When you weigh up KDP Free Days vs Kindle Countdown Deals, the first thing to understand is that they are mutually exclusive. Both promotions live inside KDP Select — the 90-day exclusivity program — and you can only run one type per enrollment term. Choose wrong for your goal and you leave either money or momentum on the table. Here is how each option works, where the rules catch authors off guard, and a clear framework for deciding which one to use.
KDP Select: The Foundation Both Promotions Require
Neither promotion is available outside KDP Select. Enrolling means committing your Kindle eBook exclusively to Amazon for a rolling 90-day period — you cannot sell the ebook on other retailers while enrolled. In return, Amazon gives you access to two promotional tools: the Free Book Promotion and the Kindle Countdown Deal. You get one shot at each per term, but you must pick one — not both.
Before you can run a Countdown Deal specifically, your book must have been enrolled in KDP Select for at least 30 days. New enrollments need to wait out that window before scheduling one. Free Days have no such waiting period built in, which gives them a slight edge for brand-new enrollments when you want to move fast.
Understanding these constraints upfront is important because your choice locks you in for the entire 90-day cycle. If you run Free Days in January, you cannot pivot to a Countdown Deal in February during that same term. Plan your promotional calendar before you enroll — or re-enroll. The KDP how-to guides on Pubscout can help you map out a realistic launch schedule around these windows.
KDP Free Days: Maximum Visibility, Zero Royalties
A Free Book Promotion lets you list your Kindle eBook at $0.00 for up to 5 days per 90-day enrollment period. You do not have to use all 5 days at once — you can split them across the term if you want. But understand the trade-off clearly: you earn no royalties during free days. Every download costs you nothing in effort and earns you nothing in revenue.
So why would anyone do it? Volume. A free book can accumulate downloads at a pace a paid book rarely matches. That download spike can push your book's Amazon Best Seller Rank dramatically, creating short-term visibility that sometimes carries over after the promotion ends. For authors running a series, making the first book free is a proven way to drive paid sales of sequels. For debut authors with no reviews, free days can seed the review count that makes later paid sales convert better.
To schedule a Free Book Promotion: log into KDP, click the menu next to Kindle eBook Actions, select KDP Select Info, choose Free Book Promotion, pick your dates, and save. That is the entire process. Amazon does not currently allow permanently free pricing through KDP, so these 5 days are your only route to the $0.00 price point.
Note that Free Days are available globally — unlike Countdown Deals, they are not restricted to specific marketplaces. If your audience spans multiple regions, that broader reach matters.
Kindle Countdown Deals: Discounted Price, Full Royalties
A Kindle Countdown Deal lets you discount your book for up to 7 days per 90-day term, with a countdown timer displayed directly on the Amazon product page. The timer creates urgency — readers can see the deal expiring in real time, and Amazon also features the book on a dedicated deals page organised by price point, giving it additional discoverability beyond your own marketing.
The standout feature is the royalty structure. Normally, books priced below $2.99 earn only 35% royalties. During a Countdown Deal, you keep the 70% royalty rate even when the promotional price drops below that threshold. If you are selling a $4.99 book at $0.99 for a weekend, you still earn 70% of that $0.99 rather than the usual 35%. That changes the economics of discounting considerably — use the KDP Royalty Calculator to model the actual revenue at different price points before you commit.
Countdown Deals are only available on Amazon.com and Amazon.co.uk — no other marketplaces. For Amazon.com, your list price must sit between $2.99 and $24.99. For Amazon.co.uk, the range is £1.99 to £15.99. The minimum price reduction is $1.00 USD or £1.00 GBP, and you can set up to 5 price tiers within a single deal — for example, starting at $0.99, stepping up to $1.99 midway through, then returning to full price.
The scheduling rules are strict. You must schedule the deal at least 24 hours before it starts. Your book's list price must be unchanged for 30 days before the deal and must remain unchanged for 14 days after it ends. The deal itself must conclude no later than 14 days before your KDP Select term expires. You are limited to one Countdown Deal per 90-day term. Miss any of these requirements and the deal simply will not be eligible to schedule.
To set one up: log into KDP, click the menu next to Kindle eBook Actions, select KDP Select Info, choose Countdown Deal, set your dates and prices, and save.
Head-to-Head Comparison
- Royalties: Free Days earn $0. Countdown Deals earn 70% (on the 70% plan) even below $2.99.
- Duration: Free Days — up to 5 days per term. Countdown Deals — up to 7 days per term.
- Marketplace reach: Free Days — all Amazon marketplaces. Countdown Deals — US and UK only.
- Visibility features: Free Days rely on free-book promotion sites and organic browse. Countdown Deals include a countdown timer on the product page and placement on Amazon's deals browse pages.
- Price-stability requirement: Free Days have none. Countdown Deals require 30 days stable before and 14 days stable after.
- Advance scheduling: Free Days can be set up with minimal lead time. Countdown Deals must be scheduled at least 24 hours ahead.
- Best use case: Free Days for volume, reviews, and series funnels. Countdown Deals for revenue-generating discounts with Amazon-native urgency signals.
Which Strategy Actually Wins?
The honest answer is: it depends on what you are optimising for in that 90-day term. There is no universally superior option — only the right choice for your specific goal at that moment in your book's lifecycle.
Use Free Days when:
- You are launching a series and want to build readthrough momentum by giving away book one.
- Your book has few or no reviews and you need social proof before running paid promotions.
- Your audience is spread across multiple Amazon marketplaces and you want global reach.
- You have a strong back-catalogue that a free front-list book can feed into.
Use Countdown Deals when:
- Your book already has reviews and a track record, and you want to discount it without sacrificing royalty rate.
- You want Amazon's own countdown timer and deals placement to do conversion work for you.
- You are targeting US or UK readers specifically and want to maintain revenue while increasing sales velocity.
- Your list price is stable and you can comfortably lock it for 30 days before and 14 days after the deal.
A practical framework: if you are in the first term for a new book with no reviews, lean toward Free Days. If you are in a subsequent term with an established book and an existing reader base, a Countdown Deal often generates better returns because you are converting readers who were already considering a purchase — not just harvesting free downloads from bargain hunters. Check the BSR trajectory of comparable books in your category using the BSR Sales Calculator to understand what sales velocity looks like at different price points before deciding.
It is also worth thinking about which tool complements your external promotion budget. Free Days pair well with free-book promotion newsletters. Countdown Deals pair well with paid newsletter ads where you are paying per click — because you are actually earning royalties on each conversion rather than giving the book away.
If you are still scoping your niche and want to understand the competitive landscape before committing to either approach, the KDP niche pages on Pubscout break down category-level data that can sharpen your strategy.
Using Real-Time Data to Time Your Promotions
Whichever tool you choose, timing matters. Running a promotion when your category is flooded with competing new releases reduces your chances of ranking. The Pubscout Chrome Extension shows you live BSR, estimated monthly sales, and niche data directly on any Amazon book page — useful for gauging how active a category is before you schedule a promotion window.
The Bottom Line
Free Days and Countdown Deals solve different problems. Free Days maximise download volume at zero revenue. Countdown Deals maximise discounted revenue with Amazon-native urgency features. Neither is objectively better — they are different instruments for different points in a book's commercial life. Understand your goal for each 90-day term, plan your price-stability window if you are going with a Countdown Deal, and do not let the choice default to habit. Each enrollment period is a fresh decision worth making deliberately.