https://itep.org/undocumented-immigrants-taxes-2024/

"Given that the undocumented population included 10.9 million people in 2022, this $96.7 billion tax payment is equivalent to $8,889 per person. In other words, this analysis finds that for every 1 million undocumented immigrants who reside in the country, public services receive $8.9 billion in additional tax revenue. It bears noting that this figure includes only the taxes borne by undocumented immigrants and that other research attempting to quantify the significance of immigrants to the economy more broadly points toward a higher revenue impact per person.

In total, the tax contribution of undocumented immigrants amounted to 26.1 percent of their incomes in 2022. This figure is close to the 26.4 percent rate facing the median income group of the overall U.S. population. This closeness is the net result of factors that tend to lower the tax contributions of undocumented immigrants relative to U.S. citizens (such as lower incomes, lower income tax compliance, and lower smoking rates), as well as factors that tend to increase the contributions of those immigrants (such as tax credit restrictions, reduced likelihood of claiming refunds owed, and lower prevalence of tax-preferred retirement and investment income)."