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.
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Plain-English guides to UK Corporation Tax and CT600 filing.
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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.
HMRC Business Tax Account: How to Access and Manage Your Corporation Tax Online
Complete guide to HMRC Business Tax Account for limited companies. Learn how to register, access your corporation tax records, check deadlines, view payments, and manage your CT600 obligations online.
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.
CT600 for Property Companies: Landlord Corporation Tax Guide 2026
Complete guide to filing CT600 for property investment companies. Covers rental income reporting, mortgage interest deductions, capital allowances on furnishings, property disposal gains, and step-by-step filing instructions for buy-to-let landlords.
Filing CT600 Without an Accountant: Is It Safe? A Step-by-Step Guide
Can you safely file your CT600 without an accountant? Yes for simple companies. When DIY filing is safe, when to get help, and how to do it step by step.
CT600 Box-by-Box Guide: Which Boxes Do You Actually Need to Fill In?
A plain English guide to the CT600 boxes that matter for small companies. Learn which boxes to fill in, which to skip, and how to avoid common mistakes.
Do I Need to File a CT600 If My Company Made No Profit?
Yes — even if your company made no profit, you almost certainly need to file a CT600. Learn about nil returns, dormant companies, and how to file for £59.
What Happens If You Miss the CT600 Deadline? Penalties, Interest & How to Fix It
Missed your CT600 deadline? Learn the exact HMRC penalty structure — £200 initial then 10% and a further 10% for filing dates from April 2026 — how late payment interest works at 7.75%, and the steps to fix it fast. Plus how to appeal.
Best CT600 Software for Limited Companies (2026 Comparison)
Comparing the best CT600 corporation tax software for UK limited companies in 2026. Pricing, features, and which one is right for your business.
Filing Annual Accounts at Companies House: Complete Guide for Limited Companies
Everything you need to know about filing your company's annual accounts at Companies House — deadlines, formats, micro-entity vs small company, and penalties.
First Year Corporation Tax: What New Limited Companies Need to Know
Just incorporated? Here's your complete guide to corporation tax in your first year — registration, deadlines, what to file, and how to pay.