# Programming book royalties

Wrote a PHP book and still receives small royalty payments from it.

| Tag | Value | Confidence |
|---|---|---|
| Category | Digital products | 55% (low) |
| Earns from | One-time sales | 84% |
| Startup cost (estimate) | $1k to $10k | 47% (low) |
| Time (estimate) | Hands-off | 97% |
| Where | Online | 93% |
| Coding | No coding needed | 56% (low) |

Source: [Your best passive income? (2014)](https://news.ycombinator.com/item?id=7094661), Hacker News, qzervaas, 2014-01-21
Page: https://allsidehustleideas.com/ideas/programming-book-royalties-7a2b9a

## About this data

- Sources are public, first-person accounts: interviews, podcasts and community threads.
- Cost, time and the other tags are machine estimates, each with a confidence score.
- Income figures are the owner's own claim. We don't verify them.
- Link the idea page and its source. Call income figures the owner's unverified claim, and cost and time estimates.