Quick Summary
KDP gives you three categories and seven keyword fields for each format. Ebook, paperback, and hardcover are separate listings, so each has its own slots. You choose categories directly from Amazon’s store categories in the dashboard. The 2023 change removed the email route for extra categories, so three is the firm limit. Keywords work best as seven phrases, not seven single words, and widely cited guides put each field at 50 characters including spaces. Do not repeat words from your title or subtitle, since Amazon already indexes them. Pick specific categories where your book can rank visibly, review your keywords at 30 days, and change only a few at a time.
Introduction
For Amazon KDP keywords 2026, the rules are simple but firm. You get up to three categories and seven keyword fields for each format of your book. The old workaround of emailing KDP support for up to ten categories no longer exists. That change arrived in 2023, so much of what feels new in 2026 is really the end of old tactics. Choose accurate, specific categories, fill each keyword field with a phrase readers actually type, and do not repeat words already in your title.
If you read advice claiming Amazon rewrote the rules in 2026, check the date. The big structural change came in 2023, and 2026 guides confirm the three category and seven keyword limits still stand. This guide is for authors setting up a new listing or fixing an old one. Use it before you publish, and again at 30 days, when you have real data on how readers find your book.
What Changed and What Stayed the Same
Short answer: The major change was the end of the support email route for extra categories in 2023. The core limit of seven keywords stayed the same.
| Topic | Before 2023 | In 2026 |
| Categories at setup | Two, then request up to ten by emailing KDP support | Up to three per format, chosen directly in the dashboard |
| Category source | An industry code list | Amazon’s own store categories |
| Extra categories | Available on request | No support route, three is firm |
| Keyword fields | Seven | Seven per format |
| Extra browse placement | Mostly through support requests | Amazon may add categories from your metadata, but KDP does not publish a reliable map |
Sources differ on small details, so treat any guide that promises a secret “unlock” list with caution. One 2026 guide notes that KDP says categories and keywords work together to help Amazon shelve a book, but it does not publish a stable keyword to category map.
How Many Keywords and Categories Do You Get in 2026
Short answer: You get up to three categories and seven keyword fields for each format, and each format is a separate listing with its own slots.
Category availability can differ by format and marketplace, so check each version of your book. KDP’s own help page tells authors to choose up to seven keywords that relate to the book’s content, and to avoid vague ones. Its example says a book about national parks gains visibility from specific names like “Yellowstone” and “Grand Teton,” but not from the word “Parks.” That page is older, but the advice matches current 2026 guides.
How to Choose Your Three KDP Categories
Short answer: Choose the three most accurate categories where your readers would actually shop, and favor specific subcategories where your book can rank visibly.
Follow these steps.
- Start with accuracy. Amazon advises choosing categories where the right readers would reasonably shop, so never pick a shelf just because it is popular.
- Study the top books in your niche and note which categories they use.
- Prefer narrow subcategories over giant ones. One guide says visible ranking in a small category can earn a bestseller badge, while sitting invisibly in a huge category earns nothing. Treat that as a visibility benefit, not a guaranteed sales boost.
- Weight your picks toward winnable niches, while keeping every choice genuinely relevant.
- Repeat the process for each format and marketplace you publish in.
For example, a cozy mystery author usually gains more from the narrow cozy shelf than from the huge general mystery shelf, since the narrow shelf is easier to rank in.
How to Choose Seven KDP Keywords
Short answer: Fill all seven fields with short phrases real readers type, written in natural word order, and use them for terms that appear nowhere else in your metadata.
Follow these steps.
- Think like a reader. Ask what a reader would type to find a book like yours.
- Use Amazon’s own search suggestions. Type a candidate phrase into the Amazon search bar and see what completes it.
- Write phrases, not single words. Guides report a limit of 50 characters including spaces per field, and the dashboard shows the live limit as you type.
- Use natural word order. Amazon’s guidance says customers search “military science fiction,” not “fiction science military.”
- Do not repeat words from your title, subtitle, or categories. Amazon already indexes them, so a repeated word wastes a field.
- Use the seven fields for setting, character types, themes, tone, and audience.
- Test your phrase by searching it on Amazon. If similar books to yours appear, the phrase fits.
| Field | Wasteful | Effective example |
| 1 | romance | small town second chance romance |
| 2 | book | enemies to lovers workplace romance |
| 3 | best | clean romance with fake dating |
These examples are illustrations. Build your own list from real search suggestions in your niche.
Want a keyword and category plan built for your genre? See our book marketing services.
How Keywords and Categories Work Together
Short answer: Keywords tell Amazon which reader searches your book should answer, and categories place it on browse shelves and ranking lists.
Amazon checks your title, subtitle, categories, and keyword fields when it decides whether your book matches a search. Some guides say Amazon may place a book in extra browse categories based on your backend keywords. That is possible, but KDP does not publish a reliable keyword to category map. Choose your categories yourself in the dashboard, and use keywords to add specificity beyond those labels.
Where to Set Them in the Dashboard
Open the title on your Bookshelf and choose Edit book details. Scroll to the Categories section and click Choose categories. The keyword boxes sit in the same book details page. Save and republish your changes, and repeat for each format.
How to Review and Update Your Keywords
Short answer: Treat keywords as something you test, not something you set once, and change only a few at a time so you can see what moved.
One guide reports that changes typically take effect within about 72 hours. Another recommends reviewing keywords at 30 days, then quarterly. Replace weak fields first, track what happens, and avoid rewriting all seven at once. Each change gives you a small test, which is how you learn what readers actually search.
Do BISAC Codes Matter
Short answer: For a KDP only ebook, you usually do not need to worry about BISAC codes, but they matter if you go wide or print through other distributors.
BISAC is the industry subject code system. Guides say Amazon assigns it for a KDP only ebook. If you distribute widely or print through IngramSpark, choose the most specific code that fits, not a general one, which also matches the advice from the Book Industry Study Group.
Common KDP Keyword and Category Mistakes
The most common mistake is treating the seven fields as seven single words. A second is repeating title words, which wastes space. A third is choosing only giant, crowded categories where the book can never rank visibly. A fourth is relying on old advice about emailing KDP support for ten categories, since that route is gone. A fifth is setting everything once and never reviewing it. A sixth is choosing misleading categories or keywords, which attracts the wrong readers and invites problems. Our guide to ebook formatting mistakes also covers common metadata errors that lead to rejection.
Conclusion
Amazon KDP keywords 2026 come down to discipline, not secrets. You get three categories and seven keyword fields for each format. Choose accurate, specific categories where your book can rank visibly. Fill the seven fields with phrases real readers type, and keep them free of words already in your title. Review at 30 days, change a few fields at a time, and ignore any guide that promises a hidden unlock list. Since most Amazon authors depend on this one platform, small improvements here compound over time.
Frequently Asked Questions
How many keywords can I use on KDP in 2026?
You get seven keyword fields for each format. Widely cited guides put each field at 50 characters including spaces, and the dashboard shows the live limit.
How many categories can I choose on KDP in 2026?
You can choose up to three categories per format. Ebook, paperback, and hardcover each have their own three slots.
Can I still get ten categories by emailing KDP support?
No. Guides report that Amazon retired that route in 2023, so three per format is the current limit.
Should I repeat my title words in my keywords?
No. Amazon already indexes your title, subtitle, and categories, so repeating those words wastes a field. Use the fields for phrases that appear nowhere else in your metadata.
How often should I change my keywords?
Review them at 30 days, then about once a quarter. Change a few fields at a time, since changes typically take effect within about 72 hours and you want to see what moved.
Do keywords add my book to extra categories?
Amazon may place a book in additional browse categories based on its metadata, but KDP does not publish a reliable map. Choose your categories yourself and use keywords for specific reader searches.
A Note From Authors Publishing House
Strong keywords and categories take research, testing, and regular review. Our marketing team researches reader search phrases, maps your book to the right categories, and reviews performance after launch. Visit authorspublishinghouse or reach out for a free consultation to talk through your listing.
