UK tax calendar
UK tax deadlines
The key dates everyone shares. Your own deadlines (VAT, company accounts, Corporation Tax) depend on your year end and VAT quarters, and Octotax works those out for you.
April 2026
6
Mon
Tax year 2026/27 startsPassed
New allowances and rates apply.
May 2026
31
Sun
P60s to employeesPassed
For everyone employed at 5 April 2026.
Payroll & PAYE · GOV.UK (opens in new tab)
July 2026
6
Mon
P11D & P11D(b) deadlinePassed
Benefits in kind for 2025/26.
Payroll & PAYE · GOV.UK (opens in new tab)
22
Wed
Class 1A NIC paymentPassed
On 2025/26 benefits (paid electronically).
Payroll & PAYE · GOV.UK (opens in new tab)
31
Fri
2nd payment on accountPassed
Second advance payment towards 2025/26.
Self Assessment · GOV.UK (opens in new tab)
August 2026
7
Fri
October 2026
5
Mon
Register for Self AssessmentPassed
If you need to file for 2025/26 for the first time.
Self Assessment · GOV.UK (opens in new tab)
31
Sat
Paper Self Assessment returnPassed
Paper returns for 2025/26.
Self Assessment · GOV.UK (opens in new tab)
November 2026
7
Sat
December 2026
30
Wed
File online to pay through your tax code
If you owe under £3,000 for 2025/26 and are employed.
Self Assessment · GOV.UK (opens in new tab)
January 2027
31
Sun
Online Self Assessment return + payment
File 2025/26, pay the balance and the 1st payment on account for 2026/27.
Self Assessment · GOV.UK (opens in new tab)
February 2027
7
Sun
April 2027
5
Mon
Tax year 2026/27 ends
Last day to use this year's allowances.
Deadlines that depend on you
These repeat, or depend on your year end or VAT quarters.
22nd of every month
PAYE payment
For the tax month ending on the 5th (paying electronically).
19th of every month
CIS monthly return
Contractors in the Construction Industry Scheme.
1 month + 7 days after each period
VAT return + payment
Quarterly or monthly, depending on your VAT stagger.
9 months + 1 day after year end
Corporation Tax
CT600 return due 12 months after year end.
9 months after year end
Company accounts
Confirmation statement at least every 12 months.
60 days after completion
Property Capital Gains Tax
UK residential property sales with tax to pay.
Get your own deadlines, with reminders.
Answer a few questions and Octotax works out every date that applies to you. Free.
Get started freeGeneral information, not tax advice. Dates assume online filing and electronic payment.