Free tool · 2026/27 rates · No sign-up
Tax deadline checker
Pick your situation and see every date HMRC and Companies House expect you to hit in 2026/27.
Register for Self Assessment (if newly self-employed)5 October 2026
Online return + balancing payment + first payment on account31 January 2027
Second payment on account31 July 2027
The deadlines that bite hardest
31 January (Self Assessment) is famous; the ones that catch people are quieter: the 60-day CGT return when selling a rental property, the 5 October registration deadline for the newly self-employed, monthly CIS returns on the 19th, and company accounts due nine months after year end — a date that moves with your company, not the calendar.
The honest pitch
Every deadline in this tool is one our clients never have to think about — tracking them is part of every engagement, with reminders before each date and the work done ahead of it. If keeping this list in your head is a background worry, that's exactly the job you can hand over.