Developmental editing: what it is, what it costs, and when you need it

A developmental editor is the person who checks whether a book works as a whole. The Editorial Freelancers Association (EFA) says they "deal with content, organization, and genre considerations." On a non-fiction book that means the promise, the argument, the chapter order, the evidence and the repetition. They return a letter, and most add notes in the margins. Authors often shorten the job to a dev edit.

On a non-fiction manuscript, expect the letter to cover six things:

• The promise: what the reader will know or be able to do by the last page, and whether chapter one says so.
• The argument: whether each chapter moves it forward or restates it.
• The order: whether a chapter leans on an idea that only arrives later.
• The evidence: where a claim rests on a case, a source or your own experience, and where it rests on nothing.
• Repetition: the same story or point told in two chapters.
• Gaps: the reader's objection the book never answers.

The EFA names two deliverables: a "manuscript evaluation" (an overall critique) or a revision letter that "outlines the big-picture issues." Reedsy's developmental editors also return your manuscript with comments in tracked changes. Many editors add a call to talk the letter through.

So the developmental editing meaning is narrow: work on the shape of the book. It does not fix sentences, correct commas or check facts; those are a line edit, a copyedit and a fact-check, each priced on its own.

A structural note reads like this one, from a sample report on Augustine's Confessions, a public-domain book: one problem, the evidence, one fix.

Example from a Manuscript AI sample report (Confessions):

Abrupt change in content and difficulty at Book X. The reader leaves Monica's burial and a heartfelt request for prayers and meets technical argument: "the memory is, as it were, the belly of the mind." Nothing prepares for the move from lived event to sustained epistemology.

Improvement: add a short bridging passage at the end of Book IX or start of Book X explaining why a man who has told his conversion must now examine memory, time, and Scripture.

An editor would also mark the spot in the manuscript; the report does not.

A developmental editor for book-length non-fiction costs 4.0–5.0¢ per word at the EFA's 2026 median rates, which works out to $3,200–4,000 for an 80,000-word book. On Reedsy the same book costs $2,080–4,240, plus a 10% commission. Memoir runs lower and business books higher. The work takes three to six weeks once the editor's calendar opens.

The EFA chart gives median ranges from a survey of over 1,100 members about 2025 rates; Reedsy's figures come from quotes on its marketplace.

Hourly rates turn into a project price through reading speed. EFA members who do non-fiction developmental editing report 4 to 8 pages an hour at $57.50–70 an hour. An 80,000-word book is 320 pages, so the edit is 40 to 80 hours of work.

Four things move a quote inside the range:

• Genre. The EFA's business rate is 4.5–6.0¢ a word against 3.5–4.5¢ for memoir.
• The draft's condition. A first draft with chapters out of order takes longer than a revised one.
• Length. Every 10,000 words adds $400–500 at the EFA's non-fiction rate.
• What is included. Ask whether a call and a second read of your revision are in the quote.

The Editorial Department, an editing firm, quotes three to six weeks for most manuscripts of 55,000 to 110,000 words. Reedsy warns that editors "book up months in advance." Rates for the other three edits, side by side, are in what a book editor costs by edit type.

An editorial assessment is a developmental editor's letter without the notes in the manuscript. At EFA rates it costs 1.5–1.8¢ per word, or $1,200–1,440 for 80,000 words, against $3,200–4,000 for a developmental edit. EFA members report a median of $600 per assessment across all lengths. Reedsy prices the gap lower: it says a developmental edit "will typically cost 30% more than an assessment letter."

Choose the assessment if you will do the revision yourself; choose the developmental edit if you want help on the page. What a manuscript assessment contains has a worked example, and the four types of editing shows a line edit and a copyedit before and after.

Most authors find a developmental editor in one of four places: Reedsy's marketplace, the EFA's directory, the acknowledgments of books like theirs, or an editing company. The sections below show how to find an editor for your book in each; the first two are the fastest. The third finds editors with a record in your category. Get at least three quotes.

Reedsy

Reedsy is a marketplace of vetted freelancers. You send a brief to up to five editors, and they usually reply within two business days. Reedsy says it has accepted 3% of the editors who applied. A Reedsy developmental editor sets their own price; Reedsy's 2026 average is $36 per 1,000 words, and you pay a 10% commission on top. Reedsy lists separate editors for biography and memoir, business and self-help.

The EFA directory

The EFA's member directory and job list are free for authors. Filter the directory by non-fiction genre (business, memoir and self-help among them) and by "First-Time Author Friendly." Or post your project on the job list, stating a rate or range; editors contact you. The EFA does not "assign work, make referrals, or set rates."

Acknowledgments pages of books you admire

Open five recent books in your category and read the acknowledgments. Authors thank their editors by name, and some of those editors freelance. It is the slowest route and the surest way to find someone who has shaped a book like yours.

Agencies and editing companies

An editing company assigns the editor and sets the price. Kirkus Editorial's Collaborative Editing, its developmental tier, costs $99 plus 3¢ a word, which is $2,499 for 80,000 words. It includes an editorial letter, line edits and a one-hour call, in 20 business days. You give up the choice of editor and gain a fixed price and deadline. A freelance developmental editor sets their own rate and schedule, so quotes vary more.

Check four things before you pay: books they have edited in your category, references from past clients, the contract, and the payment schedule. Next to a $3,200–4,000 fee, a week of vetting is cheap.

Ask every editor the same four questions:

1. Which non-fiction books like mine have you edited, and may I contact one of the authors?
2. What will I receive: a letter, notes in the manuscript, a call, or all three?
3. Is a second read of my revision included, and at what price?
4. When can you start, and on what date will I have the letter?

Do not judge a developmental editor on a sample edit. The EFA's guide for new authors says developmental editing "is too large in scope to be captured by a short sample edit," and points to references instead. Call two past clients and ask what changed in their book.

The contract should name the edit, the word count, the deliverables, the deadline, the price, the deposit, what happens if either of you stops partway, and that the editor keeps your manuscript confidential. If an editor will not put the deadline in writing, keep looking.

You need a developmental editor when a lot rides on the book and you want a person's judgment and a conversation. Start with the $19 report when you want to know what the structure needs before you pay $3,200–4,000. The report finds problems; it does not rewrite, line-edit or talk them through with you.

Hire the editor first when:

• You are submitting to agents or publishers and want an experienced editor's judgment.
• You want a back-and-forth with someone who asks what you are trying to do.
• You want comments in the manuscript, not a separate report.
• The book is a memoir, where voice and what to leave out matter most.

Run the report first when the budget is tight or the draft is new. It reads the whole .docx in one run, answers eight editorial questions about the book, and gives every chapter a summary, recommendations, word count, reading time and readability scores. It costs $19 and usually arrives in under 10 minutes. Fix what it flags, then hire the editor for what only a person can judge. AI book editors compared covers the other tools.

This example is invented for this page: chapter 5 of a 70,000-word business book for freelance designers, titled "Raising your rates."

Before, 10,400 words:

1. My story: the year I earned $31,000 (2,100 words)
2. Why designers undercharge (1,400)
3. Value-based pricing explained (2,600)
4. Five pricing models compared (1,900)
5. Case: how Maya doubled her day rate (1,200)
6. Scripts for the rate conversation (900)
7. Recap (300)

The note:

The chapter promises a raise, but the first thing a reader can use arrives in section 6, about 9,200 words in. Section 1 retells the origin story that already opens chapter 1. Section 4 repeats chapter 3's table of pricing models. Maya succeeds on her first try, so the case teaches nothing about rejection. Open on a lost project, move the scripts up, cut section 4 to one line pointing back to chapter 3, and show Maya's failed attempt before her successful one.

After, 6,000 words:

1. The email that lost a $9,000 project (500 words)
2. Why the old rate sticks (1,000)
3. The rate conversation in three scripts (1,400)
4. Maya's first attempt, and her second (1,500)
5. Value-based pricing, for projects above a set size (1,200)
6. Back to the email: what to send instead (400)

The revision puts the usable step first, cuts what the book says elsewhere, and ends where it began. At 6,000 words the chapter sits inside the middle half of chapter lengths in The Anatomy of a Bestseller (47 books; 46 measured, the Bhagavad-gita being unscoreable): 4,367 to 6,697 words.