Under the terms of the New Deal, which will be relaunched on 28 October, Spar retailers will be given 15 promotional items at lower prices to give them a bigger margin.
The promotions will also be supported by better in-store marketing material to help boost sales.
"There is an even greater demand from shoppers for more competitive pricing," said Capper & Co sales director Bryan Walters. "By updating this scheme we are keeping in line with the changing market trends and in our support to our retail members."
Capper & Co is also to adopt Spar's low price value scheme, Everyday Value, for the first time as part of its drive to improve price perception.