CT600 for Contractors: Filing When You're Inside or Outside IR35
How IR35 status affects your CT600. Practical guide for contractors filing corporation tax — inside IR35, outside IR35, or mixed.
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Plain-English guides to UK Corporation Tax and CT600 filing.
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Company Cars & Corporation Tax: Capital Allowances, BIK, and CT600 Treatment
How company cars affect corporation tax. Capital allowances for cars, benefit in kind rules, and CT600 treatment.
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 Long Does HMRC Take to Process a CT600? Processing Times Explained
Find out how long HMRC takes to process your CT600 company tax return, when you'll get your tax calculation, and what to do if it's taking too long.
CT600 vs Self Assessment: What's the Difference? (Company vs Personal Tax)
CT600 vs Self Assessment: the key differences between company tax returns and personal tax returns. Who files which and why.
CT600 Supplementary Pages Explained: Which Ones Does Your Company Need?
CT600 supplementary pages explained: CT600A through CT600P. Find out which ones your company needs and how to complete them.
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.
Corporation Tax Penalties & Interest Charges
Understand HMRC corporation tax penalties for late filing and payment, how interest is calculated, and how to appeal. Complete guide for UK company directors.
Corporation Tax Record Keeping Requirements
What records your UK company must keep for corporation tax. Covers retention periods, digital records, HMRC inspection powers, and penalties for poor record keeping.