The AI Barn

Is AI ebook publishing on Amazon KDP worth it? Disclosure rules, limits and risks

By Rob Falconer Published Updated

Read this first: this guide is based on Amazon Kindle Direct Publishing (KDP) help pages and content guidelines, checked 24 October 2026. It isn’t a report of our own publishing results, and it makes no claims about what you might earn. KDP’s rules change, so always read the current versions linked in the sources. There are no affiliate links on this page.

The pitch, and the reality

“Use ChatGPT to write a book in a weekend, upload it to Amazon and earn royalties while you sleep” is one of the most heavily marketed AI side hustles. Publishing on KDP is free and genuinely open to anyone, and AI tools can help with outlining, editing and formatting. But Amazon has rules aimed squarely at fast, low-effort AI books, and the store is crowded. Before you spend money on a course promising otherwise, it’s worth knowing what those rules say.

Rule 1: you must disclose AI-generated content

KDP’s content guidelines say you must tell Amazon about AI-generated content (text, images or translations) when you publish a new book or edit an existing one. KDP draws a line between two kinds of AI use:

  • AI-generated: the AI produced the content, even if you then edited it substantially. This must be disclosed.
  • AI-assisted: you created the content yourself and used AI to edit, refine, error-check or brainstorm. KDP says you don’t need to disclose this.

Either way, KDP says you’re responsible for making sure the book follows all its content guidelines, including on intellectual property. An AI tool can reproduce other people’s work, trademarks or characters; “the AI wrote it” isn’t a defence.

Rule 2: there’s a limit on how many titles you can publish

In September 2023 Amazon announced a cap on how many new titles a KDP account can create, explaining that it was a response to a rise in publishing volume. KDP’s current “Create a book” help page sets a weekly limit on creating and submitting new titles in each format, which resets each week; check the page for the current number. The message is clear: the “publish 100 AI books and let volume do the work” approach is something Amazon has deliberately limited.

Rule 3: low-quality books can be removed

KDP’s Guide to Kindle Content Quality lists problems that can lead to quality warnings, a book being blocked from sale, or action against the account. Its examples of a “disappointing content experience” include books that are:

  • too short to be useful to a reader,
  • not significantly different from other books already on sale,
  • made up largely of content that is freely available on the web, or
  • repeating the same content excessively.

Formatting and translation problems also count, such as missing content, broken tables of contents or machine translation that reads badly. KDP recommends checking the book with its free Kindle Previewer tool before publishing. Thin, generic AI text on a popular topic runs straight into several of these.

How royalties actually work

For ebooks, KDP offers two royalty options:

  • 35% of the list price, with no delivery charge.
  • 70% of the list price after a delivery cost based on file size, available only in certain territories and only if your price sits within a set band.

KDP’s list price page says the 70% band on Amazon.co.uk runs from £1.77 to £12.99 (US $2.99 to $12.99), following changes that took effect on 7 July 2026. Prices on Amazon.co.uk include VAT, and the royalty is calculated on the price excluding VAT, so the share you receive on a UK sale is smaller than the headline percentage suggests.

Royalty rates tell you nothing about sales, and there’s no reliable figure for what a typical AI-written ebook earns. Most self-published books sell few copies; any course quoting monthly royalty screenshots is showing you its best case, not yours. Our guide to red flags in AI income claims explains what UK rules say about that kind of marketing.

UK things to sort out

  • Tax. Royalties are self-employment or trading income. The £1,000 trading allowance and registration rules apply; see our UK side hustle tax basics. KDP will also ask you for a tax interview so it applies the right US withholding rules.
  • Copyright. The UK government has consulted on copyright and AI, including whether to keep the special protection for computer-generated works, so the law here may change. Treat anything you didn’t substantially write yourself with caution, and never feed copyrighted books into a tool and republish the result.
  • Non-fiction risk. AI tools can state wrong facts confidently. A wrong answer in a health, money or legal book can harm readers and get the book removed. Fact-check everything against original sources.

So, is it worth it?

Based on Amazon’s own rules, using AI to mass-produce ebooks is a poor bet: you must disclose AI-generated content, you’re limited in how fast you can publish, and low-effort books can be removed. A book where you bring real knowledge, and use AI to help you plan, edit and polish, fits KDP’s rules much better, but it’s real work, and sales are never guaranteed.

If you’re weighing it up:

  1. Pick a subject you genuinely know and can check.
  2. Look at what already sells in that category and ask what your book would add.
  3. Write or heavily rewrite it yourself; use AI as an assistant, and record what you used it for so you can answer KDP’s disclosure question honestly.
  4. Proofread, format and check it in Kindle Previewer.
  5. Spend nothing on “done-for-you” AI book courses until you’ve read the free KDP help pages below.

For other ideas with their costs and risks laid out, see AI side hustle ideas for the UK.

Sources

All checked 24 October 2026.

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