Many transcription services charge on a per-minute basis. For example, a 30-minute transcription at $1 per minute would cost $30. Costs can add up quickly, and some services bill extra for a faster turnaround time, verbatim files (meaning they include all the "ums" and "ahs"), or if the audio is of poor quality. If you find yourself transcribing audio and video files often, a subscription-based service, such as those offered by Otter and Trint, might be the best value for you. Increasingly, video editing software now has automated captioning, too, so if you use one you might want to first check if it's included. As you might guess, the amount of time it takes to turn around a file usually depends on its length. Automated services can typically process a file in a matter of minutes. Human-powered services take quite a bit longer, and you may have to pay for faster delivery speeds. Rev is simple in that it promises to return your file (in most cases) in a 12-hour timeframe. GoTranscript's slowest option (five days) is also its cheapest.