Thousands of undocumented workers pay Maryland state taxes - Baltimore Sun
In 2001, then-Federal Reserve Chairman Alan Greenspan estimated that undocumented immigrants paid about $70 billion annually in taxes and received about $43 billion in government services — a net benefit to American taxpayers that smashed one of the common nativist myths.
In 2005, The New York Times reported that undocumented workers contributed about $7 billion to the Social Security Administration. While ITINs are available, so are many phony Social Security numbers. With them, undocumented workers pay billions into the SSA and Medicare systems, though the many workers who leave, either of their own will or through deportation, never will collect retirement or health benefits.
By 2007, the Social Security trust fund had received a net benefit of upwards of $240 billion from "unauthorized immigrants." Two years ago, Stephen Goss, chief actuary of the SSA, told The Washington Post: "If we had not had other-than-legal immigrants in the country over the past, then these numbers suggest that we would have entered persistent shortfall of tax revenue to cover [payouts] starting [in] 2009."