There are diminishing returns to money buying happiness, but it looks like they set in after pretty high incomes (starting at $95,000, and even higher if you live in a wealthy area).
So donating more on the margin when your total income is less than $95,000 USD seems to trade off directly against your happiness.
One can probably realize a lot of the egotistic benefit of donating by giving small amounts, e.g. $30 /β month to GiveDirectly.
There are diminishing returns to money buying happiness, but it looks like they set in after pretty high incomes (starting at $95,000, and even higher if you live in a wealthy area).
So donating more on the margin when your total income is less than $95,000 USD seems to trade off directly against your happiness.
One can probably realize a lot of the egotistic benefit of donating by giving small amounts, e.g. $30 /β month to GiveDirectly.