Asda shoppers are being urged to sign up to its Cashpot for Schools initiative as over £4 million has been raised so far for local primary schools across the UK.

The supermarket chain has been asking customers to sign up for its Cashpot for Schools initiative, which donates 0.5 per cent of each customer's shop to a school of their choice.

The initiative, backed by Joe Wicks, began on September 2 and has already reached the £4 million milestone.

With five weeks still to go, Asda hopes the campaign continues to succeed.

More than 21,500 of the 22,000 state-funded UK primary schools have signed up for the scheme, with 42 schools already having more than £1,000 in their cashpots.

The money is given directly to schools to be spent on whatever they need.

The highest earning school so far is Dunbar Primary School in Scotland which has £2,370 in its cashpot.

The campaign was launched after research revealed that some parents are asked to give up to £138 per year to support their children's schools, with school trips, books, and sports equipment being the most underfunded needs.

The initiative is open to all, so schools are encouraging their entire community to support them.

Stephen Bromby, Asda Community Champion at Boston has been in his local community to tell schools about the initiativeStephen Bromby, Asda Community Champion at Boston has been in his local community to tell schools about the initiative (Image: Supplied)Asda has partnered with the charity Parentkind for the initiative, allowing families to select their school of choice in the app.

Parentkind is conducting diligence on all school bank data to ensure that, when the campaign closes, cash pots can be transferred to schools for them to invest in the resources they need.