From a recent NYTimes article:
The catch is that additional income doesn’t buy us any additional happiness on a typical day once we reach that comfortable standard. The magic number that defines this “comfortable standard” varies across individuals and countries, but in the United States, it seems to fall somewhere around $75,000. Using Gallup data collected from almost half a million Americans, researchers at Princeton found that higher household incomes were associated with better moods on a daily basis — but the beneficial effects of money tapered off entirely after the $75,000 mark.
Why, then, do so many of us bother to work so hard long after we have reached an income level sufficient to make most of us happy? One reason is that our ideas about the relationship between money and happiness are misguided. In research we conducted with a national sample of Americans, people thought that their life satisfaction would double if they made $55,000 instead of $25,000: more than twice as much money, twice as much happiness. But our data showed that people who earned $55,000 were just 9 percent more satisfied than those making $25,000. Nine percent beats zero percent, but it’s still kind of a letdown when you were expecting a 100 percent return.
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