How Cafeteria Plan Reimbursements Work

5/4/2026

Employees participate in a Section 125 Cafeteria Plan for one primary reason: to save money on essential healthcare and dependent care costs. They agree to set aside a portion of their paychecks before taxes, lowering their overall taxable income. But putting money into the plan is only the first half of the process. The second half is getting that money back out.

Reimbursements are the operational core of Flexible Spending Accounts (FSAs) and Health Reimbursement Arrangements (HRAs). Processing these claims correctly ensures that employees receive their funds quickly while keeping the employer fully compliant with strict IRS tax laws. If your organization mismanages this process, the tax-advantaged status of the entire plan is at risk.

This article serves as the fourth installment in our ongoing series on Section 125 administration. If you need to build your foundational knowledge first, we highly recommend reading What Is a Cafeteria Plan (Section 125)? A Complete Guide and exploring How Cafeteria Plans Work: Step-by-Step for Employers.

Below, we detail the exact mechanics of cafeteria plan reimbursements. We explore how claims are filed, the strict IRS substantiation requirements, the differences between manual claims and debit card transactions, and the nuances of the use-it-or-lose-it rule.

 

The Core Mechanics of Section 125 Reimbursements

A cafeteria plan reimbursement is the process of distributing tax-free money to an employee to cover an eligible expense. Because the IRS allows these funds to bypass federal income, Social Security, and Medicare taxes, they highly regulate how the money is distributed. You cannot simply hand an employee cash from their FSA because they ask for it. The employee must incur a qualified expense, file a claim, and prove the expense is legitimate.

To understand reimbursements, you must understand the two primary accounts that generate them: Flexible Spending Accounts and Health Reimbursement Arrangements.

Flexible Spending Accounts (FSAs)

A Flexible Spending Account is an employee-funded account used to pay for out-of-pocket healthcare or dependent care expenses. During open enrollment, the employee elects an annual contribution amount. The employer deducts this amount from the employee's paychecks in equal installments throughout the year on a pre-tax basis.

When the employee visits a doctor, buys prescription glasses, or pays for daycare, they use the funds in their FSA to cover the cost. Because the money went into the account pre-tax and comes out tax-free, the employee effectively receives a significant discount on their essential expenses.

Health Reimbursement Arrangements (HRAs)

Unlike an FSA, a Health Reimbursement Arrangement is funded entirely by the employer. Employees cannot contribute a single dollar to an HRA. Employers set up HRAs to help employees pay for out-of-pocket medical expenses, such as deductibles, copayments, and coinsurance.

The reimbursement mechanics for an HRA look very similar to a health FSA. The employee incurs an eligible medical expense and submits a claim. The employer (or a third-party administrator) reviews the claim and releases the tax-free funds to the employee.

The Uniform Coverage Rule for Health FSAs

When discussing health FSA reimbursements, we must highlight a unique and critical regulation: the Uniform Coverage Rule.

This rule dictates that the full annual election amount of a health FSA must be available to the employee on the very first day of the plan year. For example, if an employee elects to contribute $2,400 to their health FSA for the year, the employer will deduct $200 per month from their paychecks. However, if the employee incurs a $2,400 medical bill on January 2nd, the employer must reimburse the full $2,400 immediately, even though the employee has only contributed a fraction of that amount through payroll.

The employer takes on a slight financial risk here. If the employee spends their full annual election in January and quits the company in February, the employer cannot demand the money back. They also cannot withhold the remaining balance from the employee's final paycheck. You must account for this uniform coverage risk when designing your plan and setting maximum contribution limits.

It is important to note that the Uniform Coverage Rule only applies to health FSAs. It does not apply to Dependent Care FSAs. For dependent care, employees can only be reimbursed up to the amount currently sitting in their account.

 

IRS Substantiation Requirements: Proving the Expense

You cannot operate a cafeteria plan on the honor system. The IRS requires strict proof that every single tax-free dollar went toward a legally qualified expense. This proof process is called substantiation.

What is Substantiation?

Substantiation is the process of verifying a claim. When an employee requests a reimbursement, they must provide third-party documentation showing that the expense is eligible under Section 125 rules. The employer, or the third-party administrator (TPA), must review this documentation before releasing any funds.

If an employer reimburses an employee without proper substantiation, the IRS views that distribution as taxable income. If a pattern of unsubstantiated reimbursements is discovered during an audit, the IRS can disqualify the entire cafeteria plan, resulting in massive tax penalties for both the company and the workforce.

The Five Required Pieces of Information

To properly substantiate a claim, the documentation provided by the employee must contain five specific pieces of information. A simple credit card receipt showing the payment amount is never sufficient. The IRS requires an itemized receipt or an Explanation of Benefits (EOB) from the insurance carrier that displays:

1. Patient Name: The document must show who received the care or service. This must be the employee, their spouse, or an eligible dependent.
2. Provider Name: The document must clearly state the name of the doctor, hospital, pharmacy, or daycare facility that provided the service.
3. Date of Service: The expense must be incurred during the active plan year. The date of service is what matters, not the date the employee paid the bill.
4. Description of Service: The document must describe what the service or product was. You need to know if the charge was for an office visit, a prescription drug, or a cosmetic procedure (which is not eligible).
5. Amount of the Expense: The document must show the final out-of-pocket cost to the employee after insurance has paid its portion.

If a receipt is missing any of these five elements, you must deny the claim and ask the employee to submit additional documentation.

Enforcing the Rules

Many employees find substantiation rules frustrating. They do not understand why HR needs an itemized receipt for a $20 copay when they already submitted a credit card slip.

Communication is your best tool here. Educate your employees during open enrollment about the IRS requirements. Explain that these rules protect their tax-free benefits. When employees know what information they need upfront, they are more likely to request the correct receipts from their healthcare providers before leaving the clinic.

 

Manual Claims vs. Debit Card Transactions

The way employees access their funds has evolved significantly. While paper forms were once the only option, modern technology offers faster, more integrated solutions. Today, employers generally process reimbursements through two methods: manual claims and benefits debit cards.

Processing Manual Claims

A manual claim requires the employee to pay for the expense out of their own pocket first. They then submit a reimbursement request to their employer or TPA.

The process typically follows these steps:

1. The employee visits a doctor and pays the $100 bill using their personal checking account.
2. The employee logs into the benefits administration portal (or fills out a paper form) and files a claim.
3. They upload an image of the itemized receipt or EOB.
4. The administrator reviews the documentation against the five required substantiation elements.
5. Once approved, the administrator issues a $100 reimbursement to the employee, usually via direct deposit.

Manual claims provide the highest level of control and accuracy because a human (or sophisticated software) reviews every single detail before money leaves the account. However, this method requires the employee to temporarily float the cost of their healthcare, which can create financial strain for large expenses.

The Rise of Benefits Debit Cards

To make FSAs and HRAs more user-friendly, most administrators now offer benefits debit cards. These cards are linked directly to the employee's pre-tax account balance.

When an employee visits the pharmacy, they swipe their benefits card just like a regular bank card. The funds are pulled directly from their FSA or HRA to pay the merchant. This eliminates the need for the employee to pay out-of-pocket and wait for a reimbursement check.

While debit cards provide excellent convenience, they introduce a major compliance trap: the illusion that substantiation is no longer required.

Auto-Substantiation and Its Limits

Many employees believe that if a swipe goes through on their benefits debit card, the expense is automatically approved. This is completely false. The IRS still requires substantiation for every debit card transaction.

Fortunately, technology allows many debit card swipes to be “auto-substantiated“ at the point of sale. Auto-substantiation happens without the employee needing to upload a receipt. This typically occurs in two ways:

1. Inventory Information Approval System (IIAS): Most major pharmacies and grocery stores use an IIAS. When the employee swipes their card, the store's computer system scans the specific items purchased against an IRS database of eligible medical expenses. The system only allows the benefits card to pay for the eligible items (like bandages and prescription medications). The employee must use a different payment method for non-eligible items (like magazines and snacks). Because the system verifies the items at the register, the claim is auto-substantiated.
2. Copayment Matching: If an employee swipes their card at a medical clinic for a flat amount that exactly matches the health plan's specific copay (e.g., exactly $30.00), the system will auto-substantiate the claim, assuming it was for a standard office visit.

However, if an employee swipes their card at a dental office for $142.50, the system cannot auto-substantiate the transaction. The amount does not match a standard copay, and the dental office does not use an IIAS.

In this scenario, the transaction goes through, and the provider gets paid. But the claim is not complete. The administrator must place a flag on the transaction and require the employee to upload an itemized receipt to prove the $142.50 was for an eligible filling and not an ineligible cosmetic teeth-whitening procedure.

If the employee fails to provide the receipt, the employer must take action. They must deactivate the debit card, request that the employee repay the plan with after-tax dollars, or, as a last resort, deduct the amount from the employee's future wages (if permitted by state law). Managing debit card receipt requests is one of the most time-consuming tasks in cafeteria plan administration.

 

The “Use-It-Or-Lose-It“ Rule

One of the most defining characteristics of a Flexible Spending Account is the strict timeline attached to the funds. Employees must incur their eligible expenses within the designated plan year. If they do not spend all the money they contributed by the end of the year, they lose the remaining balance.

Understanding the Forfeiture Rule

The IRS established the use-it-or-lose-it rule to prevent employees from using FSAs as long-term, tax-free investment accounts. An FSA is designed for current-year expenses.

If an employee contributes $2,000 to their health FSA but only incurs $1,500 in medical expenses by December 31st (assuming a calendar plan year), the remaining $500 is forfeited. The employee cannot cash it out, and they cannot roll it over to a standard bank account.

The forfeited funds revert to the employer. The IRS dictates exactly how an employer can use these forfeited funds. You cannot simply absorb the money into the company's general profits. The funds must be used to offset the administrative costs of running the cafeteria plan for the year. If funds still remain, they can be distributed evenly among the next year's FSA participants, or used to reduce the required salary reduction amounts for the following year.

Employer Options for Relief

Because the use-it-or-lose-it rule causes significant anxiety for employees, the IRS gives employers two options to provide some relief. Employers can choose to write one of these options into their plan document, but they cannot offer both simultaneously.

1. The Grace Period

An employer can amend their plan to include a grace period of up to two and a half months immediately following the end of the plan year. For a calendar year plan, this extends the deadline to March 15th. Employees can use the funds remaining in their prior year's account to pay for new expenses incurred during this grace period. If funds still remain after the grace period expires, they are forfeited.

2. The Carryover (Rollover)

Alternatively, an employer can allow employees to carry over a specific amount of unused health FSA funds into the next plan year. The IRS sets a maximum carryover limit that is indexed for inflation annually. The carried-over funds can be used for expenses incurred at any time during the new plan year. Any amount above the IRS carryover limit is forfeited at the end of the original plan year.

Note: The carryover rule only applies to health FSAs. Dependent Care FSAs cannot feature a carryover provision, though they can utilize a grace period.

Run-Out Periods

Do not confuse a grace period with a run-out period. A run-out period is an administrative window that allows employees to submit claims for expenses they incurred during the plan year.

For example, your plan year ends on December 31st. You might offer a 90-day run-out period ending on March 31st. If an employee visits the doctor on December 28th, they have until March 31st to gather their receipts and submit the claim for reimbursement. They cannot incur new expenses during the run-out period using the prior year's funds. Almost all well-designed cafeteria plans include a run-out period to account for delays in medical billing.

 

Common Reimbursement Mistakes and How to Avoid Them

Administering reimbursements involves processing thousands of data points. Errors happen, but systemic mistakes lead to compliance failures. Here are the most common traps administrators face and how you can prevent them.

Reimbursing Ineligible Expenses

Not all medical expenses are eligible for tax-free reimbursement. Section 213(d) of the IRS tax code defines what qualifies. Generally, the expense must alleviate or prevent a physical or mental defect or illness.

Many employees try to submit claims for general wellness items, vitamins, or cosmetic procedures. For example, a gym membership is not an eligible expense unless a doctor explicitly prescribes it to treat a specific, diagnosed medical condition (like obesity or a heart condition), which requires a Letter of Medical Necessity. If your team approves ineligible expenses, you jeopardize the plan. Ensure your administrators have clear guidelines and updated lists of eligible items.

Double-Dipping

An employee cannot be reimbursed for the same expense from two different tax-advantaged accounts. This is known as double-dipping.

For example, if an employee has a health FSA and their spouse has an HRA through a different employer, they cannot submit the same $500 hospital bill to both accounts. To prevent this, claim forms should include a legally binding attestation where the employee signs and confirms that the expense has not been reimbursed, and will not be submitted for reimbursement, under any other health plan.

Confusing HSA Rules with FSA/HRA Rules

If your organization offers Health Savings Accounts (HSAs) alongside FSAs and HRAs, you must understand that the reimbursement rules are fundamentally different.

Unlike FSAs, HSAs are individually owned bank accounts. They do not have a use-it-or-lose-it rule. Funds roll over indefinitely. Furthermore, employers are not required to substantiate HSA claims. The burden of proof falls entirely on the employee when they file their personal income taxes. Mixing up FSA substantiation rules with HSA freedom will cause massive administrative confusion.

If your benefits package includes HSAs, specific training is highly recommended. The HSA Training & Certification Program provides deep insight into how these tax-advantaged accounts integrate with broader benefits strategies.

 

Building Expertise in Cafeteria Plan Administration

Managing the flow of tax-free money requires more than basic administrative skills. It requires a comprehensive understanding of IRS regulations, tax codes, and compliance protocols. The cost of a mistake in the reimbursement process is simply too high to rely on guesswork or outdated information.

Professionals who manage benefits, process payroll, or oversee HR operations need targeted education to protect their organizations and serve their employees effectively.

We highly recommend investing in the Cafeteria Plan Training & Certification Program. This specialized program covers every critical aspect of Section 125 administration. You will learn the intricate details of plan design, documentation standards, claims processing, and the strict rules governing nondiscrimination testing. Earning this certification builds real-world expertise, reduces compliance risk, and strengthens your credibility as an HR leader.

 

Final Thoughts

Cafeteria plan reimbursements are where the theoretical tax advantages of Section 125 become a reality for your workforce. When an employee successfully uses their pre-tax funds to cover an unexpected medical bill or lower the burden of daycare costs, they see the direct value of their benefits package.

To deliver that value consistently, your organization must maintain an airtight reimbursement process. Enforce substantiation rules without exception. Audit your debit card transactions diligently. Communicate clearly with your employees about deadlines, grace periods, and eligible expenses. By mastering the mechanics of reimbursements, you ensure that your cafeteria plan remains a compliant, highly valued pillar of your total compensation strategy.

 

Learn More: How to Set Up a Cafeteria Plan (Step-by-Step Guide)