employment tax. A $2,500/month side business with $350 in expenses looks like $2,150 profit. After 15.3% self-employment tax and 25% income tax on the net, you are actually keeping closer to $1,300. Knowing the real number before starting prevents the surprise of a large tax bill in April.
Self-employment income is taxed twice before income tax: you pay both the employee and employer halves of FICA (15.3% total) on net self-employment income. You can deduct half the SE tax from gross income, but the effective rate is still significantly higher than a W-2 job at the same income level.
The self-employment tax reality
When you work for an employer, they pay half of your Social Security and Medicare taxes (7.65%). You pay the other half through payroll withholding. When self-employed, you pay both halves (15.3%) as self-employment tax. The IRS does allow you to deduct half of SE tax from gross income when calculating income tax, which reduces the effective burden slightly. But the total tax rate on self-employment income is still materially higher than equivalent W-2 income.
Deductible business expenses
Legitimate business expenses reduce net profit and therefore both SE tax and income tax. Common deductibles for side businesses: home office deduction (if used regularly and exclusively for business), business equipment and software, vehicle use for business purposes (mileage method or actual expenses), professional development, platform and subscription fees, marketing costs, and professional services (accounting, legal). Keep records and receipts. The deductions are real and meaningful.
Quarterly estimated taxes
Self-employed people with significant income are required to pay quarterly estimated taxes (due mid-April, mid-June, mid-September, mid-January). If you underpay, the IRS charges a penalty. A simple rule: set aside 25-30% of every side hustle payment in a separate account earmarked for taxes. This prevents the end-of-year tax bill from feeling like a surprise.
Frequently asked questions
At what income level do I need to file Schedule C?
If you earn $400 or more in net self-employment income in a tax year, you must file Schedule SE and pay self-employment tax. Below $400, SE tax does not apply, but you still report the income on your return.
Should I form an LLC or S-Corp for my side hustle?
An LLC provides liability protection but does not change the tax treatment unless you elect S-Corp taxation. An S-Corp election can reduce SE tax by splitting income between a "reasonable salary" (subject to payroll taxes) and a distribution (not subject to SE tax). This strategy typically makes sense when net self-employment income exceeds $40,000-$50,000/year. Below that, the accounting costs often exceed the tax savings.