CHARGES
How much will it cost?
It depends... a most annoying answer, but true. Projects are costed individually, based on:
- service required (copy-edit or proofread?)
 - extent (number of words?)
 - condition of material (one author, or multiple contributors?)
 - format (Word document or PDF?)
 - scope (a one-off or a series of discrete tasks?)
 - delivery deadline.
 
For example, a bi-fold marketing leaflet would probably require a straightforward proofread. On the other hand, a 30-page report written by three separate authors would probably require a copy-edit.
Sight of copy to be edited is the most effective way for me to assess a job. The more information I have, the more accurate my estimate will be.