Amazon KDP Formatting Mistakes That Get Your Book Rejected
You finished the book. You wrote the blurb, you have a cover, you hit upload, and Amazon comes back with an error you do not understand. Or worse, it goes through, and the first review says the text is a mess on a phone. Formatting is where good books quietly fail. Here are the mistakes that trigger rejections and refunds, and the fix for each.
Formatting problems fall into two families that behave differently. E-book problems usually do not get you rejected, they get you one-star reviews, because the file technically works but looks broken on a reader's device. Print problems usually do get you rejected, because a printer has hard physical requirements and enforces them without mercy. Knowing which is which tells you where to look when something goes wrong.
E-book mistakes: the ones readers punish
1. Uploading a word processor file directly
The single most common error. A word processor document is built for a fixed page. An e-book has no fixed page, the text reflows to fit a phone, a tablet or an e-reader at any font size the reader chooses. Upload the document raw and your careful layout survives on none of them. The fix is to publish from a proper EPUB, which is designed to reflow.
2. Manual formatting that breaks on reflow
Tabs to indent paragraphs. Blank lines to force a page break. Spaces to centre a title. Each of these assumes a page that does not exist in an e-book. On a small screen they turn into stray gaps, half-indented paragraphs and headings stranded mid-page. Indentation, page breaks and centring must be done through styles, not by hand.
3. A table of contents that does not link
A list of chapter names that is just typed text is not a table of contents, it is decoration. A real e-book table of contents links each entry to its chapter, and Kindle also expects a logical navigation structure behind the scenes. Readers notice the instant that tapping a chapter does nothing.
The pattern behind all three: every e-book mistake is the same mistake in a different coat. Treating a reflowable e-book as if it were a printed page. Once you stop hand-placing things and let structure do the work, they all vanish at once.
Print mistakes: the ones Amazon rejects
4. Fonts that are not embedded
The most frequent print rejection. If your fonts are not embedded in the PDF, the printer cannot guarantee they exist on its end, so it refuses the file outright. Every font used anywhere in the interior must be embedded in the exported PDF. It is a setting at export time, and skipping it is the whole difference between approved and rejected.
5. Wrong page size or missing margins
Print books have a trim size, the physical dimensions of the finished book, and your PDF page size must match it exactly. Just as important is the inner margin, the gutter. Text set too close to the spine disappears into the binding. KDP has minimum margins that scale with page count, and a longer book needs a wider gutter, because a thicker spine swallows more of the inner edge.
6. Cover bleed and spine width errors
The cover is where most first-time print files die. Anything that reaches the edge of the page needs bleed, a few extra millimetres that get trimmed off, so no white slivers appear after cutting. And the spine width is not a guess, it is calculated from your exact page count and paper type. A spine sized for the wrong page count prints your title crooked or wrapped onto the front.
7. Low-resolution images
An image that looks crisp on screen can be far too coarse for print. Screens forgive, ink does not. Interior images and especially the cover need to meet the printer's resolution requirement, typically 300 dots per inch at final print size. An image pulled from a website is almost always too low.
The pre-upload checklist
Run this before you ever click publish, and most rejections never happen.
- E-book: published from EPUB, linked table of contents, no manual tabs or blank-line page breaks, checked in the KDP previewer on both phone and tablet views.
- Print interior: PDF page size equals trim size, fonts embedded, gutter margin correct for the page count, images at 300 dpi.
- Cover: correct bleed, spine width matched to final page count and paper, all text safely inside the trim edge, 300 dpi.
- Both: a test purchase of your own book after approval, opened on a real device, before you tell a soul it exists.
Skip the formatting fight: most of these errors come from hand-building files that were never meant to be built by hand. EPOS-AI exports your finished manuscript straight to clean EPUB, Word and print-ready PDF, with embedded structure and a proper linked table of contents, so the common KDP rejections never arise. For the Swiss-specific side, tax and payout, see our German guide to publishing on Amazon KDP.
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Frequently asked questions
Why did Amazon KDP reject my book file?
The most common causes are fonts that are not embedded in a print PDF, incorrect page size or missing bleed on covers, images below the required resolution, and a table of contents that does not link correctly. KDP flags these during review, and each has a specific fix.
What is the best file format for a Kindle e-book?
EPUB is the recommended and most reliable format for Kindle e-books. It reflows to any screen size, supports a linked table of contents, and avoids the layout problems that come from uploading a word processor file directly.
Do I need bleed on my KDP print book?
You need bleed only if images or backgrounds extend to the edge of the page. For a text-only interior, no bleed is required. The cover, however, must always include the correct bleed and match the spine width calculated from your page count and paper type.