How Do Quarterly Estimated Taxes Work for Freelancers and Gig Workers?
Published October 29, 2026
Estimated tax is the way people with no paycheck withholding pay the IRS as they earn. If you expect to owe $1,000 or more after subtracting withholding and credits, Publication 505 says you generally must pay during the year. The payments go out four times a year, and each one has a due date. Paying the full amount in April is not the same thing.
When are the 2026 payments due?
Publication 505, Tax Withholding and Estimated Tax (2026 edition), lists these due dates for tax year 2026: April 15, 2026, for income earned January 1 through March 31; June 15, 2026, for income earned April 1 through May 31; September 15, 2026, for income earned June 1 through August 31; and January 15, 2027, for income earned September 1 through December 31.
How much do I have to pay?
Publication 505 describes two safe-harbor routes. You avoid an underpayment penalty if your payments total at least 90% of your 2026 tax, or 100% of the tax shown on your 2025 return. If your 2025 adjusted gross income was more than $150,000 ($75,000 if married filing separately), the prior-year figure rises to 110%. Pick whichever route is easier to meet. Publication 505 says the balance is usually paid in four equal installments.
What does a worked example look like?
Illustration only, with made-up round numbers: Jordan is a self-employed photographer. Jordan's total tax on the 2025 return was $6,000, and Jordan's 2025 adjusted gross income was $70,000, below the $150,000 line. Jordan expects 2026 tax of $9,000 and has no withholding from a job.
Step 1: Figure 90% of expected 2026 tax: 90% of $9,000 is $8,100.
Step 2: Figure 100% of 2025 tax: $6,000.
Step 3: Use the smaller number, $6,000, as the target. Four equal payments make $1,500 each.
Step 4: Schedule the payments for April 15, June 15, and September 15, 2026, and January 15, 2027, at $1,500 each.
If Jordan's 2026 income grows late in the year, the later payments can be recalculated using the Form 1040-ES worksheet rather than paid all at once.
What is the most common mistake?
Waiting until the filing deadline to pay anything. Publication 505 notes that you may owe a penalty for underpaying in a given period, even if you pay the rest of the tax with your return. Missing early payments can create that penalty, even when the total tax is paid in full. The second common mistake is using only last year's number, when a big income jump in 2026 could push the required amount higher.
Two rules keep the math honest. First, the 2025 safe-harbor figure only works if your 2025 return covered all 12 months, as Publication 505 spells out. Second, the schedule can change. Publication 505 explains that if your income, deductions, or credits change after you make a payment, you may need to refigure your estimated tax. You then pay the unpaid balance by the next due date or spread it across the remaining installments. Write down your estimate each quarter so a change doesn't catch you off guard.
Don't wait for a perfect number. If your estimate for the year turns out to be off, you can still adjust the remaining payments. The goal is to have a payment made on each due date, sized as well as you can size it with the information you have that quarter. Paying on each due date is far better than waiting for a perfect number, and the safe-harbor rules above set the minimum you need by each date.
What should I do next?
Set up a simple routine:
- Estimate 2026 net profit each quarter, using your bank records and invoices.
- Move a set percentage of each payment you receive into a separate savings account.
- Put the four 2026 due dates on your calendar, and pay through one of the electronic options listed in Publication 334 or Form 1040-ES.
- Keep a record of each payment and its date for your return.
If your income is uneven, a credentialed tax preparer can help you build a payment plan that fits your months, not just the averages.
When you're ready to set up a realistic schedule, see how it works.
Sources: IRS Publication 505 (2026 edition), Estimated Tax and Figuring Each Payment sections and due-date table; IRS Publication 334 (2025 edition), Estimated tax payments; Form 1040-ES. This is general information, not advice about your specific return.
Sources: IRS Publication 505 (2026 edition): due dates for tax year 2026 (April 15, June 15, September 15 2026; January 15 2027), $1,000 threshold, 90% of 2026 tax or 100% of 2025 tax, 110% rule above $150,000 ($75,000 married filing separately), four equal installments, Form 1040-ES worksheet; IRS Publication 334 (2025 edition), estimated tax section; Form 1040-ES. This is general information, not advice about your specific return.
