HMRC Tax Deadlines 2026 for UK Limited Companies — Complete Compliance Calendar
<![CDATA[
Don’t Miss These Critical HMRC Deadlines
Running a UK Limited Company comes with specific filing obligations. Missing deadlines results in automatic penalties from both HMRC and Companies House — and these penalties stack up fast. Here’s your complete 2026 compliance calendar.
1. Annual Accounts (Companies House)
Deadline: 9 months after your company’s financial year-end (for private limited companies). For example, if your year-end is 31 December, accounts must be filed by 30 September.
Late filing penalty: £150 for up to 1 month late, scaling to £1,500+ for over 6 months. These double if you’re late two years in a row.
2. Corporation Tax Return (CT600) — HMRC
Deadline: 12 months after the end of your accounting period. But note: tax payment is due 9 months and 1 day after the period ends.
Late filing penalty: £100 immediately, then £100 after 3 months, with daily penalties after 6 months.
3. Confirmation Statement (Companies House)
Deadline: Every 12 months — within 14 days of your confirmation date (usually the anniversary of incorporation or last statement).
Penalty: Companies House can strike your company off the register for non-filing — and directors can be prosecuted.
How Semper Paratus Can Help
We provide comprehensive UK accounting services for Polish entrepreneurs running LTD companies. Our monthly accounting package includes Annual Accounts, CT600 Corporation Tax Return, and Confirmation Statement filing.
Contact us for a free consultation:
📞 UK: +44 745 638 6117 | PL: +48 530 447 230
📧 [email protected]
🔗 Book a call: https://calendly.com/semperparatus/
📍 42-44 Bishopsgate, EC2N 4AH, London
]]>
