Dormant Company Accounts & CT600: Filing Guide for Companies That Aren't Trading
How to file dormant company accounts with Companies House and a nil CT600 with HMRC. Step-by-step guide with deadlines and requirements.
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Plain-English guides to UK Corporation Tax and CT600 filing.
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Company Dissolution & Strike Off: Do You Still Need to File a CT600?
What happens to your Corporation Tax obligations when closing a limited company. Final CT600 filing, strike-off timing, and common mistakes to avoid.
HMRC Penalties for Corporation Tax: Late Filing, Late Payment & Errors
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.
New Director? Your First CT600 in 2026: The No-Jargon Guide
Just incorporated a limited company? This plain-English guide covers everything new directors need to know about filing their first CT600 in 2026.
HMRC Free CT600 Deadline March 2026: Action Plan
HMRC's free CT600 filing service closed on 31 March 2026. Here's exactly what to do if you haven't switched yet — step-by-step, no panic required.
File CT600 After HMRC Free Service Closes (2026)
HMRC's free CT600 service closed on 31 March 2026. Step-by-step guide to filing your corporation tax return from April 2026 using commercial software.
Filing Your First CT600: A Step-by-Step Guide for New Companies
Just incorporated a UK limited company? Here's everything you need to know about filing your first CT600 Corporation Tax return — from registering with HMRC to submitting your return.
CT600 Late Filing Penalties: How Much They Cost and How to Avoid Them
Miss your CT600 deadline and HMRC charges escalating penalties — from £200 on day one for filing dates from April 2026, rising to 10% of unpaid tax. Learn the full penalty structure, appeal options, and how to file on time.
HMRC Free CT600 Filing Has Closed: What Are Your Options?
HMRC withdrew its free CT600 filing service on 31 March 2026. Learn what this means for your company, your options for filing going forward, and how to switch to affordable software.
Sage CT600 Filing: Can You File Corporation Tax Through Sage?
Sage Accounting does not file CT600 returns to HMRC. Learn what Sage does for corporation tax, its limitations, and how to pair it with Taxpipe for affordable CT600 filing.
Filing a CT600 for a Short Accounting Period: Complete Guide
Need to file a CT600 for a period shorter than 12 months? Learn when short periods happen, how tax is calculated, financial year splits, and how to avoid HMRC rejection errors.
Micro-Entity Accounts: What They Are and How to File with Your CT600
Complete guide to micro-entity accounts for UK limited companies. Learn the qualifying thresholds, what to include, FRS 105 requirements, and how they work with your CT600 filing.