Medical Transcription Service Average Costs. It is standard for medical transcription services to charge per line of text. Although the average cost is usually $0.12 to $0.14 per line, prices can actually range anywhere from $0.07 to $0.20 per line.Many providers will let you do a trial run at no charge.This is a great opportunity to compare vendors.ou want a transcription service that strives to meet all of your practice’s healthcare documentation needs. It is standard for medical transcription services to charge per line of text. Although the average cost is usually $0.12 to $0.14 per line, prices can actually range anywhere from $0.07 to $0.20 per line.