UK Company Tax Return: The Complete Beginner's Guide (2025)
Everything a new limited company director needs to know about filing a company tax return (CT600) with HMRC. From registration to submission, step by step.
Plain-English guides to UK Corporation Tax and CT600 filing.
Everything a new limited company director needs to know about filing a company tax return (CT600) with HMRC. From registration to submission, step by step.
When to pay Corporation Tax, how to pay HMRC, payment reference numbers, and the consequences of late payment. Complete guide for limited companies.
Detailed guide to every box in the CT600 income section. What goes where — turnover, trading profits, property income, chargeable gains, and total profits.
Guide to filing your Companies House confirmation statement — what it is, when it's due, what information you need, and the difference from annual accounts.
How to file dormant company accounts with Companies House and a nil CT600 with HMRC. Step-by-step guide with deadlines and requirements.
Complete guide to HMRC penalties for Corporation Tax — late filing (from £100 fixed, rising to £200 for deadlines from April 2026, plus up to 20% of unpaid tax), late payment interest, and inaccuracy penalties. How to avoid them.
How CIS deductions work for limited companies, how to reclaim CIS through payroll and HMRC's repayment service, and how Corporation Tax is calculated on construction profits.
Guide to claiming creative industry tax reliefs on your CT600 — film, TV, video games, animation, theatre, orchestra, and museums.
Complete guide to claiming trading loss relief on your CT600 — carry back, carry forward, group relief, and terminal loss relief explained with examples.
How limited companies report capital gains on the CT600, including indexation allowance, the substantial shareholding exemption, and which boxes to complete.
Got a dormant company? You still need to file a CT600. This 2026 guide shows you how to file a nil return in 15 minutes — even without HMRC's free service.
Just incorporated a limited company? This plain-English guide covers everything new directors need to know about filing their first CT600 in 2026.