26/03/2026
UK Tax Deadlines You Can’t Afford to Miss in 2026
If you run a business in the UK, staying on top of tax deadlines isn’t optional—it’s essential. Miss one, and you could face penalties you really don’t need.
Here’s your quick, save-worthy guide 👇
💼 Self-Assessment
- 31 January 2026 – Online tax return deadline + final payment for 2024/25
- 31 July 2026 – Second payment on account
🚨 Quarterly Filers: April is a key deadline
- If your VAT quarter ends 31 March, your return & payment are due 7 May 2026
- Standard rule: due 1 month + 7 days after your VAT period ends
🏢 Corporation Tax
- Payment due 9 months + 1 day after your accounting period ends
- Company tax return due 12 months after the end of the accounting period
Pro tip: Set reminders ahead of time—or better yet, have an expert handle it for you.
📌 Save this post so you never miss a deadline. Or Better Yet, just Contact Us: https://www.housleyknight.co.uk/
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