If you work for an agency or company that provides behavioral health services, there may be licensed staff that can offer supervision towards licensing for free as part of the work benefits. If this is not available, some offer to pay for your outside supervisor, so be sure to ask if either of these options are available.
Typical costs for supervision can be the same that the supervisor would charge for a private pay client session, however, if you are unable to pay this amount most qualified supervisors will offer a discount based similar to their sliding scale fee. If you are able to partner with a fellow therapist who is pursuing the same license, you may be able to split the supervision fee if the supervisor accepts this arrangement.