The obligation to submit annual accounts to Companies House applies to all limited companies, irrespective of their size. It is necessary for companies, whether they are engaged in trading activities, non-trading activities, or dormant, to submit their accounts to Companies House within 9 months after the conclusion of their financial year. The financial year typically spans 12 months and concludes on a specific date known as the 'accounting reference date' (ARD).

As for dormant companies, the deadline for submitting their accounts to Companies House generally falls 9 months after the end of the financial year. For instance, if the financial year-end is 31st December, the deadline for filing the dormant accounts would be 30th September of the following year.

You are required to file Dormant Company Accounts on an annual basis.