Unless you're going shopping alongside a member, you typically need your own paid annual membership, a basic version of which costs $60. Costco also offers a Gold Star Executive Membership that costs $120 a year and offers a 2 percent cashback reward up to $1,000.
Is a membership worth it? Generally, it would be, if you spend at least $600 a year there, Joanie Demer, co-founder of The Krazy Coupon Lady, tells CNBC Make It. Other experts suggest that it could make sense if you have kids, pets, prescriptions and/or a car.
Or consider trying out these hacks that could help you skip the membership and still some save money.