How to Format a Book for KDP Print (2026)

KDP Print powers every “Print on Demand” paperback sold on Amazon — debut novels to cookbooks. Unlike IngramSpark, which runs your file through a strict trade preflight, KDP accepts everything from a Word document to a polished PDF — and its automated checks are gentler. Gentler, not optional: upload a manuscript with wrong margins, missing bleed, or unembedded fonts and KDP will still reject it. Here is how to format a book for KDP print without rejections: the exact trim sizes, margin tables, bleed rules, PDF settings, and cover math KDP requires in 2026.

By the end of this guide, you will know which trim size and paper stock to choose, how to read KDP’s required margins from its page-count table, when bleed is required, how to export a clean PDF with embedded fonts, how to use the KDP cover calculator for exact spine width, and how to fix the six rejection errors first-time authors hit most.

Why KDP Print Is More Forgiving Than IngramSpark — and Where the Forgiveness Ends

KDP Print is Amazon’s print-on-demand arm, built to turn your manuscript into a paperback on Amazon with the least friction possible. Where IngramSpark demands PDF/X-1a and rejects files with live transparency, KDP will accept a Word DOCX, run it through its own converter, apply a basic template, and still produce a sellable book. For a first-time novelist, that is a gift — you can go from manuscript to live paperback in a single day.

But “forgiving” is not “anything goes.” KDP runs automated checks on every upload: margins below the minimum for your page count, art that touches the trim without bleed, unembedded fonts, low-resolution images, and cover text outside the safe zone all trigger warnings or rejections. And unlike IngramSpark’s detailed preflight report, KDP’s feedback can be terse — a red error line and a help link. The checklist below closes those gaps, so you upload once and approve with confidence. If bookstore distribution is on your roadmap too, read our IngramSpark print formatting guide alongside this one — the two platforms share most of the math, but IngramSpark’s stricter side is the one to satisfy first.

Choosing Your KDP Paperback Trim Size

Your trim size is the finished size of each printed page, and it locks everything else: margins, cover dimensions, and spine width all derive from it. KDP paperbacks must be between 24 and 828 pages, and you select the trim when you create the title — changing it later means a new title setup, so choose deliberately now.

The 6 x 9 inch trim is the default for novels, memoirs, and general nonfiction: economical to print, comfortable to hold, and roomy enough for chapter ornaments. Two related choices matter just as much as the dimensions themselves.

First, bleed or no bleed. If no art touches the page edge, choose “no bleed” and build the document at the exact trim size. If any image or design element runs to the edge, choose “bleed” and add 0.125 inches to the width and height (a 6 x 9 book becomes 6.125 x 9.25), extending the art into that added zone.

Second, pick from KDP’s supported trims rather than inventing one. The most popular choices:

KDP Paper Types: White vs Cream vs Premium Color

White paper is KDP’s crisp, bright default stock — and the only stock for color: standard color interiors only print on white paper. Choose it for text-heavy books where contrast matters, and for any book with color at all.

Cream paper is the classic novel stock: warm-toned and easier on the eyes over long sessions. Choose cream for novels, memoirs, and narrative nonfiction with black-and-white interiors — cream is unavailable for color interiors, and it runs slightly thicker per page, which widens your spine.

Premium color is KDP’s top-tier stock — heavier paper with richer reproduction — for children’s books, cookbooks, photography, and art books, where color quality sells the book. Standard color is the cheaper alternative, adequate for charts, diagrams, and light illustration.

Lock your paper choice before you build the cover: it changes both the spine width calculation and the print cost, which are baked into the cover file and your pricing.

Bleed, Margins, and Gutter: KDP’s Exact Numbers

Bleed is extra artwork extending past the trim edge so the guillotine never leaves a white sliver. When you format a book for KDP print, the bleed rule is simple: any element that touches the page edge needs 0.125 inches of bleed on that side. Select “bleed” in your title setup and extend the art 0.125 inches past the trim on every side it touches. Never include printer’s marks or crop marks in the file — KDP adds its own, and yours will cause problems.

Margins are KDP’s non-negotiable table. The inside (gutter) margin scales with page count because perfect binding curves pages into the spine; outside, top, and bottom margins stay at 0.25 inches minimum. With bleed selected, all four margins must be at least 0.375 inches.

Two more rules: keep headers, footers, and page numbers at least 0.25 inches from the trim on no-bleed pages, and mirror your margins so the wider gutter always falls on the binding side. Set these numbers before you lay out a single page — fixing margins after the interior is finished means re-flowing the entire book.

Interior File Specs: Fonts, Images, and Page Furniture

Build the interior for print first and adapt for ebook second — our print vs ebook formatting comparison explains the trade-offs in detail. Every font must be embedded and subset in the PDF: use licensed fonts with full character sets, a readable serif like Garamond or Minion Pro at 10.5 to 11.5 points for body text. KDP’s converter is less fussy than IngramSpark’s preflight, but unembedded fonts still shift or substitute in the printed copy — never leave font embedding to chance.

Images must be 300 DPI at their final print size; line art and fine maps need 600 DPI or more. KDP accepts RGB images and converts them itself, but for color-critical work convert to CMYK before you export and proof the result — automatic conversion shifts saturated reds and deep blues. Caption every figure and keep it anchored near its first mention.

Page furniture should follow the trade order: title page, copyright, dedication, table of contents, then chapters, then appendices, notes, and about the author. Our appendix and glossary formatting guide covers the back-matter mechanics in detail, and our military sci-fi formatting guide shows a complete worked example of a print-ready interior with back matter.

Exporting a Print-Ready PDF for KDP

KDP does not require PDF/X-1a — a clean, well-built PDF passes its checks: single pages (never spreads), all fonts embedded and subset, no printer’s marks, and the document built at the exact trim size (plus bleed, if selected). Export from InDesign, Affinity Publisher, or Word’s PDF engine, and run this checklist before you upload:

• All fonts embedded and subset, no missing glyphs
• Single pages, never printer’s spreads
• 0.125 inch bleed on all sides where art touches the edge (bleed titles only)
• No printer’s marks, crop marks, or color bars
• Images at 300 DPI at final size
• Page count final — your cover spine math depends on it
• Interior reviewed in KDP’s online previewer, page by page

The KDP Cover Calculator and Spine Width

KDP takes the cover as a single one-piece PDF — back cover, spine, and front cover as one spread, with 0.125 inches of bleed on all four outer edges. The fastest route is the KDP cover calculator in your dashboard: enter trim size, page count, paper type, and interior ink, and it returns a full-size template with the spine area marked. Build on that template and the math is already right.

Spine width is page count times the paper’s per-page thickness. KDP’s figures:

Two cover rules trip up beginners. Books under 100 pages get no spine text — the spine is too narrow to hold it — so keep the spine blank and ignore the template’s spine zone. And leave the lower-right corner of the back cover empty: KDP places the barcode there. If your manuscript grows after the cover is built, re-run the calculator and re-export the cover — a spine that no longer matches the page count is a guaranteed rejection.

Title Setup: ISBN, Imprint, Metadata, and Pricing

Every format needs its own ISBN: one for the paperback, one for the hardcover, one for the ebook. KDP offers a free ISBN — convenient, but it lists Amazon as the publisher and ties the title to KDP. Buy your own from your national agency (Bowker in the US) and you can use the same paperback ISBN on both KDP and IngramSpark: an ISBN identifies the edition, not the printer, and one ISBN per format across platforms is correct.

Complete the metadata Amazon actually uses: up to three BISAC categories, seven keyword slots, a description written for readers rather than stuffed with keywords, and a competitive list price. On pricing: KDP pays 60 percent of list price minus print cost for paperbacks sold on Amazon (40 percent through expanded distribution), so run your trim and page count through KDP’s royalty calculator first — a thick color book can carry a print cost that eats the margin you expected.

Common Rejection Reasons and How to Fix Them

Nearly every KDP rejection traces back to six fixable problems — here is each one and the exact fix.

Margins below the minimum. The automated check found text inside the minimum margin zone for your page count. Fix: look up your page count in the margin table above, widen the inside and outside margins, and re-export.

Missing bleed on full-bleed art. The art touches the trim but the title was set to no bleed. Fix: change the title setup to bleed, extend the art 0.125 inches past the trim, and re-upload both files.

Fonts not embedded. The check found text referencing fonts that are not inside the PDF. Fix: re-export with font embedding and subsetting turned on, and confirm no “do not embed” exceptions are set.

Low-resolution images. An image falls below KDP’s resolution floor at its printed size. Fix: replace it with a higher-resolution source or shrink it on the page until it genuinely measures 300 DPI — never upscale, which only fakes the number.

Spine width mismatch. The cover’s spine does not match the final interior page count. Fix: recount the pages after your last edit, re-run the cover calculator, and re-export the one-piece cover.

Cover text outside the safe zone. Type sits where the trim or fold will cut it. Fix: rebuild on the calculator template and keep all text inside the marked safe areas.

Conclusion: Upload Once, Approve with Confidence

Once you know how to format a book for KDP print, the upload stops feeling like a gamble: lock the trim size, read the margin table for your page count, set bleed at 0.125 inches where art touches the edge, embed every font, keep images at 300 DPI, build the cover from the calculator template, and preview everything before you approve. Do that and your paperback goes live on the world’s biggest bookstore the first time.