Every Corporation Tax Relief Available to UK Companies (2025/26 Complete List)
Every corporation tax relief for UK companies in 2025/26 — R&D, creative industry, patent box, capital allowances, and more.
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Plain-English guides to UK Corporation Tax and CT600 filing.
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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.
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.
Corporation Tax Calculator: How Much Will Your Company Pay in 2025/26?
Free corporation tax calculator. Understand the 19% and 25% rates, marginal relief, and how associated companies affect your bill.
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.
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.
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.
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.
R&D Tax Relief for Small Companies: What to Claim on Your CT600
R&D tax credits for SMEs: what qualifies, how to calculate the relief, and which CT600 boxes to complete. Plain English guide.
How to Register for Corporation Tax: Step-by-Step Guide for New Companies
Complete guide to registering your limited company for corporation tax with HMRC. Deadlines, what you need, UTR numbers, and what happens after registration.