KDP Royalty Calculator

Amazon KDP Royalties: The Complete Guide for Self-Publishers

Amazon KDP (Kindle Direct Publishing) is the dominant platform for self-published books, handling an estimated 80% of eBook sales and a growing share of print-on-demand. Understanding how KDP calculates royalties is essential for pricing your book correctly and maximizing your earnings.

This guide covers eBook and paperback royalty calculations, the 35% vs 70% decision, pricing strategy, and how to project your earnings at different sales volumes.

eBook royalty calculations

KDP offers two royalty rates for eBooks: 35% and 70%. The rate you choose (or are required to use) depends on your list price and the marketplace.

The 35% royalty rate is simple: your royalty equals list price x 0.35. There are no delivery costs deducted. This rate is available at any price point from $0.99 to $200.00. It is your only option for eBooks priced below $2.99 or above $9.99.

The 70% royalty rate is more complex: your royalty equals (list price - delivery cost) x 0.70. The delivery cost is based on your eBook's file size at approximately $0.15 per megabyte. A text-only non-fiction eBook is typically 1-3 MB. A book with many images can be 10+ MB, significantly eating into your royalty. This rate is available only for eBooks priced between $2.99 and $9.99.

For most non-fiction eBooks (2-3 MB file size), the 70% rate yields significantly more money at every price point where it is available. At $4.99 with a 2 MB delivery cost ($0.30), your 70% royalty is $3.28, while the 35% royalty would be $1.75. The 70% rate nearly doubles your per-sale earnings.

Paperback royalty calculations

Paperback royalties on KDP work differently. The royalty rate is fixed at 60%, and printing costs are deducted before the royalty is calculated. Your royalty equals (list price - printing cost) x 0.60.

Printing costs are determined by page count and ink type. For black-and-white interiors in the US marketplace, the formula is: $0.85 + ($0.012 x page count). A 200-page book costs $3.25 to print. A 300-page book costs $4.45. Color interiors are significantly more expensive at approximately $0.85 + ($0.065 x page count).

Pricing paperbacks requires balancing royalty earnings against market expectations. Non-fiction paperbacks typically price at $12.99-$19.99. Pricing below the market looks cheap and signals low quality. Pricing above the market reduces sales volume. Use our calculator above to find the sweet spot where your royalty per sale and expected sales volume maximize total earnings.

Hardcover royalty calculations

KDP now offers hardcover printing through their case laminate format. The royalty rate is the same as paperback (60%), but printing costs are higher. The fixed cost is approximately $5.14 plus $0.012 per page for black-and-white interiors. Hardcovers typically price at $24.99-$34.99, generating royalties of $9-$16 per sale depending on page count.

Pricing strategy: the $4.99-$7.99 sweet spot

Data from thousands of self-published non-fiction titles shows that the $4.99-$7.99 price range optimizes total revenue (royalty per sale x number of sales) for most authors. Here is why:

At $4.99, you earn approximately $3.28 per sale at 70% and benefit from high conversion rates. Readers perceive $4.99 as a fair price for non-fiction eBooks, and impulse purchases are common. This is the best entry price for debut authors building an audience.

At $7.99, you earn approximately $5.38 per sale at 70%. Sales volume drops slightly compared to $4.99 but the higher per-sale royalty more than compensates. This price works best for authors with an established platform, business books aimed at professionals, and books with strong social proof (reviews, endorsements, media mentions).

At $9.99, you earn approximately $6.78 per sale — the maximum possible at the 70% rate. However, $9.99 is a psychological threshold for many eBook buyers. Sales volume typically drops 20-30% compared to $7.99. This price is best for highly specialized non-fiction where buyers are less price-sensitive (technical manuals, professional reference, specialized business guides).

The $0.99 promotional strategy

Many authors temporarily price at $0.99 to boost rankings and visibility. At 35% royalty, you earn $0.35 per sale — but the goal is not per-sale profit. A $0.99 promotion generates a spike in sales velocity, which pushes your book higher in Amazon's category rankings. Higher rankings mean more organic visibility, which drives sales at your regular price point after the promotion ends.

The typical strategy: launch at $4.99-$7.99, run a $0.99 promotion for 3-5 days after accumulating 10-20 reviews, then return to your regular price with improved rankings. This works best when combined with a BookBub deal or newsletter promotion.

Projecting your earnings

Realistic sales projections help you evaluate whether self-publishing is the right investment. Here are benchmark figures based on industry data:

First 90 days: A well-executed launch with an existing audience of 1,000+ email subscribers or social followers can generate 100-500 sales. Without an audience, expect 20-50 sales unless you invest heavily in Amazon Ads.

Monthly steady state: After the launch period, most non-fiction books sell 10-50 copies per month through organic Amazon traffic. Active marketing (ads, content marketing, speaking) can sustain 50-200+ monthly sales.

Annual projection: A non-fiction book at $6.99 selling 50 copies per month generates approximately $2,800 per year in eBook royalties alone. Add paperback sales (typically 20-30% of eBook volume at higher per-sale royalties) and total annual revenue approaches $4,000-$5,000. Over 3-5 years, a single book can generate $15,000-$25,000 with minimal ongoing effort.

The real ROI of a book often comes from indirect revenue: speaking opportunities ($5,000-$50,000 per engagement), consulting leads ($10,000-$100,000+ per client), and authority positioning that opens doors across your career. Calculate your total publishing costs and compare them against these indirect revenue streams.