KDP and POD in 2026: The New Professional Standard

Updated Oct 2026: this editorial has been rewritten and now cites its sources.

For independent authors, publishing a print book through Amazon's Kindle Direct Publishing (KDP) now involves a set of rules and options that did not exist a few years ago: hardcover printing, limits on how many titles a single account can create, and a requirement to disclose AI-generated content. Taken together, they amount to a professional standard that authors need to understand before they publish. This editorial sets out those requirements as described on Amazon's own pages and in news coverage, and considers how they fit alongside other print-on-demand options.

The core economics

KDP's print book pricing terms set a royalty of 50% or 60% of list price for standard Amazon distribution, with the rate depending on the price, and 40% for Expanded Distribution, in each case minus the printing cost. The printing cost is a fixed amount per book plus an amount per page that depends on the marketplace and the ink type. Royalties are paid about 60 days after the end of the month in which sales are reported, or 90 days for Expanded Distribution.

Those figures form the baseline for any pricing decision. A professional approach begins by calculating the printing cost and the royalty that results at a range of list prices.

Formats

KDP has offered hardcover printing since September 2021, for books between 75 and 550 pages, with a case-laminate cover rather than a dust jacket. Hardcovers cannot be enrolled in Expanded Distribution, according to the hardcover help page.

The new compliance layer

Two changes in 2023 added new obligations. In September of that year Amazon began requiring self-publishers to declare AI-generated content, defined as text, images or translations created by an AI-based tool, while AI-assisted content does not need to be declared. Amazon also limited accounts to creating three new titles a day.

KDP's metadata guidelines set rules for titles, descriptions and keywords. A professional listing follows them, both to avoid trouble with the platform and to give readers an accurate picture of the book.

Low-content books

KDP classifies notebooks, journals and planners as low-content books. They do not require an ISBN and are not eligible for KDP's free ISBN, and KDP says it does not currently offer a scheduled release date for them. KDP lists puzzle and coloring books as not generally low-content, so those follow the regular print rules. Authors publishing in these formats need to select the low-content option during setup.

Subscription reading

Ebooks and audiobooks enrolled in KDP Select are included in Kindle+ (renamed from Kindle Unlimited in October 2026), Amazon's subscription program, with audiobooks included for customers on Amazon.com, in which authors earn from the KDP Select Global Fund based on subscribers' reading and listening, measured in Kindle Edition Normalized Pages. KDP pays for the first time a subscriber reads or listens to a given page. Subscription reading carries weight for many independent authors: respondents to the Authors Guild's 2023 income survey ranked Kindle Unlimited or similar programs among the three most effective marketing channels, and the Guild reported: "Kindle Unlimited was particularly effective for self-published authors, who earned 67 percent more book income from the platform than traditionally published authors make on book-earnings alone." Amazon said in 2024, according to Publishers Weekly, that KDP authors had earned more than $3.5 billion in Kindle Unlimited royalties over ten years.

The economics can work. The Guild's survey found that full-time self-published authors had a median book income of $12,800 in 2022, and that those publishing since at least 2018 reported a median of $24,000, up 76% from 2018. Genre makes a large difference: full-time romance and romantic suspense authors reported the highest median book income of any genre, $31,725.

Honest marketing

Professional standards also extend to how a book is promoted. The FTC's rule on consumer reviews and testimonials, effective 21 October 2024, bars buying positive or negative reviews and selling or buying fake ones. The publishing world has already seen the cost of manipulation: in 2023 Del Rey dropped debut author Cait Corrain after she admitted using fake Goodreads accounts to manipulate ratings.

A crowded market

The standard carries more weight because competition is growing. Bowker figures reported by Publishers Weekly show that self-published output rose 38.7% in 2025 to more than 3.5 million titles. PW noted that the gap between titles with and without BISAC subject codes was much smaller among self-published books, which suggests that self-published authors have recognized the importance of those codes for discovery. Accurate categories and metadata form part of a professional release.

Beyond Amazon

KDP is not the only print-on-demand route. IngramSpark distributes to a wide network of retailers and libraries and allows publishers to set a wholesale discount between 40% and 55%; its guidance notes that the trade discount most publishers offer booksellers is 55%, and that a lower discount can limit sales to booksellers. An author can use KDP for Amazon sales and IngramSpark for other channels.

Choosing between the two, or combining them, depends on where an author expects to sell. A book aimed at bookstores needs terms that bookstores accept. A book sold mainly on Amazon may not.

A checklist for 2026

Based on the sources above, a professional KDP print release involves:

1. Calculating the printing cost and royalty at the intended list price.
2. Choosing formats, with the hardcover limits in mind.
3. Declaring AI-generated content, if there is any.
4. Writing accurate metadata in line with KDP's guidelines.
5. Deciding on distribution beyond Amazon, through Expanded Distribution or another printer.

The standard, defined

What makes KDP print a professional channel is not the platform by itself but the care authors bring to each of these steps. Amazon publishes its formulas, its timelines and its rules. Authors who work from them can price accurately and stay within the platform's requirements.

More information is available through Amazon's POD services.