Accounting Periods Explained — When Does Your Corporation Tax Year Start and End?
What is an accounting period for Corporation Tax? How to work out your dates, what happens in your first year, and how periods affect your CT600 deadlines.
Plain-English guides to UK Corporation Tax and CT600 filing.
What is an accounting period for Corporation Tax? How to work out your dates, what happens in your first year, and how periods affect your CT600 deadlines.
The most frequent errors company directors make when filing their CT600. From wrong dates to missing boxes — and how to get it right first time.
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.
UK corporation tax rates for 2025/26: 19% small profits rate, 25% main rate, and how marginal relief works for profits between £50,000 and £250,000.
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.
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.