"Giving makes you happy" is one of the most repeated lines in self-help. The research behind it is real, interesting, and more modest than the headlines. Here is what the key studies found, what happened when scientists checked them again, and what you can reasonably take from them.
Spending on others: the study that started a field
In 2008, psychologists Elizabeth Dunn, Lara Aknin and Michael Norton published a short paper in Science with a simple claim: how you spend money may matter as much for happiness as how much you earn. They reported three kinds of evidence. In a survey, people who spent more of their income on others were happier. In a field study, employees who spent more of a work bonus on others reported more happiness afterward. And in an experiment, people randomly handed money and told to spend it on someone else ended the day happier than people told to spend it on themselves (Dunn, Aknin & Norton, 2008).
The idea traveled because it was surprising and cheap to try. It also raised the question every good finding should: does it hold up?
Does it hold across cultures?
The same research group went looking for the effect outside North American college towns. Using survey data from 136 countries, they found that giving to others was associated with greater happiness in poor and rich countries alike. Experiments in Canada, Uganda and India showed that simply recalling a time you spent money on someone else raised happiness, and a study in Canada and South Africa found that buying items for charity produced more positive feelings than buying the same items for yourself, even when the giving offered no chance to build a friendship (Aknin et al., 2013; APA press summary).
That last detail matters. One easy explanation for "giving feels good" is that it strengthens relationships. The South Africa and Canada results suggest the good feeling shows up even when no relationship is at stake.
What happens in the brain
Brain-imaging studies add a different kind of evidence. They can't tell you whether you will be happier next month, but they can show which systems light up when people give.
- Giving looks like reward. When volunteers in an fMRI scanner chose to donate to real charities, the brain's mesolimbic reward system responded much as it does to receiving money (Moll et al., 2006, PNAS).
- Choosing to give adds a "warm glow." In a University of Oregon study, even mandatory, tax-like transfers to a food bank activated reward areas, but activity rose further when the transfer was voluntary. The authors read this as evidence for both pure altruism and the warm glow of choosing to give (Harbaugh, Mayr & Burghart, 2007; ScienceDaily summary).
- A promise can shift the brain. In a Zurich study, people who publicly pledged to spend money on others over four weeks made more generous choices in the lab and reported larger gains in happiness than people who pledged to spend on themselves. Activity linking a region involved in generous decisions with the reward system tracked those changes (Park et al., 2017, Nature Communications; University of Zurich release).
These are small studies. The Zurich experiment, for example, had about 50 participants. They are best read as pieces of a puzzle, not proof that generosity rewires you.
Even toddlers seem to feel it
One of the most charming findings comes from children under two. Researchers gave toddlers treats and watched their faces. The children looked happier giving treats to a puppet than receiving treats themselves, and happier still when they gave away their own treat rather than an extra one that cost them nothing (Aknin, Hamlin & Dunn, 2012). That suggests the good feeling from giving starts early and isn't only something we're taught. If you're raising kids, our guide to teaching kids generosity builds on that head start.
The honest part: what happened in replications
Psychology has spent the last decade re-running its famous studies with bigger samples, and prosocial spending was put through that test too. The results are encouraging but humbling.
- The original authors re-ran it themselves. In a pre-registered replication, 712 students who bought something for a stranger in need reported more momentary happiness than those who bought for themselves. But in a large online study of 1,950 adults, simply recalling a past act of giving did not raise happiness. A revised version with 5,199 people found an effect, but a small one. The authors concluded that giving does promote happiness, and that the size of the effect depends on how the study is run (Aknin, Dunn, Proulx, Lok & Norton, 2020).
- An independent team re-ran the 2008 experiment. The original had 46 people. A 2022 replication with 133 people found no significant difference using the original analysis, though a more direct happiness measure did point the same way as the original (Kim et al., 2022, PLOS One).
- A meta-analysis put a number on it. Pooling 27 studies with 4,045 people, researchers found that performing acts of kindness gives the doer a small-to-medium boost in well-being (δ = 0.28), with no sign of publication bias (Curry et al., 2018, Journal of Experimental Social Psychology).
Quick take: Giving reliably nudges happiness upward, but it's a nudge, not a cure. It works best when the act is real and engaging, not a box you tick.
Volunteering and health
You will often read that volunteers live longer. The best-known evidence is a meta-analysis of organizational volunteering among adults 55 and older. Before adjusting for anything, volunteers had a 47% lower risk of dying during study periods; after adjusting for health and other factors, the reduction was 24% (Okun, Yeung & Brown, 2013).
Two cautions. First, these are observational studies: healthier, more connected people may simply be more likely to volunteer, and adjustment can't remove all of that. Second, the gap between the 47% and 24% figures shows how much of the raw difference comes from who volunteers in the first place. It's fair to say volunteering is associated with better health in later life. It's not fair to promise it will add years. Our volunteering guide covers how to start, and if you need to keep records for a school or court program, a simple volunteer service hours log saves the paperwork.
Key studies at a glance
| Study | What they did | What they found |
|---|---|---|
| Dunn, Aknin & Norton (2008), Science | Survey, bonus field study, small experiment | Spending on others predicted and produced more happiness |
| Aknin et al. (2013), JPSP | 136-country survey plus experiments in five countries | Link between giving and happiness held across rich and poor countries |
| Moll et al. (2006), PNAS | fMRI during real charity donations | Reward circuitry responded to donating as to receiving money |
| Harbaugh et al. (2007), Science | fMRI, forced vs. voluntary transfers to a food bank | Both activated reward areas; voluntary giving more so |
| Aknin, Hamlin & Dunn (2012), PLOS One | Toddlers giving treats | Children under two looked happier giving, especially their own treats |
| Park et al. (2017), Nature Comms | Generosity pledge plus fMRI (about 50 people) | Pledgers acted more generously and reported more happiness |
| Curry et al. (2018), meta-analysis | 27 studies, 4,045 people | Kindness gives a small-to-medium well-being boost |
| Aknin et al. (2020), registered replication | Three high-powered experiments | Effect real but its size depends on study design |
| Okun et al. (2013), meta-analysis | Observational studies of volunteers 55+ | 24% lower adjusted mortality risk (association, not proof) |
How to use the research (without overselling it)
The researchers' own reviews point in a consistent direction. A Greater Good Science Center white paper for the John Templeton Foundation pulled together the biology, psychology and sociology of generosity and is a good long read if you want the full picture. For everyday life, a few practical lessons fall out of the studies above:
- Make it real, not remembered. Doing something generous today showed clearer effects than recalling an old act of giving.
- Choose it freely. The warm-glow findings suggest the choice itself is part of the reward. Pressured giving tends to feel worse.
- Small counts. The 2008 experiment used modest sums. You don't need a big gesture; see our list of kindness ideas.
- See the result. Giving where you can understand the impact is more satisfying. That is one reason effective giving and local volunteering both appeal.
- Don't give to get. The Zurich researchers flagged an open question: whether the effect lasts when you give mainly to feel happier. Give because it's good; enjoy the glow as a side effect.
Frequently asked questions
Is it scientifically proven that giving makes you happier?
There is solid evidence that giving tends to raise happiness a little. A 2018 meta-analysis found a small-to-medium effect, and large replications in 2020 confirmed an effect while showing its size depends on how studies are designed. "Proven to transform your mood" goes too far.
What is the "helper's high" or "warm glow"?
"Warm glow" is an economist's term for the good feeling that comes from choosing to give. A 2007 brain-imaging study found reward areas responded more to voluntary gifts than to forced, tax-like transfers to the same charity.
Does volunteering make you live longer?
Older adults who volunteer have lower mortality risk in observational studies — about 24% lower after adjusting for health and other factors in one meta-analysis. Because healthier people are more likely to volunteer, this shows an association, not proof that volunteering causes longer life.
Does the amount matter?
The well-known experiments used small sums, and the effect showed up anyway. What seems to matter more is that the giving is freely chosen and that you can see it helping someone.
Do kids feel the same thing?
A 2012 study found toddlers under two looked happier giving treats away than receiving them, especially when they gave up their own.
Sources
- Dunn, Aknin & Norton — Spending money on others promotes happiness, Science (2008), PubMed
- Aknin et al. — Prosocial spending and well-being: cross-cultural evidence for a psychological universal, JPSP (2013), PubMed
- American Psychological Association — press release on Aknin et al. (2013)
- Moll et al. — Human fronto-mesolimbic networks guide decisions about charitable donation, PNAS (2006)
- Harbaugh, Mayr & Burghart — Neural responses to taxation and voluntary giving, Science (2007), PubMed
- ScienceDaily — University of Oregon release on Harbaugh et al. (2007)
- Park et al. — A neural link between generosity and happiness, Nature Communications (2017)
- University of Zurich — Generosity makes you happy (2017)
- Aknin, Hamlin & Dunn — Giving leads to happiness in young children, PLOS One (2012), PubMed
- Aknin, Dunn, Proulx, Lok & Norton — Does spending money on others promote happiness? A registered replication report, JPSP (2020), PubMed
- Kim et al. — Prosocial spending encourages happiness: a replication of the only experiment in Dunn, Aknin & Norton (2008), PLOS One (2022)
- Curry et al. — Happy to help? A meta-analysis of performing acts of kindness on the well-being of the actor, JESP (2018)
- Okun, Yeung & Brown — Volunteering by older adults and risk of mortality: a meta-analysis, Psychology and Aging (2013), PubMed
- Greater Good Science Center — The Science of Generosity, white paper for the John Templeton Foundation (2018)