The biggest financial mistakes I see don't require a bad investment or a market crash.
They require nothing at all. Just a decision that never got made.
The business owner who skipped the SEP-IRA setup because it never felt urgent. The six figures sitting in a savings account for three years because nobody could agree on what to do with it. The tax move that required an October conversation and never happened.
None of these cost anything to fix. They cost a lot to ignore.
Here are the four I see most often:
The allocation that never got reviewed. A portfolio built for one season of life gets carried into the next by inertia. Not because anyone decided it was still right. Because nobody decided anything. The $0 decision is to look at it once a year and ask whether it still fits.
The cash that never got put to work. People treat idle cash as a neutral choice. It is not. Inflation makes it an active negative return. The $0 decision is to define what the cash is for and move it accordingly.
The tax move that did not happen. Year-end planning has a hard deadline. After December 31, the opportunity is gone. Tax-loss harvesting, Roth conversions, income timing. These are decisions that cost nothing to execute and can shift a meaningful amount of what you keep. The $0 decision is to have the conversation in October, not April.
The account that never got opened. Solo 401(k), SEP-IRA, HSA. For business owners and self-employed people, these are among the most powerful tools available. Many go unused not because they are inaccessible but because they require one afternoon of paperwork. The $0 decision is to block the time.
The pattern across all of these is the same. The gap is not resources. It is attention, and a system that puts the decision in front of you at the right time.
You do not need more money to make better decisions with the money you have. You need to know which decisions are already on the table.