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

182 results for “CT600”Clear search
21 February 2026

Pension Contributions & Corporation Tax Relief

How employer pension contributions reduce your CT600 corporation tax bill. Limits, timing rules, and how to claim the deduction for your limited company.

pension contributionscorporation taxct600employer pensiontax relieflimited companyhmrc
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

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 Bank Interest: How It Works

How is bank interest taxed for UK limited companies? Learn the CT600 treatment, reporting requirements, and how to reduce your corporation tax on savings interest.

corporation taxbank interestct600loan relationshipsnon-trading incomehmrclimited company
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.

charity donationscorporation tax reliefct600gift aidqualifying donationslimited companyhmrc
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

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

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

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
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