Slacker Radio is available for free. However, the free plan imposes a maximum number of song skips on listeners, which is six per hour, according to PCMag. The free plan is also supplemented by frequent audio advertisements.
There are two paid options for listening to Slacker Radio, as stated on the PCMag website. These are Radio Plus and Slacker Premium, which cost $3.99 and $9.99 respectively, as of December 2014.
The Radio Plus payment plan removes advertising and allows listeners to skip as many songs as they wish. The Slacker Premium option allows listeners to create offline playlists, create their own radio stations by artist and play specific songs and albums on demand.