Flexible Spending Account (FSA) Guide (2026): Rules & Expenses

2026 flexible spending account limits and rollover rules

For 2026, the IRS limit for healthcare FSA contributions is $3,400 per employee, up from $3,300 in 2025. If your plan offers a carryover, up to $680 of unused 2026 funds can roll into 2027. Plans can instead offer a grace period of up to 2.5 months, but not both.

2026 flexible spending account maximums

The healthcare limit is per employee, so spouses who each have an FSA through their own employers can each contribute up to $3,400. Your employer can set a lower limit.

The use-it-or-lose-it rule

Money left in your FSA at the end of the plan year, after any carryover or grace period, is forfeited to your employer. Ways to avoid losing money:

•         Elect conservatively, based on expenses you’re sure of.
•         Check your balance a few months before the plan year ends.
•         Schedule care you’ve been putting off, such as an eye exam, new glasses, or dental work.
•         Stock up on eligible supplies like first-aid items, contact lens solution, or OTC medicines.
•         Know your run-out deadline for submitting last year’s claims.

Flexible spending account rollover vs. grace period

Your plan may offer one, the other, or neither, so check your plan documents.

2026 FSA tax savings breakdown

Illustrative savings for a single filer, using 2026 federal brackets and 7.65% FICA:

Note: These are estimates. Actual savings depend on your total income, filing status, state, and whether your earnings exceed the Social Security wage base.

What is covered under a flexible spending account?

FSA eligible expenses are qualified medical expenses as defined by the IRS in Publication 502: costs to diagnose, treat, or prevent disease, plus dental and vision care. Since the CARES Act, over-the-counter medicines and menstrual care products qualify without a prescription. Cosmetic procedures and general wellness purchases usually don’t qualify.

Medical care, prescriptions, and equipment

•         Doctor visit copays, coinsurance, and deductibles
•         Prescription drugs
•         Lab tests, X-rays, and diagnostic services
•         Mental health therapy and counseling
•         Physical therapy and chiropractic care
•         Medical equipment and diagnostic devices, such as blood pressure monitors, glucose meters, and thermometers
•         Hearing aids and batteries

Vision and dental expenses

•         Eye exams, prescription eyeglasses, and contact lenses
•         Contact lens solution
•         LASIK and other corrective eye surgery
•         Dental cleanings, fillings, crowns, root canals, and dentures
•         Orthodontia, including braces and clear aligners

Over-the-counter and allowable purchases

The CARES Act made OTC medicines and menstrual care products reimbursable without a prescription for amounts paid after December 31, 2019. Common allowable purchases include:

•         Pain relievers, allergy medicine, cold and flu medicine, and antacids
•         Tampons, pads, liners, menstrual cups, and similar products
•         First-aid supplies, bandages, and heating pads
•         Broad-spectrum sunscreen (SPF 15+), which many plan administrators treat as eligible

Eligible vs. non-eligible expenses

Note: Some items, like massage or weight-loss programs, are eligible only with a letter of medical necessity from your doctor. Check with your plan administrator before buying.

To learn how health and life coverage work together, see M Life Insurance’s health insurance page.

FSA vs. HSA: which is better?

An HSA is usually the better long-term account if you qualify, because you own it, the money rolls over forever, and it can be invested. But you need a high-deductible health plan (HDHP) to open one. An FSA works with almost any employer health plan and is best for predictable yearly expenses.

Key differences

•         Ownership: An FSA is tied to your employer; an HSA belongs to you and goes with you when you change jobs.
•         Eligibility: An HSA requires coverage under an HDHP (for 2026, a minimum deductible of $1,700 self-only or $3,400 family). An FSA has no such requirement.
•         Rollover: HSA balances roll over indefinitely; FSA funds are mostly use-it-or-lose-it.
•         Investing: HSA funds can be invested, with tax-free growth and tax-free withdrawals for qualified expenses (a triple tax advantage). FSAs can’t be invested.
•         Using both: If you have a general-purpose FSA, you generally can’t contribute to an HSA. A limited-purpose FSA (dental and vision only) can be paired with an HSA.

Healthcare FSA vs. HSA head-to-head

When to choose an FSA over an HSA

•         Your employer’s plans aren’t HSA-eligible (you have a PPO, HMO, or low-deductible plan).
•         You have predictable costs, like regular prescriptions, braces, or planned surgery.
•         You need a large amount early in the year and want the uniform coverage rule.
•         You have an HSA but want a limited-purpose FSA for extra dental and vision savings.

Is a flexible spending account worth it?

For most people with predictable healthcare costs, yes. An FSA cuts the effective cost of those expenses by roughly 20%–35% depending on your tax bracket and state. The main risk is electing more than you spend and losing the difference, so it’s worth it when you elect carefully.

Flexible spending account benefits

•         Immediate tax savings on every dollar spent, from federal income tax, FICA, and usually state tax
•         Full annual amount available on day one under the uniform coverage rule
•         Works with almost any employer health plan, unlike an HSA
•         Convenient FSA debit card for pharmacies, doctors, and eligible retail purchases

The downsides

•         Forfeiture risk: Money not used by the deadline is lost, beyond any carryover or grace period.
•         Job changes: You usually lose access to unspent funds when you leave, unless you elect COBRA for the FSA.
•         Paperwork: You must keep itemized receipts and EOBs and may need to submit them.
•         Locked-in election: You generally can’t change your amount mid-year without a qualifying life event, such as marriage or the birth of a child.

Step-by-step election plan for open enrollment

1.       Review last year’s costs. Add up copays, prescriptions, dental, vision, and OTC spending from your insurer statements and receipts.
2.       Add known upcoming expenses, like braces, a planned procedure, new glasses, or a new baby.
3.       Subtract uncertain costs. Leave out expenses you aren’t sure will happen.
4.       Check your plan’s carryover or grace period to see how much cushion you have.
5.       Elect up to that total, within the 2026 limit of $3,400.

Example: If you expect $900 in prescriptions, $400 in copays, a $600 pair of glasses, and $250 in OTC items, a $2,150 election covers known costs. In the 22% federal bracket with no state tax, that saves about $637.

Pre-tax health accounts protect your budget this year; life insurance protects your family’s long-term finances. See M Life Insurance’s life insurance calculator to estimate how much coverage your family would need.

Conclusion:

A flexible spending account is one of the easiest tax breaks available to employees. In 2026, you can set aside up to $3,400 before taxes, use it from day one, and potentially carry $680 into next year. The key is to elect based on expenses you’re confident you’ll have.

Explore comprehensive protection with M Life Insurance

Tax-advantaged health accounts are one part of a family’s financial plan. M Life Insurance helps individuals and families across the United States round out their workplace benefits with term life insurance and whole life insurance, so a loss of income doesn’t undo the savings you’ve built.

Consult with M Life Insurance through the quotes page or call (800) 661-8136.