Amazon Kindle Direct Publishing pays authors through a royalty system that looks simple on the surface and turns out to have real subtleties underneath. Understanding exactly how you get paid — the difference between the two ebook royalty tiers, how print margins work, and how Kindle Unlimited pays per page read — helps you price your book to actually earn rather than leaving money on the table.
This guide explains the 35% and 70% ebook options and the catch that comes with the higher one, how paperback royalties are calculated, what KENP is and how it pays, and how to estimate your earnings before you publish.
For ebooks, KDP offers a choice between two royalty rates:
The 70% tier is the obvious choice for most books, but the delivery fee means a large, image-heavy ebook can earn less than a simple calculation suggests. The KDP Royalty Calculator shows your actual take-home at each price so you can compare properly.
The delivery fee on the 70% tier is charged per megabyte of file size. For a typical text-only novel this is a few cents and barely matters. But for a cookbook, a photography book, or a heavily illustrated children's title, the file can be many megabytes, and the fee eats into each sale.
In extreme cases, a very large ebook can earn more on the 35% tier (no delivery fee) than on the 70% tier (high delivery fee). This is rare but real, which is why running your specific file size and price through a royalty calculator beats assuming 70% is always best.
Paperbacks are paid differently. Amazon pays 60% of the list price, then subtracts a printing cost that depends on the page count and trim size. More pages and larger trim sizes mean a higher printing cost and therefore a lower royalty.
This makes page count a direct lever on your margin. A tighter interior design, an efficient trim size, and sensible formatting all reduce printing cost and lift your royalty. Check the right dimensions and their cost implications with the KDP Trim Size Guide before you finalise your interior.
If you enrol your ebook in Kindle Unlimited, you are not paid per sale. Instead you are paid per page actually read, measured in KENP — Kindle Edition Normalized Pages, a standardised page count Amazon calculates so books are comparable regardless of formatting.
Each month Amazon sets a global fund and divides it among all pages read across the programme, producing a per-page rate that fluctuates month to month. A longer book that readers finish earns more KENP than a short one, which changes the economics compared with straight sales. Estimate your potential with the KENP Royalty Estimator.
Pricing is not only about the per-copy royalty, though. A lower price can drive more sales and better ranking, while a higher price signals quality in some genres. Model a few scenarios in the calculator, then test in the market — pricing is one of the few things you can change any time after publishing.
Before you publish, work through the economics deliberately:
Beyond pricing, one choice shapes your ebook earnings more than almost any other: whether to enrol in KDP Select or distribute wide. The decision involves a genuine trade-off with no universally right answer.
Which wins depends on your genre and audience. Genres with heavy Kindle Unlimited readership — romance and many fiction categories — often earn more in Select, while non-fiction and niche titles frequently do better wide. Because Select enrolment lasts 90 days at a time, a sensible approach is to test one strategy, measure the results with a royalty and KENP estimate, and adjust. It is one of the few major decisions you can revisit regularly as you learn how your specific readers behave.
Understanding royalty rates is one thing; actually receiving the money involves a few practical details worth knowing before you publish, so the first payment does not come as a surprise.
Amazon pays royalties monthly, but only once your earnings pass a minimum payment threshold for your chosen payment method — earnings below it roll over to the next month. Payments arrive roughly 60 days after the end of the month in which they were earned, so there is a built-in delay between a sale and the money reaching your account. Sales happen across Amazon's regional stores in different currencies, and these are converted, so your income can fluctuate slightly with exchange rates.
Tax is the detail authors most often overlook. Before you can be paid, Amazon requires you to complete a tax interview to determine withholding, and authors outside the United States may have tax withheld unless a treaty between their country and the US reduces it — which usually requires providing a tax identification number. Beyond that, royalty income is taxable in your own country and must be declared. None of this is difficult, but handling the tax interview correctly at setup, and keeping records of your earnings from the start, saves considerable hassle later. Estimating your income with a royalty calculator also helps you plan for the tax you will eventually owe on it.