Reach a human · Supermarkets
Talk to a person at Costco UK
Membership, online orders and returns.
Standard UK landline rate, included in most mobile minutes
01923 830 477
! Number not yet checked on the official website
Hours and numbers
Opening hoursCheck costco.co.uk for current hours.
Fastest route to a person
- Have your order number and the email you ordered with ready
- Pick the option for an existing order, then say “adviser” if a voice assistant answers
- For a refund or replacement, ask for a reference number before you hang up
Menu shortcuts change often. Tell us if one stops working.
Quietest time to call
Weekday mid-morning or after 7pm
Busiest, avoid if you can
Monday mornings and the week before Christmas
Monday mornings and the week before Christmas
Other ways in
Online helpcostco.co.uk
In storeMany returns are quicker at a store till with your receipt or order email
Not sorted? Complain
Complain to the retailer under the Consumer Rights Act. If you paid by card, ask your bank for a chargeback, or use Section 75 on a credit card for items over £100.
Sort it out
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Last checked 2026-11-06