HMRC Enquiry Into Your Corporation Tax Return: What to Expect
What happens if HMRC opens an enquiry into your CT600. Your rights, the process, time limits, and how to respond.
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Plain-English guides to UK Corporation Tax and CT600 filing.
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How to Pay Corporation Tax: Every Payment Method Explained
All the ways to pay your Corporation Tax to HMRC — bank transfer, direct debit, online, and by post. Processing times and payment references explained.
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.
Corporation Tax Payment: Deadlines, Methods & What Happens If You're Late
When to pay Corporation Tax, how to pay HMRC, payment reference numbers, and the consequences of late payment. Complete guide for limited companies.
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.
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.
Construction Industry Scheme (CIS) & Corporation Tax: CT600 Guide
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.
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.
Dormant Company CT600: The 15-Minute Nil Return Guide (2026)
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.
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.
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.