Ad break-even calculator
Before you spend on Amazon, Facebook or BookBub ads: how much can a click, or a sale, cost before the ad loses money? With a series, a reader who buys book 1 is worth more than book 1's royalty, because some of them go on to buy the rest. Enter your numbers and see where the line is.
Your books, in series order
Royalty is what you earn a sale (the KDP royalty calculator works it out). Read-through is the share of readers of the book before who buy this one: the KDP report reader works it out from your sales.
| If your ads make | Break-even cost a click (book 1 only) | Break-even cost a click (with the series) |
|---|
Break-even means the ad pays for itself and no more: bid under it to make money. ACoS here is worked out against book 1's list price, so it's the figure to stay under if your ad reports count only book 1's sales. Kindle Unlimited reads count as full reads of each book (its KENP page count × the rate you enter). KDP announces the Kindle Unlimited fund each month, and the rate a page comes from that fund and how many pages were read, so it moves: work yours out from a recent month (your KENP royalty ÷ your pages read).
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