Only your title has to appear on the cover. The Subtitle does not have to be.&nbsp;
You can add it though if you would like.
For more details on Titles and Subtitles on KDP Help you can read this article they have there, Books <a rel="noopener" href="https://kdp.amazon.com/en_US/help/topic/GW7J4WEKBVU25YEC">Titles &amp; Editions</a>.

Only your title has to appear on the cover. The Subtitle does not have to be. 

You can add it though if you would like.

For more details on Titles and Subtitles on KDP Help you can read this article they have there, Books .

[KDP PUBLISHING] Does Your Subtitle Have to Appear on the Cover?

I Am New & I Need Help Learning, What is the Best Way?

What Project Type Should I Pick For My Book - NOT Interior Only and Cover Only - KDP Rejection, Size is Not as Expected

What Do I Do Now That I Have Published My Book(s) / Why Don't I Have Any Sales?

Pricing of Books When Books are Newer

Amazon Advertising Tips & Tweaks

BOOK BOLT RESEARCH HELP

BOOK BOLT MARKETING HELP

[AMAZON ADS] How Can I See all of my Bills From my Amazon Ads?

[AMAZON ADS] How Do I Find Keywords People Used in Searches to See my Ad?

[AMAZON ADS] How Do I Run Ads on the Books I  Published?

[AMAZON ADS] How Do I See How My Campaigns Are Doing?

[AMAZON ADS] Is There A Way to Figure Out Organic Sales and Your Ad Sales

[AMAZON ADS] Turn Off Ads and Is There a Way to Not See My Active Ads Anymore?

[AMAZON ADS] When Do They Take Payment for my Ads?

[AMAZON MARKETING] Can We Have a Website With Our Books, Linking to our Page on Amazon? Or Other Social Media?

[AMAZON MARKETING] How Can I Add A Plus for My Book?

[AMAZON MARKETING] How Can I Gain More Reviews With QR Codes?

[AMAZON MARKETING] How Can I Make A Picture of My Cover or Interior Pages For A Plus?

[AMAZON MARKETING] How Do You Get Around Having no Reviews on Books and Create Confidence to Seller?

[AMAZON MARKETING] How Long Does it Take for my A Plus Content to Appear?

[AMAZON MARKETING] Is There a Way to Get A Short Link to My Book Rather Than One With 200 Characters? 

[AMAZON MARKETING] Is There a Way to Use Email Marketing for Customers That Get Your Books?

[AMAZON QUESTION] Amazon Put My Book on Sale, Will I Still Make the Same Royalty as I Did Before?

[AMAZON QUESTION] Can I Order a Book I Created on Amazon at a Reduced Price?

[AMAZON QUESTION] How Can I Get My Back Cover To Appear On Amazon?

[AMAZON QUESTION] Is There a Way to Not Show the Look Inside Feature or Pick the Pages People See?

[AMAZON QUESTION] My Book Just Got Approved, But it Won't Show Up When I Search For It, Why Not?

[AMAZON QUESTION] My Book Just Went Live, Why Can't I Find it on Amazon? (I Want to Give a Link to Friends)

[AMAZON QUESTION] The Look Inside / Read Sample / Back Cover Isn't Showing, Why Not??

[AUTHOR CENTRAL] How Can I Get An Authors Page?

[AUTHOR CENTRAL] How Do I Add More Author Pages?

[AUTHOR CENTRAL] How Do You Add Books to Your Author Page?

[AUTHOR CENTRAL] How Do You Create A Custom URL For Your Author Page?

[BOOK BOLT QUESTION] Can I Post My Book or Other Links to Promote in the Facebook Group?

[BOOK BOLT QUESTION] Can I Suspend or Pause My Subscription & Come Back Later & All My Projects Will Be There Still?

[BOOK BOLT QUESTION] Can you Add Titles / Chapters to Your Live Call YouTube Videos? 

[BOOK BOLT QUESTION] Can We Also Create & Upload Stuff to Esty or Other Sites?

[BOOK BOLT QUESTION] Can You Upload Your Books to Other Self Publishing Websites Besides Amazon KDP?

[BOOK BOLT QUESTION] Difference Between the Estimated Moving Average Sales and the Estimated Monthly Sales

[BOOK BOLT QUESTION] Does Book Bolt Offer an Affiliate Program?

[BOOK BOLT QUESTION] How Can I See What my Book Bolt Membership / Subscription is?

[BOOK BOLT QUESTION] How Do I Get Invoices From Book Bolt?

[BOOK BOLT QUESTION] How Do You Tell the Difference of a KDP Book And Non KDP Book?

[BOOK BOLT QUESTION] Is There a Book to Buy That Will Help Show Me How to do Everything in Book Bolt?

[BOOK BOLT QUESTION] Is There a Video About the Puzzles I Can Watch Before Upgrading to Pro?

[BOOK BOLT QUESTION] KDP Spy Won't Work Properly

[BOOK BOLT QUESTION] What is the Difference Between Newbie, Pro and Premium Memberships

[BOOK BOLT QUESTION] What Training Videos Are Best to Watch?

[BOOK BOLT QUESTION] Where Did Puzzle Wiz Go? Where Are All the Puzzles

[KDP BOOKSHELF] Can I Remove Books From Amazon Once They are Live?

[KDP BOOKSHELF] Can You Remove Books or Archive From Your Bookshelf?

[KDP BOOKSHELF] How Will I Know When My Book on Amazon Gets Published?

[KDP PUBLISHING] Can I Change my Categories on Amazon KDP After my Books are Published?

[KDP PUBLISHING] Can I Use HTML in the Description Field Still?

[KDP PUBLISHING] Can You Edit a Cover or your Interior that is on Amazon KDP?

[KDP PUBLISHING] Can You Edit the Title of Your Book, Author Name or Other Information on KDP Once it Has Been Approved?

[KDP PUBLISHING] Can You Make a Spiral / Coil Bound Books on Book Bolt to Sell on Amazon KDP?

[KDP PUBLISHING] Can You Use Book Bolt to Create an Actual Book, Like a Novel?

[KDP PUBLISHING] Can You Use Quotes in a Book you Create?

[KDP PUBLISHING] Do I Check the Box Low Content Book for my Coloring Book or Puzzle Books?

[KDP PUBLISHING] Do the Keyword Boxes Have the Same Weight or are Boxes 6 & 7 Less Important?

[KDP PUBLISHING] Does KDP Frown Upon Using the Same Interior with Different Covers?

[KDP PUBLISHING] How Can I Learn to Find a Niche or Drill Down Even Deeper to Sub-Niches?

[KDP PUBLISHING] How Can I Upload My PDF Book As An eBook?

[KDP PUBLISHING] How Do I Edit the Description, Categories, Keywords or Price?

[KDP PUBLISHING] How Do You Create a Series on KDP

[KDP PUBLISHING] How Do You Proof Your Interior Before Uploading to KDP?

[KDP PUBLISHING] How Do You Reverse Search an Image?

[KDP PUBLISHING] How To Upload Low & Medium Content Books To Amazon KDP?

[KDP PUBLISHING] If I Need to Edit a Book That Has Been Published, Do I Need to Unpublish it First?

[KDP PUBLISHING] If I Only Have a Few Pages In Color in my Book, Will They Only Charge Me The Color Price for Those Pages?

[KDP PUBLISHING] If I Make One of my Books in a Different Language Can I Use the Same Cover as the English Version One?

[KDP PUBLISHING] Is it Worthwhile to Add Our Books To Expanded Distribution?

[KDP PUBLISHING] Is There A Way To Figure Out My Royalty on a Book Before Publishing?

[KDP PUBLISHING] My Book is Still in Review After 72 Hours, is This Normal?

[KDP PUBLISHING] My Book Was In Review Status For Days, Then Back to Draft, Should I Submit Again?

[KDP PUBLISHING] Should / Can you Create All of your Books Under One Name?

[KDP PUBLISHING] Should I Open Another KDP Account To Publish With A Different Author / Pen Name?

[KDP PUBLISHING] Should I Put the Copyright Symbol In My Book?

[KDP PUBLISHING] What Are the 7 Keyword Boxes Strategy?

[KDP PUBLISHING] What Is the Minimum & Maximum Number of Pages You Can Use in a Book and the Royalty Amount?

[KDP PUBLISHING] What Size Font is a Large Print Book?

[KDP PUBLISHING] Why Does KDP Says I Have the Wrong File Format When Uploading My Book (How to Unzip Files)?

[KDP PUBLISHING] Why Does Neil Always Click Page 3 When Doing Niche Research?

[KDP PUBLISHING] Would the Puzzles or Templates in the Studio Be Considered AI Generated?

[KDP REJECTION] During Our Review, We Found Contributors Listed For the following Book May Confuse Our Customers

[KDP REJECTION] Reason’s Why Your KDP Account Could be Suspended or Banned

[KDP REJECTION] Why Did KDP Reject My Book & Said That My Book is Not Low Content

[KDP REJECTION] Why Did KDP Reject my Cover? Cover Do's and Don'ts

[KDP REJECTION] Why Did KDP Reject my Interior? Interior Do's and Don'ts

[KDP REJECTION] Why Did KDP Reject my Book For Not Having Enough Pages with Text on the Spine?

[KDP REJECTION] Why Did KDP Reject my Book for to Many !!!!!!

[KDP REJECTION] Why Did KDP Reject my Sketch Book for Too Many Blank Pages?

[KDP ROYALTIES] Can I Download Monthly Royalties Reports From KDP? (For Tax Purposes as Well)

[KDP ROYALTIES] Does KDP Send Out Emails of Upcoming Payments?

[KDP ROYALTIES] How Do I See How Much I Made Selling Books?

[KDP ROYALTIES] If I Sell Books This Month When Will I Get Paid for it?

[KDP ROYALTIES]  Is There a Way to See the Costs, Price & Royalties On A Book Before Creating It?

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