Activo Bank, part of the Banco Sabadell group, is one of the few Spanish banks to provide commission free banking without any catches.  I had an Activo Bank Account for a few years and had a positive experience with them.  The only downside was the internet banking was a bit basic and was only available in Spanish (fine for me as I speak Spanish).

The Activo Bank Account offers the following advantages:

• 0 commissions
• 0 maintenance fees
• Free national transfers in euros
• Free euro cheque deposits
• Free bank card issued and free bank card renewals
• Free withdrawals at Banco Sabadell ATMs
• No minimum balance required
• No minimum amount to pay in each month

Many other banks will claim that they offer commission free banking but there is usually a requirement to pay in a minimum monthly amount and/or keep a minimum balance but it is not the case with Activo Bank.

During the time I had the bank account I had no problems whatsever, which is rare with Spanish banks!  I ended up closing my Activo Bank account as I already had a fee free Barclays account which I was really happy with and I wanted to simplify my finances.  Unfortunately, soon after closing my Activo Bank account, Barclays Spain was taken over by La Caixa and then the charges and commissions starting appearing on my account.  I wish I had kept my Activo Bank Account!