Why Your Book Index Costs $1,200 (And What to Do About It)

If you have ever published a nonfiction book — or you are about to — you have probably hit this moment:You have spent months writing. You have edited, formatted, and designed your cover. You are almost at the finish line. Then someone asks: "What about the index?"You check a few indexing services. The quotes come back: $1,000. $1,200. $1,500.For many self-published authors, that is more than the book will earn in its first year.## Why Professional Indexing Costs So MuchProfessional indexers typically charge $3 to $6 per indexable page. For a 300-page nonfiction book, that works out to $900–$1,800. Most charge around $1,200.Here is why the price is what it is: It is skilled intellectual work. A good indexer reads your entire book, identifies key concepts, names, and themes, then creates a structured reference system that helps readers navigate your ideas. It takes time. Most indexers need 2–4 weeks for a standard nonfiction book. Rush jobs cost more. Supply is limited. There are only a few thousand professional indexers worldwide, and the good ones stay booked up. It cannot be easily outsourced. Unlike copy editing or formatting, indexing requires deep comprehension of the book's subject matter.The result: indexing is one of the most expensive per-hour costs in the entire publishing process.## The Hidden Impact of Skipping the IndexFaced with these costs, many authors make a rational decision: skip the index.This is understandable, but it has real consequences:For readers:* Nonfiction readers use indexes constantly. A 2019 survey by the American Society for Indexing found that 77% of nonfiction readers consider an index important or essential. Academic and professional buyers often check the index before purchasing. Without an index, your book is harder to use as a reference — which is often the main reason people buy nonfiction.For your book's credibility:* An index signals that your book is professionally produced. Its absence signals the opposite. Reviewers notice. Library acquisition committees notice. Course adoption committees notice. In some genres (academic, technical, reference), publishing without an index is simply not an option.For discoverability:* A well-structured index improves the book's utility, which drives reviews and word-of-mouth recommendations.## What Authors Actually DoIn practice, authors facing the indexing decision fall into three camps:1. Pay the $1,200. Authors with publisher support or higher budgets bite the bullet. The index is professional, but the cost hurts.2. DIY in Word. Some authors try to create their own index using Word's built-in indexing tools. This is technically possible but painfully tedious — it means manually tagging every reference, one by one, across hundreds of pages. Most authors abandon this after a few hours.3. Skip it entirely. The most common choice for self-published authors. No cost, but real impact on the book's perceived quality and usability.None of these options is great. Pay too much, suffer too long, or compromise your book.## A Fourth Option: AI-Powered IndexingThis is why we built Onomastic.Onomastic uses AI to generate a professional-quality draft index from your manuscript in minutes — not weeks. You upload your book, the AI identifies subjects, names, concepts, and themes, and produces a structured index following standard conventions (Chicago Manual of Style, ISO 999).But here is the important part: you keep full editorial control. The AI gets you approximately 90% of the way there. You refine, merge, and adjust in our editor. You know your book better than any algorithm.The result: a publication-ready index at a fraction of the traditional cost and timeline.### What about quality?This is the right question to ask. AI-generated does not mean amateur.Onomastic follows established indexing conventions. The draft it produces includes: Subject entries with page references Name entries (people, places, organizations) Cross-references (see and see also) Subentries for complex topics* Proper alphabetization and formattingIs it identical to what a $1,200 professional indexer would produce? Not always. But it is a strong starting point that you can refine in a fraction of the time.### What about privacy?Your manuscript is your most valuable asset. We take that seriously.Onomastic deletes your manuscript the moment you export your finished index. We never store your work. We never train our models on your content. Your words stay yours.## The MathLet us break down the economics:| Approach | Cost | Time | Quality || -------------------- | --------------------- | --------------- | --------------------------------- || Professional indexer | $1,200+ | 2–4 weeks | Excellent || DIY in Word | Free | 20–40 hours | Variable || Skip the index | Free | None | N/A || Onomastic | Founder pricing (TBA) | 1–2 hours total | Professional with your refinement |For authors publishing multiple books per year, the savings multiply fast.## Get Early AccessOnomastic is launching soon. Early waitlist members get founder pricing — the lowest price it will ever be.Join the waitlist at onomastic.appYour book deserves a proper index. Your budget deserves a break.