MTD Deadline Calculator

Your MTD deadlines from 6 April 2026

Don’t lose your last normal Self Assessment: your 2025/26 return is still filed online the old way, by 31 January 2027. Tax is paid the old way too: any 2025/26 balancing payment — plus, where payments on account apply, your first payment on account for 2026/27 — falls due that same day, with the second on 31 July 2027. A year later, 31 January 2028 brings your first Final Declaration (for 2026/27) and the 2026/27 balancing payment — two different obligations on two consecutive 31 Januaries is the bit people find most confusing.

Soft landing, precisely stated: for the April 2026 cohort, late quarterly updates in 2026/27 don’t earn penalty points — that’s the whole easement. It does not cover the Final Declaration (points apply from day one), late payment, or any year after 2026/27, and all four quarterly updates must still be filed before your Final Declaration is accepted.

• Quarterly updates are cumulative year-to-date figures and create no tax bill — payment dates are unchanged by MTD.
• Deadlines are treated as fixed dates: no published HMRC rule moves a deadline that falls on a weekend or bank holiday, so plan for the date shown.
• Updates can be sent up to 10 days early where the quarter’s information is complete.

The calendar file includes reminders 14 and 3 days before each deadline, and covers both years above, the payment dates around them, and your last normal Self Assessment. It’s generated entirely in your browser — nothing you choose here is sent or stored. Re-downloading after a change updates the events instead of duplicating them.