More than 4,600 people filed their Self Assessment tax return on Christmas Day, ahead of the 31 January deadline.
The figure for festive filers was up on the 4,409 who did the same in 2024.
In total, 4,606 tax returns were submitted on 25 December, with the busiest hour between 13:00 and 13:59 when 359 returns were received.
On Christmas Eve, 22,350 tax returns were sent in, with 10,479 on 26 December.
HM Revenue & Customs (HMRC) said 37,435 people filed between Christmas Eve and Boxing Day The figure was 40,072 for the same period in 2024.
Myrtle Lloyd, HMRC’s chief customer officer, said:
“Millions of customers have already completed their tax returns and can start 2026 with one less thing to worry about.
“For anyone yet to file, don’t leave it until the last minute. Filing now means you know exactly what you owe and have time to arrange payment. Search ‘Self Assessment’ on GOV.UK to get started.”
From 6 April 2026, sole traders and landlords with a turnover above £50,000 will be required to use Making Tax Digital (MTD) for Income Tax and submit quarterly summaries of their income and expenses to HMRC.