Q: Is there any evidence that changes to the tax laws in the USA changed end of year giving behaviors? Previously, ~30% of US taxpayers filed itemized tax returns allowing them to receive a deduction for charitable giving. Tax law changed in 2017 so that now only ~10% itemize. This should mean tax year-end giving should not matter to millions of people for whom it used to matter. Is there any data evidence to support this?

February 24, 2022      Kiki Koutmeridou, Chief Behavioral Scientist, DonorVoice

I’m not an expert in this but a quick search surfaced this article on the effect of tax reforms on 2019’s charitable giving. The researchers didn’t find a reduction. Actually, they observed an “increase in charitable contributions in 2019, even with the lower tax rates and the dramatically smaller number of taxpayers who itemize their deductions”. I didn’t find a similar analysis for 2020.

As a behavioural scientist, I’ll add that not everyone reacts to the tax rebates or reforms the same way, nor the effect is the same across all orgs. A few examples:

  • people  with different personality traits might react differently e.g. these changes might affect people who skew towards conscientiousness (and their giving) more than people who skew towards agreeableness.
  • Differences may be observed between high and low income people. This paper found that high-income individuals respond more on the intensive margin, while the extensive-margin response is stronger among low-income taxpayers.
  • Tax cuts might affect charitable orgs of different sub-sectors differently. This paper talks about a decrease in giving towards specific causes e.g. health care but not others.

Once again, the answer is never simple, nor the same for everyone.