You can sign up for a Costco membership on their website in about five minutes using a credit card and a valid email address
Costco memberships are sold only through Costco itself — not through third parties or discount sites. The online signup process takes you through Costco's website directly, where you choose your membership level, enter your payment information, and receive your membership number when ready. You do not need to visit a warehouse to start shopping online, though you will need to pick one as your home warehouse during signup.
The entire process happens on costco.com. You will need a valid credit card (Visa, Mastercard, American Express, or Discover), your email address, and a mailing address. If you are renewing an existing membership, you can also renew online using the same steps.
Key Takeaways
- Go to costco.com, click "Sign Up" in the top right, and choose between Gold Star (standard) or Executive membership based on your expected spending.
- You will enter your name, email, mailing address, and phone number, then select a home warehouse location.
- Payment is processed when ready with a credit card, and your membership number appears on screen and in your email within minutes.
- Your membership is active right away for online shopping, though some warehouse services may require an in-person visit to set up.
- Costco memberships renew automatically on your membership anniversary unless you cancel, so mark your renewal date in your calendar.
Step-by-step: signing up on costco.com
Start by opening costco.com in your web browser. In the top right corner of the page, you will see a "Sign Up" button. Click it to begin. Costco will ask you to choose between two membership types: Gold Star (the standard membership) or Executive (a higher tier with additional benefits and a higher annual cost). Most people start with Gold Star unless they plan to spend more than a certain amount per year — Costco's website shows the break-even point for Executive membership based on your expected purchases.
After you choose your membership level, you will enter your personal information: first and last name, email address, phone number, and mailing address. This address does not have to be near your home warehouse, but Costco uses it to verify your identity and send renewal notices. Next, you will select your home warehouse from a dropdown list. This warehouse is where you can pick up online orders and is the location Costco associates with your account, but you can shop at any Costco warehouse with your membership card.
You will then enter your credit card information. Costco accepts Visa, Mastercard, American Express, and Discover. The charge appears on your statement as "Costco Wholesale" and posts within one to three business days. Once you submit your payment, your membership number generates when ready and appears on the screen. Costco also sends a confirmation email with your membership number, which you can use to shop online right away.
What happens after you complete signup
Your membership is active for online shopping the moment you finish signup. You can log in to costco.com using your email address and the password you created, then begin browsing and placing orders. Your membership number will be in your account under "Membership" or "My Account," and you can view it anytime you log in.
If you want to shop in a physical warehouse, you have two options: you can print your membership card from your Costco account online, or you can visit your home warehouse and ask for a physical card at the membership desk. Some warehouses will issue a card on the spot; others may ask you to show ID to verify your identity. You do not need to wait for a card to arrive in the mail — the membership is valid when ready.
Your membership renews automatically one year from the date you sign up. Costco will send you an email reminder about 30 days before your renewal date. If you want to cancel before renewal, you can do so through your online account or by calling Costco's membership services line. If you cancel before your renewal date, Costco offers a prorated refund for the unused portion of your membership.
Membership levels and what they cost
Costco offers two main membership tiers. Gold Star membership is the standard option and costs a set annual fee (the exact amount varies by region and changes periodically). This membership includes access to all Costco warehouses, online shopping, and the ability to bring a household member with you to shop.
Executive membership costs more per year but includes additional benefits: a 2% reward on most Costco purchases (paid as an annual certificate), extra discounts on Costco services like gas and pharmacy, and higher return limits on some items. Costco's website shows the annual cost of each membership level in your region before you sign up, so you can compare them side by side.
If you are not sure which level is right for you, start with Gold Star. You can upgrade to Executive anytime during your membership year by paying the difference, and Costco will credit the unused portion of your Gold Star fee toward the upgrade.
What you need before you start
Have these items ready before you begin signup: a valid credit card (Visa, Mastercard, American Express, or Discover), your email address, your mailing address, and your phone number. You will also need to know which Costco warehouse you want to set as your home warehouse — you can search by zip code on costco.com to find nearby locations.
If you are signing up as a household member under someone else's membership, that primary member must set you up through their account. Costco allows one free household member (usually a spouse or adult living at the same address) to be added to a membership. The primary member can add or change the household member through their online account settings.
Troubleshooting common signup problems
If your credit card is declined, check that you entered the card number, expiration date, and security code correctly. Some banks flag online purchases as suspicious, so contact your bank to confirm the charge is legitimate, then try again. If the problem continues, try a different card or contact Costco's membership services line for help.
If you do not receive a confirmation email, check your spam or junk folder — sometimes confirmation emails are filtered there. If you still cannot find it, log into your Costco account on the website and look for your membership number under "My Account" or "Membership." If you cannot log in, use the "Forgot Password" link on the login page to reset your password using your email address.
If you are having trouble selecting a home warehouse, make sure you are entering your zip code correctly in the search box. If no warehouses appear, you may be in an area without a nearby Costco location. In that case, you can still purchase online, but you will need to select the warehouse closest to you for your account.
Frequently Asked Questions
Can I use my membership online right away, or do I have to wait for a card?
Your membership is active for online shopping when ready after you sign up. You will receive your membership number on screen and by email within minutes. You do not need a physical card to shop online — just log into costco.com with your email and password. If you want to shop in a warehouse, you can print your card from your account or visit your home warehouse to request one.
What if I do not have a credit card?
Costco requires a credit card to sign up online. If you do not have one, you can visit a Costco warehouse in person and pay with cash, debit card, or check at the membership desk. You can also call Costco's membership services line to ask about other payment options.
Can I change my home warehouse after I sign up?
Yes. Log into your Costco account, go to "My Account" or "Membership," and look for the option to change your home warehouse. You can update it anytime. Changing your home warehouse does not affect your membership — you can still shop at any Costco location.
What happens if I forget to cancel before my membership renews?
Costco will charge your card on your renewal date. If you realize this happened within a short time, contact Costco's membership services line and ask about a refund. Costco typically honors refund requests if you contact them shortly after the charge posts.
Can I buy a Costco membership as a gift?
Costco does not sell gift memberships online. However, you can purchase a Costco Cash gift card (a store credit card) online and give that to someone. If you want to give someone a membership, you can visit a warehouse together and sign them up in person, or give them a gift card and they can use it toward a membership purchase.