KDP Categories: How to Choose the Right Amazon Category to Rank #1
One of the most underutilized strategies in Amazon KDP publishing is category selection. Most authors pick the first two categories that seem relevant and move on. But savvy publishers know that choosing the right categories — especially low-competition ones — can catapult a book to #1 Bestseller status with far fewer sales than you'd expect. In this guide, we'll show you exactly how to research, select, and even request additional categories to maximize your book's visibility and bestseller potential.
1
Amazon organizes books into a hierarchical category system with thousands of subcategories. Each book can be listed in up to 10 categories (though KDP only shows 2 during upload — more on that later). Categories range from broad (Books > Business & Money) to highly specific (Books > Business & Money > Entrepreneurship > Home-Based Businesses). The more specific the category, the less competition — and the easier it is to rank #1. A book that sells 5 copies a day might never crack the top 100 in 'Business,' but could easily hit #1 in 'Home-Based Business for Beginners.'
2
The key metric to look at is the BSR (Best Seller Rank) of the #1 book in a category. A lower BSR number means more sales are needed to rank #1. If the #1 book in a category has a BSR of 500, you'll need hundreds of daily sales to compete. But if the #1 book has a BSR of 50,000, you might only need 1–2 sales per day to claim the top spot. Use Amazon's search to browse categories, click on the #1 bestseller, and check its BSR in the product details. Aim for categories where the top book has a BSR above 20,000 for the easiest path to #1.
3
Here's a little-known KDP hack: you can request up to 10 categories for your book by contacting Amazon KDP support directly. During the upload process, you only select 2 categories. But after publishing, you can email KDP support with your book's ASIN and a list of up to 10 categories you want to be listed in. Amazon will usually add them within 24–48 hours. This dramatically increases your book's discoverability and gives you more chances to rank #1 in multiple categories simultaneously. Many bestselling authors use this strategy to maintain multiple #1 badges.
4
While it's tempting to choose only the lowest-competition categories, your book must genuinely fit the category. Amazon monitors category relevance and can remove books from categories they don't belong in. The best strategy is to find the intersection of relevance and low competition. Start by listing all categories your book could legitimately fit in, then research the competition level of each. Prioritize categories where your book is a strong fit AND the competition is manageable. This approach is both ethical and sustainable for long-term rankings.
5
BISAC (Book Industry Standards and Communications) codes are the standardized category codes used in publishing. When you upload to KDP, you select BISAC codes that map to Amazon categories. Understanding this mapping can help you target specific Amazon categories more precisely. Some BISAC codes map to multiple Amazon categories, giving you more exposure. Research which BISAC codes correspond to your target Amazon categories before uploading. Tools like Publisher Rocket provide BISAC-to-Amazon category mapping, making this research much faster.
6
Category competition changes over time as new books enter the market. A category that was easy to rank in 6 months ago might be much more competitive today. Check your category rankings monthly and be prepared to request category changes if needed. If you're consistently ranking outside the top 20 in a category, consider requesting a switch to a less competitive alternative. Also watch for new subcategories Amazon creates — these are often goldmines of low competition when they first launch. Stay proactive with your category strategy and treat it as an ongoing optimization effort.
Key Takeaways
Choosing the right Amazon KDP categories is one of the highest-leverage actions you can take as a self-published author. By targeting low-competition subcategories, requesting up to 10 category placements, and continuously monitoring your rankings, you can achieve #1 Bestseller status with far fewer sales than you might think.
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KDP Optimizer Team is a book marketing specialist with over 10 years of experience helping authors succeed on Amazon KDP. Passionate about data-driven strategies and author empowerment, KDP shares actionable insights to help writers reach more readers and increase book sales.
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