Last reviewed 2026-09-13 · 8 min read
If you've never paid estimated taxes before, the system can feel like a mystery: there's no employer telling you a number, no automatic withholding, and the IRS expects you to send in payments four times a year based on income you're still earning. This guide breaks down what estimated taxes are, who generally needs to make them, and how the 2026 due dates work.
This is educational information about how the estimated tax system works, not a determination of what you owe — your own liability depends on your full financial picture.
What 'estimated taxes' actually means
The US federal tax system is pay-as-you-go: the IRS expects tax to be paid as income is earned, not in one lump sum the following spring. Employees satisfy this through paycheck withholding. Freelancers, independent contractors, and other self-employed people generally satisfy it by making estimated tax payments directly to the IRS four times a year, covering both income tax and self-employment tax on their net earnings.
These aren't a separate tax — they're prepayments toward the same tax liability you'll reconcile on your annual return (Form 1040, with self-employment tax figured on Schedule SE). Overpay through estimates and you get a refund; underpay significantly and you may owe a balance plus a penalty for underpayment of estimated tax.
Who generally needs to pay them
As a general rule, the IRS says you may need to make estimated payments if you expect to owe at least $1,000 in tax for the year after subtracting withholding and refundable credits. Most full-time freelancers with no other withholding easily cross that threshold.
If you also hold a W-2 job alongside freelance work, you have another option worth knowing about: increasing withholding at your day job (via Form W-4) can sometimes cover your freelance tax liability instead of making separate quarterly payments, since withholding is treated as paid evenly throughout the year regardless of when it's actually withheld.
The 2026 due dates
Estimated payments for the 2026 tax year are generally due on four dates: April 15, 2026; June 15, 2026; September 15, 2026; and January 15, 2027 for the fourth-quarter payment. Despite the name, these periods aren't equal three-month quarters — the second 'quarter' payment, for example, covers only April and May.
If a due date falls on a weekend or legal holiday, the deadline shifts to the next business day; always confirm the current date on IRS.gov before filing, since deadlines are occasionally adjusted.
- Q1 2026: due April 15, 2026
- Q2 2026: due June 15, 2026
- Q3 2026: due September 15, 2026
- Q4 2026: due January 15, 2027
How to estimate each payment
The IRS provides Form 1040-ES with a worksheet for estimating your annual tax liability and dividing it into quarterly payments. In practice, most freelancers either project their full-year net income and divide the estimated annual tax by four, or recalculate each quarter based on actual year-to-date income — the second approach adapts better to inconsistent income.
Worked example: suppose a freelancer projects $60,000 in net self-employment income for 2026 and, after running the numbers, estimates roughly $13,000 in combined self-employment and income tax for the year. Divided evenly, that's about $3,250 per quarterly payment. If a big project arrives in Q3 and full-year net income turns out closer to $80,000, the freelancer would recalculate and increase the Q3 and Q4 payments rather than staying at $3,250 for all four.
How to actually send the payment
The IRS accepts estimated payments electronically through IRS Direct Pay, the Electronic Federal Tax Payment System (EFTPS), or by debit/credit card through an IRS-approved processor, as well as by mail with a Form 1040-ES voucher. Electronic payment gives you an immediate confirmation and record, which is useful if a payment is ever questioned.
Keep confirmation numbers and payment records for each quarter in the same place you keep your other tax documents — you'll need the total amount paid for the year when you file your annual return.
What if your income changes mid-year
It's normal for freelance income to be lumpy. If a quarter is much stronger or weaker than expected, you can adjust the next payment up or down using a fresh projection rather than being locked into your original Form 1040-ES estimate. The goal across the year is to get reasonably close to your actual liability, not to hit each quarter perfectly.
If you consistently underpay early in the year and catch up later, you may still face a penalty for the underpaid quarters — see our guide on what happens if you miss a quarterly payment for how that's calculated and what the safe harbor rule can do to help avoid it.
Common first-timer mistakes
Two mistakes come up often: waiting until the annual filing deadline to pay anything (which can trigger an underpayment penalty even if the full balance is paid by April), and forgetting that a payment is still due even in a quarter with lower income, if your year-to-date tax owed has grown.
A third common mistake is assuming there is nothing to pay because a client didn't provide a 1099 — reporting and payment obligations are based on income earned, not on receiving a particular tax form.
Takeaways
- ·Estimated taxes are prepayments toward the same liability reconciled on your annual return, not a separate tax.
- ·A common rule of thumb is that you may need to pay estimates if you expect to owe at least $1,000 for the year after withholding and credits.
- ·For 2026, the four due dates are April 15, June 15, and September 15, 2026, and January 15, 2027.
- ·Form 1040-ES includes a worksheet for estimating each payment; recalculate when income changes materially.
- ·Payments can be made electronically via IRS Direct Pay or EFTPS, or by mail with a 1040-ES voucher.
Sources and further reading
Federal tax planning information only. TaxStow is not a tax preparer and this is not tax advice. State and local rules are separate, and a qualified professional can account for details this page cannot.