Home › Finance › Tax & Income › Side Hustle Tax

Side Hustle Tax Calculator

Estimate self-employment tax, quarterly payments & deductions for freelance & gig income

Tax Year 2025

Your Income & Expenses

Enter your W-2 and side hustle income details

Employment Income
$
Side Hustle Income
$
$
Software, supplies, advertising, etc.
Deductions
2025 IRS rate: $0.70/mile
$
Simplified: $5/sq ft up to 300 sq ft ($1,500 max)
$
Self-employed health insurance deduction
$
SEP-IRA max: 25% of net SE income; Solo 401k: up to $23,500 employee + 25% employer

Tax Breakdown

Your estimated side hustle tax liability

Estimated Quarterly Payment
$0
Net SE Income
$0
Self-Employment Tax
$0
Additional Income Tax
$0
SE Tax Deduction
$0
Total Annual Tax
$0
Effective Rate (Side Hustle)
0%
Take-Home from Side Hustle
$0
after all taxes

Quarterly Estimated Tax Payments

IRS requires estimated payments if you expect to owe $1,000+ in tax

Quarter Period Due Date Payment Running Total

Important Dates & Notes

  • Q1 (Jan-Mar): Due April 15, 2026
  • Q2 (Apr-May): Due June 15, 2026
  • Q3 (Jun-Aug): Due September 15, 2026
  • Q4 (Sep-Dec): Due January 15, 2027
  • Pay via IRS Direct Pay, EFTPS, or mail Form 1040-ES vouchers
  • You may avoid penalties by paying 100% of prior year tax (110% if AGI > $150k)

Common Side Hustle Deductions

Track which deductions apply to your business

🚗 Vehicle & Transportation

🏠 Home Office

💻 Equipment & Supplies

💼 Professional Services

📣 Marketing & Advertising

🛡 Insurance

🎓 Education & Training

0 deductions selected — Remember to keep receipts and records for all claimed deductions.

How to Calculate Your Side Hustle Taxes

1

Determine Net Self-Employment Income

Subtract all business expenses from your gross side hustle income. This includes mileage, home office costs, supplies, and any other ordinary and necessary business expenses.

2

Calculate Self-Employment Tax

Multiply your net SE income by 92.35%, then apply the 15.3% SE tax rate (12.4% Social Security + 2.9% Medicare). The Social Security portion caps at the wage base limit.

3

Deduct Half of SE Tax

You can deduct 50% of your self-employment tax from your adjusted gross income. This reduces your income tax liability but not the SE tax itself.

4

Calculate Additional Income Tax

Your side hustle income is added on top of your W-2 income. The additional federal income tax depends on your marginal bracket based on combined income.

5

Divide into Quarterly Payments

Split your total estimated tax into four quarterly payments. The IRS requires estimated payments if you expect to owe $1,000 or more. Missing payments may result in penalties.

Frequently Asked Questions

Do I have to pay self-employment tax on my side hustle?

Yes. If your net self-employment income is $400 or more, you must pay self-employment tax (Social Security + Medicare) on that income, even if your total income is low enough that you don't owe income tax.

What is the difference between self-employment tax and income tax?

Self-employment tax covers Social Security (12.4%) and Medicare (2.9%) contributions. As an employee, you split these with your employer, but as a self-employed person, you pay both halves. Income tax is a separate federal tax on your total taxable income based on your tax bracket.

When are quarterly estimated tax payments due?

Quarterly payments are due April 15, June 15, September 15, and January 15 of the following year. If the due date falls on a weekend or holiday, the deadline moves to the next business day.

Can I deduct business expenses from my side hustle income?

Yes. You can deduct ordinary and necessary business expenses on Schedule C, including home office costs, mileage, equipment, software, advertising, and professional services. These reduce both your income tax and self-employment tax.

What happens if I don't make quarterly estimated payments?

The IRS may charge an underpayment penalty if you owe $1,000+ at tax time and didn't pay at least 90% of current-year tax or 100% of prior-year tax (110% if AGI exceeds $150,000) through withholding and estimated payments.

Related Tax Calculators

📊
Self-Employment Tax
Full SE tax with QBI deduction & S-Corp comparison
📅
Quarterly Tax
Detailed quarterly estimated tax payment calculator
💵
Income Tax
Federal & state income tax estimator
💰
Take-Home Pay
Calculate your net pay after all deductions