Savvy Costco shoppers employ various strategies to maximize their savings. One key hack involves deciphering price tags: items ending in $.97 indicate clearance and significant markdowns, while an asterisk in the corner signifies a discontinued product, often leading to deep discounts. Members also keep an eye out for "Monday Markdowns" for clearance items and monthly sales, including online-only deals, to stock up.

Another significant money-saving tactic is understanding the value of a Costco membership. While the Gold Star membership costs $60 annually, the Executive membership, at $120 per year, offers a 2% reward on eligible pre-tax purchases, up to $1,000. This reward can effectively pay for the executive membership if a shopper spends around $250 monthly. Additionally, shoppers are advised to purchase discounted gift cards for restaurants, retailers, and entertainment, which can offer savings of $15 to $50 off face value.

Smart shopping extends to product choices. While bulk buys often present good deals, consumers are cautioned to consider the perishability of items like produce and baked goods to avoid waste. Shoppers are also encouraged to check unit prices and not assume all Costco items are inherently cheaper than sales at other big-box stores. The Kirkland Signature store brand is highly recommended, as it often matches or exceeds the quality of name-brand products, sometimes being re-labeled versions of popular brands.

Furthermore, Costco offers several perks that contribute to savings. Its famously generous return policy allows most items to be returned at any time, even without a receipt, using a membership card. The price adjustment policy is also beneficial; if an item's price drops within 30 days of purchase, Costco will refund the difference. Other tips include filling up at Costco gas stations, which are typically $0.05 to $0.25 cheaper per gallon, and using the Costco app to monitor inventory, gas prices, and online-only deals.