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

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22 February 2026

Filing Annual Accounts at Companies House: Complete Guide for Limited Companies

Everything you need to know about filing your company's annual accounts at Companies House — deadlines, formats, micro-entity vs small company, and penalties.

Companies Houseannual accountsiXBRLfilinglimited company
22 February 2026

First Year Corporation Tax: What New Limited Companies Need to Know

Just incorporated? Here's your complete guide to corporation tax in your first year — registration, deadlines, what to file, and how to pay.

corporation taxnew companyfirst CT600limited companyHMRC registration
22 February 2026

How to Pay Corporation Tax: Complete HMRC Payment Guide 2025/26

Step-by-step guide to paying your corporation tax bill. Covers all payment methods, deadlines, payment references, and what happens if you pay late.

corporation taxHMRC paymentpayment referenceCT600tax deadline
22 February 2026

HMRC Free Filing Has Closed: What to Use Instead

HMRC's free CT600 filing service closed on 31 March 2026. Step-by-step guide to choosing a replacement and filing your Corporation Tax return.

hmrcct600free-filingreplacement2026
21 February 2026

CT600 Box-by-Box Guide: Every Core Box Explained (2025/26)

Complete walkthrough of every CT600 box from 1 to 620. Plain English explanations, what to enter, and which boxes most small companies actually use.

21 February 2026

How Are Dividends Taxed for Corporation Tax? A Complete Guide

How dividends interact with Corporation Tax — paying dividends, receiving dividends, the dividend exemption, franked investment income, and CT600 reporting for UK companies.

dividendscorporation taxct600franked investment incomedividend exemptionlimited companytax
21 February 2026

Do I Need an Accountant for Corporation Tax? When DIY Makes Sense

Find out whether you need an accountant for corporation tax or can file your CT600 yourself. Honest guide for UK limited company directors.

corporation-taxaccountantct600diylimited-companymicro-entity
21 February 2026

Small Company Corporation Tax Rates 2025/2026: Complete Guide

Understand corporation tax rates for small companies in 2025/2026, including the 19% and 25% thresholds, marginal relief calculation, and associated companies rules.

corporation tax ratessmall company2025/2026marginal reliefCT600
21 February 2026

First Year Corporation Tax: A Complete Guide for New Companies

New limited company? Learn when to register for corporation tax, your first accounting period, filing deadlines, and how to avoid common first-year mistakes.

first year corporation taxnew companyCT600company registrationHMRC
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

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

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
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