KDP vs. IngramSpark in 2026: A practical comparison for indie authors

If you are self-publishing a print book, you will hit the same question sooner or later: should you publish with Amazon KDP, IngramSpark, or both? Ask in any author group and you will get strong opinions in every direction. Some authors swear KDP is all you need. Others say you are leaving bookstores and libraries on the table if you skip IngramSpark.

The truth is less dramatic. Both platforms are good at different things, and the right choice depends on where you want your book to be sold.

KDP vs IngramSpark: The short answer for indie authors

KDP is the simpler and more profitable choice if most of your sales will come from Amazon. IngramSpark is the better choice if you want bookstores and libraries to be able to order your book, because it lets you set the wholesale discount and accept returns. Many indie authors use both: KDP for Amazon and IngramSpark for everywhere else, with the same ISBN you own on each. The sections below show the 2026 numbers behind that answer.

KDP and IngramSpark at a glance

Fees and rates change, so treat this table as a snapshot of October 2026. Each figure is linked to the platform's own page in the sections below.

What KDP does best

Kindle Direct Publishing is Amazon's own publishing platform, and its biggest advantage is simple: your readers are already shopping on Amazon. When you publish a paperback through KDP, Amazon prints and sells it directly, so the book shows as in stock, qualifies for Prime shipping, and earns the highest print royalty available on Amazon. According to KDP's paperback royalty page, you earn 60% of the list price minus printing costs on Amazon.com when the price is $9.99 or higher, and 50% when it is $9.98 or lower.

KDP is also easier to learn. The setup screens are straightforward, and the cover calculator and Print Previewer catch many problems before you publish. If this is your first book, that matters more than most authors expect.

For eBooks, KDP is the natural home for your Kindle edition. You earn 70% of the list price (minus a small delivery fee based on file size) when the price falls inside Amazon's 70% band. As of July 7, 2026, that band runs from $2.99 to $12.99 on Amazon.com, up from the old $9.99 ceiling. You can also enroll in KDP Select to put your eBook in Kindle Unlimited, though that requires the eBook to be exclusive to Amazon.

Where KDP falls short

KDP's weak spot is everything outside Amazon. It offers Expanded Distribution, which makes your paperback available to other retailers and libraries, but the royalty is 40% of list price minus printing, and hardcovers are not eligible at all. KDP also gives you no say over the discount or returns terms that bookstores look for. Many independent shops expect a standard trade discount and the ability to return unsold copies, and some are wary of stocking anything that comes through Amazon. If your goal is to see your book on a local bookshop shelf, KDP alone usually will not get you there.

What IngramSpark does best

IngramSpark is the self-publishing arm of Ingram, one of the largest book distributors in the world. When a bookstore or library orders a book, there is a good chance it comes through Ingram's catalog. That is IngramSpark's real strength: your book is listed in a system buyers already use, and you control the two settings they care about most.

The first is the wholesale discount, which is the percentage off list price that retailers receive. Many authors choose around 40% when they only want online availability, and 53% to 55% when they want bookstores to consider stocking the book. The second is returns. Accepting returns makes stores far more willing to order, but it adds risk. If a store sends copies back, IngramSpark charges you the wholesale cost plus $3.00 per book for US returns. Choosing the "destroy" option instead means you pay only the wholesale cost.

IngramSpark also gives you more print options, including hardcovers with dust jackets, a wider choice of paper and binding, and extra trim sizes. For a gift book, a premium hardcover, or a picture book with special requirements, that flexibility can make a real difference.

Where IngramSpark falls short

IngramSpark is less forgiving than KDP. Its file requirements are stricter, its cover templates are different, and settings like discounts and returns confuse many first-time authors. Your earnings per copy are also usually lower, because you are paid the wholesale price minus printing and a distribution fee, so the bigger the discount you give bookstores, the less you keep.

Pricing also changed in 2026. In February, IngramSpark raised its global distribution fee from 1.5% to 1.875% of list price and increased print costs on most formats, according to the Alliance of Independent Authors' breakdown. The same update made revisions free, which used to cost $25 after the first 60 days. Check IngramSpark's pricing page before you budget.

How much do you actually earn? A worked example

Royalty percentages are hard to compare because each platform calculates them differently. So here is one book run through both. Say you have a 6 x 9 inch black-and-white paperback priced at $15.99. To keep the comparison fair, the example assumes printing costs $4.25 per copy on both platforms. Real costs differ by page count and platform, so plug your own numbers into each platform's calculator.

Three things stand out. On Amazon, KDP pays the most, so if most sales will come from Amazon, publishing the paperback through KDP makes sense. For sales outside Amazon, IngramSpark pays more than Expanded Distribution even at a bookstore-friendly 55% discount, which is why so many authors use it for wide distribution. And the bookstore discount has a real cost: going from 40% to 55% cuts earnings per copy roughly in half. That is worth it if you are actively pitching shops, and not worth it if you are only hoping they find you.

What about eBooks?

For most indie authors, KDP is the obvious home for the Kindle edition. IngramSpark can distribute eBooks to other stores and pays 85% of the net revenue it receives, but that is after the retailer takes its share, so earnings depend on the store. If you enroll in KDP Select, your eBook must be exclusive to Amazon, so you cannot distribute it through IngramSpark at the same time. Print editions are not affected, so you can still use IngramSpark for the paperback and hardcover.

The ISBN rule that catches people out

KDP offers a free ISBN for paperbacks, but it can only be used for the KDP edition. IngramSpark also has a free ISBN for US authors, but it works only on IngramSpark and carries its Indy Pub imprint. To publish the same paperback on both platforms, you need an ISBN you own, used on both. In the US, Bowker sells one ISBN for $125 or a block of ten for $295, and each format needs its own number.

One more rule matters. KDP says a paperback is not eligible for Expanded Distribution if its ISBN has already been submitted to another distribution service. That is not a problem if you use IngramSpark for wide distribution, since you will leave Expanded Distribution off anyway. Our guide to buying your own ISBN or using KDP's free one covers the decision in full.

Should you use both KDP and IngramSpark?

For many authors, yes. The most common setup works in five steps:

1. Buy your own ISBN for each print format.

2. Publish the paperback on KDP with that ISBN, so Amazon sells it directly with the higher royalty and Prime shipping.

3. Leave KDP Expanded Distribution switched off.

4. Publish the same paperback on IngramSpark with the same ISBN, so bookstores, libraries, and other retailers can order it.

5. Add a hardcover on IngramSpark if you want a dust jacket or a format KDP does not offer.

Done this way, Amazon customers buy the KDP edition and everyone else gets the IngramSpark edition. You keep the best royalty on Amazon and get the widest reach elsewhere. The cost is extra work: two sets of print files, two covers with spine widths matched to each platform's paper, and two dashboards to update whenever you change a price or file.

Which one is right for you?

IngramSpark on its own rarely makes sense for indie authors, since skipping KDP means giving up the best royalty on the biggest online bookstore. If you are still at the planning stage, our beginner's roadmap to self-publishing in 2026 shows where this decision fits.

Common mistakes when using both platforms

Most problems come from a short list of avoidable errors:

• Using KDP's free ISBN on IngramSpark. It cannot be used there, so buy your own ISBN before you publish anywhere.

• Leaving Expanded Distribution on. It pays 40% minus printing and clashes with IngramSpark's distribution, so switch it off if you use both.

• Reusing one cover file. Each platform has its own cover template and paper, so the spine width differs and the cover must be adjusted for each.

• Choosing a 55% discount without checking the math. Run your price through both calculators first, because the discount can cut earnings per copy roughly in half.

• Accepting returns without a plan. Returned copies cost wholesale plus $3.00 each in the US, so decide whether "destroy" is the safer option.

How PublishPro prepares your files for KDP and IngramSpark

Publishing on both platforms usually means formatting your book twice and hoping neither platform rejects the files. PublishPro removes most of that work. You upload a Word or Google Docs manuscript, and PublishPro produces an EPUB and a print-ready PDF (PDFX-1a) with margins, gutter, and bleed calculated from your trim size and page count. Built-in KDP and IngramSpark validation checks the files before you upload, so you are less likely to lose days to a rejection on either platform.

For the cover, PublishPro's book cover design service uses human designers who build the wrap around your final page count, and our cover design guide explains what your designer will need. PublishPro also supports Apple Books, Kobo, Google Play, Barnes & Noble, BookBaby, and Lulu, which helps if your eBook goes beyond Amazon. See the pricing our plans.

Final verdict: Which platform fits your book?

KDP and IngramSpark are not rivals so much as two tools for two jobs. KDP earns the most on Amazon, and IngramSpark opens the door to bookstores and libraries. Decide where your readers will find you, then choose the setup that fits.

"Use KDP to win on Amazon. Add IngramSpark when you want the rest of the shelf."