For copy editing, I charge a rate of $30 per hour or per 5 standard pages (250 words), whichever benefits the writer more. For example, if I can edit an average of seven or eight of a story in an hour, I charge by the hour. If I can only edit five or fewer pages per hour, I charge the five page rate.
Many variables affect copy editing speed, including intended audience, length, genre, writing style, and amount of required line edits. Please send a writing sample from the story you would like edited, so that I can give you an accurate estimate.