Barclaycard holders will receive 10% reward money for every purchase at participating retailers from Thursday (7 July) until 10 July.
Typically cardholders earn 1% cashback on purchases.
Retailers signed up to the Barclaycard Freedom programme include Pizza Express, Goldsmiths and Shell.
The Freedom programme launched 15 months ago and was designed as a loyalty scheme to help shoppers earn rewards in pounds, not points.
Earlier this year, Barclaycard Freedom revealed that it hoped to boost take up numbers by 50% to 1.5 million this year.