A side hustle income calculator helps you estimate how much you actually keep from freelance, gig, or 1099 side income after self-employment tax, federal income tax, and state income tax. Unlike W-2 wages where your employer withholds taxes, side hustle earnings require you to calculate and set aside money for taxes yourself — including quarterly estimated payments to avoid IRS penalties.
Enter Your Side Hustle Details
Total 1099 / gig / freelance earnings before expenses
Home office, mileage, equipment, software, internet, etc.
Used to determine your marginal federal tax bracket
Where Your Side Hustle Money Goes
Tax Breakdown
Quarterly Estimated Tax Payments
Take-Home Income from Side Hustle
Deduction Reminders
These common side hustle deductions can lower your taxable income. Track expenses throughout the year to maximize savings:
Estimate only. This calculator uses 2025 federal tax brackets and approximate state rates. It does not account for self-employed health insurance deductions, retirement contributions, tax credits, local taxes, or other situation-specific factors. Consult a tax professional for personalized advice.
How to Use This Side Hustle Income Calculator
Whether you drive for a rideshare app, sell on Etsy, freelance on weekends, or run any other side hustle, the IRS considers that income self-employment income. That means you owe self-employment tax on top of regular federal and state income taxes — and the total can surprise you if you have not planned for it. This calculator shows you exactly how much of your side gig earnings you actually get to keep.
Step 1: Enter Your Gross Side Hustle Income
Start with your total annual side hustle earnings before any deductions. This is the gross amount reported on your 1099 forms — or the total revenue from your gig work, freelance contracts, or online sales. If you earn from multiple side gigs, combine them into one total.
Step 2: Add Your Business Expenses
Enter any deductible business expenses related to your side hustle. Common deductions include home office costs, vehicle mileage at 70 cents per mile for 2025, equipment purchases, software subscriptions, and internet costs for business use. These expenses reduce your net self-employment income, which lowers both your SE tax and your income tax.
Step 3: Select Filing Status and Enter W-2 Income
Choose your filing status (Single, Married Filing Jointly, or Head of Household) to determine your standard deduction and tax brackets. If you have a day job, enter your W-2 income — this is crucial because your side hustle income stacks on top of your W-2 wages. The marginal tax rate on your side hustle depends on where your total income falls in the federal brackets.
Step 4: Choose Your State
Select your state to include an estimate of state income tax. States like Texas, Florida, and Nevada have no state income tax, which means more take-home pay. States like California and New York can add over 10% in state taxes. The calculator uses simplified marginal rates for the most common income ranges.
Understanding the Results
The calculator breaks down your taxes into three components: self-employment tax (Social Security and Medicare at 15.3% on 92.35% of net income), federal income tax at your marginal rate, and state income tax. It automatically applies the 50% SE tax deduction that reduces your federal taxable income. The visual bar chart shows you at a glance how your side hustle income splits between take-home pay and each type of tax. The quarterly payment section divides your total estimated tax by four, giving you the amount to send the IRS each quarter to avoid underpayment penalties.
Frequently Asked Questions
Is this side hustle tax calculator free?
Yes, this side hustle income calculator is completely free to use with no signup, account, or email required. Use it as many times as you need to plan your side gig finances.
Is my income data private?
Absolutely. All calculations run entirely in your browser using JavaScript. No income figures, tax data, or personal information are ever sent to any server or stored anywhere. Your financial details stay completely private on your device.
Do I have to pay self-employment tax on side hustle income?
Yes, if your net self-employment income is $400 or more per year, you must pay self-employment tax (15.3%) covering Social Security and Medicare. This is in addition to regular federal and state income taxes. The SE tax applies even if you also have a W-2 job.
How does my W-2 income affect side hustle taxes?
Your W-2 income determines which federal tax bracket your side hustle income falls into. Since tax brackets are progressive, your side hustle income stacks on top of your W-2 wages and is taxed at your marginal rate. Your W-2 wages also reduce the Social Security wage base available for SE tax.
What is the 50% SE tax deduction?
The IRS allows you to deduct half of your self-employment tax from your adjusted gross income. This mirrors the employer-side deduction that W-2 employees receive. It reduces your taxable income for federal income tax purposes, lowering your overall tax bill. This calculator applies the deduction automatically.
Do I need to make quarterly estimated tax payments?
If you expect to owe $1,000 or more in total tax for the year, the IRS requires quarterly estimated payments due April 15, June 15, September 15, and January 15. Failing to pay on time results in underpayment penalties. This calculator shows your estimated quarterly payment amount.
What side hustle expenses can I deduct?
Common deductible side hustle expenses include home office costs, vehicle mileage for business use, equipment and supplies, software subscriptions, internet and phone (business portion), professional development, marketing costs, and business insurance. These deductions reduce both your SE tax and income tax.
Does this calculator include state income tax?
Yes, this calculator includes estimated state income tax for all 50 states. Select your state from the dropdown to see the impact. States like Texas, Florida, and Nevada have no state income tax, while others like California and New York have rates above 10%.