On average you will collect 2 miles per £1 spent when converting 100% of your savings vs. the high-street banks. However your earn rate may differ slightly based on your Currensea plan and bank fee savings as a result of transaction type and size. Converting less than 100% of savings will result in fewer miles collected (find out more).
In instances in which you have exceeded your free ATM withdrawal limit and have been subject to the additional FX markup or you are spending in the non interbank currencies, you may receive slightly less than 2 miles per £1 while contributing 100% towards KrisFlyer miles.