The initiative offers a pan-European licensing solution for independent publishers and almost £7m in royalties have been distributed through IMPEL so far.
Ben McEwen, Head of Online, PRS for Music, said: 'It’s been a year of significant milestones for PRS for Music’s online licensing activity, with a number of key new services licensed and the continued growth of IMPEL proving itself to be a force in the market.
'Our ongoing commitment to support the growth and development of legitimate music services across is great news for our members at a time of continued transition for the wider industry. I am very optimistic 2012 revenues will reflect the strides we have made in pan-European licensing.'
Joanna Hagger, Warp Music Publishing, said: 'Joining IMPEL was a simple process and we've received support from a great team so far. It is important for us to work across the whole of Europe with a direct licensor that understands the needs of an independent.'
IMPEL was set up in 2010 and was the first vehicle to allow independent publishers to take advantage of the European Commission Recommendation on the collective management of online music rights and provides a convenient one-stop shop for licensees. IMPEL chose PRS for Music as its partner society to license and administer the participating publishers’ rights on its behalf, and has the full support of the Music Publishers Association