When to pay, how much to pay, and how to avoid underpayment penalties. The complete freelancer's guide to estimated taxes.
The U.S. tax system operates on a pay-as-you-go basis. W-2 employees have taxes withheld from every paycheck, but freelancers and self-employed individuals receive income without any tax withheld. The IRS requires you to make estimated tax payments throughout the year if you expect to owe $1,000 or more in taxes when you file your return.
Failing to pay quarterly estimates triggers underpayment penalties, which are essentially interest charges on the taxes you should have paid throughout the year. The penalty rate is based on the federal short-term interest rate plus 3 percentage points, which has been running at approximately 8% in recent years. Even if you file on time and pay everything you owe in April, you can still face penalties for not paying throughout the year.
Estimated tax payments are due four times per year. Note that the periods are not evenly spaced:
| Period | Income Earned | Payment Due |
|---|---|---|
| Q1 | January 1 – March 31 | April 15, 2026 |
| Q2 | April 1 – May 31 | June 15, 2026 |
| Q3 | June 1 – August 31 | September 15, 2026 |
| Q4 | September 1 – December 31 | January 15, 2027 |
If a due date falls on a weekend or holiday, the deadline shifts to the next business day. Note that Q2 covers only two months while Q3 covers three months, which catches many freelancers off guard.
There are two safe harbor methods to avoid underpayment penalties:
Pay at least 100% of last year's total tax liability, divided into four equal payments. This is the simplest method because you know the exact number from your prior year return (line 24 of Form 1040). If your AGI exceeded $150,000 last year, you need to pay 110% of prior year tax instead of 100%.
Estimate your current year income and pay at least 90% of the expected tax. This method is better if your income is significantly lower this year than last year. However, it requires ongoing estimation and carries risk if your income picks up later in the year.
For most freelancers, a reasonable estimate is 25% to 30% of net self-employment income set aside for taxes (covering income tax + self-employment tax). The exact percentage depends on your tax bracket and state. Use our state calculators to find your specific effective rate, then apply that percentage to each quarter's net income.
In addition to income tax, freelancers owe self-employment (SE) tax of 15.3% on net earnings. This covers both the employee and employer portions of Social Security (12.4%) and Medicare (2.9%). The SE tax applies to the first $168,600 of net self-employment income for the Social Security portion; the Medicare portion has no cap.
You can deduct 50% of the SE tax as an above-the-line adjustment, which reduces your adjusted gross income. This deduction is taken on Schedule 1 of Form 1040 and does not require itemizing. It effectively reduces your income tax, partially offsetting the SE tax burden.
The IRS offers several payment methods:
Do not forget state estimated taxes. Most states with income tax also require quarterly estimated payments using a similar schedule. Check your state's revenue department website for state-specific vouchers and payment portals.
Managing quarterly taxes does not have to be painful. See our Best Tax Tools for Freelancers for platforms that automate expense tracking, calculate quarterly estimates, and file your return. QuickBooks Self-Employed and Keeper both provide real-time quarterly estimate calculations based on your actual income and expenses throughout the year.