UK Freelancer Tax Deadlines 2026: Complete Calendar
Missing a tax deadline costs money. Late filing penalties. Late payment interest. HMRC stress you don't need.
But UK tax deadlines are confusing — Self Assessment, VAT returns, payments on account, National Insurance... and they all fall on different dates.
This guide is your complete 2026 tax calendar for UK freelancers. Bookmark it. Set reminders. Never miss a deadline again.
Quick Reference: Key Dates for 2026
| Date | Deadline | Who |
|---|---|---|
| 31 Jan 2026 | Self Assessment tax return + payment (2024/25) | All self-employed |
| 31 Jan 2026 | Payment on account (1st installment for 2025/26) | If owed £1,000+ last year |
| 5 Apr 2026 | End of tax year 2025/26 | All |
| 19 Apr 2026 | Class 2 NICs deadline (if voluntary) | Low earners |
| 31 Jul 2026 | Payment on account (2nd installment for 2025/26) | If owed £1,000+ in 2024/25 |
| 5 Oct 2026 | Register for Self Assessment (if newly self-employed) | New freelancers |
| 31 Jan 2027 | Self Assessment tax return + payment (2025/26) | All self-employed |
Self Assessment Tax Return Deadlines
Paper Tax Return Deadline
31 October 2026If you're filing a paper tax return for 2025/26, HMRC must receive it by midnight on 31 October 2026.
Who this applies to: Almost no one. Paper returns are rare and slow. File online instead.
Online Tax Return Deadline
31 January 2027Online Self Assessment for tax year 2025/26 must be filed by midnight on 31 January 2027.
Who this applies to: All sole traders, partnerships, and anyone earning untaxed income over £1,000/year.
Penalty for missing: £100 immediate fine, then £10/day after 3 months (capped at £900), then further penalties after 6/12 months.
Tax Payment Deadlines
Balancing Payment
Payment for 2024/25 Tax Year
31 January 2026Any tax you owe for 2024/25 (after deducting payments on account) must be paid by 31 January 2026.
Penalty for late payment: 5% of unpaid tax if 30 days late, another 5% at 6 months, another 5% at 12 months. Plus daily interest (currently 7.75%).
Payments on Account
If you owed more than £1,000 in tax last year (and less than 80% was deducted at source), you'll make two advance payments toward next year's tax bill.
How it works: HMRC estimates your 2025/26 tax bill based on 2024/25. You pay half upfront in January, half in July.
First Payment on Account (2025/26)
31 January 2026Pay 50% of your estimated 2025/26 tax bill.
Example: If you owed £6,000 tax in 2024/25, you'll pay £3,000 on 31 Jan 2026 (toward 2025/26).
Second Payment on Account (2025/26)
31 July 2026Pay the remaining 50% of your estimated 2025/26 tax bill.
Example: Another £3,000 on 31 Jul 2026 (continuing above example).
VAT Return Deadlines (If VAT-Registered)
VAT-registered freelancers must submit quarterly VAT returns and make payments.
VAT Return Periods (Standard Quarterly)
| VAT Period | Return & Payment Due |
|---|---|
| 1 Jan – 31 Mar 2026 | 7 May 2026 |
| 1 Apr – 30 Jun 2026 | 7 Aug 2026 |
| 1 Jul – 30 Sep 2026 | 7 Nov 2026 |
| 1 Oct – 31 Dec 2026 | 7 Feb 2027 |
Deadline: 1 month + 7 days after the end of each VAT period.
Penalty for late filing: Points-based system (new as of 2023). Accumulate too many points = £200 fine. Late payment incurs 2% penalty after 15 days, another 2% after 30 days, plus daily interest.
National Insurance Deadlines
Class 2 NICs (Self-Employed)
If you earn over £12,570/year (2025/26 threshold), you pay Class 2 NICs automatically via Self Assessment.
Deadline: Same as your tax payment — 31 January 2027 (for 2025/26).
Rate: £3.45/week (£179.40/year).
Class 4 NICs (Self-Employed Profits)
If you earn over £12,570/year, you also pay Class 4 NICs on profits:
- 9% on profits between £12,570 and £50,270
- 2% on profits over £50,270
Deadline: Calculated and paid with Self Assessment — 31 January 2027.
Limited Company Deadlines
If you're a freelance limited company director, you have additional deadlines:
Corporation Tax
Deadline: 9 months + 1 day after your company's accounting year-end.
Example: If your accounting year ends 31 March 2026, Corporation Tax is due 1 January 2027.
Company Accounts (Filing with Companies House)
Deadline: 9 months after year-end (or 21 months after incorporation for first accounts).
Penalty for late filing: £150+ depending on how late.
Confirmation Statement
Deadline: At least once every 12 months (usually on your company anniversary).
Penalty for late filing: £150+ fines.
Registration Deadlines (For New Freelancers)
Register for Self Assessment
5 October 2026If you started freelancing in 2025/26 (6 Apr 2025 – 5 Apr 2026), you must register for Self Assessment by 5 October 2026.
Penalty for late registration: £100 fine (even if you owe no tax).
Register for VAT (If Turnover Over £90,000)
Within 30 daysIf your VAT-taxable turnover exceeds £90,000 in any 12-month rolling period, you must register for VAT within 30 days.
Penalty for late registration: Backdated VAT owed + penalties up to 15% of VAT due.
How to Never Miss a Deadline (Action Plan)
1. Set Calendar Reminders Now
Add every deadline to your calendar with 3 alerts:
- 1 month before: "Start gathering records"
- 1 week before: "Final check and submit"
- 1 day before: "Confirm submitted"
2. Keep a Tax Folder (Updated Weekly)
Don't scramble in January. Maintain a running folder with:
- All invoices sent
- All expense receipts
- Bank statements
- Mileage log
Update it every Friday. Takes 15 minutes.
3. Use Accounting Software (Optional but Recommended)
Software like FreeAgent, QuickBooks, or Xero auto-calculates tax estimates and sends deadline reminders.
Read our guide to the best accounting software for UK freelancers.
4. Hire an Accountant (If You Earn £50k+)
An accountant costs £500-2,000/year but saves you from:
- Missing deadlines (they track them for you)
- Overpaying tax (they find deductions you'd miss)
- HMRC errors (they handle disputes)
Worth it once you're earning serious money.
What Happens If You Miss a Deadline?
Late Filing Penalties (Self Assessment)
- 1 day late: £100 fine
- 3 months late: £10/day (max £900)
- 6 months late: 5% of tax owed or £300 (whichever is higher)
- 12 months late: Another 5% or £300
Late Payment Penalties
- 30 days late: 5% of unpaid tax
- 6 months late: Another 5%
- 12 months late: Another 5%
- Plus daily interest: Currently 7.75% per annum
Final Thoughts: Don't Let Tax Deadlines Sneak Up on You
Missing a tax deadline is expensive, stressful, and entirely avoidable.
Your action plan:
- Bookmark this page
- Add all deadlines to your calendar (with reminders)
- Keep tax records updated weekly (not yearly)
- File early (don't wait until 30 January)
- Hire an accountant if your earnings are complex
Tax admin isn't fun. But it's a lot less painful when you're not doing it in a panic at 11:45pm on 30 January.