All ADSL lines – regardless of service provider - are subject to contention, meaning that the network bandwidth available is shared between a number of subscribers. The ratio to which the available bandwidth is shared between users is called the "contention ratio". All UK providers, including BT, are subject to the same contention ratios. Services targeted at casual home users are frequently cheaper, but have a higher contention ratio. This means that the available network capacity is shared between a greater number of users. Business services have a lower contention ratio, which will provide a more consistent level of performance. A 50 to 1 contention ration means the bandwidth may be shared with up to 50 other subscribers, whereas a 20 to 1 contention ration means the bandwidth may be shared with no more than 20 other subscribers.