Start with the situation, not just the date

A federal tax date is useful only after you know which situation you are checking. April 15, 2026 is the regular federal filing date for most calendar-year 2025 individual income tax returns and also appears as the first 2026 estimated-tax payment date. June 15, September 15, October 15, and January 15 can each mean different things depending on the form, payment period, or extension path. Business, payroll, excise, and information-return rows have their own conditions.

This planner is meant to reduce thin date lookup behavior. Instead of asking only “what date is next,” use it to decide which Punilog page and official IRS source should be opened before action. The page still does not tell you whether a form applies, how much to pay, or whether a penalty rule affects you.

Situation map

Recommended order for checking a 2026 tax date

• Identify the taxpayer or entity type first: individual, business, employer, payroll depositor, estate, trust, or another category.
• Identify the form, return year, payment period, or extension path. Do not use a date from a different cycle.
• Open the Punilog page that matches that situation and use its official-source links.
• Open the IRS source directly and look for the current revision date, form instructions, or calendar row.
• Save the source link and the date checked with your records before filing, paying, or mailing anything.

Common mistakes this planner is meant to prevent

The first mistake is treating an extension as a payment extension. IRS extension language is explicit that extra time to file is not extra time to pay. The second mistake is using a general household tax article for a payroll or business deposit date. Many monthly and quarterly rows are not broad individual deadlines. The third mistake is ignoring the cycle label. January 15, 2027 belongs to the fourth 2026 estimated-tax payment cycle; it is a future-cycle date, not a general 2027 annual tax calendar. The fourth mistake is assuming state tax timing follows the federal date. State dates need separate state source review and are outside this page.

What to do if two sources look different

If a Punilog page, an IRS publication, a form PDF, and a current IRS webpage appear to point to different timing, pause and verify the exact scope. A publication can explain a general rule while a form instruction gives a specific payment schedule. A current IRS page may update after a static PDF. A date may move because of a weekend or legal holiday. Use the official source most specific to your form and cycle, and use the Punilog correction path if this site needs an update.