In Russia we do the same, but the important distinction is that generally SLAs differ too. Companies require (and expect) better level of service and tech suppo

In Russia we do the same, but the important distinction is that generally SLAs differ too. Companies require (and expect) better level of service and tech support, so they pay more. Also, from what I've heard — comparing to natural persons — companies cause a bit more work for accounting departments. Note: I don't know about telephony (they do charge more, but I don't know about their SLAs), but it is true for ISPs (I work for one as a programmer).