Home › Finance › Tax & Income › Side Hustle Tax

Side Hustle Tax Calculator

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

Tax Year 2026

Your Income & Expenses

Enter your W-2 and side hustle income details

Employment Income
$
Side Hustle Income
$
$
Software, supplies, advertising, etc.
Deductions
2026 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%

Income Breakdown

Chart: tax breakdown chart.
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 Use This Calculator

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.

Formulas & Methods

V

inp.value.replace(/[^\d.]/g, '')

Chunk

Math.min(taxableIncome - prev, b.max - prev)

Mileage Deduction

state.milesDriven * MILEAGE_RATE

Key Terms

Filing StatusAn input parameter used in side hustle tax calculations. Adjust this value to see how it affects your results.
W-2 Income (Annual)An input parameter used in side hustle tax calculations. Adjust this value to see how it affects your results.
Side Hustle Gross IncomeAn input parameter used in side hustle tax calculations. Adjust this value to see how it affects your results.
Business ExpensesAn input parameter used in side hustle tax calculations. Adjust this value to see how it affects your results.
Business Miles DrivenAn input parameter used in side hustle tax calculations. Adjust this value to see how it affects your results.
Home Office DeductionAn input parameter used in side hustle tax calculations. Adjust this value to see how it affects your results.

Real-World Examples

SA

Sarah

32-year-old marketing manager saving for her first home

Filing Status
12
W-2 Income (Annual)
$60,000
Side Hustle Gross Income
$8,500
Business Expenses
$12,000
Estimated rate
12.4%

Try entering Sarah's values above to see the detailed breakdown.

Understanding Side Hustle Tax

What Is Side Hustle Tax?

Side Hustle Tax is a fundamental concept that this calculator helps you understand and apply. Whether you're a beginner or experienced professional, having precise calculations at your fingertips saves time and reduces errors.

Why It Matters

Understanding side hustle tax helps you make informed decisions backed by data rather than guesswork. Small miscalculations can compound into significant errors, making accurate tools essential for planning and analysis.

How It Works

The Side Hustle Tax Calculator applies established formulas and methodologies to your specific inputs. Results update in real-time, letting you experiment with different scenarios to find the optimal approach for your situation.

Tips & Best Practices

  • Start with realistic values — use actual data when available rather than rough estimates for more meaningful results.
  • Compare scenarios — try different input combinations to understand how each variable affects the outcome.
  • Save your work — use the Share button to bookmark specific calculations for future reference.
  • Consult professionals — for critical decisions, use calculator results as a starting point and verify with a qualified expert.
❓

Frequently Asked Questions

Advanced 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.
Basics 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.
Basics 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.
Basics 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.
Basics 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.