How to Change Your KDP Categories (Step by Step)

You can change your KDP categories in two ways: through your KDP Bookshelf by editing your book's details, or by contacting Amazon support directly to request categories that aren't available in the dashboard. The second method is the one most authors don't know about, and it's the one that actually unlocks the best-selling categories for your book.

Why Your KDP Categories Matter More Than You Think

Amazon uses categories to determine where your book shows up in the store. Pick the wrong ones and you're invisible. Pick the right ones and you could hit a bestseller tag with as few as 10-20 sales per day.

Here's the thing: KDP only gives you access to a fraction of Amazon's full category tree during the publishing process. There are over 16,000 categories on the Kindle store. Your KDP dashboard shows you maybe a few hundred. The best categories, the ones with low competition and real reader traffic, often aren't available through the standard dropdown menus.

That's why knowing how to change your categories after publishing is so important.

Method 1: Change Categories Through Your KDP Bookshelf

This is the straightforward approach. Here's exactly what to do:

1. Log in to your KDP account and go to your Bookshelf.
2. Find the book you want to update and click the "..." (ellipsis) button next to it.
3. Select "Edit eBook Details" (or "Edit Paperback Details" for print).
4. Scroll down to the "Categories" section.
5. Click "Set Categories" to open the category browser.
6. Remove your current categories and select new ones. You can choose up to three.
7. Click "Save and Continue" and publish through to the end.

Your changes will typically go live within 24 to 72 hours. Sometimes faster.

The limitation here is obvious: you can only pick from the categories Amazon shows you in that interface. And those categories don't always match what you see when browsing the actual Kindle store.

Method 2: Contact Amazon Support for Hidden Categories

This is the method that experienced KDP authors use. Amazon allows you to request up to 10 categories per book by emailing their support team. Yes, ten. Not the three you get through the dashboard.

Here's the process:

1. Go to the Amazon KDP Help page and click "Contact Us."
2. Choose the book you want to update.
3. Select the topic related to "Amazon store page" or similar.
4. In your message, provide your book's ASIN, title, and the exact category paths you want to be added to.
5. Be specific. Write out the full category string, like: Kindle Store > Kindle eBooks > Mystery, Thriller & Suspense > Mystery > Hard-Boiled
6. Submit and wait. It usually takes 1 to 5 business days.

A few tips to make this go smoothly: be polite, list everything clearly, and don't ask for categories that are completely irrelevant to your book. Amazon can reject requests if the category doesn't match your content.

How to Find the Best Categories for Your Book

Picking categories is part research, part strategy. You want categories where:

• The #1 bestseller has a sales rank you can realistically compete with
• There's actual reader traffic (not a dead category nobody browses)
• Your book genuinely fits the genre expectations

One approach is to look up competing books in your niche, scroll down to their product page, and check which categories they rank in. Then note down the full category paths.

If you want to skip the manual digging, PublishRank's Category Optimizer lets you search and compare KDP categories by competition level and browse node data. It saves a lot of the back-and-forth guesswork, especially when you're trying to find those hidden categories that don't appear in the KDP dashboard.

Common Mistakes When Changing KDP Categories

Picking overly broad categories. "Fiction" or "Nonfiction" as a top-level category is almost useless. You'll never rank there. Go as specific as possible.

Choosing categories just because they're easy to rank in. If the category has nothing to do with your book, readers who find you there will bounce. That hurts your conversion rate, and Amazon notices.

Forgetting to update after a relaunch or rebrand. If you've changed your cover, subtitle, or content angle, your old categories might not fit anymore. Always revisit categories when you make significant changes to your book's positioning.

Only using the KDP dashboard. If you're not contacting support for additional categories, you're leaving visibility on the table. Three categories versus ten is a massive difference in discoverability.

How Often Should You Change Your Categories?

There's no penalty for changing categories. Amazon doesn't flag or suppress books for updating this information. In my experience, it makes sense to review your categories at least every few months, or whenever you notice a dip in sales rank that isn't explained by other factors.

Some authors test new categories every 30 days during a book's first six months. That's not a bad approach. The data you get from ranking in different categories tells you a lot about where your readers actually browse.

Just keep a spreadsheet. Track which categories you've tried, what your rank was in each, and how long you stayed there. Over time, you'll build a clear picture of where your book performs best.