Formatting for KDP & IngramSpark Upload

Upload rejections are the most common reason a book launch gets delayed. Not editing problems. Not cover issues. Formatting — the file itself doesn’t meet the printer’s specifications, and the system bounces it back with an error message that may or may not explain what went wrong.

Both KDP Print and IngramSpark accept PDF files for print interiors and covers. Both have specific requirements for page size, margins, bleed, resolution, color space, and font embedding. And both will reject files that don’t comply — sometimes silently, sometimes with cryptic error codes.

This guide covers every specification you need to format, export, and upload a print-ready interior and cover for both platforms. Follow it and your files will pass on the first upload.

Interior File: The Basics

Your interior file must be a single PDF containing every page of your book — front matter, body text, and back matter. No spreads. No facing pages. Single pages, in order, from page one to the last page.

File format: PDF (PDF/X-1a:2001 is the safest standard for both platforms)

Color mode:

• Black-and-white interiors: Grayscale or black-only
• Color interiors: CMYK (not RGB — screen colors don’t translate to print)

Resolution: All images must be at least 300 DPI at their printed size. A photo that looks sharp on screen at 72 DPI will print as a blurry mess. If you’re including photographs, illustrations, or graphics, verify their resolution before export.

Font embedding: All fonts must be embedded in the PDF. If a font isn’t embedded, the printer substitutes a default font — and your carefully designed interior turns into Courier. Every major design application (InDesign, Affinity Publisher, Word) has a font-embedding option in its PDF export settings. Turn it on. Verify it after export.

Page Size and Trim

Your interior PDF page size must match your chosen trim size exactly. Not approximately. Not rounded. Exactly.

If your trim size is 6 × 9 inches:

• Without bleed: page size = 6 × 9 in
• With bleed: page size = 6.125 × 9.25 in (KDP) or 6.125 × 9.25 in (IngramSpark)

The bleed area is a 0.125-inch extension on three sides (top, bottom, and outside edge) that allows ink to print to the very edge of the page. If your interior has elements that touch the page edge — background colors, full-width images, decorative borders — you need bleed. If your interior is text-only with standard white margins, you don’t.

Common trim sizes and their bleed dimensions:

The bleed extends 0.125 in on the top, bottom, and outside edge — but not on the inside (spine) edge. The spine edge has no bleed because it’s bound into the book.

Margins

Margins keep your text safely away from the trim edge and the spine. If margins are too narrow, text gets cut off during trimming or disappears into the gutter where pages meet the spine.

Minimum margins for KDP Print:

IngramSpark minimum margins: 0.5 in on all sides for most trim sizes, with gutter increasing for higher page counts. IngramSpark’s specifications are slightly more generous than KDP’s minimums.

Recommended margins (for readability, not just compliance):

• Inside (gutter): 0.75 in for books under 300 pages, 0.875 in for 300+
• Outside: 0.5 in
• Top: 0.5 in (or 0.75 in if using running headers)
• Bottom: 0.625 in

These are wider than the minimums. That’s intentional. Minimum margins pass the upload check but produce books that feel cramped. Professional books use generous margins that give the text room to breathe and keep the reading experience comfortable.

Page Count Requirements

Both platforms require an even total page count. If your content ends on an odd page, add a blank page at the end to make the total even.

KDP Print:

• Minimum: 24 pages (paperback), 75 pages (hardcover)
• Maximum: 828 pages (white paper), 776 pages (cream paper), 550 pages (hardcover)

IngramSpark:

• Minimum: 18 pages
• Maximum: 1,200 pages (varies by trim size and paper stock)

Page count includes everything — half-title, title page, copyright page, dedication, table of contents, body, acknowledgments, about the author, and any blank pages.

Front Matter Order

The standard front matter sequence for a professionally formatted book:

1. Half-title page — Title only, no author name, no subtitle
2. Also by (optional) — List of other books by the same author
3. Title page — Full title, subtitle, author name, publisher imprint
4. Copyright page — Copyright notice, ISBN, edition info, printer credits, permissions
5. Dedication (optional)
6. Epigraph (optional) — A quote that sets the tone
7. Table of contents (nonfiction) — Fiction typically omits this
8. Foreword (optional) — Written by someone other than the author
9. Preface (optional) — Written by the author about the book
10. Acknowledgments (optional) — Can also go in back matter

Front matter pages traditionally use lowercase Roman numerals (i, ii, iii, iv…). Body text starts at Arabic numeral 1. Most formatting tools let you set up separate page number sequences for front and body sections.

Back Matter Order

1. Acknowledgments (if not in front matter)
2. Appendices (nonfiction)
3. Glossary (if applicable)
4. Bibliography / Works Cited (nonfiction)
5. Index (nonfiction reference works)
6. About the Author
7. Also by the Author (if not in front matter)
8. Newsletter signup CTA (optional but recommended)

Typography Standards

Body text:

• Serif font for print (Garamond, Minion Pro, Palatino, Caslon, Baskerville)
• Size: 10pt to 12pt depending on the font’s x-height and the trim size
• Leading (line spacing): 120% to 145% of the font size — 11pt text with 14pt leading is standard
• Justified alignment with hyphenation enabled

Chapter headings:

• Clearly differentiated from body text — larger size, different weight, or different font
• Start each chapter on a new page (right-hand page for formal layouts, any page for casual ones)
• Drop the first line of each chapter: use a drop cap, small caps, or an ornamental break

Paragraph formatting:

• First-line indent: 0.2 in to 0.3 in (use the paragraph style, not the Tab key)
• No indent on the first paragraph after a heading or scene break
• No extra space between paragraphs in fiction — use indents only
• Nonfiction may use block paragraphs (no indent, space between) depending on style

Widows and orphans: A widow is the last line of a paragraph stranded at the top of a new page. An orphan is the first line of a paragraph stranded at the bottom of a page. Both look unprofessional. Most layout applications have widow/orphan controls — enable them. Manual review is still necessary for edge cases.

Exporting a Print-Ready PDF

From Adobe InDesign

1. File → Export → Adobe PDF (Print)
2. Preset: [PDF/X-1a:2001] or create a custom preset
3. General: Pages (not Spreads), All Pages
4. Compression: Bicubic Downsampling at 300 DPI for color/grayscale, 1200 DPI for monochrome
5. Marks and Bleeds: No printer marks. Use document bleed settings (0.125 in on three sides, 0 on spine side)
6. Output: Color conversion to Destination, Destination: US Web Coated (SWOP) v2 for CMYK interiors, or Dot Gain 20% for grayscale
7. Advanced: Subset fonts when percent of characters used is less than 100%

From Affinity Publisher

1. File → Export → PDF
2. PDF preset: PDF/X-1a:2001
3. Pages: All Pages, export as individual pages (not spreads)
4. More: Include bleed (set to 0.125 in on non-spine edges)
5. Color: CMYK for color interiors, Grayscale for B&W
6. Rasterize: DPI 300
7. Verify font embedding in the export confirmation

From Microsoft Word

Word is not a professional typesetting tool, but many indie publishers use it. If you must export from Word:

1. Page Setup: Set page size to your exact trim size (not Letter, not A4 — your trim size)
2. Margins: Set all four margins per the specifications above
3. Save As → PDF
4. Important: Word’s PDF export does not support bleed. If your interior requires bleed (elements touching the page edge), you need to use InDesign, Affinity Publisher, or a dedicated PDF tool.
5. Important: Word embeds fonts by default in its PDF export, but verify by opening the PDF in Acrobat and checking File → Properties → Fonts. Every font should show “(Embedded)” or “(Embedded Subset).”

Cover File Specifications

The cover is a separate PDF file from the interior. It’s a single page containing the front cover, spine, and back cover as one continuous image.

Both platforms provide cover template calculators. Enter your trim size, page count, and paper type, and the calculator generates a template with exact dimensions including spine width, bleed, and safe zones. Always download and use the template — never guess at cover dimensions.

Key cover specifications:

Spine width depends on page count and paper stock. Both KDP and IngramSpark calculate this for you in their template tools. Our Spine Width Calculator can also generate this value.

Platform-Specific Differences

KDP Print Upload

• Accepts PDF for interior and cover
• Interior file must match trim size exactly (with or without bleed as applicable)
• Cover can be uploaded as PDF, JPEG, PNG, or TIFF — PDF is preferred
• KDP offers a Cover Creator tool if you don’t have design software (basic but functional)
• Preview tool: KDP’s online previewer shows a rendered version of your book — check it carefully before approving
• File size limit: 650 MB for interior, 40 MB for cover

IngramSpark Upload

• Accepts PDF only for interior and cover
• PDF/X-1a:2001 is required — other PDF standards may be rejected
• IngramSpark’s preflight check is stricter than KDP’s — files that pass KDP may fail IngramSpark
• Cover must include spine and back cover as a single PDF (no front-cover-only uploads)
• File size limit: 2 GB for interior, 2 GB for cover
• IngramSpark charges for file revisions after initial upload — get it right the first time

Common Upload Rejections and Fixes

“Page size does not match trim size.” Your PDF page dimensions don’t match the trim size you selected during setup. Open the PDF in Acrobat, check Document Properties → Page Size, and compare to your selected trim size (with or without bleed).

“Fonts not embedded.” At least one font in your PDF is referenced but not embedded. Open the PDF in Acrobat, go to File → Properties → Fonts, and look for fonts without “(Embedded)” next to them. Re-export with font embedding enabled.

“Images below minimum resolution.” One or more images in your interior are below 300 DPI at their printed size. Identify the low-resolution images, replace them with higher-resolution originals, and re-export. Upscaling a low-resolution image in Photoshop does not fix the problem — it just makes a blurry image larger.

“Bleed required but not present.” You selected “bleed” during setup but your PDF doesn’t extend past the trim line. Either add bleed to your layout and re-export, or change your setup to “no bleed” if your interior doesn’t have elements touching the page edge.

“Spine text extends into unsafe zone.” Your spine text is too close to the edge of the spine area. Reduce the spine text size or reposition it within the safe zone indicated on the cover template.

“Color space mismatch.” Your interior or cover uses RGB color but the platform expects CMYK. Convert all colors and images to CMYK before exporting. IngramSpark is stricter about this than KDP.

Pre-Upload Checklist

Before you upload to either platform, verify every item:

• PDF page size matches trim size exactly (with bleed if applicable)
• All fonts are embedded
• All images are 300 DPI or higher at print size
• Color space is correct (CMYK for color, Grayscale for B&W)
• Margins meet or exceed platform minimums
• Gutter margin is appropriate for your page count
• Total page count is even
• Front matter and back matter are in correct order
• Page numbers are correct and consistent
• Chapter openings start on new pages
• No widows or orphans in body text
• Cover PDF includes front, spine, and back as a single page
• Cover dimensions match the platform’s template exactly
• Spine width is calculated for your specific page count and paper stock
• Barcode area on back cover is clear
• Cover bleed extends 0.125 in on all four edges

Run through this list before every upload. It takes five minutes and saves days of rejection-resubmission cycles.

Related Resources

• Print Specifications Guide — All trim sizes, bindings, paper stocks, and finishes that determine your formatting requirements.
• Color Printing Options & Pricing — If your interior uses color, the ink type and paper stock affect your file preparation.
• Page Estimator — Estimate your final page count based on word count, trim size, and font settings.

Caliana Press publishes fiction, nonfiction, textbooks, and educational content across all genres and formats.

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