N26 is the best low-cost bank in Spain. This is a German bank that has the latest technology and mobile applications in place. It offers its Spanish users a Spanish IBAN account, offering the flexibility to utilize direct debits. It is also a path breaker of offering best-in-class digital facilities such as a website and an app while helping you track daily expenses. 

This is a free online bank account offering zero hidden fees. You can easily sign up online in only a few minutes, start with your expenses and let the free virtual debit Mastercard help you. They also have the option of a physical card available if you need one.