For U.S. federal income taxes, the main 2025 deadline most people care about is:

  • April 15, 2025 – Last day to file your 2024 federal income tax return (the “2025 tax season”) or request an extension, and to pay any tax due to avoid late-payment penalties.

If you file an extension, your new filing deadline becomes:

  • October 15, 2025 – Final deadline to file your extended 2024 return (tax year 2024, filed during the 2025 season).

Other key 2025 U.S. dates (quick view)

  • March 15, 2025 – S‑corporation and partnership returns for 2024 (Forms 1120‑S, 1065) due or extension filed.
  • Estimated payments for 2025 income (individuals) :
    • Q1: April 15, 2025
    • Q2: June 16–17, 2025 (sources differ by one day; IRS usually sets the exact date)
    • Q3: September 15, 2025
    • Q4: January 15, 2026

Simple HTML table (U.S. federal, individual focus)

html

<table>
  <thead>
    <tr>
      <th>Date</th>
      <th>What’s due</th>
      <th>Who it affects</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>March 15, 2025</td>
      <td>2024 returns for S-corps and partnerships, or extensions</td>
      <td>Business owners (S-corps, partnerships)</td>
    </tr>
    <tr>
      <td>April 15, 2025</td>
      <td>2024 individual tax return due, or file extension; tax payments due; Q1 2025 estimated tax</td>
      <td>Most individual taxpayers, sole proprietors</td>
    </tr>
    <tr>
      <td>June 16–17, 2025</td>
      <td>Q2 2025 estimated tax payment</td>
      <td>People who pay estimated taxes</td>
    </tr>
    <tr>
      <td>September 15, 2025</td>
      <td>Q3 2025 estimated tax payment</td>
      <td>People who pay estimated taxes</td>
    </tr>
    <tr>
      <td>October 15, 2025</td>
      <td>Final deadline for 2024 return if extension filed</td>
      <td>Anyone who extended their 2024 return</td>
    </tr>
    <tr>
      <td>January 15, 2026</td>
      <td>Q4 2025 estimated tax payment</td>
      <td>People who pay estimated taxes</td>
    </tr>
  </tbody>
</table>

Quick note for Canada

If, instead, you meant Canada’s 2025 tax deadline , the general filing deadline for most individuals is April 30, 2025 , with some variations (e.g., self‑employed) and potential CRA relief or extensions in special cases.

Always confirm the exact date with the IRS or your country’s tax authority, especially if you live in an area affected by disasters or special relief programs.

TL;DR: For U.S. individuals, “tax deadline 2025” for your 2024 return is April 15, 2025; if you extend, you have until October 15, 2025.

Information gathered from public forums or data available on the internet and portrayed here.