It is one of the most searched questions in self-publishing, and one of the hardest to answer honestly, because the honest answer is "it depends, enormously". This guide does not offer a figure, an average, or a case study, because none of those would be reliable. Instead, it sets out the variables that actually determine income, so you can build a realistic sense of your own likely range rather than borrowing someone else's number.
If you are looking for marketing tactics rather than an income discussion, our guide on [how to market a book](/resources/book-marketing/how-do-i-market-my-book) covers that ground separately.
Revenue versus profit
The amount a reader pays for a book is not the amount an author keeps. Retailers take a share, printers charge for physical copies, and any money spent on editing, design or advertising has to come out before what is left can be called profit. A book that sells steadily can still leave an author with very little if its costs were high relative to its price and royalty.
What does this mean?
Revenue
The total amount received from sales, before any costs are deducted.
Royalties
Royalty structures vary by platform, format and price band, and by whether a book is distributed exclusively through one retailer or wide across several. Royalty rates and thresholds are set by each retailer and can change, so check the current royalty terms of any platform you publish through rather than relying on older figures.
Print cost
For print-on-demand books, the printing cost for each copy is deducted before royalty is calculated, and that cost depends on page count, trim size, ink (colour versus black and white) and paper choice. A longer or full-colour book can cost meaningfully more to print, which reduces the royalty left on each sale even at the same cover price.
Advertising
Money spent on advertising, whether through Amazon Ads, social platforms or other paid promotion, is a cost that needs to be weighed against the royalty a book actually earns per sale. Advertising can extend a book's reach, but it is a cost like any other, not a guarantee of proportional extra income.
Editing and design investment
Professional editing and cover design are typically one-off or per-book costs, paid before a book earns anything at all. These are investments in the book's ability to sell and to be taken seriously by readers, but they reduce net income, particularly on a book's early sales, until that upfront cost is recovered.
Number of books
Authors with a single title are entirely dependent on that one book's performance. Authors with several books, particularly in the same genre or series, often see each additional title support the others, as readers who finish one book may go on to buy more from the same author. This is one of the more consistent patterns in self-publishing, though it still depends on the books themselves holding reader interest.
Series
A well-received series can compound in a way a single standalone title cannot, because later books benefit from readers discovering the series partway through and going back to the beginning. This does not happen automatically; it depends on the first book being strong enough to convert readers into series readers.
Backlist
Over time, a backlist of several books can produce a more stable income than any single title, since it is less dependent on one launch and continues to earn, at whatever level, as new readers discover older titles. Building a backlist takes years, not months, and the pace varies by how quickly an author can produce further books to a comparable standard.
Genre
Reader demand, typical price points and typical reading pace vary substantially by genre. Genres with large, active reading communities and habitual repeat purchasing (some romance and mystery subgenres, for example) behave differently from genres with smaller or slower-reading audiences, and this affects the realistic ceiling and pace of any given book's earnings.
Pricing
Price affects both royalty per sale and how many readers are willing to buy, and the relationship between the two is not fixed; a higher price does not automatically mean more income, and neither does a lower one. Pricing decisions are usually better made by looking at comparable current titles in the same genre and format than by assuming any single price point is universally right.
Direct sales
Some authors sell books directly to readers, through their own website or at events, which can carry a higher margin than retailer sales because there is no retailer share to give up, though it usually reaches far fewer readers than retail distribution and comes with its own costs, such as payment processing and postage.
Audiobooks and rights
Audiobook editions and rights sales (such as translation or, occasionally, film or TV options) can add further income streams beyond print and ebook sales, though they are not available to or achievable by every author or every book, and each comes with its own costs, terms and, in the case of rights sales, timelines that can be long and uncertain.
Speaking and consulting
Some non-fiction and business authors generate more income from speaking engagements, consulting or courses connected to their book's subject than from the book itself. This route depends on factors well beyond the book's content, including an author's existing network, willingness to pursue that kind of work, and the market for their particular expertise.
Long-term audience
An audience built over years, through an email list, a body of published work or a following in a particular niche, tends to produce steadier results than any single launch. This is a long-term outcome of consistent publishing and audience-building, not something a single book or campaign reliably produces on its own.
Exceptional success versus normal outcomes
Stories about authors who earn substantial, life-changing income from self-publishing do genuinely exist, and they get shared widely precisely because they are unusual. Building a realistic financial plan around an exceptional outcome, rather than around typical outcomes for a comparable book and effort level, tends to lead to disappointment and, sometimes, poor financial decisions such as overspending on advertising in the hope of similar results.
Why income claims are dangerous
Published figures for "average author earnings" are usually built on incomplete, self-selected or outdated data, since there is no comprehensive way to survey every self-published author's actual income. Relying on such a figure, whether it sounds encouraging or discouraging, risks setting expectations, budgets and business decisions on ground that is not solid. This guide deliberately does not offer one.
Building a realistic model
Rather than looking for a figure to aim for, it is more useful to build a simple model specific to your own book: your royalty per sale after retailer share and, for print, printing costs; your upfront costs for editing, design and any ISBN; and a conservative view of how many books you might reasonably sell in a given period, informed by comparable titles in your genre rather than hope. Revisiting and adjusting that model as real sales data comes in is more useful than any single external benchmark.
Questions worth answering for your own book
- What is the royalty per copy, after retailer share and any print cost?
- What did the book cost to produce, in total, before it earned anything?
- How many books are you realistically planning to publish, and over what period?
- Is any of the book's value expected to come from outside direct sales, such as speaking or consulting?
- What would make you pause or change course, rather than continuing to spend on hope alone?
Common mistakes
- Treating revenue as income. Overlooking retailer share, print costs, editing, design and advertising spend when estimating what a book actually earns.
- Planning around an exceptional outcome. Using a widely shared success story as the expected result, rather than a typical outcome for a comparable book.
- Trusting a published "average author income" figure. Treating an unreliable, incomplete statistic as a genuine benchmark for personal planning.
- Judging a book's value only by direct sales. Missing indirect value, such as credibility for business or speaking work, that some non-fiction books genuinely provide.
- Expecting a single book to represent a full income. Underestimating how much a backlist, series or long-term audience typically contributes compared with any one title.
Frequently asked questions
Is there a reliable average income figure for self-published authors?
No. Published averages are generally based on incomplete or self-selected data and should not be treated as a dependable benchmark for what any individual author will earn.
Can self-publishing replace a full-time income?
For some authors, over time, with a substantial backlist and strong reader base, yes. For most, a single book or a small number of books is unlikely to replace a full-time income on its own, particularly early on.
Does having more books increase income?
Often, yes, because a backlist and series can support each other, though this depends on the books themselves holding reader interest, not simply on publishing more titles.
Should I factor in advertising spend when estimating income?
Yes. Advertising is a cost that reduces net income unless it generates enough additional sales to cover itself, and it should be weighed against your actual royalty per sale.
Can a book earn money in ways other than direct sales?
Yes, for some authors. Non-fiction and business books in particular can support speaking, consulting or client work, which may generate more income than the book itself.
