What BISAC Categories Should I Choose?

Pick the most specific codes that honestly describe your book, chosen by looking at where comparable titles actually sit. Specificity beats breadth: a narrow category with fewer competing titles gives you visibility and a realistic shot at a bestseller badge, while a broad one buries you. Never choose a category your book doesn't genuinely belong in — it converts badly and generates returns and poor reviews.

The longer version

BISAC — Book Industry Standards and Communications — is the subject classification system maintained by the Book Industry Study Group and used across the North American book trade. Each code has a three-letter prefix and a hierarchy, like:

FIC027220   FICTION / Romance / Romantic Comedy

Retailers map their own browse structures onto BISAC, which is why the code you choose affects where readers find you.

The method

1. Find your comparable titles. Five to ten books that a reader of yours would also buy — similar tone, length, audience, published in the last two or three years.

2. Look at where they're actually categorized. On a retailer page, the "Best Sellers Rank" section lists the categories a book sits in. This is real data about what works in your genre, and it's free.

3. Go as specific as you can honestly go. FICTION / Fantasy contains hundreds of thousands of titles. FICTION / Fantasy / Romantic is a real place a reader browses. The narrower category is easier to rank in, and readers who browse it are closer to buying.

4. Choose codes that don't overlap. Three near-identical categories waste two slots. Pick a primary that's the truest fit, then use the others to reach an adjacent audience you legitimately serve.

5. Check whether the category has a live audience. A category so obscure that its #1 book has a poor sales rank isn't a win — being top of an empty shelf sells nothing.

The honesty constraint

It's tempting to select a low-competition category your book only loosely fits, in order to grab a badge. Two reasons not to:

Readers who browse that category expect that kind of book. They buy, they're disappointed, and they leave a review saying so. That review outlives the badge
Retailers do recategorize books they consider misplaced, and there's no appeal worth the effort

Non-fiction specifics

Non-fiction categorization is generally more consequential than fiction, because buyers browse by problem. Pick the code matching the reader's problem, not your professional discipline. A book on team communication might belong in BUSINESS & ECONOMICS / Management rather than PSYCHOLOGY / Social Psychology, depending entirely on who you want to reach.

BISAC versus retailer categories

They're related but not the same, and this trips people up:

BISAC is the industry standard, used by distributors, IngramSpark, and most wide channels
Amazon has its own browse structure. In KDP you select up to three categories per format from Amazon's own list — not by entering BISAC codes directly. Amazon maps between the two behind the scenes
Outside North America, BIC and Thema are common. Thema is the international standard and is gradually displacing BIC in the UK and Europe

So a wide-distributed book may need BISAC codes for Ingram and Amazon categories for KDP, and they won't be identically named.

Common exceptions

BISAC codes are revised annually. A code you used three years ago may be deprecated. The current list is published by BISG.
Some Amazon categories require specific keywords to qualify. Amazon documents which.
Ebook and print are separate records and can carry different categories, though divergence is usually a mistake.
Categories are editable after publication, at no cost. A poorly categorized book is a fixable problem — this is the cheapest lever in indie publishing.

Sources

Book Industry Study Group, BISAC Subject Headings (current edition).
EDItEUR, Thema subject categories.
Amazon KDP Help, "Categories."

Verified 9 August 2026.

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