Roger Gewolb, from the firm, said: “It would be totally unsurprising if the other banks now followed in the same direction.
“Our research shows 10.5 million people are in the worst financial state of their lives. This is a clear indication that the banks are out of touch with the very serious financial situation millions find themselves in.”
Nationwide Building Society also introduced a 39.9pc charge across all its current accounts last year.
The FCA said it expected the typical cost of borrowing £100 through an unarranged overdraft to drop from £5 a day to less than 20p a day.