Precision Utility
Self-Employed Tax
Calculator
Tax Year
2025
SE Rate
15.3%
Calculate your 2025 self-employment tax and federal income tax as a freelancer, independent contractor, or sole proprietor. Enter your net income and business expenses to see your SE tax, federal tax, QBI deduction, effective rate, and quarterly estimated payments.
Self-Employment Details
Total Tax Owed
$0
SE Tax
$0
Federal Tax
$0
QBI Deduction
$0
Effective Rate
0.0%
Quarterly Estimated Payment
$0
How the self-employed tax calculator works
Enter your net self-employment income (total revenue before this calculator's expense deduction), filing status, and business expenses. The calculator first subtracts your business expenses to determine your net earnings from self-employment.
Self-employment tax is calculated at 15.3% on 92.35% of your net earnings. This includes 12.4% for Social Security (capped at $176,100 in 2025) and 2.9% for Medicare (no cap). If your income exceeds $200,000 (single) or $250,000 (married filing jointly), an additional 0.9% Medicare surtax applies.
Half of your SE tax is deducted from your adjusted gross income. The calculator then applies the Qualified Business Income (QBI) deduction of 20% and computes federal income tax using the 2025 brackets. Your quarterly estimated payment is the total tax divided by four.
Understanding self-employment tax
When you work for an employer, Social Security and Medicare taxes (FICA) are split 50/50 between you and your employer. As a self-employed individual, you pay both halves, totaling 15.3%.
The IRS only taxes 92.35% of your net earnings (100% minus the 7.65% employer-equivalent portion) to account for the fact that employers don't pay FICA on the employer share. You can also deduct half of your SE tax when calculating your adjusted gross income, which reduces your income tax.
The Social Security portion (12.4%) applies to income up to the annual wage base of $176,100 in 2025. The Medicare portion (2.9%) applies to all net earnings with no cap. High earners pay an additional 0.9% Medicare surtax on earnings above $200,000 (single) or $250,000 (married filing jointly).
Qualified Business Income (QBI) deduction
The Section 199A QBI deduction allows eligible self-employed taxpayers to deduct up to 20% of their qualified business income from their taxable income. This is an income tax deduction only; it does not reduce self-employment tax.
This calculator applies a simplified QBI deduction of 20% on qualified income. In practice, the deduction has phase-outs for specified service trades or businesses (SSTBs) when taxable income exceeds $191,950 (single) or $383,900 (married filing jointly) in 2025. Consult a tax professional for complex situations.
Quarterly estimated tax payments
Self-employed individuals generally must make quarterly estimated tax payments to the IRS using Form 1040-ES. Payments are due on the following dates:
- Q1: April 15, 2025
- Q2: June 16, 2025
- Q3: September 15, 2025
- Q4: January 15, 2026
If you expect to owe at least $1,000 in tax after credits and withholding, you are required to make estimated payments. Underpayment may result in a penalty. This calculator divides your total tax by four to give you an approximate quarterly payment amount.
Frequently asked questions
What is self-employment tax?
Self-employment tax covers Social Security (12.4%) and Medicare (2.9%) for people who work for themselves. It is calculated on 92.35% of your net self-employment earnings. Unlike W-2 employees who split FICA with their employer, self-employed individuals pay the full 15.3%.
How do quarterly estimated tax payments work?
Since no employer withholds taxes for you, you must send estimated payments to the IRS four times a year: April 15, June 15, September 15, and January 15. Divide your expected annual tax by four. Missing payments can trigger an underpayment penalty.
What business expenses can I deduct?
You can deduct ordinary and necessary business expenses such as office supplies, software, advertising, professional services, business travel, vehicle expenses (mileage or actual costs), phone and internet (business portion), insurance premiums, and continuing education.
How does the home office deduction work?
You can deduct expenses for a dedicated home office space used exclusively for business. The simplified method allows $5 per square foot up to 300 sq ft ($1,500 max). The regular method calculates the actual percentage of home expenses (rent, utilities, insurance) attributed to your office space.
What is the QBI deduction?
The Qualified Business Income deduction (Section 199A) lets eligible self-employed individuals deduct up to 20% of qualified business income from taxable income. It reduces your income tax but not your self-employment tax. Phase-outs apply for certain service businesses above specific income thresholds.
Can forming an LLC or S-Corp reduce my self-employment tax?
An LLC by itself doesn't change your taxes. However, electing S-Corp treatment lets you pay yourself a reasonable salary (subject to payroll tax) and take remaining profits as distributions (not subject to SE tax). This strategy typically saves money when net profit exceeds $50,000 to $60,000, though you'll have added payroll and accounting costs.