TL;DR: I keep my household expenses very low (roughly $30k/year) and save a very high percentage of my income so that I can retire very early. The pandemic changed my plans a bit, but I’m expecting to be done by age 45. (By the way, to address a common criticism of the idea: "retire"means doing whatever I want without being beholden to working for a wage, not necessarily vegging out in front of the TV and stagnating as certain workaholics assume. The important distinction is that I could choose to work if I wanted, but wouldn’t need to.)