UK LTD Annual Compliance Calendar 2026: Deadlines, Filings & Penalties
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Running a UK Limited Company comes with a set of mandatory annual obligations. Missing a deadline can result in automatic penalties from both HMRC and Companies House — even if your company is dormant or you’re a non-resident director.
This calendar breaks down every key deadline your LTD must meet in 2026, so you never miss a filing.
📅 Key Dates for Your UK LTD in 2026
1. Confirmation Statement (Companies House)
Deadline: Once every 12 months — exactly one year after incorporation or your last statement.
What it is: A snapshot of your company’s key details: directors, shareholders, registered office address, SIC codes, and share capital.
Fee: £34 (online) / £62 (paper).
Penalty for late filing: Companies House can strike off your company from the register. In practice, repeated failure leads to compulsory strike-off proceedings.
2. Annual Accounts (Companies House)
Deadline: 9 months after your company’s financial year-end (Accounting Reference Date).
- If your ARD is 31 December → file by 30 September 2026
- If your ARD is 31 March → file by 31 December 2026
What it is: Full statutory accounts including balance sheet, profit & loss, and notes.
Penalties for late filing:
| Delay | Penalty |
|---|---|
| Up to 1 month | £150 |
| 1-3 months | £375 |
| 3-6 months | £750 |
| More than 6 months | £1,500 |
Penalties double if you file late two years in a row.
3. Corporation Tax Return — CT600 (HMRC)
Deadline: 12 months after the end of your Corporation Tax accounting period.
What it is: Your company’s tax return showing taxable profits and Corporation Tax due.
Payment deadline: Corporation Tax must be paid within 9 months and 1 day after the period end — before the CT600 filing deadline.
Penalty for late CT600:
- 1 day late: £100
- 3 months late: another £100
- 6 months late: HMRC estimates your tax bill + 10% penalty
- 12 months late: additional 10% penalty
4. VAT Returns (if registered)
Deadline: Quarterly — 1 month and 7 days after the end of your VAT period.
Penalty: Late submission penalty points system. At 4 points → £200 fine, then £200 per additional late submission.
Making Tax Digital (MTD) compliance is mandatory — all VAT returns must be filed through MTD-compatible software.
5. PAYE & Payroll (if you employ staff)
Deadline: Monthly — Full Payment Submission (FPS) must be sent to HMRC on or before each payday.
Penalty: Late FPS penalties depend on number of employees. Up to £400/month for 50+ employees.
⚠️ Common Mistakes Non-Resident Directors Make
- Assuming dormancy means no filings — Even dormant companies must file Confirmation Statements and dormant accounts.
- Missing the ARD (Accounting Reference Date) — The default ARD is the anniversary of incorporation, not 31 December.
- Paying Corporation Tax late — The payment deadline (9 months + 1 day) is earlier than the filing deadline (12 months).
- Ignoring HMRC letters sent to the registered office — Non-resident directors often miss physical mail, leading to escalated penalties.
- Not registering for Corporation Tax within 3 months — You must register within 3 months of starting business activity, not incorporation.
🗓️ Quick Reference Calendar for 2026
| Month | Action |
|---|---|
| January | Check your ARD. If Dec 31 year-end → start preparing Annual Accounts. |
| April | New tax year starts (6 April). Review director salary & dividend strategy. |
| July | Mid-year review. If ARD is Sept 30 → prepare CT600. |
| September | Deadline for Dec 31 year-end Annual Accounts filing at Companies House. |
| October | Corporation Tax payment deadline for Dec 31 year-end (9 months + 1 day). |
| December | CT600 filing deadline for Dec 31 year-end. |
✅ How Semper Paratus Can Help
We manage the entire annual compliance cycle for your UK LTD:
- ✅ Confirmation Statement — filed on time, every year
- ✅ Annual Accounts — prepared by qualified accountants, filed to Companies House
- ✅ CT600 Corporation Tax Return — calculated, prepared, and submitted to HMRC
- ✅ VAT registration & returns — MTD-compliant filing
- ✅ Registered office address — all official mail received and forwarded
- ✅ Dedicated company manager — single point of contact for all compliance matters
Your accounting subscription starts from just 400 PLN/month (company without employees). Larger companies — contact us for a tailored quote.
📞 PL: +48 530 447 230 | UK: +44 745 638 6117
📧 [email protected]
🔗 Book a free consultation
Last updated: April 2026. This article provides general guidance and does not constitute legal or tax advice. Always consult with a qualified professional for your specific situation.
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