Free tools for dormant & non-trading companies
Calculators and checkers built for dormant and non-trading company directors. No signup, no email required — just the answer you need.
Free company audit
Search your company and we’ll read its Companies House record — and its actual filed accounts — to flag overdue filings, penalty exposure, strike-off risk, and whether you’re filing the wrong thing.
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 toolMicro-entity eligibility checker
Enter three figures and we'll tell you if your company is a micro-entity, a small company, or neither.
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 or micro-entity accounts and nil CT600 from £19 a year.
Not ready to file anything yet? The free deadline watchdog emails you before your Companies House deadlines and alerts you to strike-off action — no card needed.