How to determine the size of a company There are four sizes of company to consider when preparing and filing accounts and reports in accordance with the Companies Act 2006 (CA 2006) - micro-entity, small, medium-sized and large. The size of a company is determined by thresholds for turnover, balance sheet total (meaning the total of the fixed and current assets) and the average number of employees. In addition, qualitative factors are taken into consideration. For example, public companies and certain financial services companies cannot qualify as micro-entities, small, or medium-sized companies. There are also restrictions in certain group situations, for example, when a company is part of an ‘ineligible group’.