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

184 results for “ct600”Clear search
21 February 2026

Corporation Tax on Goodwill & Intangible Assets

How goodwill and intangible assets are treated for Corporation Tax. Covers the acquisition date rules, writing-down allowances, rollover relief, and CT600 reporting.

corporation-taxintangible-assetsgoodwillct600capital-allowances
21 February 2026

Corporation Tax for Investment Companies

How does corporation tax work for investment companies? Guide to holding investments through a limited company — dividends, capital gains, property, and filing your CT600.

corporation taxinvestment companyholding companydividendscapital gainsct600property investment
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 Overseas Income: Guide

How UK companies pay corporation tax on overseas income. Covers foreign trading profits, dividends, rental income, double taxation relief, and CT600 reporting.

corporation taxoverseas incomeforeign incomedouble taxation reliefCT600UK companyinternational tax
21 February 2026

Overdrawn Director's Loan Account & S455 Tax Explained

Owe money to your company? Learn how an overdrawn director's loan account triggers S455 tax on your CT600, how much you'll pay, and how to get it back.

directors loans455corporation taxct600overdrawn loanclose companyhmrc
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.

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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.

hmrc penaltieslate filingcorporation taxct600interest chargesappeallimited company
21 February 2026

Limited Company Expenses You Can Claim

Complete guide to allowable limited company expenses for Corporation Tax. Covers office costs, travel, staff, professional fees, and what HMRC disallows.

corporation-taxexpenseslimited-companyallowable-expensesct600
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

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.

corporation taxcryptocurrencybitcoinct600hmrccrypto taxcapital gainstrading
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