More than two thirds say fees and charges are too high or unfair, a survey has found.
More than a third (36 per cent) were surprised by the amount charged and 68 per cent said costs were too high, according to Which?
Nearly 25,000 people signed its Stop Sneaky Fees and Charges campaign.
Which? executive director Richard Lloyd said: "We want all banks and current account providers to stop sneaky fees and charges and end excessive, unclear unauthorised overdraft fees.''