A points or voucher system is the most popular type of reward scheme with 68% of reward cards offering this. 22% offer cashback and the remaining 10% Air miles.

However, the findings reveal that the financial value of these rewards can vary wildly. Looking at cashback deals for example, on an annual spend of £6,000, the average reward is just 0.77% and only 27.2% of the cashback deals available pay 1% or more.

The Sainsbury’s Finance double Nectar point reward, available on the Sainsbury’s Nectar Credit Card and Sainsbury’s Gold Credit Card, offers the equivalent of an extra 1% off your Sainsbury’s shopping when used in conjunction with a Nectar card, the total combined reward is therefore equivalent to 2% off.