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Plain-English guides to UK Corporation Tax and CT600 filing.

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23 February 2026

Capital Allowances on Your CT600 — AIA, WDA, and Full Expensing Explained

How to claim capital allowances on your CT600 for equipment, vehicles, and machinery. Covers AIA, writing down allowances, full expensing, and which CT600 boxes to use.

capital-allowancesct600aiacorporation-taxtax-relief
23 February 2026

Annual Investment Allowance (AIA): Claim £1M Tax Relief on Your CT600

How to claim Annual Investment Allowance on your CT600. £1 million limit, qualifying assets, how to calculate, and common mistakes.

ct600capital-allowancesaiatax-relief
23 February 2026

Creative Industry Tax Relief: Film, TV, Video Games & More on Your CT600

Guide to claiming creative industry tax reliefs on your CT600 — film, TV, video games, animation, theatre, orchestra, and museums.

ct600creative-industrytax-reliefcorporation-tax
23 February 2026

Patent Box: Pay Just 10% Corporation Tax on Patent Profits

How the Patent Box regime lets UK companies pay only 10% Corporation Tax on profits from patented inventions. Eligibility, calculation, and CT600 reporting.

ct600patent-boxcorporation-taxtax-relief
23 February 2026

Trading Losses & Corporation Tax: How to Claim Relief on Your CT600

Complete guide to claiming trading loss relief on your CT600 — carry back, carry forward, group relief, and terminal loss relief explained with examples.

ct600lossescorporation-taxtax-relief