PAYE and CIS payments
Electronic payments due by the 22nd of each month (19th by post) for the tax month ending on the 5th. Quarterly payers pay by 22 July, 22 October, 22 January and 22 April.
Free calendar download
UK tax and Companies House deadlines calendar 2026/27
Every fixed statutory deadline for the 2026/27 tax year in one place, plus the recurring dates that depend on each client. Download the calendar file and the dates appear in Outlook, Google or Apple Calendar with a reminder a week ahead.
No email required. The file is created in your browser.
Fixed dates for 2026/27
Tax year
5 April 2026
2025/26 tax year ends
End of the tax year for Self Assessment, payroll and most personal tax planning.
6 April 2026
2026/27 tax year begins
New rates, thresholds and payroll codes apply from today.
5 April 2027
2026/27 tax year ends
Last day for 2026/27 personal tax planning, ISA and pension allowances.
Payroll
19 April 2026
Final PAYE submission for 2025/26
Final FPS or EPS for the 2025/26 tax year must reach HMRC.
19 April 2026
Postal PAYE and CIS payment for month to 5 April 2026
Cheque payments must reach HMRC by the 19th; electronic payments by the 22nd.
2 May 2026
P46(car) for quarter to 5 April 2026
Report cars provided or withdrawn in the quarter where not reported through payroll.
31 May 2026
P60s to employees
Give every employee employed on 5 April 2026 their P60 for 2025/26.
6 July 2026
P11D and P11D(b) filing
Report expenses and benefits for 2025/26 and give copies to employees. Also the deadline for employment-related securities returns.
22 July 2026
Class 1A NIC payment
Electronic payment of Class 1A National Insurance on 2025/26 benefits must clear (19 July if paying by post).
2 August 2026
P46(car) for quarter to 5 July 2026
Quarterly company car reporting where not payrolled.
2 November 2026
P46(car) for quarter to 5 October 2026
Quarterly company car reporting where not payrolled.
2 February 2027
P46(car) for quarter to 5 January 2027
Quarterly company car reporting where not payrolled.
Companies
30 April 2026
ATED return and payment
Annual Tax on Enveloped Dwellings return and payment for the year from 1 April 2026, where applicable.
31 March 2027
Corporation Tax returns for periods ended 31 March 2026
CT600 returns are due 12 months after the period end.
Self Assessment
31 July 2026
Second payment on account for 2025/26
Second Self Assessment instalment due. Consider a reduction claim where income has fallen.
5 October 2026
Register for Self Assessment for 2025/26
Deadline to tell HMRC about new sources of income or gains for 2025/26.
31 October 2026
Paper Self Assessment returns for 2025/26
Paper returns must reach HMRC today; online filing continues to 31 January 2027.
30 December 2026
Online filing to collect tax through your PAYE code
File the 2025/26 return online by today to ask HMRC to collect tax owed through the 2027/28 tax code, subject to limits.
31 January 2027
Self Assessment filing and payment for 2025/26
Online return, balancing payment and first payment on account for 2026/27 all due today.
Deadlines that depend on the client
These are not fixed calendar dates, which is why a shared calendar stops working once a practice passes a few dozen clients.
CIS monthly returns
Due by the 19th of each month for the return period ending on the 5th. Nil returns are still required unless HMRC has been told the contractor is inactive.
RTI Full Payment Submissions
On or before every payday, for every client you run payroll for.
VAT returns and payments
Normally due one calendar month and seven days after the end of each VAT period, filed through MTD-compatible software.
Company accounts
Nine months after the accounting reference date for a private company; 21 months after incorporation for a first long period.
Confirmation statements
At least once every 12 months, within 14 days of the end of the review period.
Corporation Tax payment
Nine months and one day after the accounting period end for companies outside the instalment regime.
Track every client's dates automatically. Remindoo pulls company details and filing dates from Companies House and creates recurring tasks and reminders per client, so nothing depends on someone updating a calendar.
Calendar questions
What are the main UK tax deadlines in 2026/27?
The fixed dates are 19 April 2026 for the final 2025/26 PAYE submission, 31 May for P60s, 6 July for P11Ds, 22 July for Class 1A NIC, 31 July for the second Self Assessment payment on account, 5 October to register for Self Assessment, 31 October for paper returns, and 31 January 2027 for online Self Assessment filing and payment.
Can I import these deadlines into my calendar?
Yes. Download the calendar file on this page and open it in Outlook, Google Calendar or Apple Calendar. Each deadline is created as an all-day event with a reminder a week before.
Why aren't my clients' accounts deadlines in the file?
Accounts, Corporation Tax and confirmation statement dates depend on each company's own year end, so they are not fixed calendar dates. Use the Companies House deadline checker for a single client, or Remindoo to track every client automatically.
Are these dates guaranteed?
They are the standard statutory dates at the time of writing. Dates can move, and HMRC occasionally announces easements. Always confirm against current GOV.UK guidance before relying on a date.
How do accountants track client deadlines at scale?
Practices normally stop using a shared calendar once they pass a few dozen clients, because deadlines vary per client. Remindoo pulls dates from Companies House and generates recurring tasks and reminders per client instead.
- Companies House deadline checker →
- Deadline tracking software →
- How to track Companies House deadlines →
- Accounting glossary →
Standard statutory dates at the time of writing, for general information only. Dates can change — confirm against GOV.UK ↗ before relying on them.
Built for UK practice growth
Every deadline. Every client. One system.
Start with the workflows that cause the most chasing, then bring leads, AML, proposals and clients into the same calm operating system.
Why recording every task matters in an accountancy practice
Accounting firms run on deadlines: VAT returns, payroll, confirmation statements, accounts and Self Assessment. Recording every job as a task, with an owner and a date, is the simplest way to make sure nothing is missed.
Avoid penalties
HMRC and Companies House charge penalties for late filing. A task for every deadline, with an internal date before it, gives the team a buffer.
Nothing depends on memory
Recorded tasks mean work continues when someone is off sick, on leave or has left the firm.
Consistent quality
Subtask checklists make every job follow the same steps and reviews, whoever does the work.
Visibility for managers
Filters by owner, status and deadline show at a glance what is late, what is due and who needs help.
Practical tips from UK practice
- Set an internal deadline two to four weeks before every statutory deadline.
- Use recurring tasks for repeat work such as VAT, payroll and bookkeeping.
- Break larger jobs into subtasks, including a review step.
- Comment on the task instead of by email, so the history stays with the work.
Related Remindoo features
Written and reviewed by Waqas Sagar ACA FCCA FMAAT, Chartered Accountant with 18+ years in practice. Founder and MD of Accotax, an ICAEW, ACCA and AAT regulated London practice that has served over 5,000 clients, and founder of Remindoo. Guidance is general; check current GOV.UK and professional body guidance for your firm.
What UK practices say about Remindoo
Read all reviews on Trustpilot“With Remindoo, everything from the first enquiry to onboarding and ongoing client management is tracked in one place… It saves us hours and gives me, as a practice owner, complete visibility of where the firm stands.”
“The biggest benefit is having clients, tasks, deadlines, workflows, proposals and communication all organised in one place.”
“During my trial, the team were absolutely amazing. They helped onboard my clients, set up my settings and made sure everything was ready for me to use… they made the whole process completely stress-free.”
“It brings client information, tasks, recurring deadlines, workflows and reminders together in one place, giving us much better visibility across the team.”
