Bleed is one of those print terms that sounds more complicated than it is. But getting it wrong — either adding bleed when you don’t need it or omitting it when you do — can get your book file rejected by KDP or IngramSpark, or produce a printed book with unintended white edges where ink should extend to the paper’s edge.
Here’s what bleed actually means, when you need it, and exactly how to set it up.
What is bleed?
Bleed refers to any ink, color, or image that extends beyond the trim line of a page — the line where the paper will be cut during manufacturing.
When a commercial printer produces a book, the pages are printed on larger sheets of paper and then cut to the final trim size. That cutting process isn’t perfectly precise. There’s a tolerance of about 1/16 to 1/8 of an inch. If your design has a colored background, image, or graphic that’s supposed to go all the way to the edge of the page, and you only extend it exactly to the trim line, the slight variation in cutting could leave a thin white sliver along one or more edges.
To prevent this, you extend the design element beyond the trim line by a small amount — typically 0.125 inches (1/8 inch) or 3mm. This extra area is the bleed zone. When the paper is cut, the printer cuts through this extended area, ensuring ink runs all the way to the finished edge with no white gaps.
When you need bleed
You need bleed when any visual element touches or crosses the edge of the page. Specifically:
- Full-page images that extend to one or more edges
- Colored backgrounds that fill the entire page
- Graphics or illustrations that run off the edge of the page
- Decorative borders that touch the page edge
- Maps, charts, or diagrams that extend to the trim edge
Common book types that need bleed:
- Children’s picture books (full-bleed illustrations on most pages)
- Photography books and art books
- Cookbooks with full-page food photography
- Coffee table books
- Graphic novels and comics
- Some nonfiction books with full-page infographics or images
When you don’t need bleed
Most text-only novels do not need bleed. If your book interior is text on white pages with no images, colored backgrounds, or graphics that touch the page edge, you don’t need bleed settings.
This covers the vast majority of:
- Fiction (all genres)
- Memoir and narrative nonfiction
- Business and self-help books
- Academic and reference books
Even if your book has a few interior images (like a map on the first page of a fantasy novel), you likely don’t need bleed — as long as those images don’t extend to the page edge. An image centered in the text block with white space around it doesn’t require bleed.
The rule is simple: if nothing touches the edge, you don’t need bleed.
When you don’t need bleed, don’t add it. Setting up bleed on a text-only novel adds unnecessary complexity and can shift your layout in unexpected ways if your formatting tool adjusts margins to accommodate the bleed zone.
Standard bleed sizes
The bleed size is consistent across the industry:
Amazon KDP
- Bleed size: 0.125” (1/8 inch) on the top, bottom, and outside edge
- Inside edge (spine): No bleed on the inside/spine edge
- KDP’s requirement: If you enable bleed, your PDF page size must include the bleed area. For a 6”x9” trim size with bleed, your PDF pages should be 6.125” x 9.25” (0.125” added to the outside, top, and bottom — not the spine side)
IngramSpark
- Bleed size: 0.125” (3mm) on all three outer edges (top, bottom, outside)
- Inside edge: No bleed
- IngramSpark’s note: Their specifications are functionally identical to KDP’s for bleed
General commercial printing
- Standard bleed: 0.125” (3mm) on all edges, including the spine edge in some cases
- Check with your specific printer for their requirements
The safety margin
Bleed is about extending outward past the trim line. The safety margin (also called the “safe zone” or “live area”) is about keeping important content inward from the trim line.
Because the cutting process has tolerance, you need to keep all critical content — text, important parts of images, page numbers — at least 0.25 inches (6mm) from the trim edge on all sides. This ensures that nothing important gets accidentally cut off.
For text-only books, your margins already handle this. Standard book margins are well inside the safety zone. But for image-heavy books with bleed, it’s easy to accidentally place important image content (like a face in a photo) too close to the trim edge. The printer’s cut could clip it.
Think of it as three zones:
- Bleed zone (0.125” beyond trim): Ink extends here, gets cut off
- Trim line: Where the paper is cut
- Safety margin (0.25” inside trim): Keep all important content inside this line
Setting up bleed in your tools
Microsoft Word
Word doesn’t natively support bleed. You can set a custom page size that includes the bleed area (e.g., 6.125” x 9.25” for a 6”x9” book), but you’ll need to manually ensure all bleed elements extend to the edge of this oversized page while keeping text within the trim area. It’s cumbersome and error-prone. For bleed-heavy books, Word is not the right tool.
Cambric
Cambric includes bleed as a toggle in its export settings. When enabled, the Typst-based typesetting engine adds the correct 0.125” bleed zone to the top, bottom, and outside edges automatically. The resulting PDF is sized correctly for KDP or IngramSpark with no manual page-size math required.
Adobe InDesign
InDesign handles bleed natively. When creating a new document (File > New > Document), enter your trim size as the page size and set the bleed values in the Bleed and Slug section. When exporting to PDF, check “Use Document Bleed Settings.” InDesign will create a PDF with the bleed area included and trim marks placed correctly.
Canva
Canva has a “Show print bleed” toggle in its page settings. When enabled, it shows the bleed zone as a shaded area around the design. Elements that extend into this area will bleed. This works for simple designs but Canva isn’t recommended for book-length projects.
Affinity Publisher
Similar to InDesign — set bleed values in Document Setup and export with bleed marks included.
Bleed vs. margins: understanding the difference
These two concepts are related but distinct:
Margins define the space between the trim edge and the text block. They’re inward from the trim line. Margins keep your text readable by providing breathing room from the page edges. Every book needs margins, whether or not it uses bleed.
Bleed extends outward from the trim line. It’s extra image or color area that gets cut off during manufacturing. Bleed only matters when design elements need to reach the page edge.
A common confusion: setting your margins to zero is not the same as using bleed. Zero margins would put your text at the trim line (unreadable and unprofessional). Bleed puts your images or backgrounds beyond the trim line.
Full-bleed pages in image-heavy books
If you’re producing a book where most or all pages have full-bleed images (like a children’s picture book or photography book), here’s the workflow:
- Set your document to the trim size with 0.125” bleed on three sides
- Extend all background images or colors 0.125” past the trim on every bleed edge
- Keep all text and important image content 0.25” inside the trim
- Export your PDF with bleed and, optionally, crop marks
- Upload to your printer’s platform and verify the preview shows ink extending to the edges
For KDP specifically, if you’re doing a paperback with bleed, your page count must be at least 24 pages, and KDP will adjust the spine width calculation slightly for bleed books. Cambric’s cover dimensions calculator accounts for this bleed-adjusted spine width automatically.
Mixed-bleed books
Some books have a mix of bleed and non-bleed pages — for example, a novel that’s mostly text but has a few full-page maps or illustrations. This creates a decision:
Option 1: Enable bleed for the entire book. Your PDF includes the bleed area on every page, even though most pages don’t use it. The text-only pages simply have white space in the bleed zone. This is the simpler approach and what KDP and IngramSpark expect.
Option 2: Avoid bleed entirely. Keep your images within the text block with margins around them, so nothing touches the page edge. This means your full-page images won’t truly go edge-to-edge, but it simplifies the PDF setup.
For most novels with a handful of interior images, Option 2 is the better choice. Full bleed adds complexity for minimal benefit when only a few pages use it.
Common bleed mistakes
Adding bleed to a text-only novel
Unnecessary complexity. If your book is just text, leave bleed settings alone. Enabling bleed when you don’t need it can cause unexpected margin shifts in some tools and makes your file setup more complex for no benefit. Cambric leaves bleed off by default for text-only interiors, so you won’t accidentally trigger margin shifts or oversized PDFs.
Bleed on only some edges
If an image extends to the right edge and bottom of the page, you need bleed on those edges. But KDP and IngramSpark expect bleed settings to apply uniformly to all three outer edges (top, bottom, outside). Set up bleed on all three even if only some pages use it on all edges.
Images that stop exactly at the trim line
If your image extends exactly to the trim line and not beyond, any cutting variation will show a white sliver. Always extend bleed elements the full 0.125” past the trim. Don’t stop short.
Important content in the bleed zone
Anything in the bleed zone will be cut off. Don’t place text, faces, or important details in that area. The bleed zone exists only for background fill that can afford to be lost.
Forgetting to embed images at high resolution
Bleed won’t help if your images are low resolution. Images in print books should be 300 DPI at their printed size. A blurry image that extends to the edge is still a blurry image.
Setting up bleed for KDP and IngramSpark
For both platforms, the process is:
- Determine whether you need bleed (does anything touch the page edge?)
- If yes, set up your document with 0.125” bleed on top, bottom, and outside edges
- Extend bleed elements fully into the bleed zone
- Keep all critical content within the safety margin (0.25” from trim)
- Export a PDF with the bleed area included
- During upload, indicate that your file uses bleed
- Review the printed proof carefully — don’t skip this step
Both KDP and IngramSpark have bleed templates and specifications available on their platforms. Download and follow these for your specific trim size.
Cambric handles bleed settings as part of its export configuration. For text-only books, bleed is off by default — no extra setup needed. For books with full-page images, you toggle bleed on, and the export engine generates a print-ready PDF with the correct bleed zone and safety margins built in, sized correctly for KDP or IngramSpark. At $109 one-time, it removes the guesswork from bleed setup entirely.