Passive Income – Be on the Right Side of Change

How Often Can You Publish on KDP? 3 a Day Max, but Monthly Hits 25 Books in 25 Months

October 22, 2026 by Michael

Featured chart: months to reach 25 live KDP books by release cadence: 300 months at one a year, 75 quarterly, 50 every two months, 25 monthly (highlighted) and 12 every two weeks; 25+ books is where Written Word Media's 2025 survey finds a median of about $3,000 a month

How often can you publish on KDP? Up to 3 new titles a day, but 25+ books matters more: one a month gets you there in 25 months. Python math inside.

How to Price KDP Ebook Series: $3.99 Wins Alone, a $0.99 Book 1 Earns 2.1× on 5 Books

October 22, 2026 by Michael

Featured chart: royalties per 100 promo shoppers on a five-book KDP ebook series by Book 1 price, Books 2-5 at $4.99: $749 at $0.99 (highlighted, 2.1 times $3.99), $392 at $1.99, $340 at $2.99, $363 at $3.99 and $239 at $4.99

How to price KDP ebook series: $3.99 earns most for a standalone, a $0.99 Book 1 earns 2.1x across 5 books, and paid ads favor $3.99. Python model inside.

Build a KDP Royalty Calculator in Python: One Cent Past $12.99 Costs You 49%

October 20, 2026October 9, 2026 by Michael

Line chart of Kindle ebook royalty per sale by list price from $0.99 to $30: $12.99 pays $8.99, $13.00 pays $4.55, a 49% drop when the price leaves the 70% royalty band.

KDP’s royalty rules fit in about 30 lines of Python. Run them and three pricing cliffs appear: $12.99 vs $13.00 on ebooks, $9.98 vs $9.99 on paperbacks, and file size at $2.99.