CTM03580 - Corporation Tax: small companies: associated company: rules for determining

In determining whether a company has an associated company or how many associated companies a company has during its accounting period - you should apply the instructions in CTM03710 onwards.

• An associated company is counted even if it is an associated company for part only of an accounting period (but see CTM03640).
• Two or more associated companies are counted even if they are associated companies for different parts of the accounting period.
• An associated company which has not carried on any trade or business (see CTM03590) at any time during that accounting period (or, if it is an associated company for part only of that accounting period, at any time during that part of that accounting period) is to be disregarded.