There are two possibilities: 1. There are people who like to create complex analysis/structure around their lives. I don't say they are unnecessarily complicat

There are two possibilities: 1. There are people who like to create complex analysis/structure around their lives. I don't say they are unnecessarily complicating their lives, because that's part of their personality. So, yes, you are correct. An double-entry ledger doesn't add much insights. 2. After $200k/year income and $1m+ wealth, and if your wealth is very diversified (inherently complex), then I can see the value in it. ie: An engineer with $200k has less complexity than a freelance with $200k/year. At a certain point the freelance will benefit from an accountant, but maybe he's running some stuff in the dark economy or something.