Freelancer's Guide to Quarterly Estimated Taxes (Form 1040-ES)
7 min read · Updated June 2026
If you're self-employed and expect to owe $1,000+ in taxes for the year, the IRS requires you to pay estimated taxes quarterly. Miss a payment and you'll face penalties — even if you pay the full amount by April 15.
What Are Quarterly Estimated Taxes?
Unlike W-2 employees who have taxes withheld from every paycheck, freelancers and independent contractors must send tax payments to the IRS four times a year. This covers both income tax and self-employment tax (Social Security + Medicare).
2026 Quarterly Tax Due Dates
| Period | Due Date |
|---|---|
| January 1 – March 31 | April 15 |
| April 1 – May 31 | June 15 |
| June 1 – August 31 | September 15 |
| September 1 – December 31 | January 15 (next year) |
If a due date falls on a weekend or holiday, it moves to the next business day.
How to Calculate Your Quarterly Payment
The safest approach is the "safe harbor" rule: pay at least 100% of last year's tax liability (110% if your AGI was over $150,000). Divide that by 4 and send it each quarter.
For a more precise estimate:
- Estimate your annual net income — total freelance revenue minus business expenses
- Calculate self-employment tax — 15.3% on the first $168,600 of net earnings, 2.9% above that
- Estimate income tax — apply the federal brackets to your taxable income (after the ½ SE tax deduction and 20% QBI deduction)
- Add state tax — varies by state (0% in TX/FL/WA to 13.3% in CA)
- Divide by 4 — that's your quarterly payment
Calculate Your Quarterly Payment
Use our Freelancer Tax Calculator to get an instant estimate including quarterly payment amounts and due dates.
How to Pay
- IRS Direct Pay — free, direct from your bank account at irs.gov/payments
- EFTPS — Electronic Federal Tax Payment System (enroll at eftps.gov)
- By mail — Form 1040-ES with a check (allow 2 weeks for delivery)
- Credit/debit card — through approved payment processors (fees apply)
Underpayment Penalties
The penalty is essentially interest on the amount you should have paid each quarter. For 2026, the rate is approximately 8% annually. You can avoid penalties if you:
- Pay at least 100% of last year's tax (110% if AGI > $150K)
- Pay at least 90% of this year's actual tax
- Owe less than $1,000 in tax for the year
Common Mistakes
- Forgetting the June and September payments — they're easy to miss since they're not at quarter-end
- Not accounting for state taxes — many states require separate quarterly payments
- Using last year's income when this year is much higher — you'll owe a big bill in April plus penalties
- Mixing personal and business expenses — makes it impossible to calculate accurate deductions
1099-K Threshold Changed
The 2026 1099-K reporting threshold is $600. If you earn over $600 on any platform (Uber, Etsy, Stripe), you'll receive a 1099-K. Use our 1099-K Tax Estimator to prepare.
The Bottom Line
- Pay quarterly if you expect to owe $1,000+ in taxes for the year
- Due dates: April 15, June 15, September 15, January 15
- Use the safe harbor rule: pay 100% of last year's tax (110% if high income)
- Set aside 25–30% of every payment for taxes
- Pay via IRS Direct Pay — it's free and instant