Tax Deadlines 2026: Every Date You Need to Know

When Are 2025 Federal Taxes Due?

The deadline to file your 2025 federal income tax return is April 15, 2026. This is the standard filing deadline for individual taxpayers on a calendar year, and it applies to Form 1040 and all its variants. If you cannot file by April 15, you can request an automatic six-month extension using Form 4868, which pushes your filing deadline to October 15, 2026.

An extension to file is not an extension to pay. If you owe federal income tax, your payment is still due on April 15, 2026, even if you extend. Any balance unpaid after April 15 accrues interest and may be subject to the failure-to-pay penalty of 0.5% per month. To avoid penalties, estimate your tax liability and pay at least 90% of what you owe by the filing deadline, even if your return is not complete.

In 2026, April 15 falls on a Wednesday, so there is no weekend or holiday extension. Taxpayers in Maine and Massachusetts should note that Patriots' Day (April 20, 2026) and Emancipation Day (April 16) can occasionally push their deadlines by a day or two, but for 2026 the standard April 15 date applies nationwide. You can use our Federal Income Tax Calculator to estimate what you owe before the deadline.

Quarterly Estimated Tax Due Dates for 2026

If you are self-employed, a freelancer, a 1099 contractor, or you have significant income that is not subject to withholding (such as investment income or rental income), you are generally required to make quarterly estimated tax payments. The IRS expects you to pay taxes as you earn income throughout the year, not just in a lump sum at filing time.

Notice that the quarterly periods are not evenly split. Q2 covers only two months (April and May), while Q3 covers three months (June through August) and Q4 covers four months (September through December). This uneven schedule catches many first-time estimated taxpayers off guard — the Q2 payment comes just two months after Q1. Use our Quarterly Tax Calculator to determine how much to pay each quarter.

You can make estimated payments through IRS Direct Pay, the Electronic Federal Tax Payment System (EFTPS), or by mailing a check with Form 1040-ES. To avoid underpayment penalties, you generally need to pay at least 90% of your current year's tax liability or 100% of your prior year's tax liability (110% if your prior-year AGI exceeded $150,000) through a combination of withholding and estimated payments.

Business Tax Deadlines for 2026

Business entities have different filing deadlines depending on their structure. Pass-through entities — S-corporations (Form 1120-S) and partnerships (Form 1065) — file earlier than individual returns because their income flows through to the owners' personal returns. For calendar-year businesses, these returns are due March 17, 2026 (March 15 falls on a Sunday, pushing the deadline to Monday the 17th).

C-corporations filing Form 1120 have the same deadline as individual returns: April 15, 2026 for calendar-year filers. Tax-exempt organizations filing Form 990 have until May 15, 2026. All of these entities can request automatic extensions — six months for partnerships and S-corps (to September 15), six months for C-corps (to October 15), and six months for nonprofits (to November 15).

Employers who withhold payroll taxes must file Form 941 (Employer's Quarterly Federal Tax Return) four times per year. The 2026 Form 941 deadlines are April 30 (Q1), July 31 (Q2), October 31 (Q3), and January 31, 2027 (Q4). These forms report wages paid, tips reported, federal income tax withheld, and both the employer and employee shares of Social Security and Medicare taxes. Late filing of Form 941 results in penalties of 5% of the unpaid tax per month, up to 25%.

State Tax Deadlines: Do They Match Federal?

Most states with an income tax match the federal April 15 filing deadline. However, there are notable exceptions. Virginia has a statutory filing deadline of May 1 (extended to May 4 in some years when May 1 falls on a weekend). Iowa, Louisiana, and a few other states have occasionally set different deadlines. For the 2025 tax year filed in 2026, the vast majority of states use April 15 as their due date.

State extension policies vary as well. Some states automatically grant an extension if you file a federal extension (Form 4868), while others require you to file a separate state extension form. States like California and New York automatically extend the filing deadline if you have a valid federal extension, but they still require payment by the original due date. Always check your state's department of revenue website for specific rules.

If you live in one state and work in another, you may have filing obligations in both states. Multi-state filers should note that each state's deadline applies independently. Being on time in one state does not protect you from penalties in another. States without income tax — Alaska, Florida, Nevada, New Hampshire (no wage income tax), South Dakota, Tennessee, Texas, Washington, and Wyoming — have no individual income tax filing deadline.

What Happens If You Miss a Tax Deadline?

Missing a tax deadline triggers two separate penalties, and both can apply simultaneously. The failure-to-file penalty is 5% of your unpaid tax for each month or partial month that your return is late, up to a maximum of 25%. The failure-to-pay penalty is 0.5% of your unpaid tax per month, also capped at 25%. If both penalties apply in the same month, the failure-to-file penalty is reduced by the failure-to-pay amount, so the combined maximum is 5% per month (not 5.5%).

If your return is more than 60 days late, the minimum failure-to-file penalty is $510 or 100% of the unpaid tax, whichever is less. This minimum penalty means that even small balances can result in significant penalties if you file very late. In addition to penalties, unpaid taxes accrue interest from the original due date at a rate set quarterly by the IRS (currently around 7% annually).

For estimated tax payments, missing a quarterly deadline results in an underpayment penalty calculated as interest on the shortfall for the period it was underpaid. The penalty is calculated separately for each quarter, so missing Q1 results in a larger penalty than missing Q4 because the underpayment accrues for more months. The best way to avoid underpayment penalties is to use the safe harbor: pay at least 100% of your prior year's total tax (110% if your AGI exceeded $150,000) through withholding and estimated payments.

Key IRS Dates Beyond April 15

October 15, 2026 is the deadline for taxpayers who filed a six-month extension. If you requested an extension by April 15, your completed return must be filed by this date. There is no additional extension beyond October 15 for individual returns (with rare exceptions for taxpayers in disaster areas or combat zones).

You can file an amended return (Form 1040-X) at any time within three years from the date you filed the original return, or within two years from the date you paid the tax, whichever is later. For the 2025 tax year, this generally means you have until April 15, 2029 to amend your return. If you discover an error or learn about a deduction you missed, filing an amended return is the way to claim a refund.

IRA and HSA contribution deadlines align with the tax filing deadline. For the 2025 tax year, you have until April 15, 2026 to make Traditional IRA, Roth IRA, and HSA contributions. The 2025 IRA contribution limit is $7,000 ($8,000 if you are 50 or older), and the HSA limit is $4,300 for self-only coverage ($8,550 for family coverage). Filing an extension does not extend these contribution deadlines — April 15 is a hard cutoff for retirement and HSA contributions.

Estimated tax payments can be adjusted at any time during the year. If your income increases or decreases significantly, you can recalculate your quarterly payments going forward. Payments are made through IRS Direct Pay, EFTPS, or by mail with Form 1040-ES vouchers. There is no penalty for overpaying — excess estimated payments are applied to your return as a credit or refunded when you file.

Frequently Asked Questions