The author income estimator projects your monthly and annual writing income across all formats — ebooks, paperbacks, and audiobooks. It also calculates your net income after self-employment tax and business expense deductions, so you know what you'll actually keep.
Monthly Sales Estimates
Ebooks
Paperbacks
Audiobooks
Editing, ads, software, home office, etc.
Income Summary
Enter your sales estimates to see income summary.
How to Estimate Your Author Income
Author income projections help you plan whether self-publishing can replace or supplement employment income. The challenge is that most online income reports come from outlier success stories — the actual median is significantly lower. This calculator helps you model realistic scenarios based on your specific royalty rates and sales targets.
Step 1: Enter Royalty Per Copy for Each Format
Use the KDP Royalty Calculator to find your exact ebook royalty. For a $4.99 ebook at 70%, you earn approximately $3.47. For paperbacks, enter the net royalty after print cost. For audiobooks on ACX exclusive, the royalty is typically 25% of list price. Each format has a different royalty rate, so track them separately.
Step 2: Set Realistic Sales Estimates
Genre context matters enormously. A romance novel in a popular subgenre might sell 200–500 ebooks/month with AMS ads. A nonfiction book on a narrow topic might sell 20–50 ebooks/month organically. Paperbacks typically represent 15–25% of ebook volume; audiobooks 10–20%. Start with conservative estimates and adjust upward as you gather data from your first 90 days on sale.
Step 3: Account for Business Expenses and Taxes
Self-employed authors pay 15.3% self-employment tax on net income. Enter your monthly deductible expenses (advertising, software, editing) to see taxable income. For income tax planning, budget an additional 10–22% for federal income tax depending on your bracket. A simple rule: set aside 30–35% of net royalty income for taxes before spending the rest.
FAQ
What self-employment tax rate applies to author income?
Self-published authors who earn income are considered self-employed and pay self-employment (SE) tax of 15.3% on net earnings (12.4% Social Security + 2.9% Medicare). This is in addition to federal and state income tax. The 15.3% SE tax applies to the first $168,600 of net earnings in 2026. You can deduct 50% of SE tax paid from gross income before calculating income tax.
What business expenses can authors deduct?
Authors can deduct ordinary and necessary business expenses: editing fees, cover design, formatting, marketing and advertising, home office (if dedicated workspace), writing software and tools, research books and courses, professional memberships, and a portion of internet and phone costs. Keep receipts for all deductions. The deductions field in this calculator reduces your taxable income.
Is Kindle Unlimited (page read) income included?
This calculator uses per-copy sales figures. Kindle Unlimited income from page reads (KENP) is separate — typically $0.004–$0.005 per page read. If you're in KDP Select, add your estimated monthly KENP income to the ebook royalty field or track it separately. KENP income is also subject to self-employment tax.
How much do successful indie authors earn?
Author income varies enormously. According to multiple surveys, 50% of indie authors earn under $500/year from book sales. Authors earning $50,000+/year typically publish multiple books per year in high-demand genres (romance, thriller, cozy mystery), have an email list of 5,000+ subscribers, and reinvest 20-30% of income into advertising. The path to significant income is volume plus audience.
How do quarterly estimated taxes work for authors?
Self-employed authors earning more than $1,000/year in net income must pay quarterly estimated taxes (April, June, September, January). The IRS requires estimated payments to avoid underpayment penalties. For planning, estimate 25-30% of net income for combined federal taxes (15.3% SE + income tax bracket). State taxes apply separately in most states.