What SEO actually costs when you do it yourself
Agencies quote thousands a month and you need to know what the work is worth if you do it yourself.
The cash cost was close to zero
A domain, hosting on a free tier, and no advertising. Search Console and the second engine's tools are free. Nothing in this project's result required a paid keyword tool at any point.
The time cost was real and front-loaded
181 commits over eight months. The expensive part is not any single page, it is sustaining output across months where the chart does not move, which is a psychological cost more than a scheduling one.
The mistakes cost more than the tools
Five costed mistakes on this project, two of which risked a penalty, and one channel outage that lasted 31 days and was fixed by an action that took two minutes once attempted. Nothing bought would have prevented any of them.
$0 in spend, and the real bill
This site spent nothing on advertising and nothing on agencies to reach 100,542 users. The bill was paid in months, and in work that turned out to be wasted: 93 of 160 pages under 10 clicks, a head term that returned 45 after a sustained effort, and a long period with no visible return. That is the honest price, and it is not zero.
Where money is actually worth spending
Almost nowhere, early. A rank tracker you will misread and an audit tool that flags 400 issues that do not matter are the two most common first purchases and neither changes an outcome. If you spend anything, spend it on hosting fast enough not to be a problem, and on whatever removes friction from publishing. Everything else is a tax on impatience.
Measured, not asserted
$0 on advertising, 100,542 users, 224 days, 181 dated commits. The full accounting, including what each mistake cost, is in the book.
Free tool for this: Position Value Calculator. No account, nothing uploaded.
Where this goes deeper
Every number on this page comes from one complete dataset: one product taken from zero to 100K+ users on search alone, with nothing spent on advertising. The full argument is Chapter 29 and Chapter 34 of the book. Five chapters are free to read.