What You'll Need to Apply Online

Opening an InterestPlus Online Savings Account is easy

Have the following ready for each person to be listed on the account:

  • Social Security Number
  • Driver's license or state-issued identification
  • Checking, savings or brokerage account and routing number to make your initial deposit
  • Your Costco membership number

Ready to start your application?

This application can always be saved, so you can leave and come back later to finish.

Click continue to start your application.

Responding to a promotion or offer?

Enter your offer code here before clicking continue above.

Retrieve a Saved Application

Saved an application? Retrieve it here!

Retrieve a Saved Application.

Please enter your five-digit ZIP Code

We ask for your ZIP Code as product offerings and features may differ among geographic locations. You may change your ZIP Code at any time.