A complete 2026 guide for freelancers, self-employed workers, and small business owners -- due dates, safe harbor rules, and how to make payments.
Last updated: April 2026 · Data: IRS, BLS, state sources
If you expect to owe at least $1,000 in federal income tax after withholding and credits, the IRS generally requires quarterly estimated payments. This applies to freelancers, contractors, sole proprietors, LLC members, and anyone with significant non-wage income including investment dividends and rental income.
Employees who receive W-2 wages have taxes withheld automatically. Self-employed individuals have no employer withholding, making quarterly payments the mechanism for staying current with the IRS throughout the year rather than facing one large bill in April.
Most states with income taxes also require quarterly estimated payments when you owe more than a threshold amount (typically $500 to $1,000 depending on the state).
The IRS divides the year into four payment periods. Note that Q2 covers only two months (April and May), not three:
| Period | Income Covered | Federal Due Date |
|---|---|---|
| Q1 2026 | January 1 - March 31 | April 15, 2026 |
| Q2 2026 | April 1 - May 31 | June 16, 2026 |
| Q3 2026 | June 1 - August 31 | September 15, 2026 |
| Q4 2026 | September 1 - December 31 | January 15, 2027 |
If a due date falls on a weekend or federal holiday, the deadline moves to the next business day. Missing a quarterly payment or underpaying triggers the IRS underpayment penalty.
The safest way to avoid the underpayment penalty is to use one of the IRS safe harbor thresholds:
The safe harbor method is the most popular choice because it eliminates penalty risk regardless of how your income fluctuates. Simply divide last year's total tax liability by 4 and pay that amount each quarter.
Example: Your 2025 total tax was $12,000. Your safe harbor quarterly payment for 2026 is $12,000 / 4 = $3,000 per quarter. As long as you make these four $3,000 payments on time, you will not owe an underpayment penalty no matter how much you earn in 2026.
If you prefer to estimate based on current-year income rather than last year's tax:
Our quarterly tax calculator automates this entire process -- enter your estimated income and it returns your per-quarter payment amount.
The easiest methods for paying federal estimated taxes:
For state estimated taxes, most states have an online payment portal. Search your state's department of revenue or taxation website for the payment page.
Enter your estimated self-employment income, filing status, and prior-year tax. Get your quarterly payment amount instantly for all 50 states.
Open Quarterly Tax CalculatorThe IRS charges an underpayment penalty calculated at the federal short-term interest rate plus 3%, applied to the underpaid amount for each day it was due and unpaid. For 2026, this rate is approximately 7-8% annualized. The penalty is calculated on Form 2210 and added to your tax bill when you file.
Most states with income taxes require quarterly estimated payments if you owe more than a threshold (typically $500 to $1,000). Due dates often mirror federal dates but can differ. Check your state's department of revenue for specific rules and payment options.
You can overpay or pay ahead, but each payment applies to a specific quarter. Paying Q1 through Q4 amounts in January does not retroactively cover prior periods. Each quarterly payment must be made by its due date to avoid the underpayment penalty for that period.