What a Flex Card is and who can use it

A Flex Card (also called a Flexible Spending Account card or FSA card) is a debit card linked to money set aside before taxes for medical costs that Medicare does not cover. The money comes from your own paycheck if you still work, or from a retiree health plan if your former employer offers one. You load it once a year, use it throughout the year on may be able to access expenses, and any money left over at the end of the year is forfeited — you cannot carry it forward.

Not all seniors have access to a Flex Card. You need either an active employer health plan that offers an FSA, or a retiree health plan through a former employer. If you are retired and have only Medicare, you do not have a Flex Card option through Medicare itself. Some Medicare Advantage plans include a supplemental benefit card that works similarly, but that is a different product.

The card itself is issued by the plan administrator — the company that manages your employer or retiree health plan. You do not order it from Medicare or from the government.

Key Takeaways

  • A Flex Card is only available if your employer or former employer offers a health plan with a Flexible Spending Account; Medicare does not issue one.
  • You enroll during your employer's open enrollment period, usually in the fall, and the card arrives before the new plan year begins.
  • You can use the card only for costs that your health plan does not cover — copays, deductibles, dental, vision, hearing aids, and some over-the-counter items.
  • Money in the account does not roll over; you must spend it by December 31 or lose it, so estimate carefully when you choose your amount.
  • If you lose your job or retire, you may be able to keep your FSA under COBRA, though you will pay the full premium yourself.

Enrolling during open enrollment

The first step is to confirm that your employer or former employer plan actually offers an FSA. Ask your human resources department or benefits administrator directly — do not assume based on plan size or type. If the plan does offer one, they will send you enrollment materials during open enrollment, which is usually in October or November for coverage starting January 1.

When you receive the enrollment packet, you will see a form asking how much money you want to set aside for the year. The IRS sets a maximum amount each year; for 2024 it is $3,300, but this changes annually. You choose an amount based on your expected out-of-pocket medical costs. If you overestimate, you lose the unused balance. If you underestimate, you cannot add more money until the next open enrollment period.

Complete the enrollment form and return it by the important date your employer sets. Once enrolled, the plan administrator will issue your Flex Card, usually arriving in December or early January. Your employer will begin deducting your chosen amount from your paycheck in equal installments throughout the year.

What you can and cannot buy with the card

The card works only for may have access to medical expenses — costs that your health plan does not cover and that the IRS has approved. Common may be able to access expenses include copays and coinsurance, deductibles, dental work, vision exams and glasses, hearing aids, and prescription medications. Some over-the-counter items are may be able to access if you have a prescription or a letter from your doctor stating medical necessity.

You cannot use the card for health insurance premiums, cosmetic procedures, gym memberships, or most over-the-counter items without a prescription. If you swipe the card for an ineligible expense, the transaction may be denied at the point of sale, or you may be asked to reimburse the plan later.

Keep all receipts. The plan administrator may ask you to submit proof that an expense was may be able to access, especially for items that could be personal or medical. If you cannot provide a receipt, you may have to repay the amount from your own pocket.

How to use the card throughout the year

Once you have the card, you can use it at pharmacies, doctors' offices, dental clinics, vision centers, and medical supply stores that accept it. Swipe it like a debit card. The transaction is deducted from your FSA balance when ready.

Some providers do not accept FSA cards directly. In those cases, you pay out of pocket and then submit a claim to the plan administrator for reimbursement. You will need to include the receipt and an explanation of the expense. Reimbursement usually takes one to two weeks.

Check your balance regularly through the plan administrator's website or app. Many administrators offer online portals where you can view your balance, upload receipts, and track spending. Do not wait until November to see how much you have left — monitor it throughout the year so you can plan your remaining expenses.

What happens to unused money

Any balance remaining in your FSA on December 31 is forfeited. This is called the use-it-or-lose-it rule, and it applies to almost all FSAs. Some employers offer a grace period of up to 2.5 months into the next year, or a carryover of up to $610 (the amount changes yearly), but most do not. Check your plan documents to see if either applies to you.

If you know you will have unused money, you can spend it on may be able to access expenses before year-end — stock up on prescription refills, schedule dental work, or purchase over-the-counter items with a prescription. Some people use the money for vision exams or hearing aid batteries in December to avoid losing it.

Do not try to game the system by submitting false claims or asking providers to backdate receipts. The plan administrator audits claims and can require you to repay fraudulent reimbursements.

If you retire or change jobs

If you retire or leave your job before the plan year ends, you may lose access to your FSA when ready, depending on your employer's rules. Some employers allow you to continue using the card through the end of the year; others cut off access on your last day.

You may be able to continue your FSA under COBRA (the Consolidated Omnibus Budget Reconciliation Act), which allows you to keep your employer health plan for up to 18 months after you leave. However, you will pay the full premium yourself, including the employer's share, plus a 2 percent administrative fee. This is often expensive and may not be worth it for an FSA alone.

If you retire and enroll in Medicare, you cannot open a new FSA through Medicare. Your only option is to keep the FSA through COBRA if your former employer offers it, or to wait and see if your new employer offers one.

Comparing FSAs to Health Savings Accounts

If your employer offers a Health Savings Account (HSA) instead of or alongside an FSA, the two work differently. An HSA is available only if you are enrolled in a high-deductible health plan, and money rolls over year to year — you do not lose it. An HSA also earns interest and can be invested, making it a long-term savings tool. An FSA is simpler but more restrictive: money does not roll over, and it is meant for near-term expenses.

If you have the choice, an HSA is usually better for long-term planning, especially if you are still working and can contribute for several years. An FSA is better if you have predictable medical costs this year and want to use pre-tax dollars to pay for them now.

Some employers offer both. You can enroll in an HSA and an FSA at the same time, but there are limits on how much you can contribute to each, and the rules are complex. Ask your benefits administrator for guidance if you are considering both.

Frequently Asked Questions

Can I use my Flex Card after I turn 65 and enroll in Medicare?

Yes, if the card is still active through your employer or retiree health plan. Medicare does not take over your FSA. However, if you retire and lose your employer coverage, your FSA ends unless you continue it through COBRA. Once COBRA ends, you cannot renew the FSA.

What if I do not spend all my FSA money by the end of the year?

The unused balance is forfeited on December 31. Some plans offer a grace period of up to 2.5 months into the next year, or allow you to carry over up to $610, but most do not. Check your plan documents. If you have unused money, spend it on may be able to access expenses before the important date or plan to contribute less next year.

Can I change my FSA contribution amount during the year?

No, except during open enrollment or if you have a may have access to life event — marriage, divorce, birth of a child, loss of other health coverage, or significant change in medical costs. If you experience a may have access to event, contact your benefits administrator within 30 days to request a change.

Is the money in my FSA taxed?

No. FSA contributions are deducted from your paycheck before federal income tax, Social Security tax, and Medicare tax are calculated. This reduces your taxable income and saves you money on taxes. However, the money must be spent on may be able to access medical expenses, or it is forfeited.

What happens to my FSA if my employer goes out of business?

Your FSA is typically protected because it is held in a separate account by the plan administrator, not by the employer. However, you should contact the plan administrator when ready to confirm your balance and how to access your remaining funds. If the plan is terminated, you may have a limited window to spend the balance or request reimbursement.