See the incremental tax impact of your side hustle income before it surprises you at filing time.
Tax Planning
Side hustle tax calculator that shows what you actually keep per dollar.
Enter your W-2 salary, side hustle gross income, and business expenses to calculate self-employment tax, incremental federal income tax, state tax, and quarterly estimated payments.
Direct answerA side hustle tax calculator estimates self-employment tax (15.3% on 92.35% of net profit), incremental federal income tax from bracket stacking, and state tax - then shows quarterly estimated payments and your real take-home per dollar.
W-2 + 1099 combinedSE tax breakdownQuarterly payments
1. Enter your details
CalculatorEnter your side hustle income, business expenses, W-2 salary, and filing status to calculate your total tax burden and quarterly payments.
Enter your side hustle income or load a sample scenario to calculate your tax burden.
Live Tool
Side Hustle Tax Calculator in the browser
Enter your income details to calculate SE tax, income tax, and quarterly payments.
Privacy-first workflow
This page runs in the browser. No financial data is sent to any server.
What this side hustle tax calculator solves
Side hustle income is taxed differently than W-2 wages. This calculator shows you the full picture so you can plan ahead and avoid surprises at filing time.
Get a per-dollar keep rate so you know exactly what percentage of side hustle income to save for taxes.
Get exact quarterly estimated payment amounts with due dates so you stay current with the IRS.
Key signals
SE tax, incremental income tax, state tax, total tax burden, and per-dollar keep rate.
Decision support
Quarterly estimated payments, effective tax rate, and bracket stacking impact.
Detailed breakdown
Step-by-step calculation of SE tax, federal income tax, state tax, and quarterly payments.
Calculates how side hustle income stacks on top of your W-2 salary to determine your true marginal tax rate.
Breaks self-employment tax into Social Security and Medicare components with the 92.35% net earnings factor applied.
Calculates quarterly estimated tax payments so you stay current with the IRS and avoid underpayment penalties.
Shows exactly how much you keep from each dollar of side hustle income after all taxes are accounted for.
Guide Below The Tool
How to estimate your side hustle tax bill
Key concepts, practical steps, and guidance for managing side hustle tax obligations.
A side hustle tax calculator determines the total tax burden on self-employment income when combined with W-2 wages. It calculates self-employment tax (15.3% on 92.35% of net profit), incremental federal income tax from bracket stacking, state income tax, and quarterly estimated payment amounts.
Anyone with both W-2 employment and side income from freelancing, gig work, consulting, or a small business. Also useful for people considering starting a side hustle who want to understand the tax implications before committing.
Your W-2 salary determines your starting tax bracket, and side hustle net profit stacks on top. Self-employment tax at 15.3% is separate from income tax and is the biggest surprise for most side hustlers. Business expenses reduce both SE tax and income tax.
Workflow
Four practical steps
Use this calculator to understand your side hustle tax liability and plan quarterly estimated payments accordingly.
1
Enter side hustle gross income.Start with total gross revenue from all self-employment sources including freelancing, gig work, consulting, and product sales.
2
Subtract business expenses.Enter deductible expenses like home office, mileage, supplies, and software. These reduce both income tax and self-employment tax.
3
Add W-2 income.Your regular salary determines where bracket stacking begins. Side hustle income is taxed at your highest marginal rate and above.
4
Review total tax and quarterly payments.See the complete breakdown of SE tax, income tax, and state tax. Use quarterly payment amounts to stay current with the IRS.
Review Checklist
What to validate first
Key assumptions that affect your side hustle tax calculation.
Make sure you are entering gross side hustle income and listing expenses separately. The calculator subtracts expenses to determine net profit for tax purposes.
Every legitimate deduction reduces your SE tax and income tax. Track home office, mileage, equipment, software, internet, phone, and professional development.
Your W-2 income determines your starting tax bracket. Side hustle income stacks on top, so an incorrect W-2 figure will skew the bracket stacking calculation.
Filing status affects bracket widths and standard deduction amounts. Married filing jointly has wider brackets than single, which changes the incremental tax rate.
State income tax rates vary widely. Some states have no income tax, while others exceed 10%. Use your actual state rate for an accurate total tax estimate.
IRS quarterly due dates are April 15, June 15, September 15, and January 15. Missing these dates triggers underpayment penalties even if you pay in full at filing.
Why This Page Exists
Built to show side hustlers what they actually keep
Side hustle taxes are more complex than W-2 taxes because you pay both halves of FICA and your income stacks into higher brackets. This calculator makes the full picture transparent.
See exactly how much goes to SE tax, federal income tax, and state tax with no black-box calculations.
Know exactly how much to set aside each quarter so you never face an unexpected tax bill at filing time.
Ledger Summit can build client-facing side hustle tax tools for accounting practices. This page delivers value right now.
FAQ
Side hustle tax questions, answered directly
Short answers for searchers and answer engines.
Side hustle income is subject to self-employment tax (15.3% on 92.35% of net profit for Social Security and Medicare) plus federal and state income tax. The income stacks on top of any W-2 salary, so it is taxed at your highest marginal bracket.
Self-employment tax covers both the employer and employee portions of Social Security (12.4%) and Medicare (2.9%), totaling 15.3%. It applies to 92.35% of net self-employment income. You can deduct half of SE tax from your AGI.
If you expect to owe $1,000 or more in taxes at filing, the IRS requires quarterly estimated payments. Due dates are April 15, June 15, September 15, and January 15.
Common deductions include home office, vehicle mileage, supplies, software, internet, phone, professional development, and marketing. Business expenses reduce both income tax and self-employment tax.
No. All calculations run in your browser. No financial data is sent to any server.
Next Step
Need custom self-employment tax tooling?
Use the free calculator for personal side hustle tax planning. If you need client-facing tax tools, Ledger Summit can build the next layer.
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