Can I use an FSA or HSA to pay for braces or Invisalign?

When an FSA plan year ends before treatment does

A health FSA is an employer-established benefit plan, and Publication 969 (2025) calls FSAs generally "use-it-or-lose-it" plans: amounts left at the end of the plan year can't generally be carried over, although a plan can provide either a grace period of up to 2 1/2 months or a carryover of unused amounts up to a yearly limit, which the plan may set lower, and a plan with a carryover is not permitted to also provide a grace period. Contributions are designated at the start of the plan year, so a consultation before enrollment gives you the treatment plan, its expected length and its cost to plan around.

For treatment over months, the IRS's 2007 proposed cafeteria plan regulations (opens in a new tab) treat a medical expense as incurred when the care is provided, "and not when the employee is formally billed, charged for, or pays for the medical care." The same proposed rules give a plan an orthodontia option: a plan "is permitted, but is not required to, reimburse employees for orthodontia services before the services are provided but only to the extent that the employee has actually made the payments in advance," with the payment substantiated and made within the period of coverage, and the IRS says taxpayers may rely on those proposed rules pending final ones.

Avoid electing more than the year's care will use; MouthHealthy, the American Dental Association's consumer site, advises: "Plan carefully so you don’t put more money in your account than you will spend within a year on dental or other health care costs." Then ask the plan administrator whether it reimburses orthodontia paid in advance, has a grace period or a carryover, and when claims for the plan year are due.

When the money is in an HSA

An HSA follows its own rules: Publication 969 says you can receive tax-free distributions for qualified medical expenses "you incur after you establish the HSA," you don't have to make withdrawals each year, and amounts remaining at the end of the year are generally carried over. State law determines when an HSA is established, Publication 969 adds, and an HSA funded by a rollover from another HSA is established on the date the prior account was established.

Contributing requires coverage under a high deductible health plan, among other requirements, and the 2007 proposed regulations say a person covered by a general purpose health FSA is not eligible to contribute to an HSA. We found no rule in Publication 969 on paying for orthodontic treatment in advance from an HSA, so ask the HSA's trustee or a tax professional.

Avoid counting care received before the account was established, because Publication 969 says "For HSA purposes, expenses incurred before you establish your HSA aren’t qualified medical expenses." Then keep the records Publication 969 asks for, showing each distribution paid qualified medical expenses not paid or reimbursed from another source and not claimed as an itemized deduction, kept with your tax records, not sent with your return.

When the treatment is Invisalign, or part of it looks cosmetic

Publication 502 (opens in a new tab) counts amounts paid "for the prevention and alleviation of dental disease" as medical expenses and lists braces among the procedures that treatment includes. We found no mention of aligners or Invisalign in Publication 502 or Publication 969; the AAO's answer speaks of orthodontic treatment, and MouthHealthy says FSAs generally cover "braces needed for dental health reasons," so the plan administrator decides how a claim for aligner treatment fits your plan.

Publication 502 also says you generally can't include cosmetic surgery, a procedure aimed at appearance that doesn't meaningfully promote the body's proper function or prevent or treat illness or disease, unless it is necessary to improve a deformity from a congenital abnormality, an injury from an accident or trauma, or a disfiguring disease.

Avoid assuming the answer either way; MouthHealthy's advice is to "Contact your FSA administrator for a list of covered services and products." Then ask which documentation the administrator accepts: Publication 969 asks for a written statement from an independent third party showing the expense was incurred and its amount, plus a statement that it hasn't been paid or reimbursed under other health plan coverage, and the proposed rules let a plan accept an insurer's explanation of benefits with the employee's certification instead of a receipt.

An FSA does not pay what a dental plan covers

Publication 969 lists "Amounts that are covered under another health plan" among the expenses an FSA can't pay; the dental plan's side is the topic of how orthodontic insurance works. Neither account changes the treatment or its cost: what drives the cost of Invisalign is a separate question, as are the payment plans the practice asks you to raise at the consultation.