Healthcare FSA — Pay Medical Expenses With Pre-Tax Dollars and Use the Grace Period or Rollover

What Is It?

A Healthcare Flexible Spending Account (FSA) is an employer-sponsored benefit that lets you set aside pre-tax dollars from your paycheck to pay for qualified medical, dental, and vision expenses. Every dollar you contribute reduces your taxable income — saving federal income tax, state income tax (in most states), and FICA taxes (7.65%).

For someone in the 22% federal bracket, contributing $2,000 to an FSA saves approximately $600 in federal income tax plus $153 in FICA — a total of ~$753 in tax savings on $2,000 of spending you were going to do anyway.

The 2024 contribution limit is $3,200 per employee per plan year. If your spouse also has access to an FSA through their employer, they can contribute an additional $3,200 — for up to $6,400 per household.

Do I Qualify?

• Your employer offers a Healthcare FSA
• You expect enough eligible medical, dental, or vision expenses to use the contribution
• You are not relying on HSA rules that would make a full Healthcare FSA a bad fit
• You can estimate costs carefully enough to avoid forfeiting money at year-end

What Qualifies as an Eligible Expense

A broad range of out-of-pocket healthcare costs qualify under IRS Publication 502:

• Deductibles, copays, and coinsurance for medical, dental, and vision plans
• Prescription medications
• Over-the-counter medications and menstrual care products (no prescription required since 2020)
• Dental care: cleanings, fillings, crowns, orthodontia
• Vision care: glasses, contact lenses, eye exams, LASIK surgery
• Mental health therapy copays
• Acupuncture and chiropractic care
• Hearing aids and batteries
• Medical equipment: blood pressure monitors, glucose meters, crutches
• Sunscreen (SPF 15+) and first-aid supplies
• Eligible expenses for spouse and tax dependents, even if they are on a different health insurance plan

What does not qualify:

• Cosmetic procedures (teeth whitening, elective surgery)
• Gym memberships or fitness equipment (unless prescribed for a specific medical condition)
• Vitamins and supplements (unless prescribed)
• Insurance premiums

The “Use It or Lose It” Rule — and Its Two Exceptions

FSA funds generally must be used for expenses incurred during the plan year — unused balances are forfeited. However, employers can offer one of two grace period options (not both):

Option 1 — Grace period: Up to 2.5 additional months after the plan year ends (e.g., until March 15 for a calendar-year plan) to incur new expenses using prior-year funds.

Option 2 — Rollover: Up to $640 (2024 limit, indexed annually) of unused funds can roll over to the next plan year with no deadline.

Check your employer’s Summary Plan Description (SPD) to see which option applies — or ask HR directly. Many employees forfeit funds unnecessarily because they don’t know their plan has a grace period or rollover.

The Day-One Availability Rule: A Hidden Benefit

Unlike an HSA where you can only spend what you’ve contributed, a Healthcare FSA makes your entire annual election available on day one of the plan year. If you elect $2,400 for the year and have a $2,400 dental bill in January — before you’ve contributed anything — you can use FSA funds to pay it in full immediately.

If you then leave your employer mid-year, you keep the benefit from the expenses already reimbursed even if you haven’t contributed enough to cover them. Employers cannot recover the advance.

FSA vs. HSA: Which Is Better?

If you have access to both: An HSA-eligible HDHP paired with a “limited purpose” FSA (covers only dental and vision, preserving HSA eligibility) is the optimal strategy — you get both accounts simultaneously.

What Most People Don’t Know

• The tax savings include FICA, not just income tax. Most comparisons show only income tax savings. But FSA contributions also avoid the 7.65% Social Security and Medicare tax (FICA). For a $3,200 contribution, FICA savings alone are $245 — real money.
• Stock up before year-end if you have leftover funds. Eligible over-the-counter items (cold medicine, antacids, first-aid supplies, pain relievers, sunscreen, contact solution) qualify. Visit a pharmacy in late December with your FSA card.
• You can request reimbursement for current-year expenses in future years. As long as the expense was incurred during the plan year, you can submit it for reimbursement at any point — even years later, if your plan allows. Keep all receipts and EOBs (explanations of benefits).
• FSA debit cards may require documentation. When you swipe your FSA card, the transaction may be flagged for substantiation — you’ll need to provide a receipt or EOB showing the expense was eligible. Keep records to avoid the card being suspended.
• Dependent care FSA (DCFSA) is separate. A Healthcare FSA covers medical expenses; a Dependent Care FSA covers childcare/eldercare. These are different accounts with different rules — see the Dependent Care FSA loophole for details on the DCFSA.

Legal Basis

• 26 U.S.C. § 125 — Cafeteria plans (the statutory basis for FSAs)
• 26 U.S.C. § 106 — Exclusion from gross income for employer-provided health coverage
• IRS Publication 969 — Health Savings Accounts and Other Tax-Favored Health Plans
• IRS Publication 502 — Medical and Dental Expenses (what qualifies)
• IRS Notice 2005-86 — Guidance on FSA grace periods
• IRS Notice 2020-29 / Rev. Proc. 2020-45 — Increased rollover amounts and flexibility

Frequently Asked Questions

Sources

• IRS — Flexible Spending Arrangements (FSAs)
• IRS Publication 502 — Medical and Dental Expenses
• IRS — FSA Contribution Limits
• 26 U.S.C. § 125 — Cornell Law School LII