Best Costco deals to compete with Amazon Prime Day 2025: Top sales this October

October Prime Day is this week, but you can find great deals at Costco right now.

October Prime Day (also known as Prime Big Deal Days) is two days away on Oct. 7-8, but Amazon won't be the only place to find discounts. Last year, Costco ran a Member Savings Days event during the same timeframe as October Prime Day, and we may see something similar this year. 

Also: The best October Prime Day deals live now

Costco is a membership-based wholesale retailer. While non-members can shop with a guest account online, only members can access the full savings for the store's sales events (non-members can expect a 5% markup on purchases, and some deals are members-only). Memberships start at $65 a year (and you can sometimes find membership deals through third-party sites).

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