Side Hustle Tax Calculator
Self-employment tax owed on side income.
Enter your values
Enter the side hustle income you are working with.
Enter the business expenses you are working with.
Enter the marginal income tax rate in %.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Estimated total tax owed
- $3,612.96
- Net profit
- $10,000.00
- Self-employment tax
- $1,412.96
- Income tax (est.)
- $2,200.00
- Suggested quarterly set-aside
- $903.24
Quick answer
Self-employment tax is 15.3% of net earnings (92.35% of profit), plus your marginal income tax rate.
SE tax = profit x 0.9235 x 15.3%; total = SE tax + income tax rate x profit
At a glance
| What it does | Self-employment tax owed on side income. |
|---|---|
| Category | Finance |
| Inputs needed | Side hustle income, Business expenses, Marginal income tax rate |
| Main output | Estimated total tax owed |
| Formula | SE tax = profit x 0.9235 x 15.3%; total = SE tax + income tax rate x profit |
| Cost | Free — no sign-up, no download |
How to use the Side Hustle Tax Calculator
- 1Enter your total side hustle income and deductible business expenses.
- 2Enter your marginal federal income tax bracket.
- 3Set aside the estimated total tax in a separate savings account for quarterly payments.
Inputs explained
- Side hustle income
- Enter the side hustle income you are working with.
- Business expenses
- Enter the business expenses you are working with.
- Marginal income tax rate(%)
- Enter the marginal income tax rate in %.
Worked example
Using the values the calculator loads with:
Inputs
- Side hustle income12000
- Business expenses2000
- Marginal income tax rate22 %
Results
- Estimated total tax owed$3,612.96
- Net profit$10,000.00
- Self-employment tax$1,412.96
- Income tax (est.)$2,200.00
- Suggested quarterly set-aside$903.24
Frequently asked questions
Do I need to pay quarterly?
If you expect to owe $1,000+ in tax, the IRS generally requires quarterly estimated payments.
What counts as a business expense?
Ordinary and necessary costs like supplies, mileage, software and a portion of home office costs.
What do I need to enter into the Side Hustle Tax Calculator?
Just 3 values: side hustle income, business expenses, marginal income tax rate. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Side Hustle Tax Calculator work out the answer?
Self-employment tax is 15.3% of net earnings (92.35% of profit), plus your marginal income tax rate. It applies the formula SE tax = profit x 0.9235 x 15.3%; total = SE tax + income tax rate x profit and shows the working so you can check each step by hand.
Is the Side Hustle Tax Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.