Plain-English guides to UK Corporation Tax and CT600 filing.
HMRC charges escalating penalties for late CT600 filing, starting at £100. Here's exactly what happens, how to avoid penalties, and what to do if you've already missed the deadline.
Your dormant company still needs to file a CT600 with HMRC. Here's how to file a nil return quickly and avoid penalties — even if your company did nothing all year.
Late CT600 filing penalties explained: £100 at 1 day late, £200 at 3 months, plus interest and tax-geared penalties. How to avoid them.
Complete guide to HMRC penalties for Corporation Tax — late filing (£100 to £1,500+), late payment interest, and inaccuracy penalties. How to avoid them.
Miss your CT600 deadline and HMRC charges escalating penalties from £100 to 10% of unpaid tax. Learn the exact penalty structure, appeal options, and how to file on time.
Made an error on your CT600? Learn exactly how to amend your corporation tax return, HMRC time limits, penalties for mistakes, and how to fix common CT600 errors step by step.
Missed your CT600 deadline? Learn the exact penalty amounts (£100, £200, 10%, 20%), how interest is calculated, and the steps to fix it fast. Plus how to appeal.
HMRC's free CT600 filing service closes permanently on 31 March 2026. Here's your complete action plan — deadlines, penalties, and the cheapest alternative at £59.
Everything you need to know about filing your company's annual accounts at Companies House — deadlines, formats, micro-entity vs small company, and penalties.
When is your CT600 due? Filing deadlines, payment deadlines, and how they differ from Companies House deadlines. Avoid late penalties.
All corporation tax deadlines for 2026 — CT600 filing dates, payment due dates, and penalties for late filing. Key dates for UK limited companies.
Learn how and when to file a CT600 nil return for a dormant or non-trading company, including deadlines, penalties, and step-by-step guidance.