Quarterly Tax Deadlines for 2026: Complete Guide
The four quarterly estimated tax deadlines for 2026 are 2026-04-15 (Q1), 2026-06-15 (Q2), 2026-09-15 (Q3), and 2027-01-15 (Q4). You must make estimated payments if you expect to owe $1,000 or more in federal tax after subtracting withholding and credits. Self-employed individuals, freelancers, and anyone with significant income not subject to withholding should pay quarterly to avoid underpayment penalties.
2026 quarterly deadlines
Estimated tax payments follow a schedule that does not divide the year into equal quarters:
| Quarter | Income Period | Payment Due Date |
|---|---|---|
| Q1 | January 1 - March 31 | 2026-04-15 |
| Q2 | April 1 - May 31 | 2026-06-15 |
| Q3 | June 1 - August 31 | 2026-09-15 |
| Q4 | September 1 - December 31 | 2027-01-15 |
Q2 covers only two months (April through May), while Q3 covers three months (June through August) and Q4 covers four months (September through December). If a due date falls on a weekend or federal holiday, the deadline moves to the next business day.
Who must pay estimated taxes
The IRS generally requires estimated tax payments from individuals who expect to owe $1,000 or more when they file their return. Common situations include:
- Self-employed workers: Freelancers, sole proprietors, and independent contractors have no employer withholding. In addition to income tax, they owe self-employment tax at 15.3%.
- Business owners: Partners, LLC members, and S-Corp shareholders who receive distributions rather than W-2 wages.
- Investors: Individuals with significant capital gains, dividends, or rental income.
- Retirees: Those receiving pension or IRA distributions without sufficient voluntary withholding.
- Gig workers: Rideshare drivers, freelance writers, consultants, and others receiving 1099 income.
You are generally exempt from the estimated payment requirement if your prior-year tax liability was zero (you had no tax obligation for the full 12-month prior year and you were a U.S. citizen or resident).
How to calculate each payment
There are two common approaches to calculating quarterly payments:
Equal installments method
Estimate your total 2026 tax liability (income tax plus SE tax, minus credits), then divide by four. Pay one-fourth each quarter. This is the simplest approach and works well when your income is relatively steady throughout the year.
Example: Equal installments
A freelancer estimates $60,000 of net SE income for 2026.
Estimated SE tax: approximately $8,478
Estimated income tax: varies by filing status and deductions
Estimated total tax: suppose $16,000
Quarterly payment: $16,000 ÷ 4 = $4,000 per quarter
Annualized income installment method
If your income is uneven throughout the year (common for seasonal businesses or freelancers), you can use the annualized income installment method (Form 2210, Schedule AI). This calculates the required payment for each quarter based on income actually received during that period, potentially reducing earlier payments when income is back-loaded.
Safe harbor thresholds
You avoid the underpayment penalty entirely if your total prepayments (withholding plus estimated payments) meet either safe harbor test:
- Current-year test: Pay at least 90% of your2026 tax liability
- Prior-year test: Pay at least 100% of your prior-year tax liability (110% if your prior-year AGI exceeded $150,000)
The prior-year test is particularly useful for self-employed workers with variable income, since last year's tax is a known number. If your income is growing, paying100% of last year's tax is often the lower bar.
For detailed safe harbor calculations, see our safe harbor guide.
How to pay: Form 1040-ES
You have several options for making estimated tax payments:
- IRS Direct Pay: Free online payment directly from your bank account at directpay.irs.gov
- EFTPS: The Electronic Federal Tax Payment System allows scheduled payments in advance
- Credit or debit card: Through IRS-approved payment processors (fees apply)
- Mail: Send a check with a Form 1040-ES payment voucher to the IRS address for your state
When paying online, select "Estimated Tax" as the payment type and the correct tax year. Keep confirmation numbers for your records.
What happens if you miss a deadline
Missing an estimated tax payment or paying less than the required amount triggers the underpayment penalty under IRC Section 6654. The penalty is calculated as interest on the shortfall for each quarter, running from the due date until the payment is made or the filing deadline arrives.
The penalty applies per quarter. Missing Q1 does not mean Q2's payment can make up for it without penalty. Each quarter is assessed independently.
Use the quarterly estimated tax calculator to determine your payment amounts, or the estimated tax penalty calculator to see whether you face a penalty for missed or late payments.