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

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19 February 2026

How to Pay Corporation Tax to HMRC — All Payment Methods Explained

Step-by-step guide to paying your Corporation Tax bill. Bank details, payment references, deadlines, and what happens if you pay late.

corporation taxHMRCpaymenttax paymentdeadlines
12 February 2026

How to File a CT600 Online — Step by Step Guide

Learn how to file your CT600 corporation tax return online step by step. Plain English guide covering deadlines, common mistakes and what you need to start.

CT600GuideFiling
12 February 2026

CT600 Deadline: When Is Your Company Tax Return Due?

When is your CT600 due? Your company tax return deadline is 12 months after the accounting period ends. Late filing means automatic penalties.

CT600Deadlines
12 February 2026

Corporation Tax Rates 2025/26 - Marginal Relief Calculator

Current UK corporation tax rates and marginal relief.

Corporation TaxTax Rates
12 February 2026

What Records Do I Need for My Company Tax Return?

Complete checklist of records and documents needed for CT600 filing. How long to keep them, what HMRC expects, and how to organize everything.

ct600record keepingdocumentsHMRC requirements
11 February 2026

What Is a CT600? The Plain English Guide for Company Directors

A jargon-free explanation of the CT600 Corporation Tax return — what it is, who needs to file one, what goes in it, and how to submit it to HMRC.

ct600corporation taxbeginners
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