Products in the Waitrose Brand Price Match initiative include staples like Heinz baked beans and Persil washing powder.
To ensure Waitrose can maintain its commitment, prices will be monitored twice a week to ensure they are kept in line with the UK's biggest supermarket.
Waitrose has unleashed a back to basics marketing campaign to promote its move, with full-page ads running across national newspapers today (Monday).
Price matching Tesco in everyday brands has already been employed as a strategy by Ocado, the online grocer that is partnered with Waitrose.
The move by Waitrose is just the latest salvo in an increasingly competitive price battle across the country's major supermarkets.
Last week, , backed by a major marketing push, as it moved to prevent consumers from returning to branded products.
and rolled out another Jamie Oliver ad for the relaunch of its Taste the Difference range.
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