Everything you need to know about Amazon KDP categories and BISAC codes
What are Amazon KDP categories?
Amazon KDP categories (also called browse categories) are the virtual shelves where Amazon places your book. When a reader browses 'Science Fiction > Space Opera' or 'Self-Help > Motivational', they're browsing categories. Amazon allows you to select up to 3 categories when publishing. Being in the right categories means your book shows up when readers browse topics they're interested in — and it determines which bestseller lists you can rank on.
How many categories can I choose on KDP?
When you first publish on KDP, you can select up to 3 browse categories. However, you can request up to 10 total categories by contacting Amazon Author Central support after your book is live. Email them with your ASIN, book title, and the exact category paths you want. Most requests are approved within 3-5 business days. Having more categories means more discovery paths for readers to find your book.
What are BISAC codes and do I need them?
BISAC (Book Industry Standards and Advisory Committee) codes are the universal classification system used by the book industry — bookstores, libraries, distributors like IngramSpark, and metadata services all use BISAC to categorise books. While Amazon uses its own browse category system (which overlaps with but differs from BISAC), you'll need BISAC codes if you distribute through IngramSpark, want library placement, or sell through traditional bookstores. Our tool maps Amazon categories to BISAC codes so you're covered for all distribution channels.
How do I change my book's categories after publishing?
You can change categories through two methods: (1) Edit your book details in your KDP dashboard — this lets you modify your initial 3 category selections at any time. (2) For additional categories beyond 3, email Author Central support at amazon-author-central@amazon.com with your ASIN and the exact category paths. You can also remove categories the same way. Changes typically take 24-72 hours to reflect on your listing.
What's the difference between a browse category and a BISAC code?
Browse categories are Amazon's proprietary classification system — they're the categories readers see when browsing the Kindle Store. BISAC codes are an industry-wide standard maintained by BISG. While there's significant overlap (many Amazon categories map directly to BISAC codes), Amazon has more granular subcategories in some areas and fewer in others. For example, Amazon has specific romance subcategories like 'Billionaire Romance' that don't have direct BISAC equivalents. Our tool shows both systems so you can optimise for all platforms.
Should I choose competitive or niche categories?
The optimal strategy is a mix: one competitive category for maximum visibility and two niche categories where you have a realistic shot at the bestseller badge. The orange '#1 Best Seller' badge is one of Amazon's most powerful conversion tools — it increases click-through rates by 20-30%. Check the #1 book in your target category: if it has fewer than 50 reviews, the category is likely achievable. Our tool shows competition levels to help you balance visibility with bestseller potential.
How does this tool work?
Our tool uses Google's Gemini AI, trained on extensive book industry data, to analyse your book's title, genre, synopsis, and comparable titles. It cross-references this with a database of BISAC codes and Amazon KDP browse categories to recommend the most relevant and strategically optimal categories. It also assesses competition levels and provides a strategy for which 3 categories to select first. The AI understands category nuances across all 5 major Amazon marketplaces (US, UK, Canada, Australia, Germany).
Do different Amazon marketplaces have different categories?
Yes, each Amazon marketplace has its own category tree that can differ significantly. Amazon.com (US) has the most granular categories — for example, it breaks romance into 20+ subcategories. Amazon.co.uk and Amazon.de have fewer subcategories in some genres but may have unique categories for local content. Our tool lets you select your target marketplace to get recommendations specific to that store's category structure.
Can I request additional categories from Amazon?
Yes! After your book is published, you can email Author Central support to request placement in additional categories — up to 10 total. Include your ASIN, book title, and the exact category browse paths (e.g., 'Kindle Store > Kindle eBooks > Science Fiction & Fantasy > Fantasy > Epic'). Our tool provides these exact paths in a copy-paste-ready format. Most category addition requests are approved within a few business days.
How often do Amazon categories change?
Amazon updates its category tree periodically — typically a few times per year — adding new categories, merging others, and reorganising subcategories. Major changes are often tied to seasonal trends or emerging genres (for example, 'LitRPG' was added as a category after the genre gained popularity). We recommend revisiting your category strategy every 3-6 months or whenever you notice changes in your bestseller rankings. Our AI stays current with the latest category structure.
Amazon categories are one of the most overlooked yet powerful levers in your self-publishing strategy. While most authors obsess over covers and descriptions, the right category placement determines whether your book appears in front of the right readers at all. Categories affect three critical things: which bestseller lists you can rank on, which "also bought" recommendations your book appears in, and which browse pages display your book to interested readers.
The difference between choosing the right and wrong categories can be dramatic. An epic fantasy novel placed in the general "Literature & Fiction" category competes with millions of books. The same book in "Science Fiction & Fantasy > Fantasy > Epic" competes with thousands — and has a realistic chance of earning the coveted orange "#1 Best Seller" badge that boosts click-through rates by 20-30%.
KDP Category Strategy
The Bestseller Badge
Amazon's orange #1 Best Seller badge is a massive conversion booster. To earn it, you need to be #1 in at least one category. Choose one niche category where you can realistically reach #1 — even briefly — to gain this social proof.
The 1-2 Split
The optimal strategy: 1 broad category for visibility (where thousands of readers browse daily) and 2 niche categories for bestseller potential. This gives you both discovery volume and ranking achievability.
Beyond the Initial 3
Don't stop at 3 categories. After publishing, contact Author Central to add up to 10 total. More categories mean more browse pages, more "also bought" connections, and more paths for readers to discover your book organically.
BISAC Codes vs Amazon Categories
BISAC codes are the industry standard
Used by IngramSpark, libraries, bookstores, and metadata services worldwide. If you distribute beyond Amazon, you need BISAC codes. There are approximately 4,000 codes maintained by BISG.
Amazon categories are Amazon-specific
Amazon's browse tree has its own structure that overlaps with but differs from BISAC. Some Amazon categories (like 'Billionaire Romance' or 'LitRPG') don't have direct BISAC equivalents.
You need both for maximum reach
Use Amazon categories for your KDP listing. Use BISAC codes for IngramSpark, library distribution, and bookstore placement. Our tool provides both so you're covered for all channels.
Category updates happen at different speeds
BISAC codes are updated annually by the BISG committee. Amazon's categories change more frequently — sometimes monthly — as new genres emerge or existing categories are reorganised.
Matching isn't always 1:1
A single Amazon subcategory might map to several BISAC codes, or a BISAC code might span multiple Amazon categories. Our AI finds the closest matches and explains any gaps.
Our launch strategists optimise categories, keywords, pricing, and pre-orders to give your book the strongest possible debut — backed by data from hundreds of successful launches.
