The Cafeteria Plan “Uniform” Rules

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The Cafeteria Plan “Uniform” Rules

By Brian Gilmore | Published May 20, 2026

Question: What are the Section 125 cafeteria plan rules that require contributions and benefits to be provided on a “uniform” basis?

Short Answer: Health FSAs must provide “uniform coverage,” the Section 125 nondiscrimination rules require employers to provide a “uniform election” with respect to contributions, and employers must implement cafeteria plan elections on a “uniform interval”.

The Basics: Section 125 Cafeteria Plans The Section 125 cafeteria plan facilitates employee elections between taxable income and nontaxable health and welfare benefits, allowing employees to contribute on a pre-tax basis to a variety of “qualified benefits” such as medical, dental, vision, health FSA, dependent care FSA, and HSA.

For more details:

The Three “Uniform” Requirements for Cafeteria Plans The Section 125 rules impose multiple requirements for cafeteria plans to maintain their tax-advantaged status, including adoption of a plan document, irrevocable elections, limiting benefits to only those that are qualified, and the FSA use-it-or-lose-it rule, substantiation requirements, and forfeiture allocation restrictions.

Among these cafeteria plan requirements are three distinct mandates that the plan provide certain contributions and benefits on a “uniform” basis:

  1. The Uniform Coverage Rule
  2. The Uniform Election Rule
  3. The Uniform Interval Rule

The Uniform Coverage Rule: Full Health FSA Election Available During Plan Year The Section 125 proposed regulations and additional IRS guidance confirm that the health FSA “Uniform Coverage Rule” requires the full amount of a participant’s election be available for reimbursement at all times during the plan year.

There are several important principles that flow from the health FSA Uniform Coverage Rule:

The Uniform Coverage Rule creates the risk of experience losses (borne by the employer) caused by overspent accounts from employees who terminate mid-year. However, it is also common for there to be significant forfeitures at the end of the health FSA plan year caused by the use-it-or-lose-it rule. These forfeitures frequently cause net experience gains (i.e., total employee forfeitures exceeding overspent account losses).

This risk-shifting process imposed by the combination of the Uniform Coverage Rule (overspent accounts) and the use-it-or-lose-it rule (forfeitures) is designed to conform to the Code Sections 105 and 106 requirements for insurance-style risk shifting in tax-free health coverage.

The Uniform Election Rule: Nondiscriminatory Contributions for Highly Compensated Participants The Section 125 cafeteria plan rules govern employee pre-tax contributions to the health plan, including provisions designed to ensure that contributions and benefits are available on a nondiscriminatory basis for highly compensated participants (HCPs) and non-HCPs. For purposes of the Section 125 nondiscrimination rules, an HCP is:

A key component of these contributions and benefits nondiscrimination rules requires that the cafeteria plan provide a “uniform election with respect to employer contributions.” This “Uniform Election Rule” is designed to prevent employers from contributing more for certain highly paid classes (HCPs such as executives or managers) to participate in the same health plan option for which non-HCPs are eligible.

The Uniform Election Rule generally prohibits providing any HCPs a larger employer contribution for the same plan option for which a non-HCP is eligible. In other words, if both HCPs and non-HCPs are eligible for the same plan option, the employer contribution generally must be at least as generous as for non-HCPs.

The Uniform Election Rule also applies for HSA purposes if employees can contribute to the HSA through payroll on a pre-tax basis. This means that employers generally must make at least the same employer HSA contribution amount available to non-HCPs as to any HCPs enrolled in the same HDHP plan option.

Contributions May Vary for “Similarly Situated” Classes of Employees The Uniform Election Rule prevents employers from providing a greater contribution for any HCP than any non HCPs who are “similarly situated participants” eligible for the same plan option. Thus, employers may provide a greater contribution to classes of employees with HCPs if the non-HCPs are not “similarly situated.” The rules provide that “reasonable differences in plan benefits may be taken into account” to determine which participants are “similarly situated,” which allows for some common class-based contribution distinctions.

Geographic Location-Based Contribution Classes Permitted The definition of “similarly situated” expressly recognizes the employer’s ability to categorize employee groups based on “employees working in different geographical locations”. Employers therefore generally may design different contribution structures for employee classes by region without violating the Uniform Election Rule.

Division-Based Contribution Classes Likely Permitted While not expressly addressed in the definition of “similarly situated,” many practitioners also interpret the Uniform Election Rule to permit different contribution strategies for employers with multiple EINs for subsidiaries, divisions, or other related entities within the same controlled group participating in the same underlying health benefits. The nondiscrimination rules appear to accommodate employers in this situation through either a) allowing employers to disaggregate and test separately the contributions and benefits provided for each division within a cafeteria plan, or b) creating a separate cafeteria plan for each entity with differing contribution structures. This is a reasonable and common approach for employers to consider where the organization has a bona fide division-based class that is not designed to favor HCPs in operation.

The Common Workaround to the Uniform Election Rule Employers often face competitive pressures to offer certain classes of HCPs (e.g., executives, upper management) more generous contributions to the health plan than non-HCPs. This is generally not an option for HCPs who are “similarly situated” to non-HCPs because of the Uniform Election Rule limitations.

Employers commonly avoid this restriction by providing higher standard compensation to the HCP class. The HCPs can make an election (through the Section 125 cafeteria plan) to apply the additional compensation on a pre-tax basis to the employee-share of the health plan premium. This compensation boost can put both parties in the same position as if the HCP had received the more generous employer health plan contribution.

Example:

Result:

Effect of a Discriminatory Cafeteria Plan If the IRS were to find an employer’s cafeteria plan contribution structure discriminatory, HCPs could be taxed on their contributions. For example, an HCP who paid $500/month for coverage on a pre-tax basis under a discriminatory cafeteria plan could retroactively have those contributions included in taxable gross income.

The Uniform Interval Rule: Consistent Contributions Throughout the Plan Year Employees’ elections to pay the employee-share of the premium for health and welfare plan coverage on a pre-tax basis, or make pre-tax FSA or HSA contributions, are governed by the Section 125 cafeteria plan rules. These rules require that the interval for employee salary reduction contributions be uniform for all participants, often referred to as the “Uniform Interval Rule”.

The Uniform Interval Rule offers employers the discretion to specify any consistent interval for taking employee contributions. Almost all employers provide a uniform contribution interval throughout the plan year designed to mirror their standard payroll schedule (e.g., semi-monthly or bi-weekly contribution intervals). In some cases, employers may design the intervals to mirror a specific timeframe related to the industry work calendar, such as excluding the summer months for school districts.

Note: While the Uniform Interval Rule appears in a section of the regulations addressing FSA contributions, it is often interpreted more broadly in the cafeteria plan context.

Although it is not explicit in the Uniform Interval Rule that employers must take salary reduction contributions ratably throughout all of the intervals (which in most cases spread through the full plan year), it is unlikely the Uniform Interval Rule permits employees to elect to contribute different amounts at any particular interval. Accordingly, the Uniform Interval Rule is generally viewed as a barrier to front-loading employee contributions.

Common Employee Front-Load Request #1: Dependent Care FSA Given that the dependent care FSA is not subject to the Uniform Coverage Rule, employees often request to front load dependent care FSA contributions at the start of the plan year or prior to a planned termination of employment. Employers generally will not accommodate these requests because the Uniform Interval Rule is widely interpreted to require ratable contributions throughout the plan year.

Example:

Result:

Common Employee Front-Load Request #2: HSA Employees often believe they can follow the same approach as with their 401(k) election to front-load and “max out” their HSA contributions through payroll at the start of the year or prior to termination of employment. However, most employers implement the employee’s election ratably pursuant to the Uniform Interval Rule by taking the standard per-paycheck HSA contribution spread over the full plan year.

Example:

Result:

In addition to the potential Uniform Interval Rule issues, front-loading HSA contributions through payroll may cause excess HSA contributions under the proportional contribution rule if the employee loses HSA eligibility.

For more details:

Employees can always front-load HSA contributions outside of payroll and claim the above-the-line deduction on Schedule 1 of their individual tax return. This approach receives the same income tax treatment as a pre-tax contribution through the cafeteria plan, but it does not enjoy the exemption from payroll taxes (generally, the FICA 6.2% Social Security and 1.45% Medicare payroll taxes).

Summary Section 125 cafeteria plans must comply by three distinct “uniform” requirements in plan design and operations—the Uniform Coverage Rule, the Uniform Election Rule, and the Uniform Interval Rule. Employers should be familiar with these restrictions and the best practices to avoid potential violations.