The amount you contribute to your FSA depends on what you actually spend on may be able to access medical expenses during the year, not on a fixed rule or recommendation

Your FSA contribution is entirely your choice. The IRS sets a maximum — currently $3,300 per year for individual coverage — but you can contribute anywhere from $0 up to that limit. The real question is not what you should put in, but what you will realistically spend on out-of-pocket medical costs that the FSA covers.

The catch is that FSA money follows a "use it or lose it" rule. Whatever you don't spend by the end of the plan year (or during a short grace period your employer may offer) goes back to your employer. You cannot carry the balance forward or get it refunded. This makes the calculation personal: you need to estimate your own medical spending, not follow a generic number.

Key Takeaways

  • Your FSA contribution limit is $3,300 per year for individual coverage, but you can contribute less or nothing at all.
  • Money you don't spend by the end of the plan year is forfeited, so you should only contribute what you expect to actually use.
  • may be able to access expenses include copays, coinsurance, deductibles, prescription drugs, and certain over-the-counter items — but not insurance premiums or general wellness.
  • If your life changes mid-year (marriage, birth, job loss), you can adjust your contribution during the open enrollment period or when ready after a may have access to event.
  • Keeping receipts and tracking spending throughout the year helps you stay within your contribution and avoid forfeiting money.

What counts as an may be able to access FSA expense

Before you decide how much to contribute, know what the FSA actually covers. may be able to access expenses include copays and coinsurance you pay at the doctor or pharmacy, deductibles, prescription medications, and certain over-the-counter items like pain relievers, allergy medicine, and antacids (you need a prescription or doctor's note for most OTC drugs). Dental work, vision care, and hearing aids also may have access to.

What does not count: health insurance premiums themselves, cosmetic procedures, vitamins (unless prescribed for a medical condition), gym memberships, and general wellness products. If you are unsure whether something qualifies, your FSA plan documents or your employer's benefits website will have a full list, or you can ask your plan administrator before you spend the money.

How to estimate your own spending

Look back at the past year or two. How much did you pay out of pocket for doctor visits, prescriptions, dental work, or vision care? Add up copays, deductibles you hit, and any other medical costs you paid directly. That number is a reasonable starting point for your contribution.

Then adjust for changes you know are coming. If you are planning elective surgery, dental work, or vision correction, add those costs. If you are switching to a plan with a lower deductible, you might spend less. If you have a chronic condition that requires regular prescriptions or visits, factor in the full year's worth. Be conservative — it is better to contribute less and not forfeit money than to overestimate and lose the difference.

If you have a spouse who also has an FSA through their employer, remember that you each have your own $3,300 limit. You cannot combine them or transfer money between accounts.

The use-it-or-lose-it rule and grace periods

At the end of your plan year, any money left in your FSA is forfeited. This is the single biggest reason to be careful about how much you contribute. Some employers offer a grace period — usually 2.5 months into the next plan year — during which you can still spend money from the previous year's account. Check your plan documents to see if your employer offers this.

A few employers also offer a carryover option, allowing you to roll up to $610 (this amount changes yearly) into the next plan year. This is rare, but if your employer offers it, you can be slightly more generous with your contribution knowing some unused money will not disappear.

If you are unsure whether your plan has a grace period or carryover, ask your benefits administrator or check your plan summary. This detail can change your contribution strategy.

Adjusting your contribution mid-year

You cannot change your FSA contribution whenever you want. Normally, you can only change it during your employer's open enrollment period, which is usually once a year. However, if you have a may have access to life event — marriage, divorce, birth or adoption of a child, loss of health coverage, or significant change in income — you can request a change within 30 to 60 days of the event (rules vary by employer).

If you realize mid-year that you contributed too much or too little, contact your benefits administrator to ask whether a change is possible. If you have already spent most of your contribution and the year is almost over, you may not be able to adjust. If you contributed too much and cannot spend it, some employers allow you to redirect unused funds to a dependent care FSA if you have one.

Common mistakes to avoid

The most common mistake is overestimating and forfeiting money. People often think "I might need this" and contribute the full $3,300, then only spend $1,500. The remaining $1,800 is gone. Start lower and increase next year if you find you are spending more than you expected.

Another mistake is forgetting to submit receipts and claims. Your FSA requires proof that expenses are may be able to access. Keep receipts, invoices, and explanation of benefits statements. If you use a debit card linked to your FSA, the card may process some purchases automatically, but you still need to keep documentation in case your plan administrator asks for it.

A third mistake is assuming your spouse's FSA or your dependent care FSA (if you have one) can cover the same expenses. They cannot. Each account has its own rules and may be able to access expense list. Do not mix them up.

Working with your employer's FSA plan

Your employer chooses which FSA plan to offer and sets some of the rules. Some employers offer a higher or lower maximum contribution limit (though $3,300 is the federal cap). Some offer a grace period or carryover; others do not. Some use a debit card for straightforward access; others require you to submit receipts and request reimbursement.

Before you decide how much to contribute, read your plan summary or contact your benefits administrator to understand your specific plan's rules. Ask about the grace period, carryover options, how to submit claims, and what happens if you have unused money at year-end. The details matter for your decision.

Frequently Asked Questions

What happens if I contribute $3,300 but only spend $2,000?

The remaining $1,300 is forfeited and goes back to your employer. You lose access to it. This is why it is important to estimate conservatively and only contribute what you reasonably expect to spend. If your plan offers a grace period, you have a few extra months to spend the money, but after that, it is gone.

Can I change my FSA contribution if I get married or have a baby?

Yes. Marriage, birth, and adoption are may have access to life events that allow you to change your FSA contribution within 30 to 60 days of the event. Contact your benefits administrator with proof of the event (marriage certificate, birth certificate, adoption papers) to request the change. Outside of these events or open enrollment, you cannot adjust your contribution.

Should I contribute to an FSA if I am healthy and rarely go to the doctor?

Only if you have predictable medical expenses. If you take prescription medications, wear glasses or contacts, or have regular dental work, an FSA can save you money even if you do not visit the doctor often. If you truly have no medical expenses, contributing $0 is the right choice. Do not contribute just because the option exists.

Can I use my FSA for my spouse or children?

Yes, if they are covered under your health insurance plan. Your FSA covers may be able to access expenses for you, your spouse, and any dependents listed on your plan. You do not need a separate FSA for each family member — one account covers everyone on your policy.

What if my employer does not offer an FSA?

Some employers do not offer an FSA, and that is legal. If yours does not, you may be able to open a Health Savings Account (HSA) if you are enrolled in a high-deductible health plan, or you can straightforward pay medical expenses out of pocket. Ask your benefits administrator what options are available to you.