A Health Savings Account (HSA) lets you set aside pre-tax and tax-exempt money to pay for qualified medical expenses. Like a savings account, it stays there until you use it – and many even earn interest, like an investment account. Your HSA also doesn’t expire, so no deadlines. Instead, your funds roll over. And since it’s not tied to your employer, you can carry HSA funds from job to job — even after you change health insurance plans or retire.