The research on decision fatigue is straightforward enough to have entered popular understanding: the quality of human judgment declines over the course of a decision-making session, with later choices showing systematically worse outcomes than earlier ones regardless of the stakes involved. Judges issue harsher parole decisions late in the day. Shoppers make worse dietary choices at the end of a grocery run. Executives approve worse proposals in the final hour of a board meeting. The mechanism is neurological, not motivational — willpower and judgment draw on a shared cognitive resource that depletes with use.

Money is a renewable resource. You can earn more, borrow more, find more. Time is not. The asymmetry between them is obvious enough that most people acknowledge it in the abstract and ignore it in practice — spending hours to save dollars, structuring their lives to preserve financial capital while treating temporal capital as inexhaustible. The bootstrapped operator who learns to account for time the way accountants account for money has a structural advantage that compounds in ways money can’t replicate.