Corporation Tax for Property Companies: A Complete Landlord Guide
Corporation tax for property companies. Mortgage interest relief, capital gains, allowable expenses, and filing your CT600.
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Plain-English guides to UK Corporation Tax and CT600 filing.
How to Reduce Corporation Tax Legally: 12 Strategies for UK Companies
Discover 12 legal ways to reduce your corporation tax bill. From capital allowances to pension contributions, learn how to minimise what your company pays HMRC.
Associated Companies — How They Affect Your Corporation Tax Rate
How associated companies change your Corporation Tax thresholds. What counts, what doesn't, dormant company exemption, and how to report them on your CT600.
Best CT600 Filing Software UK 2026 — Compared
HMRC's free filing tool closes March 2026. Compare the best CT600 filing software options — prices, features, and which one suits your company.
CT600 Filing Checklist — Everything You Need Before You Start
Complete checklist of every document, figure, and detail you need to file your Corporation Tax return. Print it, tick it off, file in 15 minutes.
How to File Your CT600 Without an Accountant — Complete Guide
Step-by-step guide to filing your CT600 without an accountant. What you need, how to calculate tax, and how to avoid mistakes.
Closing a Limited Company — Your Final CT600 and What to Do
Step-by-step guide to closing your limited company. Final CT600, capital distributions, strike-off vs MVL, and the mistakes that cost directors money.
Corporation Tax Payment Reference — How to Pay HMRC Correctly
How to find and use your Corporation Tax payment reference, HMRC bank details, payment methods, and what to do if you use the wrong reference.
Annual Investment Allowance (AIA): Claim Up to £1 Million in Tax Relief
How to claim AIA on your CT600 for plant and machinery purchases. What qualifies, what doesn't, and common mistakes that cost small companies money.
Dividends vs Salary: The Tax-Efficient Way to Pay Yourself
How to optimise your salary and dividends mix as a limited company director. Save thousands in tax with the right strategy — and how it affects your CT600.
What Happens If You Don't File Corporation Tax? Penalties, Interest, and How to Fix It
Missed your CT600 deadline? Learn about HMRC late filing penalties (fixed penalties escalating to 10% tax surcharges), interest charges, how to appeal, and the fastest way to get back on track.
Corporation Tax for Contractors: IR35 and Your CT600
How IR35 affects your Corporation Tax return. Inside vs outside IR35, deemed payments, and guidance for contractor companies.