Editors’ fees vary so drastically that authors are often (rightfully) confused about how much to pay. I’ve seen copyediting fees that range from $20/hour to $300/hour. That said, I’ve seen plenty of authors pay $20/hour for a poorly executed copyedit that needed to be redone. I know one author who paid $200/hour for a copyeditor who’d worked on a famous best-seller, operating under the false assumption that a good copyedit would be their ticket to best-seller status. That didn’t happen. Get a few bids and consider paying a couple different editors for two hours of their work and compare. It’s important to judge the work rather than the fee. Consider this investment as research rather than money wasted.
Stephen, I’m not sure what you mean by “time wasted matching a style guide.” Any professional editor of trade books knows the Chicago Manual of Style well and as a matter of course automatically makes changes that are in line with it. What you said is akin to “They waste time correcting spelling errors.” They’re not wasting any time; they’re doing their job and it’s a basic and automatic part of that job.
Amazing post, Dave, and definitely an important topic. My first book I used one of the larger “editorial agencies” you mentioned. The quality wasn’t bad but there was no direct contact with the editor. Just ship it to them and they ship it back. I’ve tried out several editors now and found a very good one who did a great job on my list book. Once you find a good editor, stick with him/her and build a relationship if you can. Thanks for the list provided and this editors test is a great addition.
Look at the front and back of the next page for acknowledgements. If an author worked closely with an editor throughout the writing process, they may choose to include their name in the acknowledgements page. The acknowledgements page is usually a few lines of text centered on a blank page after the copyright information. Read it to see if the editor is mentioned.[4]
I’m sorry you feel that way about my participation in the discussion and defending editors of similar background to myself from what I considered unwarranted disparagement. Perhaps the only approach that would have 100% proof against accusations of “trolling” would have been to allow the claims to stand unchallenged, but that did not seem fair to people who come here to get useful information.
The price you’re going to pay an editor depends on a lot of different factors. You may just want an editor to proofread your book to catch minor errors and typos. Or you may want to work with an editor to help you overhaul your book. Getting familiar with the kind of editing options available will help you choose the right editor. Typical book editing services are:

If you’re a first-time author and have never hired an editor before, I would not recommend hiring an editor without first getting a sample edit. An editor can have a great resume and speak eloquently on the phone, but the real test of their skills is how they edit your book, and the sample edit is a quick, free way to find out. It’s standard for a freelance editor to offer a free sample edit unless they are exceptionally well-known.

#2. YOUR BEST BOOK: nearly every other copy editor or editing service focuses on the writing and the mistakes. They will improve the flow of the words and sentences, and they will make it better, but they won’t fix the major problems with content. Our editors have been trained in the Write Good BooksTM method to make sure your book is commercially sound and will resonate with your audience on a deeper level. For nonfiction we focus on branding, credibility, trust, so your readers will take action and see results. For fiction, we focus on universal story telling principles, plot structure, dramatic tension and suspense, and world-building. Because a clean book isn’t always a good book.
I usually ask for a 10-20 page sample – one page is a bit scant for a really accurate estimate. I’ll do an editing sample, too, but how long I’m willing to make it depends on the proposed length of the piece I’ll be editing. As for the “hidden message” strategy, if I saw something like that, I’d suspect the prospective client was fearful and suspicious and I’d probably run the other way. I willingly provide testimonials, references, and links to published work, so tricks aren’t necessary. It’s important to me to build a professional relationship of mutual trust with my clients, backed up, of course, by a contract that protects us both. I don’t think I’d like to work with a client who plays “gotcha!” Lots of good suggestions in this article, though.
For my book, Career Change, I gave an early copy to people working in my department in the day job who I knew were dissatisfied with what they were doing. They came back with questions and suggestions for what to include as additional material. For The Healthy Writer, we asked medical doctors to read it as a sense check (even though my co-writer, Euan Lawson, is a doctor!)

I was recently directed to your excellent article from almost a year ago by a colleague at SouthWest Writers in Albuquerque, New Mexico. As a freelance literary editor of memoir, poetry, and novels, I offer authors guidance and support similar what you describe, but of course I cannot handle editing every genre. I was gratified to know that I’m doing the right thing by sticking to my specialties. By coincidence, someone who reached out to me last week on LinkedIn was looking for a children’s book editor and one of your readers in this conversation recommended one. That reminds me… Read more »
So because of this and because I don’t live in NYC or LA, I decided I may have better luck writing a book, which I have been doing for several months now and enjoy; however, I know it needs work and I can’t go back to the 5th grade and pay better attention to the simple “put your period here and comma there” lessons so I was hoping to learn as I go with reading, writing and seeing my finished product after hiring an editor.