Family Coverage Act This bill amends the Internal Revenue Code to modify the requirements for determining the affordability of employer-sponsored minimum essential health coverage that is required under the Patient Protection and Affordable Care Act (PPACA). (Under current law, the coverage is unaffordable, and an employee may be eligible for premium assistance tax credits, if the employee's required contribution for an individual plan exceeds 9.5% of household income, adjusted for inflation after 2014.) The bill specifies that, with respect to an employee's family members who are eligible to enroll in the plan, affordability must be determined using the cost of family coverage rather than individual coverage to expand the eligibility of families for premium assistance tax credits. This bill also expresses the sense of Congress that the Departments of Health and Human Service and the Treasury have the administrative authority, within their respective jurisdictions, to apply the affordability provision of PPACA so as to expand access to affordable health insurance coverage for working families without further legislation.