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Break-Even ACOS: The One Number That Decides If Your KDP Ads Make Money
Break-even ACOS is the point where an Amazon ad stops costing you money. The formula, worked examples for ebooks and paperbacks, and the list-price mistake.
How Much Do Amazon KDP Ads Cost? Real Budgets for Authors, From $5/Day Up
Amazon ads have no minimum spend: you pay per click, at auction. What book clicks cost, what $5, $10 or $20 a day buys, and how to size it from your royalty.
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One Book, Seven Currencies: Tracking KDP Profit Across US, UK, DE, FR, ES, IT & JP
The same book can profit in the US and lose money in Germany once ad VAT, withholding and currency conversion count. Why dashboards can't just be added up.
Your ACOS Is Lying: How Kindle Unlimited (KENP) Hides Your Real Ad Profit
When a Kindle Unlimited reader borrows your book from an ad, Amazon records the spend but no revenue, so ACOS looks awful. TACOS adds the KENP royalties back.
Net Profit Per Book: How to Know Which Titles Actually Make You Money
An account-level ACOS hides the losers your winners subsidise. How to compute net profit per book, the costs authors forget, and what to scale, fix or pause.
Realistic KDP Earnings: What Authors Actually Make (and the Math Behind It)
Five-figure screenshots say nothing about what KDP really pays. The honest math: what one book earns at realistic volumes, and the three levers that matter.