Corporation Tax on Rental Income: CT600 Guide
How is rental income taxed in a limited company? Learn how property income works on your CT600, allowable deductions, and when a property company makes sense.
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Plain-English guides to UK Corporation Tax and CT600 filing.
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Company Losses: Trading vs Non-Trading on CT600
Trading losses, non-trading deficits, capital losses — learn the different types of company loss, how each is relieved, and where they go on your CT600.
HMRC Penalties for Late Corporation Tax Filing
What are the penalties for filing your CT600 late? Understand HMRC penalty rates, interest charges, and how to avoid or appeal late filing penalties.
Employer NIC: Corporation Tax Deduction Guide
Is employer NIC an allowable deduction for corporation tax? Yes. Learn how employer National Insurance works, current rates, the Employment Allowance, and how to claim on your CT600.
Corporation Tax on Overseas Income: Guide
How UK companies pay corporation tax on overseas income. Covers foreign trading profits, dividends, rental income, double taxation relief, and CT600 reporting.
Company Formation & Corporation Tax Registration
Step-by-step guide to registering for Corporation Tax after forming a limited company. Covers CT41G, UTR numbers, deadlines, and first CT600 filing.
Corporation Tax Marginal Relief Explained
How does marginal relief work for UK corporation tax? Plain-English explanation of the 19%-25% band, the formula, worked examples, and how to claim on your CT600.
Flat Rate VAT Scheme & Corporation Tax
How the Flat Rate VAT Scheme affects your corporation tax. Learn about the VAT surplus, how to report it on your CT600, and whether the scheme still saves money.
Company Tax Return (CT600) vs Annual Accounts: What's the Difference?
CT600 vs annual accounts: one goes to HMRC, one to Companies House. What each is, when they are due, and how they relate.
How to Appeal a CT600 Late Filing Penalty from HMRC
Got a CT600 late filing penalty? You may be able to appeal. Step-by-step guide to HMRC penalty appeals, reasonable excuses, and time limits.
How to File Your CT600 Yourself in 2026 (Complete DIY Guide)
File your CT600 without an accountant in 2026. What you need, how to prepare accounts, calculate tax, and submit to HMRC.
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.