Book writing cost by word count — what 50k vs 80k vs 120k actually costs

Word count moves cost more than any other variable. Three common book lengths, three different quote profiles.

50,000 words — the short non-fiction book

50k is roughly 200 trade paperback pages. It is the lower end of business books and the upper end of long-form essays. The math at our rates:

• Ghostwriting: $9,800 (Standard tier). Roughly $0.196 per word.
• Copy editing: $0.018 × 50,000 = $900.
• Line editing: $0.032 × 50,000 = $1,600.
• Developmental editing: $0.055 × 50,000 = $2,750.
• Formatting (print + ebook): $890.
• Cover design (ebook + print): $1,150.

A serious production at 50k, ghostwritten through launch, lands around $14,000–$16,000.

80,000 words — most novels and most non-fiction

80k is the sweet spot. Most novels live in 75–95k. Most full-length non-fiction lives in 60–85k. The market expects books to land in this range; readers complete books in this range at higher rates than longer books.

• Ghostwriting: $16,400 (Professional tier).
• Copy editing: $1,440.
• Line editing: $2,560.
• Developmental editing: $4,400.
• Formatting and cover: same as above.

A serious production at 80k typically runs $19,000–$24,000.

120,000 words — fantasy, historical, deep non-fiction

120k is where things stretch. Fantasy series book one frequently lands here. Historical fiction often does. Deep narrative non-fiction with research load sometimes does. Anything over 130k starts to scare readers who have not committed to your series.

• Ghostwriting: $28,500 (Signature tier).
• Copy editing: $2,160.
• Line editing: $3,840.
• Developmental editing: $6,600.

A 120k production lands $32,000–$38,000 typically.

Why per-word rates are not linear

The marginal cost of an extra 20k words is not proportional to the base rate. Editing scales nearly linearly because the editor reads every word. Ghostwriting scales sub-linearly because the outline and voice work are mostly front-loaded; once the writer is in the rhythm of your voice, words 60,001–80,000 are cheaper to write than words 1–20,000.

That is why our Signature tier (100k+) is not 2× the Standard tier (50k); it is 2.9×. The math is honest about where the work actually sits.

Word count’s hidden second cost: timeline

A 50k manuscript is 14 weeks of drafting. An 80k manuscript is 16–18 weeks. A 120k manuscript is 20–22 weeks. Doubling word count is not doubling timeline because writers do not write at constant speed; the first 5k and the last 5k are slower than the middle 70k. But the trend is real, and a 9-month book is a different commitment from a 5-month book.

What we recommend

Three rules. For business books, target 55–75k unless the framework genuinely demands more. For memoir, target 70–90k. For genre fiction, target 75–95k for standalone or 80–110k for series book one. Going longer because you can almost always hurts the book. The discipline is in the cut.

If you’re not sure where your book sits, send us a brief and we’ll tell you. Honest word-count guidance is the single most useful thing an editor can do at outline stage.