I follow the rates suggested by the Society for Editors and Proofreaders. Every commission is unique, with varying word-count, degree of intervention required and timescale for completion, so I prefer to provide a personalised quote, rather than rely on a universal fixed price.
As a rough guide, I charge a minimum of £0.035 per word for a 7-day turnaround and will provide you with a track-changed version of your Word document to allow you to choose whether to accept or reject suggested changes.
I calculate an accurate, bespoke quote based on a sample of your work and a description of your requirements. If you'd like more information on how I may be able to help you and how much it may cost, please get in touch via the contact page.