Corporation Tax Deadlines 2026: When You Need to File and Pay
All corporation tax deadlines for 2026 — CT600 filing dates, payment due dates, and penalties for late filing. Key dates for UK limited companies.
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Plain-English guides to UK Corporation Tax and CT600 filing.
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Do I Need an Accountant for Corporation Tax? When DIY Makes Sense
Find out whether you need an accountant for corporation tax or can file your CT600 yourself. Honest guide for UK limited company directors.
Small Company Corporation Tax Rates 2025/2026: Complete Guide
Understand corporation tax rates for small companies in 2025/2026, including the 19% and 25% thresholds, marginal relief calculation, and associated companies rules.
First Year Corporation Tax: A Complete Guide for New Companies
New limited company? Learn when to register for corporation tax, your first accounting period, filing deadlines, and how to avoid common first-year mistakes.
Director's Loan Account and Corporation Tax: What You Need to Know
Understand how a director's loan account affects your corporation tax, including the S455 charge at 33.75%, repayment rules, and CT600 reporting.
Corporation Tax Refund: How to Get Money Back If You Overpaid HMRC
Overpaid corporation tax? Learn how to claim a refund from HMRC, amend your CT600, and understand timelines for getting your money back.
How to Use HMRC Government Gateway to File Your CT600
Step-by-step guide to setting up and using your HMRC Government Gateway account to file your CT600 Corporation Tax Return online.
Corporation Tax Relief on Charity Donations
How to claim corporation tax relief on charitable donations. Covers qualifying payments, Gift Aid, non-cash gifts, and how to report donations on your CT600.
Flat Rate VAT Scheme & Corporation Tax
How the Flat Rate VAT Scheme affects your corporation tax. Learn about the VAT surplus, how to report it on your CT600, and whether the scheme still saves money.
Buy-to-Let Through a Company: Tax Guide
Should you hold buy-to-let property in a limited company? Complete guide to corporation tax on rental income, mortgage interest relief, and when a company structure makes sense.
Disallowable Expenses for Corporation Tax (Full List)
Which expenses can't you deduct on your CT600? Complete guide to disallowable expenses for corporation tax — entertaining, fines, personal costs, and more.
Electric Company Cars: Corporation Tax 2025
Buy an electric car through your company and claim 100% first-year allowance. Learn about BIK rates, capital allowances, and CT savings for EVs in 2025/26.