Short answer: free to publish, $0–$2,000 to do it properly.
| Item | DIY cost | Professional cost |
|---|---|---|
| Publishing on Amazon KDP | $0 | $0 |
| Formatting (ebook + print) | $0 (Word/Reedsy) | $147–$250 (Atticus / Vellum) |
| Book cover | $0 (KDP Cover Creator) | $200–$500 (designer), ~$3–$15 (template tools) |
| Professional editing | $0 (skip or AI pass) | $300–$1,500 (developmental + copy edit) |
| ISBN | $0 (KDP free ISBN) | $125–$295 (own ISBN via Bowker) |
| Proof copies | $5–$15 | $5–$15 |
| Launch ads / promo | $0 | $50–$500 |
A typical solo author publishing cleanly but cheaply spends $150–$600. Going fully professional (editor + designer + ads) runs $1,000–$2,500 per book. Many successful first books are published for under $200.
1. Printing costs are per-copy, not setup. KDP print-on-demand means no inventory, but each copy sold deducts printing cost from your royalty — check your exact printing cost before pricing.
2. Tools pay for themselves. A $147 formatting tool is worth it if it gets you 200 extra pages read per month — that's ~$115/month at current KENP rates. Run the KENP math before you skip the paid tools.
Low-content books are the cheapest niche to enter: no editing, no story, just a reusable interior. Costs are basically cover + formatting ($0–$30), and they sell at $6.99–$14.99. Competition is heavy, but niche planners (teachers, nurses, real-estate agents, therapists) still work at the long tail.
Your real profit per sale = list price × royalty rate − printing cost. A $12.99 paperback with a $4.60 printing cost earns about $3.19 on Amazon (60% royalty). A $4.99 ebook at 70% with a 1 MB file earns about $3.42. Calculate yours here.