The Costco Policy That Has You Covered When You Miss A Sale - Tasting Table
Briefly

Costco's price adjustment policy ensures that if you find a lower price within 30 days of purchase, you're eligible for a refund of the difference.
If you purchased online, simply submit a request from your member account to receive your price difference back with minimal hassle.
In-store purchases can be trickier, as not all locations may offer refunds for price drops; visiting the membership counter with your receipt is necessary.
With rising living costs, Costco helps consumers save on essentials through bulk purchasing and easy online ordering without worrying about sales timing.
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