KDP Series & Box Set Royalty Calculator
Compare your royalty from selling books individually versus combining them into one box set, using the same royalty math KDP actually uses.
Box set page count is estimated as the sum of the individual books, which is usually close but can run slightly higher once everything is combined into one file. This calculator uses amazon.com rates: 60% royalty at or above $9.99, 50% below that, minus printing cost for the page count.
Common questions
Does a box set earn more than selling separately?
Not automatically. The combined page count means a real printing cost that has to be covered by a single royalty rate, not several. It comes down to whether your bundle price clears that combined cost with room to spare.
How should I price a box set?
High enough that the royalty rate covers the combined printing cost of every book's pages added together, not just a discount off the sum of individual prices.
What page count should I use?
Roughly the sum of the individual books. The real number can run a little higher once front matter and formatting are combined, so treat this as a close estimate.
Why this matters
A box set feels like it should be a straightforward win, more content, one purchase, but the printing cost scales with total pages in a way that a simple "add up the list prices and discount a little" approach doesn't account for. Worth running the real numbers before committing to a bundle price.
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