For U.S. federal income taxes for the 2025 tax year (filed in 2026), the main deadline for most individuals is April 15, 2026.

Key dates at a glance

  • Regular filing deadline for individual federal returns (Form 1040): April 15, 2026.
  • Extended deadline (if you request an extension with Form 4868 by April 15): October 15, 2026 for individual and most corporate returns.
  • Quarterly estimated tax payments for many individuals and C corporations (for 2025 income):
    • Q4 2025 payment: January 15, 2026.
* Q1 2026: **April 15, 2026**.

* Q2 2026: **June 15, 2026**.

* Q3 2026: **September 15, 2026**.

Other common U.S. federal deadlines (2026)

These matter if you have a business, trust, or other entity.

  • Partnerships (Form 1065) and S corps (Form 1120‑S): March 16, 2026 ; extended returns due September 15, 2026.
  • C corporations (Form 1120): April 15, 2026 ; extended returns due October 15, 2026.
  • Trusts and estates (Form 1041): April 15, 2026 ; extended returns due September 30, 2026.
  • Nonprofits (Form 990): generally May 15, 2026.

Example : If you are a typical W‑2 employee with no business, you usually just need to file Form 1040 and pay any tax due by April 15, 2026 or file an extension by that date.

What about state or non‑U.S. taxes?

  • U.S. state income tax deadlines often match the federal date (around April 15) but can differ slightly, so you must check your specific state’s revenue department.
  • In Canada, for example, the personal tax filing deadline is usually April 30 for most individuals and June 15 for self‑employed people, although any balance due is usually owed by April 30.

Quick HTML table of major 2026 U.S. dates

html

<table>
  <thead>
    <tr>
      <th>Return / Payment Type</th>
      <th>Tax Year Covered</th>
      <th>Due Date in 2026</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Individual Form 1040 regular filing</td>
      <td>2025</td>
      <td>April 15, 2026</td>
    </tr>
    <tr>
      <td>Individual Form 1040 with extension</td>
      <td>2025</td>
      <td>October 15, 2026</td>
    </tr>
    <tr>
      <td>Partnership Form 1065</td>
      <td>2025</td>
      <td>March 16, 2026</td>
    </tr>
    <tr>
      <td>S corporation Form 1120-S</td>
      <td>2025</td>
      <td>March 16, 2026</td>
    </tr>
    <tr>
      <td>C corporation Form 1120 (calendar year)</td>
      <td>2025</td>
      <td>April 15, 2026</td>
    </tr>
    <tr>
      <td>Q4 2025 estimated tax payment</td>
      <td>Estimated 2025 income</td>
      <td>January 15, 2026</td>
    </tr>
    <tr>
      <td>Q1 2026 estimated tax payment</td>
      <td>Estimated 2026 income</td>
      <td>April 15, 2026</td>
    </tr>
    <tr>
      <td>Q2 2026 estimated tax payment</td>
      <td>Estimated 2026 income</td>
      <td>June 15, 2026</td>
    </tr>
    <tr>
      <td>Q3 2026 estimated tax payment</td>
      <td>Estimated 2026 income</td>
      <td>September 15, 2026</td>
    </tr>
  </tbody>
</table>

Quick forum-style note and TL;DR

On personal finance forums, the most repeated advice is: treat April 15 as the big red circle on your calendar, and if you can’t make it, at least file an extension and pay what you reasonably owe to reduce penalties.

TL;DR: For most U.S. individuals, taxes for the 2025 tax year must be filed (or extended) by April 15, 2026 ; paying late can trigger penalties and interest, so plan ahead.