Core Insights - Costco operates a unique business model that requires customers to pay a membership fee for access, which significantly impacts its revenue structure and customer loyalty [1][3] - The membership renewal rate is a critical metric for Costco, typically around 90%, providing a stable annuity-like income stream [4][8] - Despite generating approximately $63.2 billion in total revenue in the fiscal third quarter of 2025, only about $1.2 billion, or less than 2%, came from membership fees [5] Revenue and Cost Structure - Membership fees contribute significantly to Costco's gross profit, accounting for around half of it, despite being a small portion of total revenue [8] - The cost of goods sold in the same quarter was nearly $55 billion, with additional operational costs of approximately $5.7 billion, leading to a gross profit of about $2.5 billion [7] - Membership fees have minimal associated costs, allowing them to flow directly into gross profit, enhancing the overall profitability of the company [6][8] Business Strategy and Customer Focus - Costco's membership model allows for lower margins on product sales, which helps maintain customer satisfaction and loyalty [9] - The company emphasizes strong employee relations to ensure high levels of customer service, reinforcing its focus on customer happiness as a means to drive membership renewals [10]