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.
Plain-English guides to UK Corporation Tax and CT600 filing.
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.
HMRC's free CT600 filing service ends 31 March 2026. Here's exactly what to do if you've just found out — step-by-step, no panic required.
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.
Miss your CT600 deadline and HMRC charges escalating penalties from £100 to 10% of unpaid tax. Learn the exact penalty structure, appeal options, and how to file on time.
HMRC is withdrawing its free CT600 filing service on 31 March 2026. Learn what this means for your company, your options for filing after the deadline, and how to switch to affordable software before it closes.
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.
Sage Accounting does not file CT600 returns to HMRC. Learn what Sage does for corporation tax, its limitations, and how to pair it with Taxpipe for affordable CT600 filing.
Need to file a CT600 for a period shorter than 12 months? Learn when short periods happen, how tax is calculated, financial year splits, and how to avoid HMRC rejection errors.
QuickBooks does not file CT600 returns to HMRC. Learn what QuickBooks does for corporation tax, its limitations, and how to pair it with Taxpipe for affordable CT600 filing.
FreeAgent does not file CT600 returns directly to HMRC. Learn what FreeAgent does for corporation tax, its limitations, and how to pair it with Taxpipe for affordable CT600 filing.
Complete guide to claiming R&D tax credits on your CT600. Covers the merged R&D scheme, qualifying expenditure, CT600L supplementary page, HMRC compliance checks, and cash credits vs tax reduction.
Made an error on your CT600? Learn exactly how to amend your corporation tax return, HMRC time limits, penalties for mistakes, and how to fix common CT600 errors step by step.