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

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21 February 2026

Changing Your Company's Accounting Period: How It Affects Your CT600

What happens to your CT600 when you change your accounting period? Guide to the rules, restrictions, and filing implications.

ct600accounting periodyear-endcompanies househmrccorporation tax
21 February 2026

How to File a Nil CT600 Return for a Dormant Company

Step-by-step guide to filing a nil Corporation Tax return for your dormant limited company. Avoid penalties — even dormant companies must file with HMRC.

CT600dormant companynil returnHMRCcorporation tax
21 February 2026

iXBRL Accounts: What Are They and Why You Need Them for Your CT600

What iXBRL accounts are, why HMRC requires them with your CT600, and how to generate them without expensive software. Plain English guide for company directors.

iXBRLCT600HMRCaccountscorporation tax
21 February 2026

HMRC Corporation Tax Online Account: How to Set Up and Use It

Step-by-step guide to setting up your HMRC Corporation Tax online account. Register, activate, and manage your company tax — including how to file your CT600.

HMRCcorporation taxonline accountGovernment Gateway
21 February 2026

Corporation Tax for Freelancers: A Complete Guide for Limited Company Contractors

Corporation tax guide for freelancers with a limited company. Covers allowable expenses, IR35, dividends, and filing your CT600.

corporation taxfreelancercontractorlimited companyIR35
21 February 2026

Corporation Tax Penalties & Interest Charges

Understand HMRC corporation tax penalties for late filing and payment, how interest is calculated, and how to appeal. Complete guide for UK company directors.

corporation taxpenaltiesinteresthmrclate paymentappealct600
21 February 2026

Director's Loan Account: Tax Implications

Complete guide to director's loan account tax implications. Covers overdrawn DLAs, S455 tax, bed and breakfasting rules, and how to stay compliant with HMRC.

directors loan accountDLAs455corporation taxoverdrawnbed and breakfastinglimited company
21 February 2026

Company Share Buyback: Tax Treatment Guide

How UK company share buybacks are taxed. Covers income vs CGT treatment, capital distribution conditions, and when to use a share buyback for your limited company.

share buybackcapital distributionCGTcorporation taxincome taxlimited companycompany purchase of own shares
20 February 2026

CT600 Box by Box Guide: Every Section Explained in Plain English

A complete walkthrough of every CT600 box and section. Understand what each field means, which boxes apply to your company, and how to fill them in correctly.

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20 February 2026

Corporation Tax for Property Companies: A Complete Landlord Guide

Corporation tax for property companies. Mortgage interest relief, capital gains, allowable expenses, and filing your CT600.

corporation taxproperty companybuy to letlandlordCT600
20 February 2026

Closing a Limited Company — Your Final CT600 and What to Do

Step-by-step guide to closing your limited company. Final CT600, capital distributions, strike-off vs MVL, and the mistakes that cost directors money.

closing companyfinal CT600strike offMVLcorporation taxlimited company
20 February 2026

How to File Your CT600 Without an Accountant — Complete Guide

Step-by-step guide to filing your CT600 without an accountant. What you need, how to calculate tax, and how to avoid mistakes.

CT600self-filingcorporation taxno accountantDIY tax returnsave money
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