Cafeteria Plans (Section 125): Setup, Compliance, and Common Errors
6/8/2026
A cafeteria plan under Section 125 is what makes "pre-tax" health premiums possible. Without one, employee contributions toward health coverage are paid with after-tax dollars — which means a great many employers are relying on a plan they have never actually documented.
That is the first and most common failure. The exclusion is conditioned on a written plan meeting specific requirements, and the absence of one is a straightforward finding.
What a Cafeteria Plan Does
Section 125 permits employees to choose between cash compensation and qualified non-taxable benefits without triggering the constructive receipt doctrine, which would otherwise make the mere ability to take cash taxable.
The tax result is the strongest available in payroll. Contributions through a properly maintained cafeteria plan reduce all four wage bases:
- Federal income tax wages
- Social Security wages
- Medicare wages
- FUTA and state unemployment wages
That last point carries a benefit employers frequently overlook: because cafeteria plan contributions reduce FICA wages, the employer saves its own 7.65% matching share on every dollar contributed. The plan is not purely an employee benefit.
Compare this to a traditional 401(k) deferral, which reduces income tax wages only. See our pre-tax vs. post-tax deductions guide for the matrix.
Our Cafeteria Plan Training & Certification Program covers plan design and administration.
Qualified Benefits
A cafeteria plan may offer:
- Employer-provided accident and health coverage, including medical, dental, and vision
- Health flexible spending arrangements — 2026 limit $3,400, with a permitted carryover of up to $680
- Dependent care assistance — 2026 limit $7,500, or $3,750 for married filing separately, a substantial increase from the long-standing $5,000
- Group-term life insurance, subject to the $50,000 imputed income threshold
- Health savings account contributions
- Adoption assistance
- Disability coverage
It may not offer, among other things: long-term care insurance, qualified transportation fringe benefits (which have their own exclusion outside Section 125), educational assistance, most deferred compensation, or archer MSAs. Including an impermissible benefit can disqualify the plan.
Note the distinction on HSAs: contributions made through the cafeteria plan reduce all four wage bases. A direct payroll deduction to an HSA outside a cafeteria plan reduces income tax only. Same account, different tax result, determined entirely by the routing.
The Written Plan Requirement
The plan document must exist in writing, be adopted before the plan year to which it applies, and include:
- A description of the available benefits
- Eligibility rules
- The election procedures
- The manner of employer and employee contributions
- The plan year
- The maximum employer contribution or the method of determining it
- For a health FSA, the maximum reimbursement and the coverage period
Two failures recur:
No plan document at all. Common in smaller employers, where pre-tax premium deductions have been running for years on the assumption that this is simply how payroll works. The remedy is to adopt a document going forward; the prior treatment is exposed.
Retroactive adoption. A plan document cannot be adopted retroactively to cover a year already elapsed. Amendments generally operate prospectively as well.
The plan must also be operated consistently with its terms. A plan document permitting mid-year changes only for specified events, administered as though changes were freely allowed, is an operational failure regardless of what the document says.
Irrevocable Elections and Permitted Change Events
This is the rule employees push against most, and where administrators most often create problems by being accommodating.
Elections are irrevocable for the plan year once the year begins, unless a permitted change event occurs. Elections must be made before the start of the plan year, or before coverage begins for a new hire.
Generally permitted change events include:
- Marriage, divorce, legal separation, or annulment
- Birth, adoption, or placement for adoption
- Death of a spouse or dependent
- A change in employment status affecting eligibility, for the employee or their spouse
- A dependent gaining or losing eligibility — for example, aging out
- A change in residence affecting plan eligibility
- A significant change in cost or coverage, where the plan permits
- Entitlement to Medicare or Medicaid
- A judgment, decree, or order requiring coverage of a child
- Special enrollment rights under HIPAA
- Certain leaves under the FMLA
Two constraints that get missed:
The election change must be consistent with the event. A birth permits adding the child; it does not permit switching dental carriers or dropping a spouse for unrelated reasons.
Timing limits apply. Most plans require the change request within a defined window — commonly 30 or 60 days — and honoring a late request is an operational failure.
The dependent care FSA is different in one respect: it has its own change rules, including changes tied to cost or coverage changes in dependent care, which are broader than the health FSA's.
Allowing an impermissible mid-year change puts the plan's tax treatment at risk — potentially for everyone in the plan, not only the accommodated employee. That asymmetry is why "just this once" is a bad answer.
Health FSA Rules Payroll Must Know
Uniform coverage. A health FSA must make the full annual elected amount available from the start of the plan year, regardless of how much has been contributed. An employee electing $3,400 who terminates in February having contributed $283 may have already been reimbursed the full $3,400.
The risk of loss runs to the employer. The employer generally absorbs the shortfall when an employee terminates having used more than they contributed, and generally cannot recover it from the employee. This is the trade-off for the favorable tax treatment.
Use-or-lose, with two permitted relaxations. A plan may offer either a carryover of up to $680 for 2026, or a grace period of up to 2½ months after the plan year — but not both.
Dependent care FSAs have no carryover and are reimbursed only up to amounts actually contributed, unlike health FSAs.
Substantiation is required. Claims must be substantiated, and self-certification is generally insufficient. Debit card arrangements have specific substantiation rules.
Nondiscrimination Testing
Cafeteria plans are subject to nondiscrimination testing — an eligibility test, a contributions and benefits test, and a key employee concentration test, with additional tests for health FSAs and dependent care.
When a plan fails, the highly compensated or key employees lose the exclusion and must include their benefits in taxable income; other participants are unaffected.
The payroll consequence is a year-end imputation for a specific group, frequently executives, at the busiest time of year. Request testing early enough that a failure can be addressed before December.
Common Errors
- No written plan document, or one adopted retroactively
- Allowing mid-year changes outside permitted events, or outside the timing window
- Permitting a change inconsistent with the event that triggered it
- Configuring the deduction as pre-tax for income tax only, missing the FICA and unemployment reductions
- Routing HSA contributions outside the plan while treating them as though they went through it
- Failing uniform coverage on a health FSA by limiting reimbursement to amounts contributed
- Offering both a carryover and a grace period
- Applying health FSA carryover rules to a dependent care FSA
- Including an impermissible benefit in the plan
- Skipping nondiscrimination testing, or running it too late to correct
- Deducting for a terminated employee or failing to stop contributions at the correct date
- Not documenting elections, leaving no record of what the employee chose
Payroll's Operational Role
- [ ] Confirm a written plan document exists and was adopted before the plan year
- [ ] Confirm the deduction codes reduce all four wage bases
- [ ] Confirm HSA contributions are routed through the plan if that treatment is intended
- [ ] Load current-year limits: $3,400 health FSA, $680 carryover, $7,500 dependent care
- [ ] Capture and retain elections before the plan year begins
- [ ] Enforce the irrevocability rule, and route change requests to the plan administrator rather than approving them in payroll
- [ ] Verify each approved change is consistent with its triggering event and within the window
- [ ] Stop contributions accurately on termination and on coverage changes
- [ ] Coordinate with the administrator on nondiscrimination testing timing
- [ ] Reconcile total contributions per payroll to the administrator's records quarterly
That second-to-last point deserves emphasis: payroll should not decide whether a mid-year change is permitted. That determination belongs to the plan administrator, and routing it there protects both the plan and the payroll professional being pressured to accommodate.
Leaves of Absence
Cafeteria plan administration during a leave is a recurring source of confusion, because contributions normally come from wages and a leave may involve no wages to deduct from.
For FMLA leave, the employer must maintain group health coverage on the same terms as if the employee were working, which means arranging for the employee's contribution share. Three permitted approaches:
- Pre-pay — the employee contributes in advance, before the leave begins
- Pay-as-you-go — the employee remits payments during the leave, on a schedule
- Catch-up — the employer advances the contributions and recovers them from wages when the employee returns, under a written agreement made in advance
The catch-up method requires the arrangement to be documented before the leave, because recovering advanced premiums from returning wages is a deduction that needs its own authorization. Attempting to arrange it after the fact runs into the authorization problem covered in our voluntary deduction authorization guide.
For non-FMLA unpaid leave, the plan document governs. Options include continuing coverage with one of the arrangements above, or treating the leave as a change in status where the plan permits.
The failure mode is simple and common: the employee goes on leave, deductions stop because there are no wages, nobody arranges an alternative, premiums go unpaid, and coverage lapses — or the employer pays the employee's share and then discovers it has no authorization to recover it. Build the leave-onset step into the leave process rather than the payroll cycle.
Our Leave Management Compliance Suite covers the leave-side requirements.
Frequently Asked Questions
What is a Section 125 cafeteria plan?
A written plan permitting employees to choose between cash compensation and qualified non-taxable benefits without triggering constructive receipt. Contributions made through the plan reduce federal income tax, Social Security, Medicare, and unemployment wages — the strongest exclusion available in payroll — which also saves the employer its 7.65% FICA matching share on every dollar contributed.
Do you need a written plan document for pre-tax health premiums?
Yes. The Section 125 exclusion is conditioned on a written plan meeting specific content requirements and adopted before the plan year it covers. Deducting health premiums pre-tax without a plan document is a common finding, particularly among smaller employers where the practice has run for years on the assumption that it is simply how payroll works. A plan cannot be adopted retroactively to cover an elapsed year.
Can an employee change a cafeteria plan election mid-year?
Only on a permitted change event — marriage, divorce, birth or adoption, death, a change in employment status affecting eligibility, a dependent gaining or losing eligibility, a residence change, entitlement to Medicare or Medicaid, a court order requiring coverage, HIPAA special enrollment, or certain FMLA leaves. The change must be consistent with the event and requested within the plan's window. Allowing an impermissible change can jeopardize the plan's tax treatment for all participants, not only the employee accommodated.
What is the health FSA limit for 2026?
$3,400, with a permitted carryover of up to $680 into the following plan year. A plan may offer either a carryover or a grace period of up to 2½ months, but not both. The dependent care FSA limit for 2026 is $7,500, or $3,750 for married filing separately — a substantial increase from the long-standing $5,000 — and dependent care FSAs have no carryover.
What is the uniform coverage rule for health FSAs?
A health FSA must make the full annual elected amount available from the beginning of the plan year, regardless of how much the employee has contributed to date. An employee electing $3,400 who terminates in February may already have been reimbursed the full amount while having contributed only a fraction. The employer generally absorbs that loss and cannot recover it from the employee — the trade-off for the plan's favorable tax treatment.
What happens if a cafeteria plan fails nondiscrimination testing?
Highly compensated or key employees lose the exclusion and must include their benefits in taxable income, while other participants are unaffected. Because this creates a year-end imputation for a specific group — often executives — payroll should coordinate with the plan administrator to obtain testing results early enough that a failure can be addressed before December rather than during it.
Going Deeper
Cafeteria plan limits are adjusted annually and the permitted change event rules are detailed. Verify current-year figures and confirm any mid-year election change against the plan document with the plan administrator rather than deciding in payroll.
