Free tools for UK dormant companies
Calculators and checkers built for dormant company directors. No signup, no email required — just the answer you need.
Late filing penalty calculator
Already overdue? Enter your days late and we’ll show the exact penalty band you fall into.
Open toolDormant company deadline calculator
Find your next three filing deadlines and download them as a calendar feed.
Open toolAm I dormant? checker
Answer 8 questions to find out if your company is dormant for HMRC, Companies House, both, or neither.
Open toolCompanies House public-record audit
Enter a company number and get a free health report — overdue filings, strike-off risk, and more.
Open toolDo I owe a CT600? checker
Not sure if you owe a Corporation Tax return? Answer 7 questions and we'll tell you exactly which CT600 you need.
Open toolWhy we built these
Most dormant company owners only think about their company once a year — and usually only when they receive a reminder or a penalty notice. These free tools answer the questions we hear most often, without forcing you to sign up for anything.
When you’re ready to file, DormantFile takes care of your dormant accounts and nil CT600 from £19 a year.