BISAC codes were the foundation of KDP’s old category system. Amazon now handles category selection differently — but BISAC still matters for authors distributing through Ingram and other channels. Here is what you need to know.
| 8-minute read | Beginner |
BISAC codes are the publishing industry’s standard book classification system — used across all major retailers, distributors, and library systems to catalogue and classify books consistently. For KDP authors publishing exclusively on Amazon, they are now largely a background concern. For authors distributing print books through IngramSpark or other wholesale channels, understanding BISAC codes remains directly relevant. For the full category foundation, see our complete guide to Amazon KDP categories.
What BISAC Codes Are
BISAC stands for Book Industry Standards and Communications. BISAC codes are maintained by the Book Industry Study Group and provide a standardised language for book classification that works consistently across Amazon, Barnes & Noble, Ingram, Kobo, Apple Books, and public library cataloguing systems. The most common BISAC subject headings include: FIC (Fiction), SEL (Self-Help), BUS (Business & Economics), HEA (Health & Fitness), BIO (Biography & Autobiography), SCI (Science), JUV (Juvenile Fiction), YAF (Young Adult Fiction).
The Code Structure
A BISAC code consists of a three-letter subject heading abbreviation, a six-digit numeric code, and a descriptor. For example: FIC022020 — FIC (Fiction), 022 (Mystery & Detective), 020 (Cosy). The subject heading identifies the broad category; the numeric code identifies the specific subcategory; together they provide a unique classification for every defined genre and topic combination in the system. The full list of BISAC codes is publicly available and updated annually by the Book Industry Study Group.
BISAC Codes in KDP Today
Since mid-2023, BISAC codes are no longer directly selected in KDP’s publishing interface. Authors choose Amazon store categories directly — the same categories readers browse on Amazon — and Amazon automatically derives the corresponding BISAC code from that selection. You do not choose a BISAC code; you choose a category, and the BISAC mapping happens automatically behind the scenes.
For Kindle ebook publishing, the BISAC code that Amazon derives is invisible metadata used for industry classification. It has no direct impact on your Amazon discoverability, bestseller ranking, or browse visibility — those are determined by the Amazon store category system.
When BISAC Codes Matter
BISAC codes become directly relevant when you distribute your print book through IngramSpark, Draft2Digital’s print distribution, or other wholesale channels. In these environments, BISAC codes are the primary classification system used to catalogue your book in retailer and library databases. A precisely chosen BISAC code — which comes from choosing the most specific applicable Amazon category in KDP — ensures your book is correctly classified in the wider book trade.
If you are distributing exclusively through KDP with no plans for Ingram or wide distribution, BISAC codes require no active attention from you. The automatic mapping from your category selection handles it.
How BISAC Codes Are Derived From Your Category
The most specific Amazon store category you select maps to the most specific applicable BISAC code. Choosing Books > Mystery, Thriller & Suspense > Mystery > Cosy Mysteries maps to FIC022020 (Fiction / Mystery & Detective / Cosy). Choosing the broad Books > Mystery, Thriller & Suspense maps to the much broader FIC022000 (Fiction / Mystery & Detective / General). This is one more reason to always choose the deepest applicable category: specificity serves your Amazon ranking, your IngramSpark classification, and your library cataloguing simultaneously.
Your category strategy brings the right readers to your book. Manuscript proofreading before publishing from Vappingo ensures the content those readers find is error-free and publication-ready.
