2026 Tax Deadlines & Due Dates
Every key federal tax due date for the 2026 season — with a live countdown to the next one.
Q4 2025 estimated tax due 1040-ES · self-employed & investors | January 15, 2026 … |
W-2s & 1099-NECs to recipients + filed Employers & payers | January 31, 2026 … |
S-corp (1120-S) & partnership (1065) returns Pass-through entities (Mar 15 falls on a Sunday) | March 16, 2026 … |
Individual (1040) & C-corp (1120) returns · Q1 estimated · IRA/HSA Everyone | April 15, 2026 … |
Q2 2026 estimated tax due 1040-ES · self-employed & investors | June 15, 2026 … |
Q3 estimated · extended 1120-S & 1065 returns Self-employed & pass-through entities | September 15, 2026 … |
Extended individual (1040) & C-corp returns Anyone who filed an extension | October 15, 2026 … |
Q4 2026 estimated tax due 1040-ES · self-employed & investors | January 15, 2027 … |
Key federal dates for the 2026 filing season (tax year 2025). Weekend/holiday shifts applied. State deadlines and specific situations may differ — not tax advice.
Key 2026 federal tax deadlines at a glance
Missing a tax deadline is one of the easiest — and most expensive — mistakes to avoid. This tracker lists every major federal due date for the 2026 filing season (tax year 2025) and counts down the days to the next one, so nothing sneaks up on you. Filter by individuals, self-employed or business to see just the dates that apply to you.
Filing, extension and estimated-tax dates
The headline dates are April 15, 2026 for individuals and C-corps, and March 16, 2026 for S-corps and partnerships. Extensions move personal returns to October 15 and pass-throughs to September 15. Self-employed taxpayers also have four estimated-tax due dates through the year.
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Frequently asked questions
When is Tax Day 2026?
The federal filing deadline for individual (Form 1040) returns and C-corporation (1120) returns for the 2025 tax year is April 15, 2026. It's also the Q1 2026 estimated-tax and IRA/HSA contribution deadline.
When are business tax returns due?
S-corporations (1120-S) and partnerships (1065) are due March 16, 2026 (the 15th is a Sunday). C-corporations (1120) are due April 15, 2026. Extensions push these to September 15 and October 15, 2026 respectively.
When are quarterly estimated taxes due in 2026?
For the 2025 tax year: Q4 2025 on January 15, 2026; then Q1 on April 15, Q2 on June 15 and Q3 on September 15, 2026; and Q4 2026 on January 15, 2027.
What happens if a tax deadline falls on a weekend?
If a due date lands on a weekend or federal holiday, it shifts to the next business day. This tracker already applies those shifts (for example, the March 15 pass-through deadline moves to March 16, 2026).
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