A limited purpose flexible spending account is a type of FSA that only covers dental, vision, and preventive care expenses—not medical ones—and is designed to work alongside a high-deductible health plan

A limited purpose FSA (also called a LPFSA) lets you set aside pre-tax money for specific health costs, but with a narrower scope than a standard FSA. The trade-off is that you can use one while enrolled in a high-deductible health plan (HDHP) without losing the ability to contribute to a health savings account (HSA) at the same time. If you have an HDHP and want to save on taxes for dental work, glasses, or contact lenses, this account type exists specifically for that situation.

The money you contribute comes directly from your paycheck before taxes are taken out, which reduces your taxable income for the year. You can spend that money only on the expenses your plan allows—typically dental care, vision care, and preventive services. Any money you don't spend by the end of the plan year is forfeited under the "use-it-or-lose-it" rule, though some plans offer a grace period or carryover of up to $610 (the amount varies by year).

Key Takeaways

  • A limited purpose FSA covers dental, vision, and preventive care only—not general medical expenses like doctor visits or prescriptions for non-preventive drugs.
  • You can contribute to both an LPFSA and an HSA in the same year, which is not possible with a standard FSA.
  • Money you contribute is pre-tax, which lowers your taxable income and reduces what you owe in federal income tax.
  • Unused funds are forfeited at the end of the plan year unless your employer offers a grace period or carryover option.
  • Your employer sets the contribution limit each year, but the IRS caps it at $3,300 for 2024 (the limit changes annually).

What expenses a limited purpose FSA actually covers

The IRS maintains a specific list of what counts as a covered expense in an LPFSA. Dental care includes cleanings, fillings, root canals, crowns, orthodontia, and dentures. Vision care covers eye exams, glasses, contact lenses, and lens solutions. Preventive care includes routine physicals, vaccinations, cancer screenings, and cholesterol tests—the services your insurance covers at no cost under the Affordable Care Act.

What does not count: general medical expenses. You cannot use an LPFSA to pay for a doctor's visit for an illness, urgent care, emergency room visits, or prescription medications unless they are preventive (like birth control or blood pressure medication taken to prevent disease). You also cannot use it for cosmetic procedures, over-the-counter medications, or health insurance premiums. If you need to cover those costs, you would use your HSA instead, or pay out of pocket.

The distinction matters because it determines whether you should contribute more to an LPFSA or an HSA in a given year. If you know you need dental work or new glasses, the LPFSA is the right place for that money. If you expect general medical costs, the HSA is more flexible.

How a limited purpose FSA works with an HSA

The main reason an LPFSA exists is to let you use both accounts at the same time. A standard FSA blocks you from contributing to an HSA in the same year—the IRS treats them as competing accounts. But an LPFSA is narrow enough that the IRS allows it to coexist with an HSA, because the LPFSA covers only dental and vision, leaving the HSA to cover medical expenses.

This matters because an HSA is more powerful than an FSA: the money rolls over year to year instead of being forfeited, you can invest it, and you can withdraw it for any reason after age 65 (though non-medical withdrawals are taxed). An LPFSA is more limited but lets you save on taxes for dental and vision costs without giving up the HSA's flexibility.

The strategy is to contribute to both: put money in the LPFSA for dental and vision costs you know are coming, and put money in the HSA for everything else. This maximizes your tax savings across both accounts. If you are unsure how much to contribute to each, your employer's benefits team can walk you through the numbers.

The use-it-or-lose-it rule and what happens to leftover money

Money in an LPFSA that you do not spend by the end of the plan year is forfeited. This is the biggest drawback of the account type. If you contribute $2,500 and spend only $1,800, the remaining $700 is gone—you cannot roll it over to the next year or withdraw it.

Some employers offer a grace period (usually two and a half months into the next plan year) during which you can still spend the previous year's money. Others offer a carryover, allowing you to roll up to $610 of unused funds into the next year. Check your plan documents or ask your benefits administrator which option your employer provides. If neither is available, you need to estimate conservatively: contribute only what you are confident you will spend.

To avoid forfeiting money, track your spending throughout the year. Most FSA providers offer a debit card or online portal where you can see your balance and submit receipts. If you are approaching the end of the year and have unspent money, you can schedule dental cleanings, eye exams, or other covered services before December 31 to use the funds.

Contribution limits and how much you can set aside

Your employer sets the contribution limit for your LPFSA, but the IRS caps it. For 2024, the maximum is $3,300 per year. This limit applies to the LPFSA alone; it does not count against your HSA contribution limit. The IRS adjusts this cap annually for inflation, so the amount may change each year.

You choose your contribution amount during your employer's open enrollment period, usually once a year. The money is deducted from your paycheck in equal installments throughout the plan year. If your circumstances change—you have a child, lose coverage, or have a significant change in expenses—you may be able to adjust your contribution mid-year, but only if your employer's plan allows it and the change qualifies under IRS rules.

If you contribute more than you spend, you lose the excess. If you contribute less than you need, you pay the remaining costs out of pocket. There is no penalty for either scenario, but the tax savings disappear on money you do not use.

Who should consider a limited purpose FSA

An LPFSA makes sense if you are enrolled in an HDHP and want to save on taxes for dental or vision costs. If you have an HMO or PPO plan instead, a standard FSA is usually better because it covers more expenses and you do not need to choose between it and an HSA.

You should also have a realistic sense of your dental and vision costs for the coming year. If you know you need a crown, new glasses, and braces, the LPFSA is a good fit. If your dental and vision costs are minimal and unpredictable, contributing a small amount or skipping the LPFSA altogether may be safer than risking forfeiture.

An LPFSA is also useful if you want to maximize your HSA contributions for long-term savings while still getting tax relief for predictable dental and vision expenses. By splitting your pre-tax savings between both accounts, you cover when ready costs with the LPFSA and build a medical reserve in the HSA.

How to enroll and what documents you need

You enroll in an LPFSA during your employer's open enrollment period, which usually happens once a year in the fall or winter. You choose your contribution amount and confirm which covered expenses you expect to incur. Some employers require you to submit a benefits election form; others use an online portal.

You do not need to submit documentation to enroll—just your election form. However, when you submit a claim for reimbursement, you will need to provide proof of the expense: an itemized receipt from your dentist or eye doctor, a prescription from your doctor, or an invoice showing what you paid. Keep these documents for at least three years in case your employer or the IRS audits your account.

If you change jobs or lose coverage, your LPFSA ends and any unused balance is forfeited. You cannot transfer it to a new employer's plan. This is another reason to estimate conservatively and avoid over-contributing.

Frequently Asked Questions

Can I use my limited purpose FSA for over-the-counter medications?

No, not unless they are preventive. Over-the-counter pain relievers, cold medicines, and allergy medications are not covered. However, some preventive over-the-counter items—like certain blood pressure monitors or glucose meters—may be covered if they are prescribed by a doctor. Check your plan documents or ask your provider before purchasing.

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

The unused balance is forfeited unless your employer offers a grace period or carryover. A grace period lets you spend the previous year's money for two and a half months into the new year. A carryover lets you roll up to $610 into the next year. If your plan has neither, the money is lost.

Can I have both a limited purpose FSA and an HSA at the same time?

Yes, that is the main advantage of an LPFSA. You cannot have a standard FSA and an HSA in the same year, but an LPFSA is narrow enough that the IRS allows both. This lets you save on taxes for dental and vision with the LPFSA while building long-term medical savings in the HSA.

How do I know if my employer offers a limited purpose FSA?

Check your benefits guide or ask your human resources or benefits department. Not all employers offer an LPFSA; it is most common among companies that also offer HDHPs and HSAs. If your employer does not offer one, you can still contribute to an HSA and pay dental and vision costs out of pocket or with after-tax dollars.

Can I change my limited purpose FSA contribution mid-year?

Only if you have a may have access to life event—marriage, divorce, birth of a child, loss of coverage, or a significant change in your employer's plan. You cannot change your contribution just because you want to. If you do have a may have access to event, contact your benefits administrator within 30 to 60 days to request a change.