New York (CNNMoney) - Among the questions about how Mitt Romney would pay for his $5 trillion tax plan is whether he would curb the biggest tax break of all: the largely invisible tax savings workers get when their employer provides health insurance.
The "health care exclusion" applies to the money a company contributes to help pay for an employee's coverage; that money is considered income to the worker, and the IRS treats it as tax-free.
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