The Ultimate UK Accountant Calendar for 2026
TLDR: A month-by-month guide to HMRC tax deadlines, payroll cut-offs, VAT reminders, CPD events, and government reporting dates.
Staying ahead of reporting timelines is essential for accountants and finance teams. This guide brings every key date for 2026 into one digestible calendar—perfect for client reminders, internal planning and practice marketing.
🗓 Monthly Deadlines & Key Events
| Month | Event / Deadline | Applies To | Date | Notes |
|---|---|---|---|---|
| January | New Year’s Day bank holiday | All | 1 Jan | Public holiday |
| ACCA CPD declaration deadline | ACCA members | 1 Jan | Maintain membership status | |
| Self-assessment online tax return & payment deadline (24/25) | Individuals | 31 Jan | Final filing + tax payment | |
| First payment on account | SA taxpayers | 31 Jan | First 25/26 instalment | |
| March | Spring Budget / Fiscal Forecast | UK wide | 3 Mar | Likely tax policy updates |
| Festival of Accounting & Bookkeeping (FAB) | Practice | 11–12 Mar | NEC Birmingham, CPD opportunity | |
| April | Good Friday | All | 3 Apr | Bank Holiday |
| Easter Monday | All | 6 Apr | Bank Holiday | |
| End of tax year 2025–26 | All | 5 Apr | Final planning deadline | |
| New tax year begins | All | 6 Apr | Allowances reset | |
| Making Tax Digital (ITSA) record-keeping starts | Sole traders + landlords > £50k | 6 Apr | MTD activation milestone | |
| Final FPS/EPS deadline (previous year) | Employers | 19 Apr | Final RTI submission | |
| May | P60s to employees | Employers | 31 May | Must issue by this date |
| Early May bank holiday | All | 4 May | Bank Holiday | |
| Spring bank holiday | All | 25 May | Bank Holiday | |
| Accountex London | Accountants | 13–14 May | ExCeL CPD conference | |
| June | Prepare P11D / P11D(b) data | Employers | By 6 Jul | Data collection reminder |
| July | P11D & Class 1A NIC filing deadline | Employers | 6 Jul | Submit & issue forms |
| Class 1A NIC payment due | Employers | 22 Jul (19th if postal) | HMRC deadline | |
| Second payment on account | SA taxpayers | 31 Jul | Mid-year instalment | |
| August | MTD ITSA quarterly update #1 | MTD users | 7 Aug | First digital return |
| Summer bank holiday | UK | 31 Aug | Bank holiday | |
| September | Accountex Summit Manchester | Practices | 15 Sep | One-day CPD |
| October | Digital Accountancy Show | Practice | 7–8 Oct | ExCeL London |
| Class 1B NIC / PAYE settlement payment | Employers | 22 Oct (19th postal) | Settlement deadline | |
| Paper SA tax return deadline (25/26) | Individuals | 31 Oct | Paper returns only | |
| November | MTD ITSA quarterly update #2 | MTD users | 7 Nov | Digital filing due |
| December | Register for Self Assessment (25/26 tax year) | Individuals | 5 Oct | HMRC notification deadline |
| Submit return via PAYE coding route | Individuals | 30 Dec | PAYE collection opt-in | |
| Christmas Day bank holiday | All | 25 Dec | Holiday | |
| Boxing Day substitute holiday | All | 28 Dec | Holiday |
Import to your Outlook, Google or Apple calendar
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