Mass transit benefits can be rolled over, but not refunded

Mass transit benefits are part of a suite of benefits falling into the category of tax-favored qualified transportation fringe benefits. Unused QTF benefits never expire, even benefits employees paid for on a pretax basis in prior calendar years. Instead, employees can keep rolling over unused benefits until they’re used up. This is important, since the IRS has concluded that unused QTF benefits can’t be refunded to an employee.