When you calculate the size of your business to determine if you are a small business, you must include the annual receipts and the employees of your affiliates. Affiliation is determined by the ability to control. When the ability to control exists, even if it is not exercised, affiliation exists. The SBA determines affiliation in accordance with 13 CFR 121.103 in its Small Business Size Regulations. Be sure to read the SBA's affiliation discussion as well.