A warning has been issued to anyone who banks with Barclaycard after a change in rules.
Money Expert Martin Lewis warned that minimum payments for Barclaycard customers are rising by up to 50 per cent this week.
During his ITV show, The Martin Lewis Money Show which advises people on their finances, he urged customers to be aware.
However, he couldn't reveal the exact figure due to each minimum payment being personalised, the Liverpool Echo reports.
The financial guru said the rule change spells both good and bad news for customers.
Martin said: "This is the good news, the rise means you will pay less interest and clear debt quicker.
"The bad news is it will affect your cash flow."
Martin recommended speaking to Barclays if you are struggling or can't afford to make the minimum payments.
He added: "This may affect your cash flow so it's probably worth working out what is happening."
It comes as the expert urged more than one million Brits to claim a refund of up to £54 before the end of the week.
In his weekly newsletter on MoneySavingExpert, Martin revealed that people can claim a refund of power of attorney fees before Sunday.
