Your Estimated Quarterly Payment
$4,230
Based on total annual tax of $16,920
| Component | Amount |
|---|
| Self-Employment Tax | $10,595 |
| Federal Income Tax | $6,325 |
| Total Tax | $16,920 |
| Suggested Quarterly Payment | $4,230 |
Safe Harbor Alternative: To avoid underpayment penalties, you can pay 100% of your 2025 total tax (110% if your 2025 AGI exceeded $150,000) divided by four. Compare that amount with the estimate above and pay the smaller one — you'll still be penalty-free.
How is this calculated?
We first calculate self-employment tax (15.3% of 92.35% of net income, then deductible half). Then we compute adjusted gross income, subtract the standard deduction, and apply 2026 federal income tax brackets. The total is divided by four for quarterly payments.
How to use this estimate
The quarterly amount shown is a suggested payment to avoid underpayment penalties. You may also use the IRS safe harbor rule: pay 100% (110% if AGI > $150k) of last year's tax in equal installments. If your income is irregular, consider the annualized method (IRS Schedule AI).
Next Steps
Mark your calendar with the quarterly deadlines: April 15, June 15, September 15, and January 15. Use Form 1040-ES to make payments online or by mail. Adjust your estimate if your income changes significantly during the year.
2026 Quarterly Estimated Tax Guide for Self-Employed Individuals
If you earn income as a freelancer, independent contractor, or small business owner, the IRS generally requires you to pay taxes as you go — through quarterly estimated tax payments. Unlike traditional employees, who have taxes withheld from every paycheck, self-employed individuals are responsible for calculating and remitting both income tax and self-employment tax four times a year.
This calculator helps you estimate your quarterly payment based on your projected annual net income, filing status, and other income. We use the latest 2026 tax brackets and standard deduction amounts (projected from IRS inflation adjustments) to give you a reliable figure. The 2026 Social Security wage base is $184,500.
How Self-Employment Tax Works
The self-employment (SE) tax is the equivalent of the Social Security and Medicare taxes paid by W-2 workers. The rate is 15.3%, consisting of 12.4% for Social Security and 2.9% for Medicare. However, you only pay SE tax on 92.35% of your net earnings. The Social Security portion applies only up to the annual wage base ($184,500 for 2026). An additional 0.9% Medicare surtax may apply on income above certain thresholds ($200,000 for single filers, $250,000 for joint).
One advantage: you can deduct half of your SE tax when calculating your adjusted gross income, which reduces your income tax.
Federal Income Tax Brackets (2026 Projected)
The calculator uses 2026 projected tax brackets based on inflation adjustments. For a single filer, the rates are: 10% on income up to $12,200; 12% on $12,200–$49,400; 22% on $49,400–$105,200; 24% on $105,200–$200,700; 32% on $200,700–$255,300; 35% on $255,300–$639,500; and 37% on income over $639,500. Married filing jointly and head of household have wider brackets.
The standard deduction for 2026 is estimated at $15,600 (single), $31,200 (married filing jointly), and $23,400 (head of household).
Quarterly Payment Deadlines
- Q1: April 15, 2026
- Q2: June 15, 2026
- Q3: September 15, 2026
- Q4: January 15, 2027
If the 15th falls on a weekend or holiday, the deadline moves to the next business day. Payments can be made electronically through IRS Direct Pay, EFTPS, or by mailing Form 1040-ES with a check.
Quarterly Estimated Tax FAQ
Who needs to pay quarterly estimated taxes?Any self-employed individual, freelancer, or independent contractor who expects to owe $1,000 or more in tax after subtracting withholding and credits should pay quarterly. This also applies to people with significant dividend, interest, or rental income.
What is the current self-employment tax rate?The SE tax rate is 15.3% (12.4% for Social Security + 2.9% for Medicare). The Social Security wage base for 2026 is $184,500. An additional 0.9% Medicare surtax may apply on high earnings.
How can I avoid underpayment penalties?Pay at least 90% of the current year's tax, or 100% of the prior year's tax (110% if your AGI exceeds $150,000) in four equal installments. This calculator estimates your current year liability for the 90% test.
Does this calculator include state taxes?No, this version focuses on federal taxes. Most states also require estimated tax payments; check your state's tax agency website.
What if my income changes during the year?Re-calculate your estimate using this tool and adjust your remaining payments accordingly. You can also annualize your income using IRS Schedule AI (Form 2210).
How do I pay federal estimated taxes?You can pay online via IRS Direct Pay or EFTPS, or by mailing Form 1040-ES. Record your payments to claim credit when you file your annual return.