- Free shipping
- Costco states shipping on most items is included on Costco.com. For CostcoGrocery 2-Day Delivery, there is no separate delivery fee with orders of $75 or more before taxes.
- Returns
- Costco offers a 100% Satisfaction Guarantee refunding most merchandise, but electronics must be returned within 90 days. Costco covers return shipping for online orders, while in-store items must be brought to a warehouse counter.
- Student discount
- Costco lists College Students as eligible for a membership offer with a link to verify through UNiDAYS on its membership page.
- Codes stack?
- For PODS storage, each offer cannot be combined with any other offer. Instacart credits are limited to one credit per order for Executive Members.
- Best month to buy
- November — about 77% of Costco's biggest discounts of the year fall in it, by our estimate.
- Payment
- Costco warehouses accept Visa, debit, cash, checks, EBT, and Shop Cards; online it also accepts MasterCard and Affirm. The Costco Anywhere Visa offers Citi Flex Plans with APR 18.99%–26.99% and monthly fees up to 1.72%, while Shop Cards range from $25 to $2,000.
- Customer service
- Costco provides phone and chat for online orders at 1-800-955-2292, operating 5am to 8pm Pacific Time weekdays and 5am to 7pm weekends. Membership and warehouse inquiries use 1-800-774-2678, with phone hours 6am to 6pm Pacific Time weekdays and 8am to 5pm weekends.