Free Side Hustle Tax Calculator - Calculate Your Tax Liability
Calculate estimated taxes on your side hustle income
Formula & Methodology
Side hustle income is subject to two distinct types of federal tax: the standard progressive income tax, and the 15.3% Self-Employment tax. Because this income sits 'on top' of any W-2 income you already earn, it is typically taxed at your highest marginal federal and state brackets.
- Net Profit = Side Hustle Income - Business Expenses
- Self-Employment Tax = (Net Profit × 0.9235) × 15.3%
- Federal Income Tax = Net Profit × Marginal Tax Rate (or fixed percentage)
- State/Local Tax = Net Profit × State Tax Rate
- Total Taxes = Self-Employment Tax + Federal Income Tax + State/Local Tax
Worked Example
Using the Side Hustle Tax Calculator: apply the formula above to your input values. For instance, Net Profit = Side Hustle Income - Business Expenses, then Self-Employment Tax = (Net Profit × 0.9235) × 15.3%. The tool performs each step instantly and shows the result.
Frequently Asked Questions
Is side hustle income taxed differently?
It is subject to both regular income tax and the 15.3% self-employment tax, and it usually stacks on top of your day-job income at your highest brackets.
Can I deduct side hustle expenses?
Yes. Legitimate business costs reduce your net profit, which is the figure that both income tax and self-employment tax are calculated on.
Should I set money aside for these taxes?
Setting aside roughly 25-35% of net profit is a common rule so you are not caught short when estimated payments or the annual bill come due.