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

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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21 February 2026

Company Struck Off or Dissolved? You May Still Need to File a CT600

Company struck off or dissolved? You may still owe corporation tax. When a final CT600 is required and how to restore a company.

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21 February 2026

CT600 for Contractors: Filing When You're Inside or Outside IR35

How IR35 status affects your CT600. Practical guide for contractors filing corporation tax — inside IR35, outside IR35, or mixed.

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21 February 2026

Working from Home Tax Relief for Limited Companies: What You Can Claim

How to claim work-from-home expenses through your limited company. Flat rate method, actual costs, and allowable expenses.

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21 February 2026

Corporation Tax Interest: Late Payment Rates, Repayment Interest & How to Avoid Charges

HMRC charges interest on late corporation tax at base rate + 2.5%. Learn current rates, how interest is calculated, and how to avoid it.

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21 February 2026

HMRC Enquiry Into Your CT600: What to Expect and How to Respond

Received an HMRC enquiry about your CT600? What triggers enquiries, your rights, what HMRC can ask, and how to respond.

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21 February 2026

Every Corporation Tax Relief Available to UK Companies (2025/26 Complete List)

Every corporation tax relief for UK companies in 2025/26 — R&D, creative industry, patent box, capital allowances, and more.

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21 February 2026

Non-UK Company Trading in the UK? When You Need to Pay Corporation Tax

Non-UK company with UK activities? When you must register for corporation tax, file a CT600, and what counts as a permanent establishment.

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21 February 2026

Company Cars & Corporation Tax: Capital Allowances, BIK, and CT600 Treatment

How company cars affect corporation tax. Capital allowances for cars, benefit in kind rules, and CT600 treatment.

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21 February 2026

Sole Trader vs Limited Company: Full Tax Comparison (2025/26)

Should you incorporate? Tax comparison between sole trader and limited company at every profit level — income tax, NI, dividends.

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21 February 2026

CT600 vs Self Assessment: What's the Difference? (Company vs Personal Tax)

CT600 vs Self Assessment: the key differences between company tax returns and personal tax returns. Who files which and why.

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21 February 2026

Can't Pay Your Corporation Tax? How to Set Up an HMRC Payment Plan

Can't afford your corporation tax bill? Learn how to set up an HMRC Time to Pay arrangement and avoid penalties.

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