KDP Free Book Promotions: How to Use Your Five Free Days
Use KDP Select Free Book Promotions strategically: understand the five-day allowance, trade-offs, promotion stacking, realistic outcomes, and what to measure afterward.
KDP Select lets an enrolled Kindle ebook run a Free Book Promotion for up to five days during each 90-day enrollment period. The days can create a large increase in downloads, but a download count by itself does not prove that the promotion created long-term value.
Plan the free window around the business outcome you want and measure what happens after the price returns to normal. If retaining paid royalties matters more than maximizing free reach, compare the Kindle Countdown Deal instead.
How Free Days Work
Free Book Promotions are available to Kindle ebooks enrolled in KDP Select and can run for up to five days in each 90-day enrollment period. KDP lets you schedule the dates through the Marketing area after the ebook is live and enrolled.
Free downloads do not generate a direct ebook royalty. They are recorded separately in KDP reporting, so treat the promotion as a reader-acquisition cost measured in foregone sale revenue and attention.
The Strategic Case for Free Days
A free promotion makes the most sense when the book has value beyond the free download itself. Common cases include a first-in-series title, a relaunch where you need new readers, a book tied to an email or author-platform strategy, or a title where broad sampling can create paid continuation into other books.
Do not promise a review spike or an organic-ranking boost. Free downloads can expand readership, but reviews remain voluntary and Amazon treats free-promotion transactions separately in reporting. Define success using the outcomes that matter to your catalog.
Promotion Stacking: Making Free Days Count
A free day with no promotion beyond listing the book for free generates very few downloads. The free price alone does not make your book discoverable – Amazon’s free list has hundreds of thousands of titles and your book is not automatically surfaced to browsing readers just because it’s free. Meaningful free day results require active promotion to readers who are already looking for free books. The most effective promotion channel for free days is genre-specific book promotion newsletters – services that email their subscriber lists daily with curated free and discounted book recommendations. Sites like Freebooksy, Robin Reads, Ereader News Today (ENT), and Book Barbarian each reach genre-segmented audiences of readers actively looking for free ebook picks. Submitting your free promotion dates to these services (typically 2–4 weeks in advance) means your book is featured to thousands of genre-matched readers on the same day it’s free, dramatically increasing download volume versus an unannounced free day. Stack multiple promotion submissions across your free days where possible: submit to two or three newsletter services for the same promotional period, coordinate a social media post and email list announcement to go out the morning your free promotion begins, and if you have a BookBub author profile, post about the free promotion there as well. The cumulative effect of multiple promotional channels firing simultaneously – all driving readers to the same free book on the same day – generates peak download volumes that produce the strongest review seeding and BSR spike effects.
Setting Realistic Expectations
Set a baseline before the promotion: normal paid units, KENP, email activity, ad performance, and series sales where relevant. During and after the free window, record free downloads and then look for changes in paid units, KU reading, later-series activity, and audience growth.
A successful promotion may produce a smaller download total but a stronger downstream result if the audience is better matched. Avoid comparing your book with screenshots from unrelated genres or authors with very different platforms.
Free Days vs Countdown Deals: Choosing the Right Tool
Free Book Promotions maximize price reduction and remove purchase friction, but they produce no direct ebook sale royalty. Countdown Deals keep the transaction paid, show a timed discount, and can retain a selected 70% royalty rate below the normal price floor.
KDP currently lets you use only one of those promotion types in a 90-day Select term. Choose free when acquisition and sampling are the priority; choose Countdown when paid conversion, royalty retention, and price anchoring matter more.
Coordinating Free Days with External Promotion Services
To get the most from a free day, you need to be listed in front of readers who are actively looking for free ebooks in your genre – and that means submitting to book promotion services well in advance. Most genre-specific free book promotion newsletters have submission deadlines of 2–4 weeks before the promotion date. Plan your free days at least a month ahead so you have time to submit to multiple services before their deadlines close. The most widely used free book promotion services as of 2026 include Freebooksy (large genre-segmented audience, strong for most fiction and nonfiction categories), Robin Reads (good conversion rates for literary fiction and narrative nonfiction), Ereader News Today (ENT – large audience, accepts free titles with fewer reviews than some other services), and Buck Books (good for lower-review-count free titles). Each service has its own submission requirements, including minimum review counts and average star ratings. Check current requirements before submitting – services periodically update their eligibility criteria. Plan your free day submissions to spread across multiple services on overlapping dates for your promotional window. If your free period is three days, submit to one service for day one, another for day two, and a third for day three – or submit multiple services for the same day if they allow it. The goal is sustained promotional coverage across the full free window rather than a single-day spike. Authors who stack three or more newsletter features across a 3-day free window consistently outperform those who use a single service for a single day, even when the individual services have similar reach.
After the Free Days: Following Through
When the promotion ends, verify the paid price is live and watch the next several days and weeks rather than declaring success from the download spike. Measure paid sales, KENP, later-series sales, email signups, and any attributable campaign traffic.
If new readers leave reviews, welcome the feedback but do not make reviews a condition of receiving a free copy or future benefit. Amazon allows free and discounted book copies as long as the author does not require or influence the review.
Frequently Asked Questions
How many free days do I get?
Up to five days during each 90-day KDP Select enrollment period.
Do free downloads earn royalties?
No. A Free Book Promotion produces free downloads rather than direct ebook royalties.
Can I run free days and a Countdown Deal in the same term?
No. KDP currently allows one promotion type in a Select enrollment period.
Will free days automatically improve my BSR?
Do not plan around that assumption. Measure the downstream paid sales, KENP, series activity, and audience outcomes instead.
Can I ask free readers for reviews?
You can invite an honest optional review, but the free copy cannot be conditioned on a review and you cannot influence the content or rating.
What to Do Next
Give the free period one clear job, promote it to a relevant audience, and measure the downstream behavior after the book returns to paid. The promotion is useful when it creates value beyond the free-download counter.
Rank Fuel’s free Countdown Deal Planner helps organize KDP Select promotional timing so you can compare the available window before committing it.
