Licensees can now start claiming for refunds from music royalties collection firm, Phonographic Performance Ltd (PPL), to get a share of £20m owed to pubs, hotels and restaurants, following a legal battle.
Letters from PPL, setting out how to claim for a refund, are due to start hitting pubs' letterboxes.
However pubs eligible for a refund are being reminded they must put in a claim, as they will not get money back automatically.
The British Beer & Pub Association (BBPA), which took the case to the High Court with the British Hospitality Association (BHA), has also issued guidance on its website on how to claim refunds.
The long-running dispute over fees charged by PPL for recorded music dates back to 2005.
In October the government's Copyright Tribunal finally agreed with the BBPA and BHA's argument that venues have been paying over the odds since 2005.
PPL appealed the decision in the High Court, but the appeal failed.
PPL is also being forced to put new tariffs in place for pubs, hotels and restaurants - with some venues expected to see their bill cut in half.
The BBPA estimates the ruling will save around £3 million a year for pubs.
"We fought long and hard for these reduced charges and refunds, so we want to ensure that pubs claim what they are owed in full - and as soon as possible," said BBPA chief executive Brigid Simmonds.