KDP vs IngramSpark

What each platform is built for

KDP is Amazon’s own self-publishing platform, built to get ebooks, paperbacks and hardcovers listed and sold on Amazon’s retail sites in the territories it operates in. Its core strength is deep integration with Amazon’s search, recommendations, advertising and Kindle Unlimited systems.

IngramSpark is a print-on-demand and distribution platform run by Ingram Content Group, built to connect a title to a wide trade network of bookshops, libraries, wholesalers and international distributors that do not primarily source stock through Amazon. Its core strength is reach into that separate trade ecosystem.

A detailed comparison

Amazon availability

Both platforms can, in different ways, result in a book being available on Amazon. A KDP paperback is sold directly on Amazon by default. A book distributed through IngramSpark can also sometimes reach Amazon depending on current distribution settings and territory, though the mechanics and any listing differences should be checked against current documentation from both platforms rather than assumed.

In practice, most authors who want their paperback to look and behave like a native Amazon listing, with full access to Amazon’s advertising tools, publish that specific edition directly through KDP rather than relying on an IngramSpark-distributed copy to reach Amazon.

Trade distribution in more depth

This is IngramSpark’s clearest area of strength. Because Ingram is a long-established wholesaler that many bookshops and library suppliers already use, a book distributed through IngramSpark is more readily discoverable and orderable by those buyers than a book that exists solely within KDP’s ecosystem. This does not guarantee sales, but it removes a genuine sourcing barrier for trade buyers who are reluctant to buy stock through a retail competitor for resale.

Bookshop ordering, compared

An independent bookshop asked to order in a specific title is more likely to find it straightforward if the book is available through Ingram’s catalogue, which many shops already use as a wholesale source. The same request for a KDP-only title can sometimes be harder to fulfil, depending on the shop’s own policies and whether KDP’s expanded distribution options (where offered) reach that particular supplier relationship.

Libraries, compared

Library suppliers commonly search catalogues like Ingram’s when sourcing titles, which makes IngramSpark distribution more directly relevant for authors hoping for library availability. KDP-only titles are less likely to appear through the specific channels many library systems use for acquisition, though this varies by library and by country.

Print options and quality

Both platforms offer a range of trim sizes, paper types and binding options, including hardback options on IngramSpark and, depending on current offerings, on KDP as well. Print quality between the two is generally considered broadly comparable for standard trade paperback specifications, though the specific paper stock, cover finish options and hardback capability can differ, so comparing the current specification sheets for your exact format is the most reliable approach.

ISBN handling, compared

KDP offers the option of a free ISBN assigned by KDP for certain editions, which is convenient but lists KDP-related information as part of the publication record. IngramSpark generally expects a title to have its own ISBN, which many authors purchase independently to retain full control over the publisher-of-record details. This is a genuine point of difference worth understanding before deciding how to set up an edition on each platform.

Pricing, compared

Both platforms calculate a minimum viable retail price based on print costs for the chosen specification, and both allow the author to set a retail price above that minimum. Because print costs, currency conversions and any wholesale discount settings differ between the two platforms, and because these figures change over time, the only reliable way to compare likely author earnings for a specific book is to run the numbers through each platform’s own current pricing calculator side by side.

Upload and setup experience

KDP is generally regarded as the more beginner-friendly of the two platforms, with a simpler upload wizard and less exacting file preparation for a first attempt. IngramSpark’s file specifications, particularly around cover bleed, spine calculations and interior PDF settings, are more exacting, which can mean more back-and-forth for a first-time user, though this becomes more familiar with practice.

Author copies

Both platforms allow the account holder to order their own printed copies at a cost related to production, rather than paying the full retail price, which is useful for events, review copies or personal stock. The exact cost of ordering author copies on either platform depends on the specification and current pricing, and is best checked directly on each platform before ordering in bulk.

Print economics in practice

For example, an author producing a standard 300-page paperback novel in a common trim size might find broadly similar per-unit print costs on both platforms, with the main practical differences appearing in the wholesale discount and returnability settings available on IngramSpark, and in the way KDP’s pricing interacts with its royalty calculation for Amazon sales specifically. Running the same specification through both calculators before publishing is the most reliable way to see how the economics compare for that particular book.

The wholesale discount and its trade implications

IngramSpark’s wholesale discount and returnability settings are specifically designed to appeal to trade buyers, and adjusting them can influence how attractive a title looks to a bookshop deciding what to order. KDP’s pricing model is built primarily around direct consumer sales on Amazon and does not offer the same kind of trade-facing wholesale discount configuration in the same way.

Returns policy, compared

IngramSpark offers a returnable option that some bookshops look for before ordering, reflecting standard trade practice. KDP’s retail model, being direct-to-consumer through Amazon, does not generally involve the same bookshop-return dynamic, since it is not primarily selling into a shop’s physical stock.

Ebook options, compared

KDP is the dominant platform for reaching the Kindle store specifically, and most authors publish their Kindle edition directly through KDP regardless of what else they use for print. IngramSpark has, at times, offered ebook distribution to a range of other retailers and library platforms; check current IngramSpark documentation for exactly what is supported if this matters to your plans.

Account ownership, on both platforms

On both KDP and IngramSpark, it matters enormously whose name and details the account is registered under, since that determines who controls pricing, metadata and payments. Whichever platform or platforms you use, keeping the account in your own name, as the rights holder, is the safest approach, and is consistent with the wider guidance in our rights and royalties explanation.

Support and day-to-day workflow

Both platforms provide help documentation and support channels for account holders, and both are self-service in the sense that no human editorial gatekeeper reviews a manuscript before it can be published. Ongoing workflow differs mainly in how often you need to check pricing, respond to file rejections, and reconcile sales reports, which tends to be a little more involved with IngramSpark due to its more technical requirements.

When each platform tends to fit best

KDP alone tends to fit well for authors whose readers are mainly found on Amazon, who want the simplest possible setup, and who are not actively pursuing bookshop or library placement. IngramSpark tends to fit well, either alone or alongside KDP, for authors who want a realistic chance of independent bookshop or library availability, or who are targeting markets and formats Amazon does not serve as directly.

Using both platforms

It is entirely possible, and common, to use both: KDP for Amazon-focused sales including Kindle, and IngramSpark for wider print distribution to bookshops and libraries. Our guide on using KDP and IngramSpark together covers the practical steps and pitfalls of running both accounts for the same book.

Common mistakes

• Assuming one platform is universally better. They serve different distribution purposes, and the better choice depends on the specific book and its likely readers.
• Comparing headline royalty claims without checking specifications. Author earnings depend heavily on trim size, page count and pricing, so comparisons should use matched specifications on both platforms.
• Assuming Amazon availability is identical either way. A native KDP listing and an IngramSpark-distributed copy reaching Amazon are not automatically the same in terms of features and control.
• Overlooking ISBN implications when comparing. The ISBN and publisher-of-record decision differs meaningfully between the two platforms and affects long-term flexibility.

Frequently asked questions