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Author Royalty Calculator

Enter the list price, royalty rate, copies sold and return rate to get the royalty.

How it is calculated

The tool first removes returns, then applies the royalty to the cover price: net copies = copies sold × (1 − return rate ÷ 100) and royalty = net copies × list price × royalty rate ÷ 100. Royalty rate and return rate are entered as percentages. The return rate is optional and counts as 0 if left blank; it must be between 0 and 100. List price, royalty rate and copies must not be negative. Amounts are shown in US dollars. The royalty is calculated on the list (cover) price. Contracts that pay on net receipts, discounted sales, or different rates for different formats and sales tiers are not modelled, and neither are advances, reserves against returns or agent commission.

Worked example

A book lists at 24.99, the contract pays 10% of list price, 5,000 copies shipped and sold in, and 20% come back as returns. Net copies = 5,000 × (1 − 0.20) = 4,000. Royalty = 4,000 × 24.99 × 10% = $9,996.00. Without the returns the same sales would show $12,495.00, so the 1,000 returned copies cost the author $2,499.00. If the statement shows an advance already paid, subtract it from this figure to see what is still owed.

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Common mistakes

  • Ignoring returns. Copies shipped to stores are not the same as copies that stayed sold, and statements pay on the net.
  • Entering the royalty rate as a decimal (0.10). The field takes percent, so 10 means 10%.
  • Using the price the retailer charges instead of the list price. The tool multiplies by the price you enter, so use the one your contract names.
  • Applying one rate to everything. Contracts often use different rates for hardcover, paperback, ebook and export sales, so run each format separately.
  • Forgetting the advance. Royalties usually first earn out the advance, so a positive figure here is not necessarily a payment.

About this calculator

Publishing royalty statements are calculated net of returns: bookstores and distributors can send unsold copies back to the publisher, so the author is only paid on copies that actually stayed sold. The math is list price × royalty rate × copies sold × (1 − return rate), mirroring how real royalty runs are reconciled twice a year.

Authors, literary agents, and small presses use this kind of estimate to sanity-check an advance against likely earnings, or to forecast a royalty statement before it arrives, since standard trade contracts typically pay 7-15% of list price on hardcovers and less on paperback and digital editions.

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