How to Choose KDP Categories: A Step-by-Step Guide

To choose KDP categories, list exactly what your book is, study where similar books are ranked on Amazon, then pick categories that describe your book accurately. Mix one or two narrow categories, where you have a real chance of appearing near the top, with a broader one that fits. Enter them in the KDP setup screen for each format, then check after launch that your book landed where you meant it to.

This guide walks through that process in order. It also explains how Amazon's categories differ from BISAC codes and how to avoid the mistakes that bury a book in the wrong place.

What do you need before you start?

Have these ready before you open the categories screen in KDP:

• A one-sentence description of your book. Include the genre, subgenre and audience. Example: "A cozy small-town mystery for adults with an amateur sleuth and no graphic violence."
• Your format list. Ebook, paperback, or both. Each format has its own category settings in KDP.
• Your main marketplace. Category trees differ between Amazon stores, such as Amazon.com and Amazon.co.uk. Decide which store you care about most.
• Five to ten comparable books ("comps"). These are recent books a reader of yours would also buy. They should be similar in tone and audience, not just in topic.
• A draft of your keywords and description. Categories, keywords and your blurb all work together, so it helps to see them side by side.

If you haven't set up your KDP account or title yet, start with how to publish a book on Amazon and come back to this step.

What's the difference between BISAC codes and Amazon categories?

These two systems are often confused because KDP used to ask for one and now uses the other.

BISAC is an industry-wide subject code system maintained by the Book Industry Study Group. Each code has a short ID and a label, such as a fiction mystery subject. Most bookstores, distributors and libraries use BISAC to file books. See what a BISAC code is for the basics, or what BISAC codes are and how they're used for more detail.

Amazon categories are Amazon's own browse tree. They're what shoppers click through on the site, and they're where Amazon's category bestseller lists live. They are often more specific than BISAC. Some are built around themes, settings or character types that BISAC doesn't cover.

In the current KDP setup, you choose Amazon categories directly from Amazon's browse tree. In the past, KDP asked for BISAC codes and then mapped them onto Amazon categories. You'll still see older advice that describes the BISAC-based process, so check which version a guide is describing.

	BISAC codes	Amazon categories
Who maintains it	Book Industry Study Group	Amazon
Where it's used	Most retailers, distributors, libraries, ONIX metadata	Amazon store browsing and bestseller lists
How specific	Broad-to-moderate subject codes	Often very specific subgenres and themes
Same in every country?	Largely standard (some regions use their own schemes)	Differs by Amazon marketplace
Where you enter it	IngramSpark, Draft2Digital, Apple Books, Kobo, others	KDP title setup (ebook and paperback separately)

If you publish beyond Amazon, you'll need both. Pick your Amazon categories for KDP, and choose BISAC codes for stores like IngramSpark or Draft2Digital. If you write with Inkora, the publishing kit includes suggested BISAC categories alongside a description and keywords. You can use these as a starting point and adjust them to your final book.

How do you choose KDP categories, step by step?

Step 1: Define your book in reader terms

Write down how a reader would describe your book, not how you'd pitch it to an agent. Cover four things:

1. Genre: romance, thriller, self-help, cookbook.
2. Subgenre or topic: paranormal romance, legal thriller, productivity for freelancers, vegetarian weeknight meals.
3. Audience: adult, young adult, middle grade, children by age band; beginner or advanced for non-fiction.
4. Key reader signals: for fiction, tropes, setting, heat level or tone. For non-fiction, the problem solved and who has it.

This list becomes your filter. Any category that contradicts it is out, however easy it looks.

Step 2: Look up where your comps are listed

Open each comparable book's Amazon product page and scroll to the product details. The Best Sellers Rank line shows the book's overall rank and some of the categories it ranks in.

Write down every category that appears. Pay attention to categories that show up across several comps. That repetition tells you where readers of your kind of book shop.

Check the ebook and paperback pages separately. They can sit in different categories.

Step 3: Browse the category tree yourself

Product pages only show some of a book's categories. To see the whole picture, go to the Amazon Best Sellers pages for books or Kindle eBooks in your chosen marketplace. Click down through the tree from the genre to the narrowest relevant level.

For each candidate category, ask:

• Would my ideal reader click this?
• Do the top 20 books look like mine in cover style, tone and promise?
• Would a reader who found my book here feel misled?

If the top books look nothing like yours, skip that category even if the label seems to fit.

Step 4: Gauge how competitive each category is

Click into a few of the top-ranked books in each candidate category and note their overall Best Sellers Rank. A lower number means the book is selling more relative to the rest of the store.

Compare categories against each other:

• If even the books near the bottom of the top 20 have very strong overall ranks, the category is competitive. A new book will struggle to be seen there.
• If the books around the bottom of the top 20 have much weaker overall ranks, a modest number of sales could put your book on that list.

Ranks change often, sometimes hourly, so look at each category on more than one day before deciding. Don't rely on a single snapshot.

Step 5: Choose a mix of narrow and broad

Aim for a balanced set:

• One or two narrow categories where your book is an exact match and the competition is manageable. This is where you're most likely to appear on a bestseller list and be found by browsers.
• One broader category that accurately describes the book. This places it among the wider genre, even if ranking high there is unlikely at first.

The next section covers this trade-off in more detail.

Step 6: Enter your categories in KDP

In your KDP title setup, find the Categories section on the details page and open the category selector. Choose your marketplace if prompted, then click through the tree to select each category.

At the time of writing, KDP lets you choose up to three categories per format. Confirm the current limit in the setup screen, since Amazon has changed this process before. Repeat the selection for your paperback, because it's set separately from the ebook. The Amazon KDP publishing guide covers where categories fit among the other setup fields. Inkora's Publishing Hub also has a step-by-step KDP checklist, though you enter the categories in your own KDP account.

Step 7: Align your keywords and description

Categories tell Amazon where to file the book. Keywords and your description help confirm that placement and help readers find you in search.

Use your seven keyword slots for phrases readers type that your categories don't already cover, such as tropes, settings or specific problems. Make sure your description's opening lines make the genre obvious. For help, see how to write a book blurb and the KDP description formatter.

Step 8: Check your placement after launch

Once the book is live, open its product page and check the Best Sellers Rank section. It can take a little time for ranks and categories to appear.

If your book shows up in categories you didn't pick, or is missing from ones you did, see the problems section below. You can edit categories later from your KDP bookshelf by editing the book's details.

Should you pick narrow or broad categories?

Narrow categories give visibility. Broad categories give context. Most books benefit from both, as long as every category is accurate.

	Narrow category	Broad category
Example (fiction)	A specific romance subgenre with a particular theme	Romance overall
Example (non-fiction)	Time management for a specific profession	Self-help
Chance of ranking on the bestseller list	Higher, if the fit is exact	Lower for most new books
Who finds you	Readers who want exactly this	Readers browsing the genre
Main risk	Too niche to have browsing traffic, or a poor fit	Book disappears among bestsellers

Two cautions apply here.

First, a category being small isn't enough reason to choose it. Some tiny categories are small because almost nobody browses them, so ranking first there brings few readers.

Second, "narrow" must still mean "accurate." Putting a thriller in an obscure non-fiction category to grab a bestseller tag misleads readers. KDP's content guidelines expect categories to reflect your book. Misplacement can lead to reader complaints, poor reviews or action from Amazon.

How do categories set reader expectations?

A category is a promise. A reader browsing a cozy mystery list expects a puzzle, a likable sleuth and little gore. If they find a dark psychological thriller, they may stop reading or leave a frustrated review, even if the book is good.

To keep the promise consistent:

• Match your cover to the category. Look at the top books in your main category and notice the shared visual cues, such as typography, color and imagery. Your cover should look like it belongs there. See AI book cover design for practical guidance.
• Match your title and subtitle. Non-fiction subtitles should state the topic and the reader. Fiction titles should feel at home in the genre. How to choose a book title covers this.
• Match the audience level. Children's and teen categories should match the age range you state in KDP. Books with adult content shouldn't sit in categories aimed at younger readers.
• Match the content, not the aspiration. If your book is a beginner's guide, place it where beginners browse, not alongside advanced professional texts.

When every part of your metadata tells the same story, the right readers click and the wrong ones scroll past. That leads to better reviews and steadier sales.

Common problems and fixes

Your book appears in a category you didn't choose. Amazon may add or adjust placements based on your book's content and metadata. If the extra category is accurate, you can leave it. If it's wrong, review your keywords and description for phrases that point elsewhere. If the problem persists, contact KDP support through your dashboard and explain which category is incorrect.

Your chosen category isn't showing on the product page. Categories only appear in the Best Sellers Rank section once the book has a rank there, which usually requires some sales. Also, the product page may only display a few categories. Double-check your selections in KDP. If they're saved correctly and still missing after some time, ask KDP support to confirm the placement.

Your book is ranked in the wrong marketplace's version of a category. Category trees differ by store. A category you picked for one marketplace may not exist or may map differently elsewhere. Check your book's page in each major marketplace you sell in.

You picked a category that's far too competitive. Swap it for a narrower, accurate alternative using the process in Steps 3 and 4. Edit your book's details in KDP, update the category and republish the details. Your reviews stay attached to the book.

Readers say the book isn't what they expected. This usually signals a category or cover mismatch. Reread the reviews to find the gap, such as tone, heat level, age band or depth. Then move the book to categories where that expectation fits, and consider whether the cover and description need updating too.

Your ebook and paperback are in different categories by accident. Each format has its own category settings. Open each format in your KDP bookshelf and align them, unless you have a deliberate reason to differ.

You're unsure which BISAC codes to use for other stores. Start from your Amazon category choices and find the closest BISAC subject. Then check how comparable books are classified on the other retailer. The self-publishing overview explains how wider distribution fits together.

Good category choices come from knowing your book in reader terms and checking where similar books really sell. Pick accurate categories, balance narrow and broad, and review your placement after launch. That way your book sits where the right readers are already looking.