Yes. You have the option to save the credit card information when you add funds or purchase content with a credit card in the Nintendo Switch eShop.

Credit card information can be saved according to the following guidelines:

• The option is available to Nintendo Account members aged 18+
• One credit card can be stored per Nintendo Account
• The same credit card can be stored to multiple Nintendo Accounts
• Adjust the Nintendo eShop password entry settings to determine whether a password is required when using a stored credit card with your account.
• Credit card information stored on your Nintendo Account does not carry over to a linked Nintendo Network ID (or vice versa).
• Credit card information stored on your Nintendo Account can also be used for off-device purchases.