If you started your Apple Music trial the day the service was launched, your free trial will end on September 30th, 2015.
For those who have decided Apple Music is not for them, you will want to be sure that your subscription is not set to auto-renew; otherwise, Apple will not hesitate to charge your credit card in order to continue your service.
9to5Mac has put together a helpful guide on how to cancel your Apple Music subscription from either iOS or OS X. Just follow the link below:
How to cancel your Apple Music subscription!