For the 2026 U.S. tax filing season (for 2025 tax year returns), the official IRS start date has not been formally announced yet, but multiple tax calendars and refund-date schedules indicate that the IRS is expected to begin accepting 2025 returns in the last week of January 2026 , with many estimating around Monday, January 26, 2026 as a likely opening window. As of late December 2025, the IRS is publicly focusing on “Get Ready” guidance for the upcoming 2026 filing season without giving a firm opening day, which means the exact start date could still shift slightly depending on implementation of new tax law and systems updates.

Quick Scoop

  • The phrase “when does tax season start 2026” typically refers to when the IRS starts accepting individual federal income tax returns for the 2025 tax year.
  • Historically, this falls in the last 7–10 days of January; early 2026 guidance and refund calendars again point to late January 2026 as the practical start of tax season.
  • Some unofficial refund calendars suggest IRS e‑file acceptance could begin as early as January 26, 2026 , but this remains an estimate until the IRS issues a formal press release with the exact opening date.

What is officially known?

  • The IRS has issued “Get Ready” notices encouraging taxpayers to prepare documents and understand new rules for the 2026 tax filing season , but those notices focus on preparation steps, not a precise opening day.
  • Current public guidance confirms that Tax Day for 2026 is expected to be April 15, 2026 , for most U.S. taxpayers, consistent with usual federal deadlines when the date does not fall on a weekend or holiday.

Why the exact date might move

  • Opening day sometimes shifts a bit because the IRS must finish programming and testing systems for new credits, deductions, and law changes before processing returns, which can delay the start of tax season by a week or two in some years.
  • For 2026, there are several notable law changes (for example, adjustments to credits and deductions and new rules affecting items like overtime and tips), which the IRS has flagged as reasons taxpayers should pay attention to official updates as filing season approaches.

Forum and “latest news” flavor

Public forum chatter and tax‑pro discussions reflect a mix of anticipation and frustration: many posters mention treating it as “always tax season,” while others focus on how system changes and new credits may push the practical start of heavy filing work into late January or even early February. In parallel, articles and calendars shared in tax communities and finance blogs for “latest news” on 2026 refunds consistently anchor their timelines on a late‑January IRS opening , with refund projections built around a first acceptance date in the last week of January 2026.

Bottom line for planning

  • Plan as though tax season will start in the last week of January 2026 , with January 26 as a commonly cited estimate, but stay flexible until the IRS releases its official announcement.
  • Keep an eye on IRS news releases and the IRS newsroom in early January 2026, as that is where the exact opening date for e‑file will be confirmed.

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