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Plain-English guides to UK Corporation Tax and CT600 filing.

175 results for “CT600”Clear search
21 February 2026

HMRC Penalties for Late Corporation Tax Filing

What are the penalties for filing your CT600 late? Understand HMRC penalty rates, interest charges, and how to avoid or appeal late filing penalties.

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21 February 2026

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.

flat rate vatvat schemecorporation taxct600vat surpluslimited companyhmrc
21 February 2026

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.

charity donationscorporation tax reliefct600gift aidqualifying donationslimited companyhmrc
21 February 2026

Corporation Tax on Bank Interest: How It Works

How is bank interest taxed for UK limited companies? Learn the CT600 treatment, reporting requirements, and how to reduce your corporation tax on savings interest.

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21 February 2026

Pension Contributions & Corporation Tax Relief

How employer pension contributions reduce your CT600 corporation tax bill. Limits, timing rules, and how to claim the deduction for your limited company.

pension contributionscorporation taxct600employer pensiontax relieflimited companyhmrc
21 February 2026

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.

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21 February 2026

Company Tax Return (CT600) vs Annual Accounts: What's the Difference?

CT600 vs annual accounts: one goes to HMRC, one to Companies House. What each is, when they are due, and how they relate.

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21 February 2026

How to Appeal a CT600 Late Filing Penalty from HMRC

Got a CT600 late filing penalty? You may be able to appeal. Step-by-step guide to HMRC penalty appeals, reasonable excuses, and time limits.

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21 February 2026

How to File Your CT600 Yourself in 2026 (Complete DIY Guide)

File your CT600 without an accountant in 2026. What you need, how to prepare accounts, calculate tax, and submit to HMRC.

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21 February 2026

How Long Does HMRC Take to Process a CT600? Processing Times Explained

Find out how long HMRC takes to process your CT600 company tax return, when you'll get your tax calculation, and what to do if it's taking too long.

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21 February 2026

Marginal Relief for Corporation Tax: How It Works (With Calculation Examples)

How marginal relief works for Corporation Tax in 2025/26. Step-by-step calculation for profits between £50,000 and £250,000.

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21 February 2026

Corporation Tax on Cryptocurrency: How to Report Bitcoin & Crypto on Your CT600

How UK companies pay corporation tax on crypto. Buying, selling, mining, staking, DeFi, and NFTs — what goes on your CT600.

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