The hedonic treadmill

You get a raise. You're thrilled for a week. A month in, you're used to the new salary, your spending has crept up to match, and you're no happier than before. This is the hedonic treadmill: humans rapidly adapt to new standards, positive or negative, and return to a baseline level of happiness.

Why it matters for money

The treadmill is the reason 'more money' is a disappointing goal. Beyond covering needs and basic comforts, additional spending buys less and less happiness per dollar. A Princeton study famously pegged the effect around a household income of ~$75k (now probably closer to $100k inflation-adjusted) — past that point, more income barely moves emotional well-being at all.

Beating the treadmill

• Save some portion of every raise before you notice the raise.
• Direct extra money toward experiences, time, and giving — these show up in well-being data much more strongly than goods.
• Use a waiting period for any 'upgrade' purchase over $500. If you still want it in a month, go ahead. Most of them lose their pull.
• Occasionally downgrade something on purpose. Going from business class back to economy is a reminder that you once adapted — and how easy it is to adapt again.