Important: This tool is for informational purposes only and is intended to help you understand what your potential health insurance costs and tax credits may be under the Affordable Care Act when enrolling in a health plan through a state Marketplace. Costs and plans may vary by state. Costs may also vary based on the specific health plan you choose. Insurance premium and tax credit amounts are estimates and are based on the information you enter compared to guidelines issued by the U.S. Government Accountability Office. WebMD does not provide medical advice, diagnosis, or treatment. We do not recommend or endorse any specific insurance plan or health care provider.