The Costco member renewal guide 2026 question comes down to one number: how much you spend at Costco in a year on things the Executive reward actually counts. Most people renew on autopilot, and a lot of Gold Star members have never run the math on upgrading. Today is October 22, 2026, a good moment to do it, because you can look back over a year of receipts and the holiday spending season is about to push your numbers up. This guide gives you the simple formula, three worked