Killingsworth · Proceedings of the National Academy of Sciences of the United States of America 2021 · observational experience-sampling study · n=33,391

Experienced well-being rises with income, even above $75,000 per year.

Cited 269 times in the scientific literature.

Level 3 - non-randomized controlled study

Level 3 by design analogy (large-scale observational experience-sampling study; non-clinical).

PubMed 33468644 · doi:10.1073/pnas.2016976118 · record verified 2026-08-28

What was done

Researchers analyzed 1,725,994 real-time experience-sampling reports collected from 33,391 employed United States adults to assess the relationship between income and two distinct dimensions of well-being: experienced well-being (momentary feelings) and evaluative well-being (reflective life satisfaction).

What was found

Both experienced and evaluative well-being increased linearly with log(income), maintaining an equally steep slope across lower and higher earners. There was no evidence of a plateau above $75,000 per year or a threshold where experienced and evaluative well-being diverged (exact effect sizes and confidence intervals were not reported in the abstract).

Why it matters

This paper challenges the widely cited prior finding that emotional well-being plateaus above $75,000 per year, indicating that higher income continues to correlate with both better daily emotional states and greater overall life satisfaction.

Limits

The abstract describes an observational, correlational dataset among employed US adults, precluding causal inference. Specific numerical estimates, effect sizes, statistical intervals, and adjustments for potential confounders (such as local cost of living, baseline wealth, or working hours) are not reported in the abstract.

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