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

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

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.

electric vehiclecompany carcorporation taxcapital allowancesbenefit in kindbikevct6002025
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 for Small Businesses: 2026

Complete 2026 guide to corporation tax for small businesses. Covers rates, allowable expenses, filing deadlines, payment dates, and tips to reduce your tax bill legally.

corporation taxsmall business2026limited companyCT600small profits ratetax guide
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

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

Company Formation & Corporation Tax Registration

Step-by-step guide to registering for Corporation Tax after forming a limited company. Covers CT41G, UTR numbers, deadlines, and first CT600 filing.

corporation-taxcompany-formationregistrationct600hmrcnew-company
21 February 2026

Corporation Tax on Goodwill & Intangible Assets

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

corporation-taxintangible-assetsgoodwillct600capital-allowances
21 February 2026

Corporation Tax Deadlines Calendar 2026

Full 2026 calendar of Corporation Tax deadlines — CT600 filing dates, payment due dates, penalty dates, and quarterly instalment dates month by month.

corporation-taxdeadlinesct600calendar2026payment
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

R&D Tax Credits for SMEs: Complete Guide to Claiming

How UK small and medium-sized companies can claim R&D tax credits. Covers eligibility, qualifying costs, calculation examples, the merged scheme, and how to include R&D relief on your CT600.

R&D tax creditsresearch and developmentSMEcorporation taxCT600tax reliefHMRCinnovation
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
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