Can I use my Mastercard at merchants that do not accept Mastercard credit cards (i.e.Costco)? May 20, 2020 23:20 Updated Follow Yes, you can use your new Money Debit Mastercard at Costco and anywhere else that accepts debit cards. Related articles What are the benefits and features of the SoFi Money Mastercard debit card? Can you expedite the arrival of my SoFi Money Mastercard debit card? How do I get a SoFi Money debit card for the joint account? Can SoFi Money be used with Zelle and related 3rd party payment providers? How do I file for SoFi Money Mastercard ID theft protection?