Self Publication on Amazon: The 2026 A-to-Z KDP Glossary

TL;DR

Self publication on Amazon happens through Kindle Direct Publishing (KDP), a free platform where authors upload ebooks and print books, set their own prices, and earn royalties on every sale. Ebook royalties are either 35% or 70% depending on price, while print royalties range from 50% to 60% minus printing costs. This glossary defines every term you will encounter during the process, from ASIN to wide distribution, with real numbers, formulas, and practitioner warnings baked into each entry.

Why This Glossary Exists

The U.S. self-publishing market was valued at $3.6 billion in 2025 and is projected to reach $5.7 billion by 2033. An estimated 87% of self-published authors use Amazon as their primary platform. That means millions of people are trying to figure out terms like KENP, ASIN, bleed, and expanded distribution, often for the first time.

Every other guide on this topic walks you through the publishing process step by step. That is useful, but it does not help when you encounter a specific term mid-setup and need a quick, accurate definition with context. This glossary fills that gap.

If you need the full walkthrough instead, read our step-by-step KDP guide. And if you would rather hand off the complexity to professionals who handle formatting, metadata, ISBNs, and distribution under one roof, explore Alpaca Authors’ publishing packages.

Use the alphabetical sections below to jump to any term.

Glossary: A

A+ Content

Enhanced product page content that Amazon makes available to KDP authors at no extra cost. A+ Content lets you add comparison charts, lifestyle images, and formatted text modules below your book description. Think of it as a visual sales pitch that sits underneath the standard blurb. Authors who use A+ Content effectively report higher conversion rates because the page looks more polished and professional than a text-only listing.

ASIN (Amazon Standard Identification Number)

A 10-character alphanumeric code Amazon assigns to every product in its catalog, including every Kindle ebook. You do not apply for an ASIN or pay for one. The moment you publish a Kindle ebook, Amazon generates one automatically. ASINs are not the same as ISBNs. An ASIN only works inside Amazon’s ecosystem, while an ISBN is recognized by bookstores, libraries, and distributors worldwide.

Author Central

Amazon’s free author profile tool. Through Author Central, you can add a biography, author photo, blog feed, and link different editions of your books under one profile. It is separate from your KDP account. Many first-time authors skip setting it up, which is a missed opportunity since a completed Author Central page builds credibility with readers browsing your titles.

Glossary: B

Backend Keywords

Seven keyword fields inside the KDP dashboard, each allowing up to 50 characters. These keywords are invisible to shoppers but directly influence whether your book appears in Amazon search results. Think of them as hidden metadata. You do not need to repeat words already in your title or subtitle. Instead, fill these fields with synonyms, related phrases, and terms readers might search. For a deeper look at how metadata and keywords work together, see our book marketing glossary.

BISAC Codes

BISAC (Book Industry Standards and Communications) codes are the publishing industry’s standard subject classification system. Amazon used to let authors pick BISAC codes directly, then translated them into store categories. Since mid-2023, Amazon replaced that process with its own store category picker. You now choose from Amazon’s browse categories rather than selecting BISAC codes. Older guides that mention BISAC selection in KDP are outdated on this point.

Bleed

An extra 0.125 inches of imagery that extends beyond the trim edge of a printed page. If your book cover or any interior page has color, images, or backgrounds that run to the very edge of the page, your file must include bleed. Without it, you risk thin white lines appearing along the edges after trimming. For detailed cover specifications, our complete book cover guide walks through every requirement.

Book Description (Blurb)

The sales copy displayed on your Amazon product page. This is your primary pitch to readers. KDP supports basic HTML formatting in the description field, meaning you can use bold text, italics, and line breaks to make it scannable. A common mistake is pasting in a plain block of text with no formatting. That wall of words sends readers away. Write it like back-cover copy: hook, stakes, reason to buy.

Browse Categories

Amazon’s shelf taxonomy for organizing books. Authors select up to three browse categories per format (ebook, paperback, hardcover) directly in the KDP dashboard. The old method of emailing KDP support to request up to 10 categories was retired in 2023. Choosing the right categories is critical for visibility because it determines which bestseller lists your book can appear on.

Glossary: C

Case Laminate

A hardcover binding style where the printed cover image wraps directly around the rigid board, rather than using a separate dust jacket. KDP hardcovers use case laminate by default. The finish is durable and gives a clean, modern look, but it means your cover design needs to account for the wrap, including spine width calculations and bleed extending around the board edges.

Glossary: D

Delivery Cost

A per-megabyte fee Amazon deducts from your royalties when you choose the 70% ebook royalty rate. The charge is approximately $0.15 per MB. For a text-only novel, this is negligible (often under $0.10 total). For image-heavy books like cookbooks or children’s picture books, delivery costs can eat significantly into your margin. Authors with large file sizes sometimes choose the 35% royalty rate instead because it has no delivery fee.

Glossary: E

Expanded Distribution

A KDP option that makes your paperback available beyond Amazon.com, including online retailers and certain bookstores through wholesale channels. The tradeoff is significant: your royalty rate drops to 40% of list price minus printing cost, compared to 60% for standard Amazon sales. Many authors enable expanded distribution for reach but find that most of their actual sales still come through Amazon directly.

Glossary: F

Fixed Layout

An ebook format designed for books where the page design must stay exactly as the author intended. Children’s picture books, cookbooks, comic books, and heavily illustrated nonfiction typically use fixed layout. Unlike reflowable ebooks, fixed layout pages do not adapt to different screen sizes. Readers on small devices may need to zoom and pan, which can hurt the reading experience.

Glossary: G

Gutter Margin

The inside margin of a printed book, adjacent to the spine where the pages are bound. KDP requires larger gutter margins as page count increases because thicker books curve more at the spine, making inside text harder to read. A 200-page book needs a wider gutter than a 100-page book. Ignoring KDP’s minimum gutter requirements will trigger a file rejection. Our book page layout glossary covers exact margin specifications.

Glossary: H

Hardcover

KDP began offering hardcover printing in 2021 for select trim sizes, with 6"×9" being the most common. Hardcover printing costs are substantially higher than paperback, with fixed costs running approximately $5.50 to $6.80 before per-page charges. Authors should expect to price hardcovers at $20 or above to maintain a reasonable royalty. Case laminate is the only binding option currently available through KDP.

Glossary: I

ISBN (International Standard Book Number)

A 13-digit number that uniquely identifies a specific edition of a book. ISBNs are required for print books on KDP but optional for ebooks (which receive an ASIN instead). KDP offers free ISBNs, but there is an important catch: a free KDP ISBN lists the publisher as Amazon’s imprint and can only be used on Amazon. You cannot take that ISBN to IngramSpark, bookstores, or libraries.

If you want your book in brick-and-mortar stores, you need to purchase your own ISBN. A single ISBN from Bowker costs $125. A pack of 10 costs $295, and 100 costs $575. For a detailed walkthrough, read our guide on how to obtain an ISBN.

Glossary: K

KDP (Kindle Direct Publishing)

Amazon’s free self-publishing platform, and the central tool for anyone pursuing self publication on Amazon. Authors upload ebook and print files, set pricing, choose distribution options, and manage everything from a single dashboard. There are no upfront fees to use KDP. Amazon deducts printing costs (for print books) and delivery costs (for ebooks at the 70% rate) from each sale, then pays the remaining royalty.

KDP Select Author Earnings reached $67 million in June 2026 alone, which gives a sense of how much money flows through the platform. Roughly 87% of self-published authors use Amazon as their primary channel.

KDP Bookshelf

The main dashboard inside your KDP account where you create, edit, and manage all your titles. From the Bookshelf you can update manuscript files, change pricing, view sales reports, and track the status of books in review. Everything operational about your self publication on Amazon starts here. For account setup specifics and compliance steps, check our KDP account setup guide.

KDP Select

Amazon’s exclusivity program, and one of the most debated decisions in self-publishing. When you enroll a book in KDP Select, you agree to make the ebook exclusive to Amazon for a 90-day period that auto-renews unless you opt out. In return, your ebook becomes available in Kindle Unlimited, and you gain access to promotional tools like Kindle Countdown Deals and Free Book Promotions.

KDP Select is not the same as KDP. This confusion trips up a huge number of beginners. KDP is the platform. KDP Select is an optional exclusivity program within that platform.

Practitioners on Reddit consistently recommend that new authors in popular Kindle Unlimited genres (romance, thriller, sci-fi, LitRPG) start with KDP Select for their first 90 days to build momentum, then evaluate whether going wide makes sense. The risk is that you become dependent on a single revenue stream.

KENP (Kindle Edition Normalized Pages)

The unit Amazon uses to calculate how much authors earn from Kindle Unlimited borrows. When a KU subscriber reads your book, Amazon tracks the number of KENP read and pays you a per-page amount from the KDP Select Global Fund. The per-page rate fluctuates monthly (it has hovered around $0.004 to $0.005 per page in recent years). A 300-KENP book read in full might earn roughly $1.35 to $1.50, which is less than a direct sale but adds up with volume.

Kindle Create

Amazon’s free desktop application for formatting manuscripts into KDP-ready files. It handles basic ebook and print formatting, including chapter headings, drop caps, and image placement. Kindle Create works well for straightforward text-heavy books. For complex layouts, illustrated books, or authors who want precise typographic control, professional formatting software or a dedicated formatter typically produces better results.

Kindle Unlimited (KU)

Amazon’s subscription reading program. Readers pay a monthly fee (currently $11.99) for unlimited access to books enrolled in KDP Select. Authors earn per page read rather than per sale. KU is a massive driver of reads for certain genres. In romance and urban fantasy, for example, KU page reads can account for 60% or more of an author’s total KDP income. But enrollment requires exclusivity, which means your ebook cannot be sold on Apple Books, Kobo, Barnes & Noble, or any other platform.

Glossary: L

List Price

The retail price you set for your book. Royalties are calculated as a percentage of this figure (for ebooks) or as a percentage minus printing cost (for print). Setting the right list price is part math, part market research. Price too high and you scare off buyers. Price too low and your royalty disappears, especially on print books where manufacturing costs are deducted first.

Glossary: M

Metadata

All the structured information about your book: title, subtitle, series name, description, backend keywords, categories, contributor names, and more. Metadata is how Amazon’s search algorithm understands what your book is about and who should see it. Poor metadata means poor discoverability, and discoverability is the top challenge for 78% of self-published authors.

Getting metadata right involves more than filling in fields. It requires understanding keyword research, category strategy, and how Amazon’s algorithm weighs different signals. This is one area where professional book marketing help often pays for itself.

Minimum List Price

The lowest price at which your print book royalty equals $0. KDP calculates this automatically, but the formula is simple: divide your printing cost by 0.60 (or 0.50 if pricing below the $9.99 threshold). For a book with a $3.40 printing cost, the minimum list price at the 60% tier would be roughly $5.67. You cannot price below this amount. Any price you set above it is your margin.

Glossary: P

Pre-Order

A KDP feature that lets you list your ebook for sale up to 12 months before the release date. Customers can purchase at the listed price, and the book delivers to their Kindle on launch day. Pre-orders are a powerful launch tool because all pre-order sales count toward your first-day ranking. For paperbacks, KDP pre-orders are more limited. Our book launch tips guide covers pre-order strategy in depth.

Print-on-Demand (POD)

The production model KDP uses for all paperback and hardcover books. Instead of printing thousands of copies upfront and storing them in a warehouse, each copy is manufactured only after a customer places an order. This eliminates inventory risk entirely. There are no upfront manufacturing costs. Amazon prints the book, ships it to the buyer, deducts the printing cost from the sale, and pays you the remaining royalty.

The printing cost formula is straightforward:

Fixed Cost + (Page Count × Per-Page Cost) = Printing Cost

For black-and-white interiors over 108 pages, the fixed cost is $1.00 and the per-page charge is $0.012. A 200-page black-and-white paperback costs approximately $3.40 to print. Standard color interiors cost $1.00 fixed plus $0.0255 per page (a 200-page book comes to about $6.10). Premium color runs $1.00 plus $0.065 per page, making that same 200-page book $14.00 to print.

Most experienced self-publishers price their print books at 2.5× to 3× the printing cost to hit a healthy royalty margin. For a detailed budget breakdown, see our self-publishing cost guide.

Glossary: R

Reflowable Layout

The standard ebook format where text adapts automatically to any screen size, font preference, or reading device. When a reader adjusts the text size on their Kindle, the words reflow to fill the screen. This is the format used for the vast majority of fiction and text-heavy nonfiction ebooks. The alternative is fixed layout, used only for image-dependent books.

Royalty Rate

The percentage of a sale that goes to the author. For ebooks, KDP offers two tiers:

• 70% royalty for ebooks priced between $2.99 and $12.99 (this ceiling was recently expanded from $9.99). A delivery cost is deducted per sale.
• 35% royalty for ebooks at any price point. No delivery cost deducted.

For print books (since June 2025):

• 60% royalty for books with a list price of $9.99/£7.99 or above, minus printing cost.
• 50% royalty for books priced below that threshold, minus printing cost.
• 40% royalty for expanded distribution sales, minus printing cost.

Here is a critical gotcha that catches many authors: if you price your paperback at $9.98 instead of $9.99, you drop from a 60% to a 50% royalty rate. That one penny costs you 10 percentage points.

Worked example: At a $4.99 ebook price with the 70% royalty, your payout is approximately $3.44 per sale after delivery costs. For a $14.99 paperback with a $3.40 printing cost at 60%, your royalty is roughly $5.59.

Glossary: T

Tax Interview

A mandatory step in KDP account setup. You cannot publish a single title until your tax information shows a status of “Complete.” U.S.-based authors fill out a W-9. Non-U.S. authors complete a W-8BEN. The interview determines whether Amazon must withhold U.S. taxes on your royalties.

By default, the IRS requires Amazon to withhold 30% of royalties earned by non-U.S. persons from U.S. sales. However, the United States has tax treaties with many countries that reduce this to 0%, 5%, or 10%. Completing the tax interview correctly, and claiming your treaty benefit, can make a significant difference in your actual earnings.

One persistent myth that circulates on Reddit’s r/selfpublish: you need an LLC to publish on KDP. This is not true. You can publish as an individual. The LLC question is about personal liability protection and tax structure, not a KDP requirement.

Trim Size

The finished physical dimensions of a printed book, measured in inches (width × height). Common KDP trim sizes include 5"×8", 5.5"×8.5", and 6"×9". Your manuscript PDF must match the trim size you select, and the cover template dimensions change based on trim size and page count. Choosing a non-standard trim size increases printing costs, so most self-publishers stick with one of the popular options.

Glossary: W

Wide Distribution

Publishing your book on multiple platforms beyond Amazon, including Apple Books, Kobo, Barnes & Noble, Google Play, and library channels through distributors like IngramSpark or Draft2Digital. Wide distribution does not require exclusivity. You maintain freedom to sell anywhere.

The tradeoff compared to KDP Select: you lose access to Kindle Unlimited and KDP’s promotional tools, and you need to manage multiple platforms (or use an aggregator). For authors building a long-term career, wide distribution reduces dependence on any single retailer. For new authors in KU-heavy genres, starting exclusive and then going wide after the first 90 days is the most common hybrid approach.

If you are weighing this decision, our guide on publishing on Amazon and other platforms breaks down the pros and cons. Authors interested in reaching audiobook listeners across platforms should also explore audiobook production and distribution as a complementary format.

Quick-Reference Cheat Sheet

Royalty Rates at a Glance

Format	Royalty Rate	Conditions
Ebook (70%)	70% of list price minus delivery cost	Price between $2.99 and $12.99
Ebook (35%)	35% of list price	Any price point, no delivery cost
Print (standard)	60% of list price minus printing cost	List price $9.99 or above
Print (below threshold)	50% of list price minus printing cost	List price below $9.99
Print (expanded distribution)	40% of list price minus printing cost	Sales outside Amazon.com

Print Cost Formula

Fixed Cost + (Page Count × Per-Page Cost) = Printing Cost

Interior Type	Fixed Cost	Per-Page Cost	200-Page Book Total
Black & white	$1.00	$0.012	$3.40
Standard color	$1.00	$0.0255	$6.10
Premium color	$1.00	$0.065	$14.00

Key Thresholds to Remember

• $2.99 to $12.99 ebook price range qualifies for 70% royalty
• $9.99 print list price threshold separates 60% from 50% royalty
• Price your print book at 2.5× to 3× printing cost for a healthy margin

Common Confusions Cleared Up

KDP vs. KDP Select. KDP is the publishing platform. Everyone uses it. KDP Select is an optional exclusivity program. You can self-publish on Amazon without ever touching KDP Select.

Free ISBN vs. own ISBN. The free ISBN from KDP works only on Amazon and lists Amazon as your publisher in industry databases. If you want bookstore distribution, library access, or the flexibility to use the same ISBN elsewhere, buy your own from Bowker. At $125 for a single ISBN, it is an investment worth considering for authors with distribution ambitions beyond Amazon.

Royalty rate is not what you pocket. New authors see “70% royalty” and think they keep 70 cents on every dollar. For ebooks, a delivery fee is deducted first. For print books, the printing cost comes out before your percentage is applied. Always run the math with actual numbers, not just percentages.

The $9.99 print pricing cliff. Setting your paperback at $9.98 instead of $9.99 drops your royalty rate from 60% to 50%. On a book with a $3.40 printing cost, that single penny changes your royalty from roughly $5.59 to about $4.59 on a $14.99 book. Check your pricing carefully.

Review auto-flagging. Practitioners on Reddit noticed a pattern in mid-2025 where Amazon’s automated systems started removing reviews that contained phrases like “free copy” or “advanced reader copy,” even when those reviews were legitimate. This is not documented in any official Amazon policy but is widely discussed in author communities. If you run an ARC campaign, advise your readers to avoid that specific language in their reviews.

Self Publication on Amazon: What Comes Next

This glossary covers the vocabulary. The real challenge is executing well across all of these areas simultaneously: formatting a clean manuscript, designing a genre-appropriate cover, choosing the right ISBN strategy, optimizing metadata, making smart pricing decisions, and marketing your book after it goes live.

The average self-published author spends approximately $2,300 per title on publishing costs. The difference between a profitable book and one that disappears lies not in spending more, but in spending wisely and getting the technical details right the first time.

If managing every piece of self publication on Amazon feels overwhelming, that is because it is a lot. Alpaca Authors offers integrated publishing packages that handle editorial, cover design, ISBN setup, formatting, and distribution to 40+ platforms, all with upfront pricing and full author ownership of rights. See publishing packages and pricing.

Frequently Asked Questions

Is self publication on Amazon really free?

Yes. KDP charges no upfront fees. You will not pay to create an account, upload files, or list your book. Amazon earns money by deducting printing costs (for print books) and delivery costs (for ebooks at the 70% rate) from each sale. Your costs come from producing the book itself: editing, cover design, formatting, and optionally purchasing your own ISBN.

Do I need an LLC to self-publish on Amazon?

No. This is one of the most common myths in the self-publishing community, frequently debunked on Reddit’s r/selfpublish. You can publish on KDP as an individual using your personal tax information. An LLC may be worth considering for liability protection or tax planning reasons, but Amazon does not require one.

How much can I earn per book sale on Amazon?

It depends on format and price. A $4.99 ebook at the 70% royalty rate earns approximately $3.44 per sale. A $14.99 paperback with a $3.40 printing cost at the 60% rate earns about $5.59. Kindle Unlimited page reads typically pay $0.004 to $0.005 per page, so a 300-page book read in full earns roughly $1.35 to $1.50.

Should I use the free KDP ISBN or buy my own?

If you plan to sell exclusively on Amazon, the free ISBN works fine. If you want your book in libraries, bookstores, or distributed through IngramSpark, buy your own. The free KDP ISBN lists Amazon as the publisher of record and cannot be transferred to other platforms.

What is the difference between KDP Select and wide distribution?

KDP Select locks your ebook into Amazon exclusivity for 90-day periods but gives you access to Kindle Unlimited and promotional tools. Wide distribution means selling on multiple platforms (Apple Books, Kobo, B&N, Google Play, and others) without exclusivity. Many authors start with KDP Select, evaluate results after 90 days, then decide whether to stay exclusive or go wide.

How long does it take for a book to go live on Amazon?

Ebooks typically go live within 24 to 72 hours after you hit publish. Paperbacks take 3 to 5 business days. During this time, Amazon reviews your files for compliance with content guidelines and technical specifications. Hardcovers can take slightly longer.

What is the biggest mistake first-time self-publishers make?

Rushing to publish before the book is truly ready. One author on Reddit shared that they discovered years later their uploaded manuscript still contained unedited sections because they had skipped proper editing in their excitement. Beyond that, 78% of self-published authors cite discoverability as their leading challenge, which is usually a metadata and marketing problem rather than a writing problem.

Can I change my book after publishing it on Amazon?

Yes. You can update your manuscript, cover, description, pricing, categories, and keywords at any time through KDP Bookshelf. Updated files typically take 24 to 72 hours to propagate. However, major changes (like a new cover or significant content revision) may temporarily affect your listing’s status during the review process.