Active capital refers to the financial resources of a business that are actively invested or used in various business activities. There are several synonyms for this term, including working capital, operating capital, circulatory capital, and current capital. Working capital refers to the amount of cash and other assets that a business has available to fund its day-to-day operations. Operating capital can be used interchangeably with working capital, and both terms are commonly used in financial reporting. Circulatory capital refers to the amount of cash that is constantly flowing through a business, used to purchase inventory and pay bills. Current capital is a more general term referring to all of a business's short-term financial resources, including working capital, cash reserves, and accounts receivable.