How to File Your CT600 Yourself in 2026 (Complete DIY Guide)
File your CT600 without an accountant in 2026. What you need, how to prepare accounts, calculate tax, and submit to HMRC.
Plain-English guides to UK Corporation Tax and CT600 filing.
File your CT600 without an accountant in 2026. What you need, how to prepare accounts, calculate tax, and submit to HMRC.
Free CT600 filing software compared. What happens when HMRC stops free filing in March 2026 and what to use instead.
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.
Find out how long HMRC takes to process your CT600 company tax return, when you'll get your tax calculation, and what to do if it's taking too long.
HMRC charges interest on late corporation tax at base rate + 2.5%. Learn current rates, how interest is calculated, and how to avoid it.
Find out whether your limited company needs to file a CT600 Corporation Tax return with HMRC. Covers dormant companies, new companies, losses, and exemptions.
Making Tax Digital is coming for corporation tax. Learn what changes to expect, likely timelines, and how to prepare your company.
How UK companies pay corporation tax on crypto. Buying, selling, mining, staking, DeFi, and NFTs — what goes on your CT600.
Company struck off or dissolved? You may still owe corporation tax. When a final CT600 is required and how to restore a company.