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

88 results for “Guide”Clear search
23 February 2026

CT600 Capital Allowances — AIA, Full Expensing, and Writing Down Allowances Explained

Complete guide to claiming capital allowances on your CT600. Covers Annual Investment Allowance (AIA), full expensing, writing down allowances, and which boxes to fill in.

ct600capital-allowancesaiacorporation-taxguide
23 February 2026

CT600 Filing for First-Time Directors — Complete Beginner Guide

New company director? This beginner-friendly guide explains CT600 corporation tax returns: what they are, when to file, what you need, and how to do it yourself.

ct600beginnersdirectorscorporation-taxguide
23 February 2026

How to File CT600 Online After HMRC Free Service Closes

Step-by-step guide to filing your CT600 corporation tax return online using commercial software after HMRC discontinues its free filing service in March 2026.

ct600hmrcfilingguidecorporation-tax
23 February 2026

CT600 Box-by-Box Guide for Small Companies (2025/26)

Plain English explanation of every CT600 box that matters for a typical small limited company. No jargon, no confusion.

ct600guidesmall-businessboxes
23 February 2026

How to File a CT600 for a Dormant Company (Step-by-Step)

Complete guide to filing a dormant company CT600. Even if your company did nothing, you still need to file. Here's exactly how.

ct600dormant-companyhmrcguide
23 February 2026

Corporation Tax Rates 2025/26: Complete UK Guide

All UK Corporation Tax rates for 2025/26 including small profits rate, main rate, marginal relief, and associated company rules. With worked examples.

corporation-taxtax-rates2025-26marginal-relief
23 February 2026

HMRC Government Gateway for Corporation Tax: Setup & Navigation Guide

Step-by-step guide to setting up and using HMRC Government Gateway for Corporation Tax. How to register, enrol for CT, view your account, and manage your tax.

hmrcgovernment-gatewaycorporation-taxguide
23 February 2026

Corporation Tax for Landlords: Running a Property Company in 2025/26

Complete guide to Corporation Tax for property investment companies. Buy-to-let through a limited company, allowable expenses, mortgage interest relief, and CT600 filing.

ct600propertylandlordcorporation-taxbuy-to-let
23 February 2026

Best CT600 Filing Software UK 2026: Complete Comparison Guide

Comprehensive comparison of all CT600 filing software options in the UK for 2026. Features, pricing, pros and cons of every HMRC-recognised option.

comparisonct600softwareuk2026
23 February 2026

Corporation Tax Rates 2025/26: Small Company Guide (19% vs 25%)

Complete guide to Corporation Tax rates for 2025/26. How the 19% small profits rate and 25% main rate work, marginal relief explained with examples.

corporation-taxtax-ratessmall-businessmarginal-relief2025-26
23 February 2026

CT600 Box by Box Guide 2025/26: Every Box Explained

Comprehensive CT600 box-by-box guide for 2025/26. What goes in each box, common mistakes, and worked examples for every section of the Corporation Tax return.

ct600guidehmrccorporation-taxboxes
23 February 2026

UK Company Tax Return: The Complete Beginner's Guide (2025)

Everything a new limited company director needs to know about filing a company tax return (CT600) with HMRC. From registration to submission, step by step.

ct600beginnerscorporation-taxhow-tolimited-company
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