For a professional with a nonfiction book, self-publishing usually wins on speed, rights, and income.
Writer Cosmos cites the ALLi 2025 survey: indie authors now earn a median of $13,500 annually, nearly double the $6,000 to $8,000 median for traditionally published authors. Defining Moments Press, which publishes this comparison, supports self-publishing and lets authors keep all rights and royalties.
Traditional publishing genuinely fits authors who want a publisher to pay production costs ($0 upfront, per Manuscript Report) and who value the backing of an established house enough to give up 85 to 90 percent of royalties and wait through agent and editor review.