HSAs are a tax-friendly way for workers to pay medical bills today and well into retirement. Getty Images By the editors of Kiplinger's Personal Finance From Kiplinger's Personal Finance, December 2017 If your employer offers a health savings account, that’s usually your best bet. Your contributions will escape federal as well as Social Security taxes when made through payroll deduction. If you have health insurance on your own or your employer doesn’t offer an HSA, consider HealthEquity, which lets you choose among 17 low-cost Vanguard mutual funds and six Vanguard target-date funds for long-term investing. HealthEquity also offers an FDIC-insured savings account for short-term savings. SEE ALSO: Health Savings Account vs. Flexible Spending Account: Which Is Better for You? Kiplinger's Best List, 2017 Best FAANG-less Stocks 3 Best International Mutual Funds to Play the Global Economic Recovery Best Ways to Make the Most of Rising Interest Rates Best Ways to Get Free Trades at Online Brokers Best Vales in Tech Best Health Savings Account Best Phone Plans for Every Type of User Best Benefits of Amazon Prime Best Ways for Investors to Play Defense Best Rewards Credit Cards The Best Bank for You Best Tax Software for You Best College Majors for Your Career Best College Savings Plan It’s like a supercharged flexible spending account that never expires, and it can even serve as an extra retirement-savings fund. Most employers also add a few hundred dollars to the accounts each year as a bonus. Unlike flexible-spending accounts, you don’t have to spend the money in an HSA by the end of the year. You can use the money tax-free for medical expenses anytime, even after retirement. In fact, you’ll get a bigger benefit from an HSA if you can use other cash to pay for current out-of-pocket medical bills and leave the money growing in the account for the long term.