A Health Savings Account (HSA) is a tax-avantaged medical savings account available to taxpayers in the United States who are enrolled in a High Deductible Health Plan (HDHP). The funds contributed to the account are not subject to federal income tax at the time of deposit. Funds may be used to pay for qualified medical expenses at any time without federal tax liability. Withdrawals for non-medical expenses are treated very similarly to those in an IRA account in that they may provide tax advantages if taken after retirement age, and they incur penalties if taken earlier. These accounts are a component of consumer driven health care.