Pre-tax benefits let you pay for certain expenses with money before income tax is taken out

A pre-tax benefit is an arrangement where you and your employer agree that some of your salary goes toward specific expenses — usually health insurance, dental, vision, transit, parking, or childcare — before federal and state income taxes are calculated. The money never appears on your taxable income, so you owe less tax overall. Your employer deducts it from your paycheck, sends it to the benefit provider, and reports a lower gross income to the IRS.

The trade-off is real: you commit to spending that money on those expenses for the entire year, and you cannot change your mind or get the unused portion back. If you set aside $200 a month for a health savings account and only spend $1,500 of it, the remaining $900 is gone — your employer keeps it. This is called the "use-it-or-lose-it" rule, though some plans now offer a small carryover or grace period.

Key Takeaways

  • Pre-tax benefits reduce your taxable income, which lowers the federal and state income tax you owe, but the money is locked into that specific expense category for the year.
  • Common pre-tax benefits include health insurance premiums, health savings accounts (HSAs), flexible spending accounts (FSAs), dependent care accounts, and transit or parking costs.
  • You must enroll during your employer's open enrollment period, usually once per year, and the amount you choose stays fixed unless you have a may have access to life event like a birth, marriage, or job loss.
  • Unused money in an FSA is forfeited at the end of the year under the use-it-or-lose-it rule, though some employers now allow a small carryover or a grace period to spend it down.
  • Pre-tax benefits do not reduce Social Security or Medicare taxes, only federal and state income tax.

How much tax you actually save

The tax savings depend on your income tax bracket and which benefits you choose. If you earn $60,000 a year and contribute $3,000 to a health savings account, that $3,000 is not counted as income. If your federal tax bracket is 22 percent and your state tax is 5 percent, you save roughly $810 in taxes on that $3,000 — about 27 percent of the contribution. Lower-income workers save less in dollars but the same percentage; higher-income workers save more.

The savings are automatic — you do not have to claim anything on your tax return. Your employer reports the pre-tax deduction to the IRS, and your W-2 already reflects the lower taxable income. Self-employed people and gig workers do not have access to most pre-tax benefits because there is no employer to administer the deduction.

The most common pre-tax benefit accounts

Health Savings Accounts (HSAs) are available only if you are enrolled in a high-deductible health plan. You can contribute up to $4,150 per year (for individual coverage) or $8,300 (for family coverage) as of 2024, though these limits change annually. The money rolls over year to year, so unused funds stay in the account. You can withdraw it tax-free for may have access to medical expenses: copays, deductibles, prescriptions, dental work, vision care, and some medical equipment. After age 65, you can withdraw money for any reason, though non-medical withdrawals are taxed as income.

Flexible Spending Accounts (FSAs) work similarly to HSAs but have stricter rules. You can set aside up to $3,300 per year for medical expenses (copays, deductibles, prescriptions, dental, vision), and the money does not roll over — anything unused at the end of the year is forfeited. Some employers now offer a $640 carryover or a two-month grace period to spend down the account. FSAs are available to anyone with employer health insurance, regardless of deductible level.

Dependent Care FSAs let you set aside up to $5,000 per year for childcare, preschool, summer camp, or adult day care for a dependent. The money is pre-tax and does not roll over. You must have a may have access to dependent and a work-related reason for the care (both spouses working, one spouse in school, or one spouse unable to care for the child).

Transit and Parking Benefits let you pay for public transportation passes or parking with pre-tax money, up to $315 per month for transit and $315 per month for parking as of 2024. These limits also change annually. The money is deducted from your paycheck and sent directly to the transit authority or parking provider.

When you can enroll and make changes

Most employers have an open enrollment period once per year, usually in the fall, when you can enroll in pre-tax benefits or change the amount you contribute. The changes take effect January 1 of the following year. If you miss open enrollment, you cannot change your elections until the next year unless you have a may have access to life event.

may have access to life events include birth or adoption of a child, marriage or divorce, death of a spouse or dependent, loss of health insurance coverage, significant change in income, or relocation to a different state. You typically have 30 to 60 days after the event to notify your employer and make changes. Some employers are stricter than others about what counts as may have access to, so check your plan documents or ask your HR department.

The use-it-or-lose-it rule and how to avoid it

If you contribute $2,400 to an FSA for medical expenses and only spend $1,800, the remaining $600 is forfeited. Your employer keeps it — it does not roll over, you cannot withdraw it, and you cannot get it refunded. This is why FSAs require careful planning: you need to estimate your actual medical expenses for the year and contribute only what you will realistically spend.

HSAs do not have this rule — unused money stays in the account indefinitely and can be used in future years. Some employers now offer FSA carryovers (up to $640 per year) or grace periods (usually two months into the next year) to reduce the risk of forfeiture, but this varies by plan. Check your employer's plan documents or ask HR whether your FSA has either option.

To avoid losing money, track your spending throughout the year and adjust your contribution if your circumstances change. If you have a may have access to life event, you can lower your FSA contribution mid-year. If you realize in November that you will not spend all your FSA money, some employers allow you to suspend contributions for the remainder of the year.

Pre-tax benefits and Social Security and Medicare taxes

Pre-tax benefits reduce your federal and state income tax, but they do not reduce Social Security or Medicare taxes (FICA). If you contribute $3,000 to an HSA, you save income tax on that $3,000, but you still pay 6.2 percent Social Security tax and 1.45 percent Medicare tax on it. This is a smaller savings than income tax, but it still adds up over time.

Health insurance premiums are an exception: they are deducted before all taxes, including Social Security and Medicare. This is why employer health insurance is such a significant benefit — it reduces your taxable income and your FICA taxes.

Frequently Asked Questions

Can I use my FSA or HSA for over-the-counter medications?

Yes, but only if you have a prescription from a doctor. As of 2020, over-the-counter medications like ibuprofen or allergy medicine are covered if prescribed, but not if you buy them without a prescription. Insulin is the one exception — you can buy it without a prescription and still use FSA or HSA funds.

What happens to my pre-tax benefits if I leave my job?

HSA funds stay with you — they are yours to keep and use whenever you want for may have access to medical expenses. FSA funds are forfeited when you leave your job, with rare exceptions. You may be able to continue your health insurance through COBRA, but any unused FSA money is gone. Check with your employer's HR department about the exact rules.

Can I contribute to both an HSA and an FSA at the same time?

No. If you are enrolled in a high-deductible health plan and have an HSA, you cannot also have an FSA for medical expenses. You can have a dependent care FSA at the same time as an HSA, and you can have a transit or parking benefit account alongside either one.

Do pre-tax benefits count as income for means-tested programs?

No. Pre-tax benefits are not counted as income for programs like Medicaid, SNAP, or housing assistance. Because the money is deducted before taxes, it does not appear on your tax return as income, so it does not affect your may be able to access for these programs.

What if I estimate wrong and run out of FSA money before the end of the year?

You cannot withdraw more than you contributed, and you cannot borrow against future contributions. If you exhaust your FSA balance, you pay out of pocket for the rest of the year. This is another reason to be conservative with your FSA contribution — it is better to contribute less and have leftover money than to run out mid-year.