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

21 February 2026

Director's Loan Account and Corporation Tax: What You Need to Know

Understand how a director's loan account affects your corporation tax, including the S455 charge at 33.75%, repayment rules, and CT600 reporting.

directors loan accountS455 taxcorporation taxDLACT600
21 February 2026

Corporation Tax Refund: How to Get Money Back If You Overpaid HMRC

Overpaid corporation tax? Learn how to claim a refund from HMRC, amend your CT600, and understand timelines for getting your money back.

corporation taxrefundoverpaymentHMRCCT600
21 February 2026

How to Use HMRC Government Gateway to File Your CT600

Step-by-step guide to setting up and using your HMRC Government Gateway account to file your CT600 Corporation Tax Return online.

ct600hmrcgovernment-gatewaycorporation-taxfiling
21 February 2026

CT600 Nil Return: How to File When Your Company Has No Trading Activity

Learn how and when to file a CT600 nil return for a dormant or non-trading company, including deadlines, penalties, and step-by-step guidance.

ct600nil-returndormant-companycorporation-taxhmrc
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
21 February 2026

HMRC CT600 Online vs Software: Which Is Better?

Compare filing your CT600 through HMRC online vs commercial software. Learn the pros, cons, costs, and which option saves you time and money in 2026.

ct600hmrcfiling softwarecorporation taxonline filingtaxpipelimited company
21 February 2026

UK Corporation Tax Rates: Complete History

Complete history of UK corporation tax rates from 1965 to 2026. See how rates have changed, key reforms, and what current rates mean for your limited company.

corporation taxtax ratesuk tax historyct600limited companyhmrcmarginal relief
21 February 2026

CT600 Filing Agent Authorisation with HMRC

How to authorise an agent to file your CT600. Step-by-step guide to HMRC agent authorisation for corporation tax — online, by post, and what to do if things go wrong.

ct600hmrcagent authorisationcorporation taxfiling agentaccountantgovernment gateway
21 February 2026

Accountant vs DIY CT600 Filing: Honest Comparison

Should you pay an accountant or file your CT600 yourself? An honest comparison of costs, time, risks, and when each option makes sense for UK limited companies.

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