Historically, donations to charities drop when tax rates go down. As a percentage of income, donations were highest when tax rates were highest.
The best example that low tax rates don't increase giving: in 2017 the TCJA reduced tax rates for most people, and increased the standard deduction (but reduced the charitable deduction). Even though they were being taxed less and had more money to donate, Americans donated several billion less to charities each year (estimates very, but they're all between $15 and $20 billion less each year).
The best example that low tax rates don't increase giving: in 2017 the TCJA reduced tax rates for most people, and increased the standard deduction (but reduced the charitable deduction). Even though they were being taxed less and had more money to donate, Americans donated several billion less to charities each year (estimates very, but they're all between $15 and $20 billion less each year).