Aren't merchants typically charged 3%?
Now the EU has limited the Interchange Fee paid by EU merchants by an order of magnitude:
>For card payments carried out by the cardholder in a shop ("Card Present Transactions"):
> 0.2% of the value of the transaction for debit cards;
> 0.3% of the value of the transaction for credit cards:
>For online payments ("Card Not Present Transactions"):
> 1.15% of the value of the transaction for debit cards;
> 1.50% of the value of the transaction for credit cards.
Source: http://europa.eu/rapid/press-release_IP-18-6655_en.htm