Contact Costco by Phone: Step-by-Step Guide

Kayla Jul 09, 2026

If you're a Costco member or simply interested in their products and services, you might find yourself needing to contact Costco by phone. Whether you have a question about a product, need assistance with your membership, or want to provide feedback, Costco offers several phone numbers to help you get in touch. Let's explore how to contact Costco by phone.

Costco Is Rolling Out a Big Change to Its App—And Shoppers Are EXCITED!
Costco Is Rolling Out a Big Change to Its App—And Shoppers Are EXCITED!

Before we dive into the specific phone numbers, it's important to note that Costco's customer service operates during specific hours. Typically, their phone lines are open from 9:00 AM to 5:00 PM, Monday through Friday, with extended hours on certain holidays. However, it's always a good idea to check their website or contact them directly for the most up-to-date information.

Costco LOVE.  ・Live Your Story with Stacy Julian
Costco LOVE. ・Live Your Story with Stacy Julian

Contacting Costco's Customer Service

For general inquiries, product information, or assistance with your membership, you can reach out to Costco's customer service department.

the checkout app is open and ready to be used by customers on their cell phone
the checkout app is open and ready to be used by customers on their cell phone

Costco's main customer service phone number is:

Main Customer Service Line

Costco Australia members are making the same error with the digital card. Here is the fix
Costco Australia members are making the same error with the digital card. Here is the fix

1-800-774-2678

This number is toll-free and can be used by both members and non-members. When you call, you'll be connected to an automated system that will guide you through various options to help you find the information you need. If you prefer to speak to a representative, you can press '0' at any time during the call.

Membership Services

Costco Just Outlined These 6 Changes to Its Mobile App
Costco Just Outlined These 6 Changes to Its Mobile App

If you have specific questions about your Costco membership, such as renewals, upgrades, or adding additional cardholders, you can contact their membership services department.

Membership services phone number is:

1-800-774-2678

the coup page for costco next, the members only portal most shoppers miss
the coup page for costco next, the members only portal most shoppers miss

When you call, simply select the option for membership services from the automated menu.

Contacting Costco's Business Services

Yuck! Costco Offering A Refund On This Product Due To It's 'Weird Taste'
Yuck! Costco Offering A Refund On This Product Due To It's 'Weird Taste'
an iphone screenshot shows the order information for food items and other items on sale
an iphone screenshot shows the order information for food items and other items on sale
Michelle on Instagram: "Your Costco membership costs $65 a year. Sam's Club costs $60. And somehow Costco members still walk out of that warehouse leaving money on the table every single time.  I worked the Costco floor for almost 5 years. I watched people renew without asking a single question. The playbook was simple: process the card, don't explain the benefits, let them figure it out on their own.  Here's what your membership actually includes that nobody bothered to tell you:  1️⃣ Costco pharmacy fills pet prescriptions at member pricing. Your dog's heartworm meds, your cat's thyroid pills, same member discount. Vets charge 2–3x more for the exact same medication.  2️⃣ Free hearing tests at the Costco Hearing Aid Center. No purchase required. Most people walk right past it thinking it Walk Out, Costco Membership, Hearing Aids, Pharmacy, Figure It Out, Things To Think About, Medical, Let It Be
Michelle on Instagram: "Your Costco membership costs $65 a year. Sam's Club costs $60. And somehow Costco members still walk out of that warehouse leaving money on the table every single time. I worked the Costco floor for almost 5 years. I watched people renew without asking a single question. The playbook was simple: process the card, don't explain the benefits, let them figure it out on their own. Here's what your membership actually includes that nobody bothered to tell you: 1️⃣ Costco pharmacy fills pet prescriptions at member pricing. Your dog's heartworm meds, your cat's thyroid pills, same member discount. Vets charge 2–3x more for the exact same medication. 2️⃣ Free hearing tests at the Costco Hearing Aid Center. No purchase required. Most people walk right past it thinking it Walk Out, Costco Membership, Hearing Aids, Pharmacy, Figure It Out, Things To Think About, Medical, Let It Be
a shopping cart with the words 17 ways to get a costco member for free
a shopping cart with the words 17 ways to get a costco member for free
an iphone screen showing the order form and delivery details for orders from other stores, as well as instructions on how to delete them
an iphone screen showing the order form and delivery details for orders from other stores, as well as instructions on how to delete them
What Is Costco Next? Here’s How It Works - The Krazy Coupon Lady
What Is Costco Next? Here’s How It Works - The Krazy Coupon Lady
an iphone screen showing the order information for clothing and shoes
an iphone screen showing the order information for clothing and shoes
a man giving the thumbs up sign in front of a costco store with text that reads secret ideas at costco to save you money
a man giving the thumbs up sign in front of a costco store with text that reads secret ideas at costco to save you money
What Is Shipt? A Grocery Delivery Service Review
What Is Shipt? A Grocery Delivery Service Review
an iphone screen showing the app for shopping
an iphone screen showing the app for shopping
Sorry Costco, we're breaking up 💔👋 lol I just dont go there enough and buying in bulk for one person is insane. Its definetly worth it if you have a big family - had a good experience with the tire service though, discount flight gift card, and cheap food court. I went grocery shopping a few times and bought a few clothing peices- got my money's worth, would recommend. Nice of them to refund $70 annual fee automatically in credit Avoid Processed Foods, Food Court, Insulin Resistance, What You Eat, Cheap Meals, Big Family, Lean Protein, Grocery Shop, Processed Food
Sorry Costco, we're breaking up 💔👋 lol I just dont go there enough and buying in bulk for one person is insane. Its definetly worth it if you have a big family - had a good experience with the tire service though, discount flight gift card, and cheap food court. I went grocery shopping a few times and bought a few clothing peices- got my money's worth, would recommend. Nice of them to refund $70 annual fee automatically in credit Avoid Processed Foods, Food Court, Insulin Resistance, What You Eat, Cheap Meals, Big Family, Lean Protein, Grocery Shop, Processed Food
the costco flyer is open and shows items for sale on it's side
the costco flyer is open and shows items for sale on it's side
Costco Just Changed the Game for Us at Disney World Hotels - AllEars.Net
Costco Just Changed the Game for Us at Disney World Hotels - AllEars.Net
How to Get a Costco Membership for Free or Really Cheap
How to Get a Costco Membership for Free or Really Cheap
an iphone screen showing the delivery process for amazon's new store, which is open to
an iphone screen showing the delivery process for amazon's new store, which is open to
how do i contact costco by phone
how do i contact costco by phone
a man in red shirt holding a box with the words 22 costo secrets you're missing
a man in red shirt holding a box with the words 22 costo secrets you're missing
how do i contact costco by phone
how do i contact costco by phone
Costco Return Policy: Insider Tips For A Hassle-Free Return
Costco Return Policy: Insider Tips For A Hassle-Free Return
The REAL Reason Why Costco Implemented Door Scanners!
The REAL Reason Why Costco Implemented Door Scanners!

If you're a business owner or representative interested in Costco's business services, you can reach out to their dedicated business services team.

Business services phone number is:

Business Services Line

1-800-774-2678

When you call, select the option for business services from the automated menu. This line is available Monday through Friday, from 8:00 AM to 5:00 PM, in your local time zone.

Business Services Fax

If you prefer to send a fax, you can reach Costco's business services department at:

1-909-461-5360

This fax line is available 24 hours a day, 7 days a week.

In conclusion, whether you're a Costco member or simply have a question about their products or services, there are several phone numbers you can use to contact Costco. By keeping these numbers handy, you'll be well-equipped to get the assistance you need. Happy shopping!