Before I was FIRE, one of the places I worked used this method for a lot of things, and I got into it for my job's paperwork. Then I started doing it at home. It works much better for me than piling up things in a bunch of file boxes. I agree that I probably could go more paperless and just leave statements, etc. in the computer, but for me, the binders are easy, neat, and practical. You can keep them on a bookcase. The portability is a plus. For instance, if you have to go talk to the bank about something--just pick up your "Bank" binder and go. Also agree with the convenience of writing notes --good way to have documentation of phone calls you've made.