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

186 results for “corporation tax”Clear search
21 February 2026

Close Company Rules & Corporation Tax Explained

Is your limited company a close company? Learn what it means for corporation tax, S455 tax on loans, and how it affects your CT600 filing.

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21 February 2026

HMRC Corporation Tax Refund: How Long?

How long does an HMRC corporation tax refund take? Typical timescales, what causes delays, how to chase a late repayment, and tips to get your refund faster.

corporation taxHMRCrefundrepaymentCT600overpaymentprocessing time
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

Accountant vs DIY CT600 Filing: Honest Comparison

Should you pay an accountant or file your CT600 yourself? An honest comparison of costs, time, risks, and when each option makes sense for UK limited companies.

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21 February 2026

Employer NIC: Corporation Tax Deduction Guide

Is employer NIC an allowable deduction for corporation tax? Yes. Learn how employer National Insurance works, current rates, the Employment Allowance, and how to claim on your CT600.

employer nicnational insurancecorporation taxallowable expensesemployment allowancect600payroll
21 February 2026

CT600 Filing Agent Authorisation with HMRC

How to authorise an agent to file your CT600. Step-by-step guide to HMRC agent authorisation for corporation tax — online, by post, and what to do if things go wrong.

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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.

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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

Corporation Tax Year-End Planning: 12 Tips

Reduce your corporation tax bill before year end. 12 practical planning tips for UK limited companies — from pension contributions to capital allowances and loss relief.

corporation taxyear-end planningtax planninglimited companyallowable expensescapital allowancespension contributions
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

Corporation Tax Marginal Relief Explained

How does marginal relief work for UK corporation tax? Plain-English explanation of the 19%-25% band, the formula, worked examples, and how to claim on your CT600.

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21 February 2026

Corporation Tax on Rental Income: CT600 Guide

How is rental income taxed in a limited company? Learn how property income works on your CT600, allowable deductions, and when a property company makes sense.

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