Do I Need to File a CT600? When Your Company Must Submit a Tax Return
Find out whether your limited company needs to file a CT600 Corporation Tax return with HMRC. Covers dormant companies, new companies, losses, and exemptions.
Plain-English guides to UK Corporation Tax and CT600 filing.
Find out whether your limited company needs to file a CT600 Corporation Tax return with HMRC. Covers dormant companies, new companies, losses, and exemptions.
Free CT600 filing software compared. What happens when HMRC stops free filing in March 2026 and what to use instead.
How company cars affect corporation tax. Capital allowances for cars, benefit in kind rules, and CT600 treatment.
Should you incorporate? Tax comparison between sole trader and limited company at every profit level — income tax, NI, dividends.
How marginal relief works for Corporation Tax in 2025/26. Step-by-step calculation for profits between £50,000 and £250,000.
Can't afford your corporation tax bill? Learn how to set up an HMRC Time to Pay arrangement and avoid penalties.
How IR35 status affects your CT600. Practical guide for contractors filing corporation tax — inside IR35, outside IR35, or mixed.
Received an HMRC enquiry about your CT600? What triggers enquiries, your rights, what HMRC can ask, and how to respond.
New limited company timeline: when to register for corporation tax, your first accounting period, CT600 deadline, and payment date.
HMRC free CT600 filing ends 31 March 2026. Compare the best alternatives by price, features, and ease of use.
What happens to your CT600 when you change your accounting period? Guide to the rules, restrictions, and filing implications.
How to claim a corporation tax refund from HMRC. Covers overpayment, amended returns, loss carry-back, and how long refunds take.