The policy will work like a handbook, providing rules and guidelines to traders and store staff on how pricing should be carried out, and how and why it is different to supermarkets.
Sainsbury's c-stores have always operated on a different pricing platform to its supermarkets and are typically 5% more expensive than its larger stores.
But this will be the first time such a policy has been rolled out by Sainsbury's. "We have to ensure prices do not vary across convenience," said a spokeswoman. "The name of the game over the past year has been improving systems like this."
The policy is under discussion, but Sainsbury's would not reveal details as to the specifics of its content.