Company Struck Off or Dissolved? You May Still Need to File a CT600
Company struck off or dissolved? You may still owe corporation tax. When a final CT600 is required and how to restore a company.
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Plain-English guides to UK Corporation Tax and CT600 filing.
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Corporation Tax for Startups: The Complete Guide for New Limited Companies
Corporation tax for startups. Registration, deadlines, expenses, R&D relief, first CT600 filing, and mistakes to avoid.
Corporation Tax on Cryptocurrency: How to Report Bitcoin & Crypto on Your CT600
How UK companies pay corporation tax on crypto. Buying, selling, mining, staking, DeFi, and NFTs — what goes on your CT600.
Corporation Tax Refund: How to Claim Back Overpaid Tax from HMRC
How to claim a corporation tax refund from HMRC. Covers overpayment, amended returns, loss carry-back, and how long refunds take.
Just Incorporated? Your First CT600 Timeline: Key Dates You Can't Miss
New limited company timeline: when to register for corporation tax, your first accounting period, CT600 deadline, and payment date.
Do I Need to File a CT600? When Your Company Must Submit a Tax Return
Find out whether your limited company needs to file a CT600 Corporation Tax return with HMRC. Covers dormant companies, new companies, losses, and exemptions.
Free CT600 Filing Software: What Are Your Options in 2026?
Free CT600 filing software compared. HMRC's free filing service closed in March 2026 — here's what it offered and what to use instead.
Non-UK Company Trading in the UK? When You Need to Pay Corporation Tax
Non-UK company with UK activities? When you must register for corporation tax, file a CT600, and what counts as a permanent establishment.
How to File a Nil CT600 Return for a Dormant Company
Step-by-step guide to filing a nil Corporation Tax return for your dormant limited company. Avoid penalties — even dormant companies must file with HMRC.
iXBRL Accounts: What Are They and Why You Need Them for Your CT600
What iXBRL accounts are, why HMRC requires them with your CT600, and how to generate them without expensive software. Plain English guide for company directors.
HMRC Corporation Tax Online Account: How to Set Up and Use It
Step-by-step guide to setting up your HMRC Corporation Tax online account. Register, activate, and manage your company tax — including how to file your CT600.
Corporation Tax for Freelancers: A Complete Guide for Limited Company Contractors
Corporation tax guide for freelancers with a limited company. Covers allowable expenses, IR35, dividends, and filing your CT600.