This tool was developed by the Kaiser Family Foundation to illustrate health insurance premiums and subsidies for people purchasing insurance on their own in new health insurance exchanges (or "Marketplaces") created by the Affordable Care Act (ACA). You can enter different incomes, ages, and family sizes to get an estimate of your eligibility for subsidies and how much you could spend on health insurance. For more information on methodology and to read answers to frequently asked questions, click here.