iXBRL Tagging for Company Accounts and CT600: What You Need to Know
How iXBRL tagging works for CT600 filing — what gets tagged, HMRC requirements, common tagging errors, and how to generate iXBRL accounts without specialist software.
Blog
Plain-English guides to UK Corporation Tax and CT600 filing.
182 results for “CT600”Clear search
How Are Dividends Taxed for Corporation Tax? A Complete Guide
How dividends interact with Corporation Tax — paying dividends, receiving dividends, the dividend exemption, franked investment income, and CT600 reporting for UK companies.
Capital Allowances and Corporation Tax: How to Claim Tax Relief on Business Assets
How to claim capital allowances on your CT600 — AIA, writing down allowances, full expensing, first-year allowances, and which assets qualify for Corporation Tax relief.
Corporation Tax Deadlines 2026: When You Need to File and Pay
All corporation tax deadlines for 2026 — CT600 filing dates, payment due dates, and penalties for late filing. Key dates for UK limited companies.
Do I Need an Accountant for Corporation Tax? When DIY Makes Sense
Find out whether you need an accountant for corporation tax or can file your CT600 yourself. Honest guide for UK limited company directors.
The Cheapest Way to File Your CT600 in the UK (2026)
Compare every option for filing your CT600 — from accountants to DIY software — ranked by cost. Find the cheapest way to file your company tax return.
Taxfiler vs Taxpipe: How They Compared (Taxfiler Now Discontinued)
Taxfiler was discontinued in March 2025. See how the two CT600 tools compared on price, features, and ease of use — and why Taxpipe is the natural replacement for directors filing their own returns.
Small Company Corporation Tax Rates 2025/2026: Complete Guide
Understand corporation tax rates for small companies in 2025/2026, including the 19% and 25% thresholds, marginal relief calculation, and associated companies rules.
First Year Corporation Tax: A Complete Guide for New Companies
New limited company? Learn when to register for corporation tax, your first accounting period, filing deadlines, and how to avoid common first-year mistakes.
Director's Loan Account and Corporation Tax: What You Need to Know
Understand how a director's loan account affects your corporation tax, including the S455 charge at 33.75%, repayment rules, and CT600 reporting.
Corporation Tax Refund: How to Get Money Back If You Overpaid HMRC
Overpaid corporation tax? Learn how to claim a refund from HMRC, amend your CT600, and understand timelines for getting your money back.
CT600 Nil Return: How to File When Your Company Has No Trading Activity
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.