2026-08

UK self-employed tax calendar

Four dates run the Self Assessment year and four more run MTD. The list below links the two payment moments to their own pages, and the calendar underneath shows each MTD quarter as a range, like a diary.

Add the dates to your calendar (.ics)

One file, works with Google Calendar, Apple Calendar and Outlook.

The dates

2026-10-05 Register for Self Assessment (new in 2025/26)
2026-10-31 Paper return deadline, 2025/26
2027-01-31 Online return, balancing payment and first payment on account
2027-04-06 New tax year; MTD reaches gross incomes over 30,000
2027-07-31 Second payment on account, 2026/27
2027-10-31 Paper return deadline, 2026/27
2028-01-31 Online return, balancing payment and first payment on account

MTD quarterly updates shown in the calendar use the standard quarters (6th to 5th, due the 7th a month after). If you elected calendar quarters, yours shift by five days.

October 2026

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