Tax Guides
Plain-English guides on corporation tax, company accounts, and filing for UK limited company directors.
Free CT600 Filing Options After April 2026
HMRC is closing its free online CT600 service. Here are the best alternatives for UK limited companies.
Micro-Entity Accounts: A Plain-English Guide
Who qualifies, what to include, and how to file micro-entity accounts under FRS 105.
UK Corporation Tax Rates and Calculator (2025/26)
Understand the 19% and 25% rates, marginal relief, and how to calculate your tax bill.
Dormant Company CT600: Do You Still Need to File?
Find out if your dormant company needs a CT600, how to file a nil return, and when you can claim dormant status.
CT600 vs SA100: Which Tax Return Do You Need?
Company tax return or personal tax return? Often both. Here is when each applies.
Filing Your First CT600: A New Company Guide
Just incorporated? Step-by-step guide from registering for corporation tax to submitting your first return.