As a merchant may not settle the final bill immediately, tolerance is applied to ensure that there are sufficient funds available when the final bill is settled.
The amount authorised by the merchant plus the tolerance percentage or fixed amount is reserved from your available card balance until the merchant settles the final amount (i.e. payment is requested), at which time the exact final amount is debited from your card, or for 7 days, whichever is sooner.
If the final settlement amount exceeds the relevant available currency balance on the card, the remaining amount will be funded by converting that amount in the usual wallet order. Please see your card Terms and Conditions for further information on the usual wallet order. The exchange rate used is the rate determined by Mastercard®, to be the wholesale rate in effect on the day the transaction is processed by Mastercard plus the foreign exchange fee. Please note that the exchange rate used at the time the transaction is authorised (and the funds are reserved) may be different to the exchange rate used on the day the transaction is settled, however, you will only be charged for the actual and final amount of the transaction you sign for or validate by PIN or contactless.
As the merchant may not settle (i.e. ask for payment) the final bill within the 7 days and in some cases may take up to 30 days to settle (at which time the funds are debited from your card), we recommend that you check your transaction history regularly via My Account and take this into account, including the tolerance, to ensure you have sufficient funds available for your spending. Typically, a merchant will submit the settlement request within 24 hours of you authorising the transaction.
At bars and restaurants tolerances are only applied to transactions authorised by magstripe rather than by chip or contactless. At petrol stations tolerance is applied to all automated fuel pump transactions.