Most authors think they know what a royalty is, until the first royalty statement arrives and a $5,000 advance turns into $0 in additional income for the year. This book royalty calculator turns the three numbers you actually control — the book price, the royalty rate, and copies sold — into a clear earnings picture, then layers in the advance so you can see exactly when your book "earns out" and starts paying you again.
Type in a cover price, a percentage, and a sales count. Every figure on the result card updates instantly: what you earn per copy, what you have earned in total, how much of the advance has been recouped, the net amount the publisher still owes you, and how many additional copies you need before the book becomes profitable for you rather than for the advance.
How to Use
- Enter the Book Price — the list price of one copy. For a paperback this is usually $14.99–$17.99; for a Kindle ebook it is commonly $2.99–$9.99; for a hardcover $26.99–$32.00. Use the gross list price, not the retailer's discounted price.
- Set the Royalty Rate. Traditional publishers pay 8–15% of list, often sliding down after certain sales breakpoints. Amazon KDP's 70% tier applies to ebooks priced between $2.99 and $9.99; the 35% tier applies outside that band. Pick the rate your contract actually promises.
- Enter Copies Sold — lifetime units, or the units in the period you are modeling. You can type 0 to see the break-even position before any books move.
- Add your Advance if one was paid. This is the money the publisher gave you up front, against future royalties. If you self-publish and received no advance, leave it at 0.
The result card breaks the math into six lines. Royalty per Copy is the dollar amount you keep from each sale. Total Earned Royalties is that figure multiplied by copies sold. Advance Recoupable restates the advance. Net Owed to You is the headline number: once earned royalties exceed the advance, this is the cash the publisher owes beyond what you already received. Unrecouped Advance Left is how much more you must earn before the book "earns out." Copies Needed to Earn Out translates that gap into a unit target you can actually plan against.
How Book Royalties Are Calculated
The formula is deliberately simple, because the confusion in real contracts comes from the fine print rather than the arithmetic itself:
Royalty per Copy = Book Price × Royalty Rate ÷ 100
Total Earned Royalties = Royalty per Copy × Copies Sold
Net Owed to Author = max(0, Total Earned Royalties − Advance)
Worked example on a $15 book at a 10% royalty with 5,000 copies sold and a $5,000 advance: per-copy royalty is $1.50; total earned royalties are $1.50 × 5,000 = $7,500. Subtract the $5,000 advance and the publisher still owes you $2,500. The book has earned out; every future copy from here on puts $1.50 straight into your pocket.
If instead only 2,000 copies sold, total earned royalties are $3,000 — below the $5,000 advance. The net owed is $0, and $2,000 of the advance remains unrecouped. Unless the book sells another 1,334 copies (ceil($5,000 ÷ $1.50)), you will not see another royalty check from that title.
Why the Advance Matters More Than the Rate
A 15% royalty on a $28 hardcover sounds fantastic until you compare it against a smaller advance. Publishers recoup the advance dollar-for-dollar before you receive any additional payment, so a high rate on a slow-selling book can leave you with the same $0 as a low rate on a fast-selling one. The two numbers that decide your income in year one are (a) how quickly you earn out, and (b) how many copies you sell after that point.
Use the slider on this page to stress-test scenarios. Raise the royalty rate from 10% to 25% and watch copies-to-earn-out drop from 3,334 to 1,333 — a meaningful change in how quickly you start earning. Raise copies sold from 5,000 to 50,000 and the net owed line leaps from $2,500 to $70,000, which is the real lever: post-earnout volume is where an author actually makes money.
Traditional vs Self-Publishing Royalties
Traditional contracts pay on the list price but deduct returns, discounts, and printing, so a "10% royalty" often nets closer to 7–8% of list in practice. Self-published platforms like KDP, IngramSpark, and Draft2Digital pay on the net revenue after retailer cut, which is why the headline 70% KDP rate still leaves you with roughly 50–60% of the list price once delivery fees and VAT are stripped out. This calculator uses a clean list-price model, so enter the effective percentage you actually expect to keep, not the marketing number on the contract's cover page.
Examples
Example 1 — The standard midlist deal. A $15 trade paperback at 10% royalty, 5,000 copies sold, and a $5,000 advance. Per-copy royalty is $1.50; total earned royalties are $7,500; after the advance, the publisher owes you $2,500. The book has earned out, and the next 10,000 copies will pay you another $15,000.
Example 2 — A book that has not earned out. The same $15 book at 10% with only 2,000 copies sold against a $5,000 advance. Total earned royalties are $3,000, leaving $2,000 unrecouped. You need roughly 1,334 more copies before you see a cent beyond the advance. If your publisher's contract caps royalties, this is the moment to evaluate whether further promotion is worth your time.
Example 3 — A self-published ebook on KDP's 70% tier. Price an ebook at $4.99, take the 70% rate, and sell 10,000 copies with no advance. Per-copy royalty is about $3.49; total earned royalties are roughly $34,930, all of which is net owed to you because there is no advance to recoup. Slide the rate to 35% and the same 10,000 copies pay only about $17,465 — the tier choice matters more than most authors realize.
Example 4 — A breakout hit at scale. A $15 book at 10% royalty with 1,000,000 copies sold and a $5,000 advance. Total earned royalties are $1,500,000, and net owed to you is $1,495,000. This is the range where agents begin renegotiating mid-contract bonuses, because the advance looks comically small next to the actual sales.
FAQ
How is book royalty calculated?
Royalty is book price multiplied by royalty rate, multiplied by copies sold. For a $15 book at 10%, each copy earns $1.50; selling 5,000 copies earns $7,500 in total. Subtract any advance already paid and the remainder is what the publisher owes you on top.
What is a typical royalty rate for a book?
Traditional US trade publishers pay around 8–15% of list price for hardcovers and paperbacks, often dropping to 7.5% after a sales breakpoint. Amazon KDP pays 35% or 70% of net revenue on ebooks; IngramSpark and Draft2Digital typically pay 40–60% of net. Enter the effective percentage you actually expect, not the headline number.
What does "earn out" mean?
A book earns out when total earned royalties exceed the advance the publisher paid up front. Until that point, every sale only pays back the advance; after that point, every sale pays you directly. This calculator shows the exact number of copies you need to cross that line.
How many copies do I need to sell to earn out a $5,000 advance?
Divide the advance by your per-copy royalty. On a $15 book at 10% royalty, per-copy earnings are $1.50, so $5,000 ÷ $1.50 = 3,334 copies. Raise the rate to 25% and that target drops to 1,334 copies.
Do I get paid the advance and the royalty on top?
Not simultaneously. The advance is a pre-payment of royalties. You receive it up front, but the publisher deducts it from future royalty checks until it is fully recouped. Only after earned royalties exceed the advance do you begin receiving additional royalty payments.
What is the difference between 70% and 35% KDP royalty?
Amazon's 70% tier applies to ebooks priced between $2.99 and $9.99 (and comparable local-currency ranges), after a per-MB delivery fee. The 35% tier applies outside that band. On a $4.99 ebook, the 70% tier pays roughly $3.49 per copy before delivery fees; the 35% tier pays about $1.75.
Disclaimer
This book royalty calculator is provided for informational purposes only and does not constitute legal, publishing, tax, or financial advice. It uses a simplified list-price model and ignores returns, retailer discounts, printing charges, delivery fees, VAT, withholding, sliding royalty scales, and subsidiary rights income that appear in real publishing contracts. Actual earnings depend on your specific agreement, distribution channel, and territory. Always confirm your royalty terms with your agent, publisher, or accountant before making publishing decisions.