Basic rates are:
If work is required to meet a very short deadline or to be undertaken in unsociable hours, these rates may be subject to increase.
The time taken for all editorial services is very dependent on a number of factors, including the quality of the original, the complexity of the material, and the size of the document. As a basic rule of thumb, the longer a document is, the more time should be allowed per word. This is because as document size increases, document complexity also increases, and consistency must be maintained throughout the whole document. The following estimates are therefore very approximate.
Proofreading/copy editing: The Society for Proofreaders and Editors (SfEP) suggests, as a very rough guide, approximately 3,000 words per hour. However, this is very approximate. See http://www.sfep.org.uk/pub/faqs/fusing.asp#q6 for information from the Society for Editors and Proofreaders.
Rewriting/copy writing/ghostwriting: It is very difficult to give an estimate for this kind of work, as there are so many factors involved. Very small projects can often be completed in days, although this will be longer if the material is more complex.
Note: I recommend that another proofreader is employed to give a final check to material that I have written. This is because it is notoriously difficult to spot your own mistakes, however good a writer/editor you are!
Indexing: The Society of indexers suggests 4,000 words per hour for an index to a straightforward text, but this will vary greatly depending on factors such as length of document, complexity of material, and the level of indexing required. See http://www.indexers.org.uk/index.php?id=135 for more factors that may affect the time taken to produce an index.