The move means Tescos 13 million Clubcard holders will receive points for every bag they do not use. Checkout staff will ask customers how many bags they are reusing and agree the number of points to be awarded.
Points will not be restricted to the reuse of Tesco bags, with shoppers able to reuse any carrier bag.
Clubcard statements will also highlight customers green points, so they can see how much they are doing for the environment.
The supermarket said the new scheme follows research into how to encourage customers to use fewer bags and recycle old ones. It found the need to reward positive behaviour rather than trying to force change.
Tesco chief executive Sir Terry Leahy said: Clubcard has changed the way we serve customers over the last ten years and made us a more responsive business. Now I believe we can use it to respond to the very real concerns people have over environmental issues like carrier bags and bring about a major shift in behaviour.
The scheme has been welcomed by the Waste & Resources Action Programme.
Leahy added that Tescos aim was to reduce the number of bags it gives out by 25% over the next two years a billion fewer bags a year. To boost the initiative over the next 12 months the supermarket will also be giving every Clubcard holder a coupon for a free Bag for Life.
Posted by Jennifer Perkins