Before the passage of the tax bill, 64% of seniors didn’t pay taxes on their Social Security benefits, according to a June report from President Donald Trump’s Council of Economic Advisers. Under the new legislation, 88% won’t pay taxes on those benefits, the report estimated.

A provision in Trump's tax and budget law gives seniors 65 and older a new deduction that offsets Social Security taxes for most retirees. While it helps many keep more money, it also accelerates the program's insolvency.

The Social Security Administration reportedly sent out an email claiming the policy bill “eliminates federal income taxes on Social Security benefits for most beneficiaries”—but that’s not true.