If you're not taking full advantage of a Flexible Spending Account (FSA) or Health Savings Account (HSA), you're essentially leaving free money on the table. These tax-advantaged accounts can save you hundreds — sometimes thousands — of dollars every year, and yet many people either don't use them at all or barely scratch the surface of their potential. Let's break down exactly how to make these accounts work harder for you.
Before you can maximize your savings, you need to know what you're working with. An FSA is offered through your employer and lets you set aside pre-tax dollars to pay for eligible medical expenses. The catch? Most FSAs have a "use it or lose it" rule, meaning unspent funds may not roll over at the end of the year (though some plans allow a rollover of up to $610 in 2024, or a grace period of up to 2.5 months).
An HSA, on the other hand, is available only if you're enrolled in a High Deductible Health Plan (HDHP). The big advantages here are triple tax benefits: contributions go in pre-tax, grow tax-free, and can be withdrawn tax-free for qualified medical expenses. Plus, unused funds roll over indefinitely — making HSAs one of the most powerful savings tools available to anyone, not just for healthcare.
For 2024, the FSA contribution limit is $3,200 per person, while HSA limits are $4,150 for individuals and $8,300 for families (with an additional $1,000 catch-up contribution if you're 55 or older).
1. Front-load your FSA strategically. Unlike HSAs, FSAs are pre-funded by your employer at the start of the plan year. That means you can elect to contribute $3,200 and immediately use the full amount — even before your payroll deductions have covered it. If you know you have big dental work, glasses, or a planned procedure coming up, take advantage of this.
2. Know what's eligible — the list is longer than you think. Sunscreen with SPF 15 or higher, menstrual products, acupuncture, contact lenses, and even some over-the-counter medications all qualify. Apps like Truemed or your FSA provider's online store can help you identify eligible items you're already buying anyway.
3. Set a calendar reminder in October. Check your FSA balance before November hits. Give yourself time to spend any remaining funds on eligible items before the deadline. Stock up on contacts, schedule that overdue eye exam, or grab a year's worth of eligible OTC products.
4. Use your FSA for dependent care too. A Dependent Care FSA lets you set aside up to $5,000 per household to cover daycare, after-school programs, or elder care costs. This is entirely separate from your medical FSA, so you may be able to contribute to both simultaneously — a massive tax savings opportunity for working parents.
This is where things get really exciting. Most people treat their HSA like a checking account — money goes in, money goes out for doctor visits. But the smartest move is to treat your HSA like a secondary retirement account.
5. Invest your HSA funds. Many HSA providers — including Fidelity, Lively, and HealthEquity — allow you to invest your balance in mutual funds or ETFs once you hit a minimum threshold (often $1,000). Because your money grows tax-free, even modest contributions can compound significantly over time. A 30-year-old who contributes $4,150 annually and earns a 7% average return could have over $430,000 in their HSA by age 65 — all available tax-free for medical expenses.
6. Pay medical bills out-of-pocket now, reimburse yourself later. Here's a lesser-known strategy: there's no time limit on HSA reimbursements. Save every receipt for qualified medical expenses you pay out of pocket today. Then, decades from now, you can reimburse yourself for those expenses — tax-free — letting your money compound in the meantime. Keep a dedicated folder (digital or physical) for all your medical receipts.
7. After age 65, your HSA becomes a traditional IRA. Once you turn 65, you can withdraw HSA funds for any reason without penalty — you'll just pay ordinary income tax, the same as a traditional IRA. This makes maxing out your HSA every year a no-brainer if you're eligible.
Let's put some real numbers on this. If you're in the 22% federal tax bracket and max out both an FSA ($3,200) and an HSA ($4,150), you're sheltering $7,350 from federal taxes — saving you roughly $1,617 in taxes alone, not counting state income tax savings or payroll tax reductions on FSA contributions.
That's not theoretical money. That's real cash staying in your pocket instead of going to the IRS.
The key is to start now, even if you can't contribute the maximum right away. Increase your contributions incrementally, learn what expenses qualify, and build good habits around tracking and saving receipts. Your future self — especially your future retired self — will be genuinely grateful you did.