Book royalties are considered taxable income by the IRS. You are required to report them on your tax return whether you earn $50 or $50,000. The reporting process depends on how much you earn and how your publishing activity is structured.

If you earn $600 or more from a single platform, that platform will typically issue a 1099-MISC or 1099-NEC. Amazon KDP, IngramSpark, Draft2Digital, and similar services all follow this rule for U.S.-based authors. If you earn less than $600, you may not receive a form, but you are still legally required to report the income.

Most self-published authors file as sole proprietors. In this setup, publishing income is reported on Schedule C (Profit or Loss from Business) as part of your personal tax return. This is the simplest structure and does not require forming a separate business entity.

You can deduct many self-publishing expenses. As a business, your publishing activity allows you to deduct ordinary and necessary expenses, including:

• Editing and proofreading
• Cover design and formatting
• ISBN purchases
• Advertising and marketing (Amazon ads, promotions, newsletters)
• Software and subscriptions
• Website hosting and domain costs
• Courses, conferences, and professional development
• Home office expenses (if you have a dedicated workspace)

These deductions reduce your taxable income, which can significantly lower how much tax you owe. Keep clear records and receipts for all business-related expenses.

Self-employment tax is a key factor. In addition to income tax, your net earnings are subject to self-employment tax (15.3%), which covers Social Security and Medicare. This applies to most self-published authors operating as sole proprietors.

Quarterly estimated taxes may be required. If you earn consistent income, making estimated payments throughout the year can help you avoid penalties when filing your return.

International authors should be aware of withholding rules. U.S. platforms may withhold taxes on royalties unless you submit a W-8BEN form to claim treaty benefits. The withholding rate depends on your country of residence.

As your income grows, professional advice becomes valuable. A CPA or tax advisor familiar with self-employment income can help you identify deductions and structure your publishing activity efficiently.

Disclaimer: This information is general in nature and not tax advice. Tax laws change, and individual situations vary. Consult a qualified tax professional for guidance specific to your situation.

Sources:

• IRS Publication 525: Taxable and Nontaxable Income
• IRS Schedule C Instructions
• IRS Self-Employment Tax Information