Your First Company Tax Return — A New Director's Guide to CT600 Filing
Just set up a limited company? Everything you need to know about your first CT600 — when it is due, what to include, and how to file.
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Plain-English guides to UK Corporation Tax and CT600 filing.
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Dormant Company CT600 Filing: Do You Still Need to File? (Yes — Here's How)
Your dormant company still needs to file a CT600 with HMRC. Learn what counts as dormant, how to file, and the fastest way to stay compliant for just £59.
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.
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.
Do I Need an Accountant to File My CT600?
Honest assessment of when you need an accountant for CT600 filing vs when you can do it yourself. Costs, complexity, and decision factors explained.
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.
CT600 Penalties: What Happens If You File Late?
Complete guide to CT600 late filing penalties and charges. How much you'll pay, when penalties apply, and how to appeal HMRC penalty decisions.
HMRC Free Filing Ended March 2026 — What You Need to Know
HMRC shut down its free CT600 filing service on 31 March 2026. Here's what changed, why it matters, and what your options are going forward.