Publishing an ebook gives you a work you can keep offering to readers. It does not establish a recurring income stream by itself. AI can help with drafting and formatting; you still need useful content, editing, rights checks, a cover, and a way for readers to find the book.
This guide separates royalty arithmetic from sales forecasts. The numbers below are hypothetical planning examples, not average DraftZero customer earnings or evidence that a catalog will sell.
Calculate the royalty before estimating income
KDP offers 35% and 70% ebook royalty options. The 70% calculation applies the rate after applicable tax and delivery costs have been removed. At the same price, a larger file can change which option earns more. Check the file size KDP calculates after upload.
Consider a $4.99 ebook sold to an eligible US customer, with no applicable tax deducted in this example and a 2MB KDP file. Delivery is $0.30. If all 70% conditions are met, 0.70 × ($4.99 − $0.30), rounded to cents, is $3.28 per sale. At 35%, with the same tax assumption, the royalty is $1.75. Neither amount is your profit after production and promotion.
| Assumed monthly sales | Royalties at $3.28 per sale | Balance after a hypothetical $100 monthly cost |
|---|---|---|
| 0 | $0.00 | −$100.00 |
| 10 | $32.80 | −$67.20 |
| 31 | $101.68 | $1.68 |
| 100 | $328.00 | $228.00 |
Thirty-one sales is a break-even requirement under these assumptions, not a sales prediction. The balance excludes tax on your income and the value of your time. Include editing, illustration, cover design, tool usage and advertising in your own cost sheet. Returns and price matching can also affect the amount reported by KDP.
Use the KDP royalty calculator to change the price, tax amount, file size and eligibility assumptions. Start without Kindle Unlimited income if you do not yet have actual reading data.
Check pricing and distribution conditions
As checked on October 4, 2026, the Amazon.com 70% list-price band is $2.99–$12.99. Price is only one requirement: territory, rights and the relationship to a physical edition also matter. A price in the band does not guarantee 70% on every sale. See our pricing guide for examples and the official conditions.
Reusing a blog, note archive or newsletter? KDP Select requires digital exclusivity, including distribution on your own website or blog. Check that requirement before enrolling a book that reuses material you intend to keep distributing elsewhere. Publishing without Select is an option. Ask KDP support if you are unsure how the rule applies to your existing material.
Select also makes the ebook available in Kindle Unlimited. Its page-read payments depend on monthly fund and reading data; they are not a fixed payment per ordinary PDF page. Record actual KENP and royalties separately from purchase royalties. Do not assume that subscription availability multiplies your sales.
Build one useful book before building a catalog
A focused book can start with something you already know: the process you explain to clients, an edited newsletter series, or lessons from running a business. Specify the reader and the question the book answers. Search existing titles and inspect their contents and reviews to see what your book can add. A narrower topic can clarify the promise; it does not prove demand or low competition.
- Choose an outcome: Direct sales, enquiries and a book you distribute at events are different goals. Measure the goal you chose.
- Check ownership: Review images, quotations, guest contributions and personal information before reuse. Owning the surrounding article does not establish rights to every element.
- Edit the material into a book: Remove duplicated sections, explain missing context and connect the chapters. Add your own examples and check factual claims. Do not present invented AI experiences as yours.
- Preview the files: Read the EPUB on a reading device or previewer, checking navigation, images, headings and links. Review the paperback file separately. A valid file is not evidence that the writing is ready for publication.
- Match the listing to the content: Write an accurate description and complete KDP's AI-generated-content declaration when applicable. Substantial editing of AI-generated text does not change KDP's definition to AI-assisted.
Allow time for research, review, cover preparation and KDP review rather than using generation time as the whole production schedule. DraftZero's free manuscript formatting and EPUB conversion tool lets you start with existing writing. If you want a new AI draft, try a sample, then check the required points shown before generation and the current pricing. A fixed points pack is not a promise of a fixed number of full-length books.
Decide on the next book using actual results
Related titles can give a satisfied reader a next step, but each needs a distinct purpose. Ten overlapping books do not establish ten separate income streams. Start with one finished work, gather questions and results, and decide whether the next useful step is a revision, a second book or a different way to reach readers.
| Keep a record of | What it helps you decide |
|---|---|
| Price, royalties, returns and KU payments | Compare KDP reports with your assumptions. |
| Editing, cover, tools and promotion costs | Calculate the balance after actual spending. |
| Promotion channel and date | Compare responses to your newsletter, posts or events. |
| Enquiries and reader questions | Assess a branding goal and choose useful additions. |
| Revision and date | Keep the book and its description consistent. |
Change one major variable at a time when you compare results. Keep the previous manuscript, cover and listing settings so you can restore them. A short period with few sales may not be enough to draw a conclusion.
Questions before you start
Can AI-generated books guarantee passive income?
No. Royalties require purchases or qualifying reading. Publishing and maintaining useful content takes work, and the examples here are calculations rather than forecasts.
Is $4.99 always the best price?
No. It is the assumed price in the US example. Compare your audience, the book's scope, file size, costs and actual response before choosing or changing a price.
Can I keep the same content on my blog?
Check KDP Select's digital exclusivity requirement before enrolling. Publishing without Select is another option. Ask KDP if the status of reused material is unclear.
Official sources checked
Checked October 4, 2026. Recheck the rules when publishing.