Grading the Giving

Forbes based our scores on giving as a percentage of net worth. To do so, we added the value of lifetime “out the door” donations to the current Forbes 400 list net worth and then divided lifetime giving by that amount. Here are the percentage ranges for each score:

♥ = gave away less than 1% of fortune

♥♥ = gave away 1% to 4.99%

♥♥♥ = gave away 5% to 9.99%

♥♥♥♥ = gave away 10% to 19.99%

♥♥♥♥♥ = gave away 20% or more