Most Costco members have received the monthly coupon book in their mailbox. Most have glanced at it, found a few things interesting, and then gone to the warehouse without it. A smaller, more commercially savvy group of members treats it as the planning document it was designed to be — and the financial difference between those two approaches compounds into hundreds of dollars per year. Costco officially calls it the Member-Only Savings booklet. Most members call it the coupo

The Costco coupon book strategy 2026 — formally titled the Member-Only Savings booklet and arriving in members' mailboxes approximately once per month with valid savings windows of 28 days — is one of the most commercially underappreciated dimensions of the Costco member experience. Most brands that study the Costco channel focus intensely on membership fees, buyer evaluation criteria, roadshow execution, and digital strategy. Far fewer have analyzed what the monthly coupon b