The FSA Guide: How to Save Money on Healthcare and Childcare With Pre-Tax Dollars

What Is an FSA and Why Does It Matter?

A Flexible Spending Account (FSA) is a benefit offered by many employers that lets you set aside pre-tax money to pay for healthcare or childcare expenses. "Pre-tax" means you never pay federal income tax, state income tax, or payroll taxes on money that goes into an FSA — which effectively gives you a 20-35% discount on everything you buy with it.

If you're in the 22% tax bracket and contribute $2,000 to a healthcare FSA, you've saved $440 in federal taxes alone — plus state taxes and the 7.65% FICA taxes you don't pay on those contributions. Your effective savings could be 30-35% on every dollar you put in.

Despite being free money, FSAs are consistently underused — many employees don't enroll, don't spend their balance, or lose money at year-end because they didn't understand the rules. This guide will make sure you're not one of them.

Types of FSAs

Healthcare FSA (The Most Common)

For medical, dental, and vision expenses. In 2026, you can contribute up to $3,300 per year. Your employer may also contribute to your FSA (though this is less common than with HSAs).

Key feature: The entire year's contribution is available on January 1, even if you haven't contributed all of it yet. If you elect to contribute $2,400 for the year ($200/month) and you need a $1,500 dental procedure in February, you can use the full $1,500 from your FSA — your employer fronts the rest and you pay it back through payroll deductions throughout the year.

Dependent Care FSA (DCFSA)

For childcare and eldercare expenses. In 2026, you can contribute up to $5,000 per year (or $2,500 if married filing separately). This covers daycare, preschool, after-school care, and elder care for a dependent who can't care for themselves.

Important difference from healthcare FSA: The full amount is NOT available on January 1. You can only spend what you've contributed so far. If you've had $500 deducted by February and you owe $800 in childcare, you can only use $500 from the FSA.

Limited Purpose FSA

A special type of healthcare FSA for people who have an HSA (which requires a High-Deductible Health Plan). A limited purpose FSA can only be used for dental and vision expenses — it preserves your ability to contribute to an HSA while still getting FSA tax benefits on predictable dental and vision costs.

What Does a Healthcare FSA Cover?

The list is broader than most people realize:

Medical Expenses

• Doctor visit copays and deductibles
• Prescription medications
• Lab tests and bloodwork
• Physical therapy
• Mental health therapy (including online therapy like BetterHelp)
• Urgent care and emergency room visits
• Hospital stays
• Medical equipment (crutches, blood pressure monitors, thermometers)
• Glasses, contacts, and contact solution
• Dental exams, cleanings, fillings, braces, crowns
• LASIK eye surgery
• Acupuncture
• Chiropractic care

Over-the-Counter Items (Expanded Post-2020)

A 2020 law permanently expanded FSA-eligible OTC items to include:

• Pain relievers (Tylenol, Advil, Aleve)
• Cold and flu medicines
• Allergy medicines (Claritin, Zyrtec, Benadryl)
• Acid reflux medications
• First aid supplies (bandages, antiseptic)
• Feminine hygiene products (tampons, pads)
• Sunscreen (SPF 15+)
• Condoms and contraceptives
• Pregnancy tests
• Sleep aids
• Vitamins and supplements — only if prescribed by a doctor

What FSAs Don't Cover

• Cosmetic procedures (teeth whitening, Botox, elective cosmetic surgery)
• Gym memberships (unless prescribed for a specific medical condition)
• Weight loss programs (unless treating a diagnosed disease like obesity)
• General health and wellness expenses not tied to a diagnosis
• Health insurance premiums

For the full IRS list, check IRS Publication 502 or your FSA administrator's eligible expense list — most have searchable databases.

The Use-It-Or-Lose-It Rule (And How to Not Lose Money)

The biggest FSA gotcha: unlike an HSA, money in a healthcare FSA generally doesn't roll over at year-end. If you don't spend it by December 31, you lose it.

Two employer-option exceptions:

• Grace period: Your employer can offer a 2.5-month grace period — meaning you have until March 15 to use the previous year's funds. Check your plan documents.
• $640 rollover (2026 limit): Your employer can allow up to $640 of unspent FSA funds to roll over to the next year. Again, check your plan — not all employers offer this.

Even with these options, you're at risk of losing money if you wildly overestimate your healthcare spending. Here's how to not lose anything:

Strategy 1: Estimate Conservatively

Review last year's healthcare spending (prescription costs, copays, dental work, vision). Contribute an amount you're confident you'll spend, not an aspirational number. If you're unsure, start with $500-1,000 and increase in subsequent years once you understand your typical spending.

Strategy 2: Stock Up at Year-End

If December arrives and you have $300 left in your FSA, use it on FSA-eligible OTC items you'll use anyway — stockpile Tylenol, allergy meds, sunscreen, first aid supplies, and contact lens solution. You're buying things you'd buy anyway, just front-loading the purchase with pre-tax money.

Strategy 3: Schedule the Dental Work

Dentists can often schedule cleaning and exams in late December (many people cancel appointments then). A regular cleaning ($100-200 after copay), plus any work your dentist has been recommending (filling, crown) can use up significant FSA balance before year-end.

Strategy 4: Pay for Therapy

Mental health therapy is FSA-eligible. If you've been considering starting therapy, your FSA can make it more affordable — and using it toward year-end prevents losing the funds.

How to Use Your FSA

Most employers provide an FSA debit card (linked to your FSA balance). You swipe it like a regular debit card at healthcare providers, pharmacies, and eligible retailers.

Some FSA administrators require receipts for all purchases, especially OTC items. Keep your receipts. If you're audited and can't prove the purchase was FSA-eligible, you'll owe taxes and a 20% penalty on the amount.

You can also pay out-of-pocket and submit a claim for reimbursement through your FSA administrator's website or app — useful when the merchant doesn't accept FSA debit cards.

FSA vs. HSA: Which Is Right for You?

If your employer offers both options, here's the core distinction:

• FSA: Works with any health plan. Full amount available immediately. Use it or lose it (mostly). Can't take it with you when you leave the job.
• HSA: Only available with a High-Deductible Health Plan (HDHP). Funds roll over forever. Can be invested like a retirement account. Stays with you if you change jobs.

If you have an HDHP and qualify for an HSA, the HSA is almost always superior — it's a better long-term savings vehicle. The FSA is the right choice when you're on a traditional (non-HDHP) plan and have predictable healthcare spending each year.

You cannot have both a healthcare FSA and an HSA simultaneously (with limited exceptions like the limited purpose FSA). Your plan type determines which you're eligible for.

Open Enrollment: When to Enroll and What to Decide

FSA enrollment happens during your employer's open enrollment period, typically each fall for coverage starting January 1. You must actively elect to contribute — it's not automatic.

Decide before enrollment:

• What healthcare expenses do you expect next year? (prescriptions, planned procedures, dental work, therapy)
• What's a conservative estimate you're confident you'll spend?
• Does your employer offer a rollover or grace period? (This affects how conservatively you should estimate)

Missing open enrollment means waiting until next year — so mark the dates and make a decision, even if you start conservatively.

Getting the Most Out of Your FSA with Cash Balancer

Tracking FSA spending alongside your regular budget can be tricky — healthcare costs are unpredictable and FSA-eligible purchases come from multiple places. Cash Balancer helps you categorize healthcare expenses separately so you can see exactly what you're spending on health across the year.

This makes it much easier to estimate your FSA contribution for next year's open enrollment — look at this year's healthcare category total and you have a concrete baseline for what to elect.

Download Cash Balancer free on iOS and create a "Healthcare" budget category to track every out-of-pocket medical cost through the year. By November, you'll have a precise data-driven FSA election decision instead of guessing.

The Bottom Line

An FSA is free money — a 20-35% discount on healthcare expenses you were going to pay anyway. If your employer offers one and you're not using it, you're leaving real money on the table every year.

The use-it-or-lose-it rule is the only real downside — and it's manageable with reasonable estimation and a year-end sweep of eligible OTC purchases. Start with a conservative contribution, learn your actual spending pattern, and increase your election in future years.

The one requirement: you have to enroll during open enrollment. Put it on your calendar and make the decision. Future you — with the 30% discount on dental work and prescriptions — will be grateful you did.