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

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
21 February 2026

Buy-to-Let Through a Company: Tax Guide

Should you hold buy-to-let property in a limited company? Complete guide to corporation tax on rental income, mortgage interest relief, and when a company structure makes sense.

buy-to-letcorporation taxproperty companyrental incomemortgage interestlimited companysection 24
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

Company Losses: Trading vs Non-Trading on CT600

Trading losses, non-trading deficits, capital losses — learn the different types of company loss, how each is relieved, and where they go on your CT600.

company lossestrading lossesnon-trading lossescorporation taxct600loss reliefcarry forwardcarry back
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

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.

corporation taxrental incomeproperty incomect600buy to letproperty companylimited company landlord
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