It varies wildly from person to person, but anyone who uses their indó debit card instead of their old debit card will save something. If you are a regular debit card user, according to information from the Central Bank of Iceland, you can save around 40 thousand per year by getting rid of transaction fees, debit card annual fees, 3% foreign exchange surcharges and much better interest on your savings account.
If you have a credit card, you're actually saving a similar amount. You don't pay credit card transaction fees, but you do pay a hefty "processing fee" each month, plus credit card annual fees that can run into the tens of thousands.
What are you waiting for? Stop paying your bank to use your money.