What Is KDP Print?
KDP Print is Amazon's print-on-demand (POD) service, integrated into Kindle Direct Publishing. It replaced CreateSpace in 2018. When a customer orders your paperback, Amazon prints a single copy, ships it, and pays you the difference between the list price and printing cost.
There are no upfront costs, no minimum orders, and no inventory to manage. You upload a PDF interior and a cover file, and Amazon handles printing, distribution, and fulfillment. Your paperback appears on Amazon alongside your ebook (if you have one), and customers can choose their preferred format.
KDP Print paperbacks are available in most Amazon marketplaces worldwide - US, UK, Germany, France, Spain, Italy, Japan, Canada, Australia, and others. You can also enable Expanded Distribution to make your book available to bookstores, libraries, and online retailers beyond Amazon, though margins are thinner on those channels (40% instead of 60%).
The entire process - from uploading files to having a live paperback on Amazon - takes about 3–5 business days for KDP's review. There is no application or approval process. Anyone with an Amazon account can publish.
Why Publish a Paperback (Not Just an Ebook)
Many self-publishers start with a Kindle ebook and never create a paperback. That is a mistake. Here is why adding a paperback matters, even if most of your sales are digital:
Higher perceived value
A physical book signals credibility in a way a Kindle file does not. If you are using your book for client acquisition, speaking engagements, or professional authority, a paperback you can hand to someone is worth more than a link to an ebook. Business and self-help authors routinely report that a physical book opens doors that an ebook cannot.
Higher price point
Paperbacks sell for $12.99–$19.99 in most non-fiction categories, compared to $2.99–$9.99 for ebooks. Even though printing costs eat into your margin, the higher list price means comparable or better earnings per sale. A $14.99 paperback earns roughly $5.62 after printing - similar to a $9.99 ebook at 70% royalty ($6.99).
Amazon product page boost
When you link a paperback to your Kindle ebook, the product page shows both format options. This gives customers a choice (some people strongly prefer physical books) and makes the listing look more established. Books with multiple formats tend to rank slightly better in Amazon's algorithm because the combined sales velocity is higher.
Gift purchases
Paperbacks are bought as gifts far more often than ebooks. During holiday seasons, books with a paperback option see a measurable sales bump from gift buyers who prefer wrapping a physical object.
No added writing work
If you already have the ebook, the paperback is the same content. The work is formatting (margins, trim size, cover wrap) - not writing. With Inkfluence AI's KDP export mode, the formatting work takes about 5 minutes.
Choosing Your Trim Size
Trim size is the finished dimensions of your printed book. It determines page layout, margins, spine width, and the overall feel of the book in hand. KDP supports dozens of trim sizes, but most books use one of these:
| Trim Size | Inches | Centimeters | Best For |
|---|---|---|---|
| 6" × 9" | 6 × 9 | 15.24 × 22.86 | Non-fiction, self-help, business, how-to (most popular on KDP) |
| 5.5" × 8.5" | 5.5 × 8.5 | 13.97 × 21.59 | Fiction, memoirs, lighter non-fiction, literary works |
| 5" × 8" | 5 × 8 | 12.7 × 20.32 | Mass-market fiction, devotionals, pocket-sized guides |
| 5.83" × 8.27" (A5) | 5.83 × 8.27 | 14.81 × 21.01 | International standard, workbooks, journals |
| 8.5" × 11" | 8.5 × 11 | 21.59 × 27.94 | Workbooks, manuals, textbooks, image-heavy guides |
| 6" × 9" (landscape) | 9 × 6 | 22.86 × 15.24 | Children's books, photography, cookbooks |
The safest choice: 6" × 9" for non-fiction and 5.5" × 8.5" for fiction. These are the most common sizes on Amazon, match reader expectations, and have the widest availability across all printing options and marketplaces.
Once you publish with a specific trim size, you cannot change it without creating a new edition. Choose carefully. If unsure, order a proof copy at your preferred size before publishing.
Inkfluence AI supports five trim sizes in its KDP export mode: Trade (6×9), Digest (5.5×8.5), Pocket (5×8), A5 (5.83×8.27), and US Letter (8.5×11).
Margins and Gutter Settings
Margins determine how much white space surrounds your text on each page. The gutter margin is the inside margin - the side closest to the spine where the pages are bound together.
Why the gutter matters
When you open a physical book, pages curve toward the binding. The thicker the book, the more the pages curve, and the harder it is to read text near the spine. Wider gutter margins push text away from the binding so every line remains readable.
KDP minimum gutter margins
| Page Count | Inside (Gutter) Margin | Outside Margin (min) | Top/Bottom (min) |
|---|---|---|---|
| 24–150 pages | 0.375" (9.5 mm) | 0.25" (6.4 mm) | 0.25" (6.4 mm) |
| 151–300 pages | 0.5" (12.7 mm) | 0.25" | 0.25" |
| 301–500 pages | 0.625" (15.9 mm) | 0.25" | 0.25" |
| 501–700 pages | 0.75" (19.1 mm) | 0.25" | 0.25" |
| 700+ pages | 0.875" (22.2 mm) | 0.25" | 0.25" |
These are minimums. Most professionally typeset books use margins larger than the KDP minimum - typically 0.5" outside and 0.75" top/bottom. Inkfluence AI uses 0.5" outside and 0.75" top/bottom, well above KDP's minimums, for a comfortable reading experience.
Asymmetric (mirrored) margins
Physical books have mirrored margins: on left-hand (even) pages the gutter is on the right side, and on right-hand (odd) pages the gutter is on the left. This ensures the wider margin is always on the binding side. Inkfluence AI's KDP export applies this automatically using CSS @page :left and @page :right rules.
For a visual breakdown of margin zones and a step-by-step formatting walkthrough, see our guide to creating print-ready PDF books with AI.
Bleed: When You Need It and When You Don't
Bleed is extra space added beyond the trim line that gets cut off during printing. It prevents white edges from appearing when images or colors extend to the page edge.
When you need bleed
- Images that extend to the page edge (full-bleed photos, background colors).
- Colored page backgrounds or decorative borders that touch the edge.
- Photography books, art books, and heavily illustrated guides.
When you don't need bleed
- Text-only books (fiction, non-fiction, self-help, business).
- Books where all images have white space around them.
- Workbooks with contained elements (tables, boxes, worksheets).
If you enable bleed on KDP, you must add 0.125" (3.2 mm) to the top, bottom, and outside edge of every page. Your PDF dimensions increase accordingly. For a 6×9 book with bleed: 6.125" × 9.25".
Most books do not need bleed. Inkfluence AI exports without bleed, which is correct for the vast majority of text-based books. If your book needs full-bleed images, you may need to adjust the PDF in a desktop publishing tool after export.
Interior Formatting Requirements
KDP has specific requirements for the interior PDF that differ from a standard document PDF. Getting these right is the difference between a book that looks professionally typeset and one that looks like a printed-out Word document.
File requirements
- Format: PDF only (not DOCX, not EPUB). KDP accepts only PDF manuscripts for paperbacks.
- No cover page: The interior PDF must not include a cover image. KDP adds the cover separately from the cover file you upload. If your interior starts with a cover, it will be printed twice - once as the physical cover, once as the first interior page.
- Fonts embedded: All fonts must be embedded in the PDF. Missing fonts are substituted with system defaults (often Courier or Times), which ruins your layout. Inkfluence AI embeds all fonts automatically.
- Color space: RGB for color interiors, grayscale or RGB for black-and-white. KDP converts to CMYK for printing.
- Image resolution: Minimum 300 DPI for print quality. Images that look fine on screen (72-150 DPI) will look pixelated in print. Check this before exporting.
- Page count: Minimum 24 pages, maximum 828 (B&W) or 500 (color). Page count includes all interior pages: front matter, content, and back matter.
Front matter order
The first pages of your interior should follow this standard order. Readers and reviewers notice when front matter is out of sequence:
- Half title page (optional) - Book title only, no subtitle or author name. Used in traditional publishing to create a sense of occasion. Most self-publishers skip this.
- Title page - Book title, subtitle, author name. This is expected in every professionally published book.
- Copyright page - Copyright notice, publication year, ISBN if applicable, "All rights reserved," and any disclaimers. Always on the verso (back) of the title page.
- Dedication (optional) - One line or a short paragraph. Keep it brief.
- Table of contents - Optional for fiction, essential for non-fiction. List chapter titles with page numbers.
- Foreword or preface (optional) - A foreword is by someone other than the author; a preface is by the author.
Inkfluence AI generates title page, copyright page, and table of contents automatically in the KDP export. Dedication and foreword can be added as content before the first chapter.
Typography for print
Print typography has different requirements than screen typography. Here are the conventions that professional typesetters follow:
| Element | Recommended | Notes |
|---|---|---|
| Body font | Serif (Garamond, Georgia, Palatino, Caslon) | Serif fonts are easier to read in print. Sans-serif works for technical books. |
| Body size | 10.5–12pt | 11pt is the sweet spot for 6×9 books. Larger (12pt) for older audiences. |
| Line spacing | 1.3–1.5× body size | 1.4× is most common. Tighter (1.3×) for technical; looser (1.5×) for self-help. |
| Heading font | Sans-serif or bold serif | Contrast with body font. Chapter titles typically 18–24pt. |
| Paragraph style | First-line indent (0.3–0.5") | Traditional. Alternative: block paragraphs with 6–10pt space between. |
| Justification | Full justification | Standard for print. Left-aligned is acceptable for technical/academic. |
| Widows/orphans | Avoid | A widow is a single line at the top of a page; an orphan is a single line at the bottom. Both look amateur. |
Chapter starts
New chapters should start on a new page. In traditional publishing, chapters start on recto (right-hand, odd-numbered) pages, which means inserting a blank verso page when needed. This is standard for fiction and literary non-fiction. For practical non-fiction, starting on the next available page (recto or verso) is acceptable and saves pages.
Headers, footers, and page numbers
- Page numbers - Essential. Position them at the bottom center or at the outside edge of each page (bottom-left on left pages, bottom-right on right pages).
- Running headers - Optional but professional. Common pattern: book title on left pages, chapter title on right pages.
- Front matter numbering - Front matter (copyright, TOC) traditionally uses Roman numerals (i, ii, iii). Body content starts at page 1. Some self-publishers skip Roman numerals and start numbering from the first chapter.
- Chapter title pages - Typically have no header or page number (the page number is implied but not printed). This is a traditional convention.
Paperback Cover Requirements
A paperback cover is a full wrap that includes the front cover, spine, and back cover in a single image file.
Cover specifications
- Format: PDF (preferred) or JPEG/TIFF.
- Resolution: 300 DPI minimum.
- Color space: CMYK recommended, RGB accepted (Amazon converts).
- Dimensions: Calculated from trim size + spine width + bleed. Use KDP's Cover Calculator.
Cover Calculator
KDP provides a Cover Calculator tool at kdp.amazon.com/cover-calculator that generates a PNG template with exact dimensions for your book. Enter your trim size, page count, and paper type to get:
- Total cover dimensions (width × height).
- Spine width (calculated from page count and paper type).
- Safe zones (keep important content away from the edges).
- A downloadable template to use in your design tool.
Alternative: KDP Cover Creator
If you do not have a design tool, KDP's built-in Cover Creator lets you build a full wrap from a front cover image. Upload your front cover, choose a background color or image for the back, and KDP generates the spine and back cover automatically. Inkfluence AI exports your cover as a 300 DPI PNG that you can upload directly to Cover Creator.
Calculating Spine Width
The spine is the narrow edge visible when the book sits on a shelf. Its width depends on your page count and paper type:
| Paper Type | Multiplier per Page | Example (200 pages) | Example (300 pages) |
|---|---|---|---|
| White paper | 0.002252" | 0.45" | 0.68" |
| Cream paper | 0.0025" | 0.50" | 0.75" |
Formula: spine width = page count × multiplier.
Spine text is only allowed if the spine is at least 0.5" wide (roughly 200+ pages on cream paper or 222+ pages on white). Books with thinner spines should have a blank spine.
You do not need to calculate this manually. KDP's Cover Calculator provides the exact spine width for your specific book, and the downloadable template marks the spine zone clearly.
Ink and Paper Options
KDP offers three ink-and-paper combinations. Your choice affects print quality, printing cost, and reader experience:
| Option | Paper Color | Best For | Relative Cost |
|---|---|---|---|
| Black & white - white paper | Bright white | Non-fiction, technical, business, study guides | Lowest |
| Black & white - cream paper | Warm cream | Fiction, memoirs, self-help, long reads | Low |
| Premium color - white paper | Bright white | Cookbooks, travel guides, children's books, photography | Highest (~2× B&W) |
For most books, black and white on cream paper is the best choice. The warm cream tone is easier on the eyes for extended reading and signals "real book" to readers. White paper is better for books with charts, tables, or images that need crisp contrast.
Color printing is significantly more expensive. A 200-page color book costs roughly twice as much to print as a B&W version. Only choose color if your content genuinely requires it.
Cover finish
Separately from the interior, you choose a cover finish:
- Matte: Non-reflective, soft feel, fingerprint-resistant. Preferred for literary fiction, self-help, and professional books.
- Glossy: Shiny, vibrant colors, eye-catching on shelves. Preferred for cookbooks, children's books, and image-heavy covers.
Both options use the same 80lb (220 GSM) cover stock.
ISBN Options
An ISBN (International Standard Book Number) is a unique identifier for your book. For KDP paperbacks, you have three choices:
1. Free KDP ISBN
Amazon provides a free ISBN for your paperback. The imprint is listed as "Independently Published" in book databases. This is the simplest option and has no cost. Most self-publishers start here.
2. Your own ISBN
Purchase an ISBN from your country's ISBN agency (Bowker in the US, Nielsen in the UK). Your imprint name appears in databases. This gives you more control and allows you to distribute through other channels (IngramSpark, bookstores) using the same ISBN.
3. No ISBN
Not recommended for paperbacks. Without an ISBN, your book cannot be distributed outside Amazon's own marketplace. Ebooks do not require ISBNs (Amazon uses ASINs instead).
Recommendation: Use the free KDP ISBN unless you plan to distribute through non-Amazon channels (IngramSpark, bookstores, libraries). If you later want your own imprint, you will need to create a new edition with a new ISBN. ISBNs from Bowker cost $125 for one or $295 for ten.
Pricing and Royalties
KDP paperback royalties work differently from ebook royalties. The formula is straightforward:
Royalty = (List Price × 60%) – Printing Cost
Printing cost examples (US marketplace)
| Book Specs | Printing Cost | At $12.99 | At $14.99 | At $17.99 |
|---|---|---|---|---|
| 150 pages, B&W, cream, 6×9 | ~$2.87 | $4.92 | $6.12 | $7.92 |
| 200 pages, B&W, cream, 6×9 | ~$3.37 | $4.42 | $5.62 | $7.42 |
| 300 pages, B&W, cream, 6×9 | ~$4.37 | $3.42 | $4.62 | $6.42 |
| 200 pages, color, white, 6×9 | ~$6.90 | $0.89 | $2.09 | $3.89 |
Royalty columns show earnings per sale at each list price. Printing costs are approximate and vary slightly by marketplace.
Pricing strategy
- Non-fiction: $12.99–$19.99 is the standard range. Higher prices are accepted for business, technical, and professional books.
- Fiction: $9.99–$15.99. Readers expect lower prices for novels.
- Workbooks and manuals: $14.99–$24.99. Larger formats justify higher pricing.
Always calculate your royalty before publishing. If the printing cost is too close to your planned price, you may earn less than $1 per sale. For color books, consider whether the content truly requires color or if B&W would be sufficient.
Expanded Distribution
KDP offers Expanded Distribution, which makes your paperback available to bookstores, libraries, and online retailers beyond Amazon. The royalty for Expanded Distribution is lower: (List Price × 40%) – Printing Cost. This can result in very thin margins or even negative royalties at lower price points. Set your price high enough to cover both channels.
For non-fiction priced at $14.99+, Expanded Distribution is usually worth enabling - the incremental sales from library orders and secondary retailers add up. For fiction below $12.99, the math may not work.
AI Content Disclosure Requirements
If you used AI tools to help create your book - whether for writing, editing, image generation, or translation - Amazon requires you to disclose this during the KDP upload process. This applies to both ebook and paperback uploads, and the requirement has been in place since late 2023.
What Amazon asks
During the KDP upload workflow, you will see a "Content Declaration" section that asks two questions:
- AI-generated text - Did you use AI tools to create the text content? This includes tools like Inkfluence AI, ChatGPT, Claude, Jasper, or any other AI writing assistant. If AI generated any portion of your text, select "Yes."
- AI-generated images - Did you use AI tools (DALL-E, Midjourney, Stable Diffusion, etc.) to create any images in the book, including the cover? If so, select "Yes."
Does disclosure affect approval?
No. Honest disclosure does not prevent your book from being published. Amazon publishes AI-assisted books every day. The disclosure is about transparency, not gatekeeping. What causes rejection is undisclosed AI content, spam-quality text, or content that violates KDP's content guidelines (plagiarism, misleading claims, low-quality content).
AI-assisted vs AI-generated
Amazon's policy distinguishes between content that is entirely AI-generated and content where AI assisted a human author. If you used AI to generate drafts that you then edited, restructured, and refined - that is AI-assisted. If you published raw AI output without editing - that is AI-generated. Both require disclosure, but AI-assisted content that has been meaningfully edited by a human meets Amazon's quality standards.
Inkfluence AI generates first drafts that authors are expected to edit, expand, and make their own. This is the AI-assisted model. Disclose it honestly, and focus on producing high-quality content that readers value.
For the full details - exact checkboxes, wording, edge cases, and what Amazon does with the disclosure information - see our complete guide to Amazon KDP's AI content disclosure policy. You can also review the companion 2026 policy blog breakdown for timeline context.
Export Print-Ready PDFs for KDP
Inkfluence AI's KDP export mode produces an interior PDF with automatic gutter margins and a 300 DPI cover image. Five trim sizes supported. Upload directly to Amazon.
Create Your Paperback FreeThe Upload Workflow
Here is the step-by-step process for uploading your paperback to KDP:
Step 1: Log into KDP
Go to kdp.amazon.com and sign in with your Amazon account. If you haven't set up your KDP account yet, see our Self-Publishing on Amazon KDP guide for the account setup walkthrough.
Step 2: Create a new paperback
Click "Create" in your Bookshelf and select "Paperback." If you already have a Kindle ebook, you can link the paperback to it so both formats appear on the same Amazon product page.
Step 3: Enter book details
Fill in your title, subtitle, author name, description, keywords (up to 7), and categories (up to 3). If you are linking to an existing ebook, most of these fields pre-populate.
Step 4: Upload your interior PDF
Upload the interior manuscript PDF. KDP will process it and flag any issues: missing fonts, images below 300 DPI, incorrect page size, or margin violations. Fix any errors before proceeding.
Step 5: Choose ink and paper
Select black-and-white or color interior, paper color (white or cream), and your trim size. These cannot be changed after publishing without creating a new edition.
Step 6: Upload your cover
Upload a full cover wrap PDF/JPEG, or click "Launch Cover Creator" to build one from your front cover image. KDP's Cover Creator adds the spine and back cover for you.
Step 7: Launch Previewer
Use KDP's built-in Launch Previewer to check every page: margins, text positioning, image quality, front matter, and back matter. This shows exactly what the printed book will look like. Scroll through the entire book.
Step 8: Set pricing
Choose your marketplaces and list price. KDP shows your printing cost and estimated royalty per sale in real time. Enable or disable Expanded Distribution.
Step 9: Publish
Click "Publish Your Paperback Book." Your book enters review and typically goes live within 3-5 business days. You will receive an email when it is available.
Ordering Proof Copies
Before making your paperback publicly available, order proof copies to check print quality in person.
Why proof copies matter
- Screen and print look different - colors may shift, margins may feel tighter than expected.
- Paper weight, texture, and ink density can only be evaluated in person.
- Spine alignment and cover wrap positioning may need adjustment.
- You catch issues that the digital previewer misses: font readability at actual size, image sharpness, and binding quality.
How to order
In KDP's Bookshelf, click the "..." menu next to your paperback and select "Order a proof." Proof copies are printed at cost (you pay the printing cost plus shipping, no royalty). They are stamped "Not for Resale" on the back cover.
Order at least 2 copies - one to keep and one to give to a trusted reader for feedback on the physical product.
KDP Print vs IngramSpark
KDP Print is not the only print-on-demand option. IngramSpark is the other major player, and many serious self-publishers use both. Here is how they compare:
| Feature | KDP Print | IngramSpark |
|---|---|---|
| Setup cost | Free | Free (was $49/title until 2023) |
| Amazon distribution | Direct - you control the listing | Indirect - Amazon can discount or mark as unavailable |
| Bookstore distribution | Limited (Expanded Distribution only) | Best in class - Ingram is the world's largest book distributor |
| Library distribution | Minimal | Strong - libraries order from Ingram by default |
| Returns | Non-returnable | Returnable (required for bookstore stocking) |
| Trim sizes | ~30 options | ~100+ options including custom |
| Print quality | Good (digital offset) | Comparable (same print network for many titles) |
| Hardcover | Yes (case laminate) | Yes (case laminate and dust jacket) |
| Author copies | At printing cost | At printing cost (higher base for some configurations) |
| Royalty on Amazon | 60% list price - print cost | Varies (typically lower after Ingram's cut + Amazon's wholesale discount) |
When to use both
The most common strategy among professional self-publishers is to use KDP Print for Amazon sales (where you get the best royalty and full control over your listing) and IngramSpark for everywhere else (bookstores, libraries, non-Amazon online retailers). You use your own ISBN from Bowker for both, and set IngramSpark's "Amazon" channel to off to avoid competing with your KDP listing.
When KDP alone is enough
If Amazon is your primary sales channel and you do not plan to pursue bookstore placement or library distribution, KDP Print alone is fine. Most self-publishers fall into this category. The free ISBN, zero setup cost, and 60% royalty make it the simplest and most profitable option for Amazon-focused authors.
Common Formatting Mistakes
- Including the cover in the interior PDF - KDP adds the cover from a separate file. If your interior starts with a cover image, it will be printed as a page inside the book and the cover will appear twice.
- Insufficient gutter margins - Text that creeps too close to the spine is unreadable in the bound book. KDP may reject your file or readers will struggle. Use margins above the minimums.
- Wrong trim size in the PDF - If your PDF page dimensions do not match the trim size you selected in KDP, the content will be stretched or cropped. Match them exactly.
- Low-resolution images - Images below 300 DPI look pixelated in print, even if they look fine on screen. Check image resolution before exporting.
- Not ordering a proof - The digital previewer is useful but not a substitute for holding the physical book. Proof copies catch issues you cannot see on screen.
- Pricing too low on color books - Color printing is 2× more expensive. If your list price is too low, your royalty after printing cost may be pennies. Calculate before publishing.
- Forgetting Expanded Distribution margins - Expanded Distribution takes 40% (not 60%) of the list price. A book that earns $5 on Amazon may earn $0.50 or less through Expanded Distribution. Set a price that works on both channels.
- Changing trim size after publishing - You cannot change trim size on an existing edition. If you need a different size, you must create a new book with a new ISBN.