How to Format a Book for Lulu Print-on-Demand

Lulu has printed books on demand since long before most self-publishers had heard of it, and it still leads on choice: more trim sizes, genuine hardcover and spiral options, and distribution that reaches bookshops, not just online carts. But Lulu is also less forgiving about file preparation. A manuscript that sailed through another platform’s uploader can be rejected here for a font that is not embedded, a spine two millimetres too narrow, or a cover built to the wrong dimensions.

That is why learning to format a book for Lulu print-on-demand is worth doing properly the first time. Every rejection costs days: Lulu reviews your files, emails you a list of problems, and you re-export, re-upload, and wait again. A print-ready interior PDF and a correctly built cover PDF, made to Lulu’s own specifications, turn that slow loop into a single smooth upload.

What Makes Lulu Different from KDP

The first decision is understanding what you are formatting for. Lulu is a print-on-demand printer first and a retailer second, while Amazon’s KDP is a retailer first. On KDP your book lives mostly on Amazon; on Lulu you can sell directly from your own storefront, order author copies at print cost, and reach bookshops through global distribution. That difference shapes the files: Lulu offers more trim sizes, paper stocks, and bindings, but expects you to know how to use them.

Lulu also gives you choices KDP does not: colour printing on uncoated paper without KDP’s premium colour surcharge, spiral binding for workbooks, and single proof copies at print cost. The trade-off is stricter file review: a missing font or low-resolution image that another uploader quietly accepts can stop a Lulu job cold. Note that a KDP cover PDF will almost never transfer: Lulu’s spine width, cover dimensions, and safe areas are its own, so the cover must be rebuilt from scratch. If you already have a KDP edition, our guide to formatting a book for KDP print shows where the two platforms diverge. our guide to formatting a book for KDP print

Choosing a Lulu Trim Size and Getting the Template Right

Everything in a Lulu book starts with the trim size, because every other measurement — margins, gutter, spine width, cover dimensions — flows from it. Lulu’s most popular paperback sizes are 6 x 9 inches for fiction and nonfiction, 5.5 x 8.5 inches for shorter books, 8.5 x 11 inches for workbooks, and 8.25 x 10.75 inches for illustrated books. Hardcovers run from 6 x 9 inches up to 8.5 x 11 inches, and Lulu also offers square sizes such as 7.5 x 7.5 inches, which suit photo books well.

Do not pick a trim size because it looks good on a shelf; pick it because it fits the book. A novel reads best at 6 x 9 inches, where the line length is comfortable. A workbook with exercises and wide illustrations needs 8.5 x 11 inches, or the content will feel cramped. An illustrated book or photo book wants a square or landscape trim so the images can breathe. Changing trim size later means reformatting the whole book.

Once the size is chosen, download the matching template from Lulu’s site — Lulu publishes Word and InDesign templates for every trim and binding, with the margins, gutter, and bleed guides already drawn in. Paste your manuscript into the template rather than building the layout from a blank document, and keep the guides visible while you work: they show you where the safe area ends and how much bleed the printer needs.

Formatting the Interior: Fonts, Margins, Bleed, and Page Numbers

The interior PDF is the file Lulu prints from, so it has to be exact. Export it as a single PDF with all fonts embedded — Lulu rejects unembedded fonts, because the printer’s computer may substitute a different font and change your line breaks. In Word, check the embed-fonts option when you save as PDF; in InDesign, use the PDF/X-1a preset, which embeds fonts by default.

Margins are where most Lulu rejections happen. The outside, top, and bottom margins must be at least 0.5 inches, and the inside margin — the gutter — must grow with the page count: 0.6 inches for 100 pages, at least 0.75 inches for 300 pages, and 0.9 inches or more for 500 pages, because the binding eats the inside edge. Our book margins and gutter guide walks through the exact numbers for every page count. our book margins and gutter guide Keep all text, page numbers, and running heads inside the safe area, at least 0.25 inches from the trim edge on every side.

Bleed applies only to pages where an image or a coloured background runs to the edge of the paper: those pages need 0.125 inches of extra image beyond the trim on every bleeding side, so the trimmer cuts cleanly without leaving a white hairline. Pages with ordinary text need no bleed at all. Our print bleed setup guide explains how to set this up in Word and InDesign. our print bleed setup guide Page numbers belong in the footer, centred or on the outside corner, and should start on the first page of chapter one. Images should be at least 300 dots per inch at their printed size, in CMYK or greyscale. If the same manuscript also needs an ebook edition, our guide to formatting a book for print and ebook together shows how to plan one source file for both outputs. our guide to formatting a book for print and ebook together

The Cover File: Spine Width, Bleed, and the Lulu Cover Template

The cover is a separate file from the interior, and it is the file Lulu rejects most often. It is a single one-piece PDF containing the back cover, the spine, and the front cover in one wide image, and its total width depends on the spine, which depends on the page count and the paper stock. Lulu’s spine-width calculator does the maths: enter the trim size, page count, and paper type, and it gives the spine width in inches. A 200-page book on white 80 gsm paper has a spine of roughly 0.5 inches; a 400-page book can have a spine over an inch wide. Get the page count from your final interior PDF, not a draft: adding ten pages after you build the cover changes the spine and the cover must be rebuilt.

Build the cover inside Lulu’s cover template for your exact trim, page count, and paper. The template shows the safe areas: keep all text and logos at least 0.25 inches inside the trim lines, keep the spine text centred on the spine with room to spare, and extend the background colour or image 0.125 inches past every outer edge as bleed. Leave the barcode box on the back cover clear — Lulu places the ISBN barcode there, and artwork behind it will print under the barcode. Export the cover as a PDF with fonts embedded and images at 300 dots per inch, and check the finished file at full size before uploading.

ISBNs, Distribution, and Pricing on Lulu

Every book Lulu distributes needs an ISBN, and you have two choices. Lulu will give you a free ISBN, which costs nothing and gets your book into its distribution network, but that ISBN belongs to Lulu as the publisher of record, and you cannot use it on another platform or in another edition. Your own ISBN, bought from your national ISBN agency, costs about $125 in the United States for a single ISBN, but it lists you as the publisher and travels with the book wherever you print it. For a book you plan to sell seriously, buy your own; for a first experiment, the free Lulu ISBN is a sensible way to start.

Distribution is where Lulu earns its keep. With a Lulu ISBN and global distribution enabled, your book appears in the catalogues that bookshops and libraries order from, and Lulu prints and ships each copy as it is ordered. Without distribution, your book sells only through your Lulu storefront and your own links — and you keep more of each sale. Either way, set your retail price with Lulu’s pricing calculator before you publish: a 200-page 6 x 9 inch paperback that costs $5.50 to print and sells for $14.99 leaves you about $9.49 before any distribution discount, and with global distribution the retailer takes its share first, so check the distributed profit figure.

Lulu also offers hardcovers with a printed case laminate or a dust jacket, and the formatting differs in small but important ways: a larger cover file, a wider spine for the same page count, and slightly larger interior margins because the binding is stiffer. Our guide to KDP paperback vs hardcover formatting covers the general differences between the two bindings, and the same principles apply on Lulu. our guide to KDP paperback vs hardcover formatting

Uploading, Proofing, and Fixing Rejections

Uploading is straightforward once the files are right. In Lulu’s publishing flow you create the project, choose the trim, binding, and paper, upload the interior PDF and the cover PDF, and Lulu runs its automated file review. The review checks page size, font embedding, image resolution, bleed, and spine width, and reports problems in plain language with the page numbers affected. Fix every item it flags, re-export, and upload again — the printer prints exactly what you send it.

Then order a printed proof before you publish. A proof costs the print price plus shipping, and it is the only way to see what your book really looks like: whether the gutter swallows the inside text, whether the cover colours print darker than they looked on screen, whether the spine text sits straight. Read the proof with a pencil in hand, mark every fix, and correct the files before you approve the book for sale.

If Lulu rejects your files, read the rejection email carefully — it names the problem and usually the page. The most common rejections are unembedded fonts, images below 200 dots per inch, a cover built to the wrong spine width, and text outside the safe area. Before you upload anything, run through our book formatting checklist for self-published authors — it catches the small errors that creep into long books. our book formatting checklist for self-published authors

• Choose the Lulu trim size before setting any margins
• Download the Lulu template for that exact trim and binding
• Embed all fonts in the interior PDF and verify each one says Embedded
• Set the gutter from the final page count, not a guess
• Add 0.125 inch bleed only to pages where images reach the edge
• Keep all text at least 0.5 inches from the trim edge
• Calculate the spine width from the final page count and paper stock
• Build the cover as a one-piece PDF in Lulu’s cover template
• Leave the barcode area on the back cover clear
• Export images at 300 dpi and check them at full size
• Decide on a free Lulu ISBN or your own ISBN
• Order a printed proof and read it before enabling distribution

Frequently Asked Questions

Can I use my KDP files on Lulu?

The interior PDF will often work if the trim size matches and the fonts are embedded, but the cover almost never transfers. Lulu’s spine width, cover dimensions, and safe areas are different from KDP’s, so rebuild the cover in a Lulu template and run its file review before you publish.

How much does it cost to print a book on Lulu?

A typical 200-page 6 x 9 inch paperback costs about $5 to $7 to print, before shipping, and Lulu’s pricing calculator gives the exact figure for your trim, page count, and paper. Colour interiors and hardcovers cost more per page than black-and-white paperbacks. You pay the print cost only when a copy is ordered, plus shipping.

Does Lulu give me an ISBN?

Yes — Lulu offers a free ISBN for books in its distribution network, but it lists Lulu as the publisher of record. To be listed as the publisher yourself, or to use the same ISBN elsewhere, buy your own ISBN from your national ISBN agency.

How long does Lulu take to print and ship a proof?

A proof usually prints within two to five working days, then ships by your chosen method — about a week within the United States, longer internationally. Order it early, because any corrections mean another proof and another wait.

Can bookshops order my Lulu book?

Yes, if you enable global distribution and assign an ISBN. Your book then appears in the catalogues that bookshops and libraries use, and Lulu prints and ships each copy as it is ordered. Bookshops usually order with a discount, so set your retail price to leave room for the trade discount.

Conclusion: A Print-Ready File Is the Whole Job

To format a book for Lulu print-on-demand is to respect a printer’s rules and let them work for you. Choose the trim size first, build the interior in Lulu’s template with embedded fonts and honest margins, calculate the spine from the finished page count, and build the cover as one piece to fit it. Then prove it all with a printed copy in your hands before anyone else can buy one.

The reward is a book that looks trade-published: clean pages, a straight spine, colours that print true, and a file that prints the same on the hundredth copy as on the first.