Books are printed on oversized sheets and then trimmed down to your trim size. Trimming blades drift slightly — a hair here, a hair there. If a photo, a background color, or a piece of art is supposed to run right up to the edge of the finished page, your file has to include a little extra art beyond the edge, so a drifting blade cuts through color instead of leaving a thin white sliver. That extra art is the bleed.
What KDP is actually saying
The rule is 0.125″ of bleed — and where it goes depends on the file:
- Interior: bleed goes on the top, bottom, and outside edges of each page. Never on the inside (binding) edge — that edge gets glued into the spine. If even one page in your book has edge-to-edge art, the whole interior file must be built at bleed size: trim width + 0.125″, trim height + 0.25″. A 6×9″ book becomes 6.125×9.25″; an 8.5×11″ book becomes 8.625×11.25″.
- Cover: the wraparound cover always includes 0.125″ of bleed on all four outer edges, wrapped around the back cover, spine, and front cover.
- Text-only books don't need bleed at all. If nothing touches an edge, upload at exact trim size and this error never appears. If KDP is demanding bleed from a book you think is text-only, some element on some page is touching an edge — a stray shape, a full-page background, a header rule that runs wide.
Bleed elements vs live elements — the distinction that fixes everything: bleed elements are backgrounds and art that are meant to be cut through; they should run all the way into the bleed. Live elements are text, faces, page numbers — anything you'd miss if it got trimmed; they must stay inside the margins, well away from the edge. Stretching the background out to the bleed while the text sits near the edge earns you this error and the margin error at the same time.
Check it yourself
- Measure your PDF's page size. Open it in Acrobat or Acrobat Reader — File > Properties shows the page size in inches. Is it your trim size, or your trim size plus bleed? Match that against what your book needs.
- Flip through and look for edge-touchers. Any color or image reaching the top, bottom, or outside edge of any page means the whole file needs bleed dimensions.
- Check your export dialog. Most tools have a bleed option that defaults to off. Designing with bleed guides on screen and then exporting without them is the single most common cause of this rejection.
- On the cover, check all four edges — and remember the cover's total width also depends on your spine, which depends on your final page count.
Don't want to measure this yourself? Send us your interior and cover files and we'll run the full 13-point check — bleed, spine, margins, fonts, all of it — and tell you in plain English what's wrong. The check is free. Get the free check →
How to fix it
In Canva
Turn on File > View settings > Show print bleed, then drag every background and edge-touching image out to the bleed line — not just to the trim edge. Download as PDF Print with “Crop marks and bleed” checked. Without that checkbox, Canva exports at trim size and KDP rejects the file no matter how it looked on screen.
In InDesign
File > Document Setup: set bleed to 0.125″ on all sides. Extend art past the trim edge to the bleed guide. Export with “Use Document Bleed Settings” ticked.
In Word or Pages (Mac)
Neither has a true bleed switch. The workaround is to set the page size itself to the bleed dimensions (e.g. 6.125×9.25″ for a 6×9″ book), place backgrounds so they run to the very edge of that larger page, and keep all text inside the normal margins. It works, but it's fiddly — which is why full-bleed interiors are usually built in a design tool instead.
On the cover
Build the wraparound at full size: 0.125″ bleed + back cover width + spine width + front cover width + 0.125″ bleed, and trim height + 0.25″. KDP's own cover calculator and template generator will give you the exact numbers for your book — use them rather than estimating.
The honest limit
Bleed can't be invented after the fact. If your background image simply ends at the trim line, software can only stretch or mirror the edge pixels to fake the extra 0.125″ — acceptable on a cloudy sky or a texture, visibly wrong on a face or a detailed illustration. The real fix is in the source file: a bigger background, art that extends past the edge, then a fresh export. If your book truly has nothing touching an edge, the fix is the opposite: tell KDP the book has no bleed and upload at exact trim size — just be sure that stray element is found first.
Or send us the files — the check is free
Email your interior and cover PDFs and we'll tell you exactly what's wrong — in plain English, free, within 48 hours. If it does need fixing, the by-hand fix is $19 and we redo it free if KDP rejects it for a formatting issue we were hired to fix. We rebuild files to be compliant with KDP's published spec — that's the promise we can keep.