How to Use BISAC Codes on Amazon KDP: A Step-by-Step Guide to Better Book Visibility
How to Use BISAC Codes on Amazon KDP: A Step-by-Step Guide to Better Book Visibility
Key Takeaways
Understanding BISAC codes is crucial for authors publishing beyond Amazon, though Amazon KDP now uses its own category system instead of direct BISAC code entry.
• Amazon replaced BISAC selection with direct categories in mid-2023 – Authors now choose from Amazon’s category tree, which automatically maps to BISAC codes in the background for KDP-only books.
• Use all three category slots with maximum specificity – Drill down to the most precise subcategory possible (e.g., “Gardening/Flowers/Orchids” vs. “Gardening/General”) to reduce competition and attract targeted readers.
• BISAC codes still matter for wide distribution – If publishing through IngramSpark or Draft2Digital, you’ll need to select BISAC codes directly as retailers and libraries use them for cataloging and shelving.
• Never mix fiction and non-fiction categories – Keep categories consistent across all formats (ebook, print, audiobook) and never combine incompatible codes like Fiction/Religious with Religion/Christian Living.
• Review categories annually as systems evolve – BISG updates codes yearly, Amazon adds new categories, and reader behaviors shift, making periodic reviews essential for maintaining discoverability.
The bottom line: Proper categorization is your book’s GPS in the marketplace. While it won’t guarantee bestseller status, incorrect categories will guarantee obscurity. Choose wisely, stay specific, and your target readers will find you. 
Can’t get your book noticed on Amazon? BISAC codes might be your missing puzzle piece.
Every book retailer uses BISAC codes[17]. These 9-character alphanumeric identifiers tell retailers, distributors, and librarians where your book belongs[17]. Think of BISAC subject codes as your book’s GPS coordinates in the massive Amazon marketplace.
But here’s where it gets tricky. Amazon replaced BISAC code selection with direct category selection in mid-2023[11]. Many authors are confused about what is BISAC code and how it relates to Amazon’s current system.
We’ll walk you through everything you need to know about BISAC codes for books. We’ll show you how to choose the right BISAC categories and optimize your book’s discoverability on Amazon KDP.
What Is a BISAC Code and Why It Matters for Amazon KDP
Understanding BISAC Subject Codes
BISAC stands for Book Industry Standards and Communications[16]. The Book Industry Study Group maintains this system[1].
Each BISAC code contains nine alphanumeric characters[16]. A code like FIC022020 translates to “Fiction / Mystery & Detective / Police Procedural”[2]. Amazon, bookshops, and libraries all interpret the same code in a similar way[2].
BISAC subject codes function as the book industry’s shared filing system[2]. There are 54 major sections like FICTION, HISTORY, and COMPUTERS[16]. You’ll find detailed subcategories representing specific topics within each major section[16].
The system allows up to four layers of specificity[3]. You start with a broad category and drill down. ANTIQUES & COLLECTIBLES becomes ANTIQUES & COLLECTIBLES / Pottery & Ceramics[18].
Publishers can use BISAC codes without paying fees[1]. You don’t need permission either[1]. The complete list is available online for browsing[1].
How Amazon Uses BISAC Categories
Amazon stopped letting authors select BISAC codes directly. The platform now uses its own category system[2][18].
The system maps your selection to the closest matching BISAC code in the background when you choose an Amazon category[2]. BISAC becomes something you can mostly ignore for books published only on KDP[2].
BISAC matters again the moment you distribute wide[2]. Those services use BISAC codes to catalog your book for shops and libraries beyond Amazon if you publish through IngramSpark or Draft2Digital[2].
The two systems are separate[2]. Your IngramSpark code and Amazon category might not line up exactly. That’s normal, not a mistake[2].
The Effect on Book Discoverability
BISAC codes determine where bookstores shelve physical books[19]. They also control which genres appear in internal databases[19].
Online retailers use these headings for browsable subject pages, feature pages, and customer recommendations[16]. Search engines read BISAC codes to help books appear in relevant searches, so this matters[20].
A mislabeled book has trouble finding its audience[5]. Proper categorization allows readers looking for specific topics to find your book[5].
Wholesalers use BISAC codes to monitor inventory[5]. They carry more fiction and children’s activity books than nonfiction in summer[5]. Accurate codes help them maximize seasonal sales[5].
IngramSpark requires at least one code and recommends three for wide distribution, with the most accurate one first[2].
How to Choose the Right BISAC Codes for Your Book
“If your book is not listed where your intended readers would expect to find it, then your sales will struggle, no matter how good your writing is.” — Ricardo Fayet, Co-founder and Chief Marketing Officer of Reedsy
Picking the right BISAC categories separates findable books from invisible ones.
Step 1: Access the BISAC Subject Headings List
Visit the Book Industry Study Group website. The complete BISAC Subject Headings List sits there, free to browse[21]. No fees. No permission needed[1].
Click through the major headings arranged alphabetically. Each opens into detailed subcategories. You can search or scroll, but take your time with this step.
Step 2: Identify Your Primary Category
Your primary BISAC code should reflect your book’s main subject[4]. Ask yourself what the book is about at its core.
A biography about Charles Lindbergh’s aviation career gets BIOGRAPHY & AUTOBIOGRAPHY / Aviation & Nautical as its primary code. Had the book focused on his child’s kidnapping instead, TRUE CRIME / Abductions would work better[4].
Think about how your target readers would search. Match their expectations[8].
Step 3: Select Specific Subcategories
Drill down to the most specific code possible[14]. HEALTH & FITNESS / Diet & Nutrition / Weight Loss beats HEALTH & FITNESS / General every time.
Specific codes attract targeted readers. Targeted readers buy books[14]. Skip “General” codes unless nothing else fits[9].
Step 4: Choose Your Three BISAC Codes
You can select up to three BISAC categories[10]. Books are seldom about just one thing[14].
Pick codes that describe your book’s complete content. Don’t select a code for one chapter or a minor theme[14]. Be honest. Fiction gets fiction codes. Nonfiction gets nonfiction codes. Never mix them[14].
Step 5: Rank Your Codes by Priority
List your codes by importance. Some retailers only read the first one[9].
Your primary code carries the most weight. Secondary codes broaden your reach to additional reader segments[8]. Keep BISAC codes the same across ebook, print and audiobook formats[10].
How to Enter BISAC Codes on Amazon KDP
Amazon changed everything in mid-2023. You don’t enter BISAC codes anymore[11].
Setting Up Your Book Categories in KDP
Go to your Bookshelf. Click the ellipsis button next to your book title. Select Edit details[12].
Scroll to the Categories section on the Details tab. Click Choose categories or Edit categories[12]. A new window opens and shows Amazon’s full category tree.
You get three category slots per format[12]. Use all three. Click through the hierarchy starting with broad categories like Fiction or Business. Drill down to the most specific subcategory that fits your book.
Save your changes and submit for publication. Categories take up to 72 hours to display[12].
Understanding Amazon’s Category System
Authors selected amazon bisac codes before 2023. Amazon translated those into store categories. The process was clunky and frustrating[11].
Amazon now shows you the exact categories readers browse[12]. What you select is what displays. BISAC codes get derived in the background[11].
Then BISAC subject codes matter only if you distribute beyond Amazon through IngramSpark or other channels[11]. Focus on Amazon categories for KDP-only publishing.
Best Practices for Category Selection
Research before choosing. Search for books like yours on Amazon. Check their categories in the Product Details section[12].
Pick accurate categories that reflect your actual content[12]. Amazon’s algorithm monitors your metadata and may change your placement if keywords don’t match[6]. Balance popularity with relevance[12]. Broader categories attract more traffic but bring fiercer competition.
Categories update from time to time. Amazon adds new ones and retires old ones[7]. Review your placement now and then.
Common Mistakes to Avoid When Using BISAC Codes
Wrong BISAC categories sink books faster than bad covers.
Choosing Categories That Are Too Broad
“General” wastes a category slot[4]. Broad categories bury your book under thousands of competitors[13]. FICTION / General contains hundreds of thousands of titles. Your book drowns there.
Use the most specific code available[4]. GARDENING / Flowers / Orchids beats GARDENING / General every time[14]. Pick broad codes only when nothing else fits[15].
Using Non-Fiction Categories for Fiction Books
Never mix FICTION and NON-FICTION codes on the same title[14]. FICTION / Religious and RELIGION / Christian Living / General cannot coexist[14]. One corrupts the other.
Age categories follow the same rule. Don’t combine Juvenile, YA, and Adult codes[16]. Target your original audience and stick with it[15].
Mismatching Categories Across Formats
Your ebook, print, and audiobook need similar BISAC codes[15]. Different codes confuse tracking systems[15]. Marketing teams lose data and retailers mis-shelve your book.
Consistency matters more than perfection.
Ignoring Category Updates
BISG updates codes annually[4]. Review your backlist titles once a year[15]. Codes get inactivated and new ones appear. Outdated codes hurt your chances of being found.
Reader behaviors move. Retail algorithms change[15]. Your 2023 categories might fail in 2026.
Conclusion
You now have what you need to categorize your book. Amazon categories determine your book’s visibility, while BISAC codes matter only if you distribute wide through IngramSpark or similar platforms.
Pick specific categories that match your content and use all three slots. Review your selections annually as codes and reader behaviors change.
Proper categorization won’t guarantee bestseller status. Wrong categories will guarantee obscurity. Choose wisely and your target readers will find you.
FAQs
Q1. What are BISAC codes and why do they matter for self-published authors? BISAC codes are 9-character alphanumeric identifiers that tell retailers, distributors, and librarians where your book belongs. They function as the book industry’s shared filing system, helping bookstores shelve physical books and online retailers organize books into browsable categories. While Amazon now uses its own category system instead of direct BISAC code selection, these codes still matter if you distribute your book beyond Amazon through platforms like IngramSpark or Draft2Digital.
Q2. How do I choose the right categories for my book on Amazon KDP? Start by researching books similar to yours on Amazon and checking their categories in the Product Details section. Navigate to your KDP Bookshelf, click Edit details, and select the Categories section. You can choose up to three categories per format—use all three slots. Pick the most specific categories that accurately reflect your book’s content rather than broad “General” categories, as specific categories help targeted readers discover your book more easily.
Q3. What are the most common mistakes authors make with book categorization? The biggest mistakes include choosing categories that are too broad (like “Fiction / General”), mixing fiction and non-fiction codes on the same title, using different categories across ebook and print formats, and never updating categories as codes change annually. Authors should also avoid selecting categories based on minor themes or single chapters—your categories should reflect your book’s main subject matter.
Q4. How can I improve my book’s visibility on Amazon after publishing? Focus on getting genuine reviews from readers interested in your subject matter, run Amazon ads with targeted keywords, ensure your book has a professional cover and compelling description, and use all available category slots. The Amazon algorithm pushes books that are already selling, so paid advertising and proactive promotion are often necessary to generate initial sales momentum. Free download promotions don’t count toward paid sales rankings, so they won’t significantly improve visibility.
Q5. Do I still need to worry about BISAC codes if I only publish on Amazon KDP? If you publish exclusively on Amazon KDP, you can largely ignore BISAC codes since Amazon automatically derives them from the categories you select. However, BISAC codes become important again if you distribute your book through other channels like IngramSpark, Draft2Digital, or to libraries and bookstores beyond Amazon. For wide distribution, you’ll need to select appropriate BISAC codes that match your content.
References
[1] – https://www.bisg.org/BISAC-Subject-Codes-main
[2] – https://www.ebookpbook.com/2026/06/01/kdp-categories-keywords-explained/
[3] – https://indieauthorblueprint.substack.com/p/the-art-of-choosing-kdp-book-categories
[4] – https://www.bisg.org/selecting-a-BISAC-code
[5] – https://greenleafbookgroup.com/learning-center/book-distribution/understanding-the-difference-between-bisac-codes-amazon-categories
[6] – https://kindlepreneur.com/how-to-choose-the-best-kindle-ebook-kdp-category/
[7] – https://cambridgepublishinghouse.com/blogs/amazon-book-categories-keywords-guide
[8] – https://www.linkedin.com/pulse/how-choose-right-bisac-categories-your-book-michele-defilippo-hxxsc
[9] – https://www.supadu.com/blogs/news-and-views/top-tips-to-help-you-navigate-the-bisac-selection-process
[10] – https://publishdrive.com/bisac-codes-category-amazon.html
[11] – https://www.vappingo.com/word-blog/kdp-categories-vs-bisac/
[12] – https://kdp.amazon.com/help/topic/G200652170
[13] – https://www.autocrit.com/choosing-the-right-book-category/
[14] – https://www.ingramspark.com/blog/bisac-subject-codes
[15] – https://firebrandtech.com/resources/metadata-minute-issue-29-common-publisher-questions-about-bisac-codes
[16] – https://www.bisg.org/BISAC-FAQ
[17] – https://scribemedia.com/blog/bisac-codes
[18] – https://blog.lulu.com/bisac-what-it-is-and-why-it-matters/
[19] – https://www.bisg.org/subject-codes-committee
[20] – https://authornews.penguinrandomhouse.com/bisacs-cracking-the-code/
[21] – https://www.bisg.org/complete-bisac-subject-headings-list
