What Is a Section 125 Cafeteria Plan?

A Section 125 cafeteria plan is a written, employer-sponsored benefit plan that allows employees to choose between taxable cash compensation and one or more qualified benefits paid with pre-tax dollars. The name comes directly from Section 125 of the Internal Revenue Code.

The “cafeteria” label is fitting: just as a cafeteria lets you choose your meal from a menu, this plan lets employees select benefits from a qualified list and pay for them before taxes are applied.

Here’s the legal point that makes this so valuable: Section 125 is the only mechanism through which an employer can offer a choice between taxable and non-taxable benefits without that choice itself making all benefits taxable. Without a valid plan in place, the IRS treats the full salary as taxable income regardless of what the employee elects. The plan is what creates the legal exception.

Three parties benefit when a plan is properly structured: employees pay less in federal income and payroll taxes, employers pay less in FICA matching obligations, and the whole arrangement is fully IRS-compliant.

How Does a Section 125 Plan Work in Payroll?

The mechanics are straightforward once you understand the sequencing.

Step 1 — Open enrollment: The employee elects benefits. That election is irrevocable for the plan year unless a qualifying life event occurs (marriage, divorce, birth of a child, etc.).

Step 2 — Pre-tax deduction: The elected benefit amount is deducted from gross wages before federal income tax, Social Security tax, and Medicare tax are calculated. The deduction comes out before the tax calculation, not after.

Step 3 — Reduced taxable wages: The result is a lower taxable wage base on every paycheck and, at year end, on the W-2. Box 1 (federal wages), Box 3 (Social Security wages), and Box 5 (Medicare wages) are all reduced by the pre-tax election amount.

The employer benefit follows the same logic. For every dollar an employee elects pre-tax, the employer’s FICA matching obligation — 7.65% — disappears. Here’s what that looks like in practice:

Both the employee and employer save $459 annually on that single $6,000 benefit election. Scale that across a full workforce and the numbers become significant.

Which Benefits Qualify Under a Section 125 Plan?

The IRS maintains a defined list of qualified benefits. Only items from this list can be offered pre-tax through a Section 125 plan. IRS Publication 15-B contains the complete list; the most common for small and mid-size employers are:

2026 Section 125 Contribution Limits

The IRS adjusts Section 125 contribution limits annually for inflation. The following reflects confirmed 2026 figures:

Who Can and Cannot Participate?

The S-corp exception is the one that most often catches small business owners off guard. If you own more than 2% of your S-corp, you’re treated as self-employed for Section 125 purposes. You cannot run your own health insurance premiums through the company’s cafeteria plan pre-tax. Rank-and-file employees of the S-corp are fully eligible and are not affected by your exclusion.

What Types of Section 125 Plans Are There?

Nondiscrimination Rules

Section 125 plans must pass annual nondiscrimination tests to ensure that tax-advantaged benefits aren’t disproportionately concentrated among owners and highly compensated employees. Three tests apply:

• Eligibility test — Verifies the plan doesn’t restrict participation in ways that favor highly compensated individuals.
• Contributions and benefits test — Confirms plan contributions and benefits aren’t weighted toward highly compensated participants.
• Key employee concentration test — Requires that no more than 25% of total nontaxable benefits flow to key employees.

For 2026, a highly compensated employee is anyone who earned more than $160,000 in the prior year. A key employee is an officer earning more than $235,000, any 5%+ owner, or a 1% owner earning more than $150,000.

If a plan fails any test, the consequence falls only on those highly compensated or key employees — not rank-and-file workers. Their pre-tax treatment is revoked and the value is added back to their W-2 wages.

Written Plan Document Requirements

A Section 125 plan does not exist in the eyes of the IRS until a valid written plan document is adopted. This is a hard requirement, not a best practice.

The plan document must be signed and adopted on or before the first day of the plan year for which it is effective. A retroactively dated document does not create a valid plan — courts and the IRS have consistently held that a document signed in December cannot retroactively make January through November contributions pre-tax.

The written plan must include: a description of each benefit offered, eligibility rules, election procedures and irrevocability terms, contribution limits, employer contribution terms (if any), plan year dates, and a defined list of qualifying life events that permit mid-year changes.

ERISA-covered benefits within the plan also require a Summary Plan Description (SPD), which must be distributed to new participants within 90 days of becoming eligible. When material changes occur, an updated SPD or summary of material modifications is required.

How to Set Up a Section 125 Plan: Step-by-Step

• 1

  Choose Your Plan Type

  Select from POP, FSA, full flex, or simple cafeteria plan based on your workforce size and benefit goals.

• 2

  Design Your Benefit Offerings

  Decide which qualified benefits to include. If you’re considering a supplemental health plan, AccuPay partners with Optiv Health Benefits to structure Section 125 supplemental arrangements that deliver free prescriptions and telehealth while reducing FICA costs.

• 3

  Draft the Written Plan Document

  Work with a benefits attorney, your payroll bureau, or a qualified benefits consultant to produce a compliant plan document before the plan year begins.

• 4

  Conduct Open Enrollment

  Notify eligible employees of the plan, available benefits, and contribution limits. Clearly communicate the irrevocability of elections and qualifying life events. For California employers, explicitly explain the state income tax distinction.

• 5

  Distribute the Summary Plan Description

  Deliver the SPD to all newly eligible employees within 90 days of eligibility.

• 6

  Configure Payroll Deductions

  Set up pre-tax deductions in your payroll system for each enrolled employee. AccuPay Systems manages this through the iSolved HCM platform — deductions flow from benefits enrollment directly into payroll without manual re-entry.

• 7

  Run Annual Nondiscrimination Testing

  Unless you qualify for the simple cafeteria plan safe harbor, conduct all three nondiscrimination tests each plan year.

• 8

  Review the Plan Document Annually

  Update contribution limits, amend for regulatory changes, and communicate updates to employees before the new plan year begins.

Common Section 125 Mistakes That Can Disqualify Your Plan

• No written plan document before the plan year begins. The most common disqualification trigger. Pre-tax deductions taken without a valid plan become retroactively taxable.
• S-corp shareholders with more than 2% ownership participating in the plan. Their deductions are not valid. Rank-and-file employees are unaffected.
• Mid-year election changes not authorized in the plan document. Even a genuinely sympathetic situation doesn’t permit a mid-year change unless the plan document specifically allows it and the change is consistent with the qualifying event.
• Skipping annual nondiscrimination testing. Plans that fail testing after the fact face retroactive tax consequences for highly compensated employees.
• Violating the Uniform Coverage Rule. Health FSA participants must have access to the full annual election from day one. Limiting reimbursements to amounts actually contributed is a plan failure.
• Not amending the plan document for new IRS limits. A document capping FSA contributions at $3,300 does not automatically permit $3,400 contributions in 2026. An amendment is required.
• Assuming California state taxes work the same as federal. They don’t. Employees enrolled in a Section 125 plan still owe California income tax on their full pre-deduction salary. Incorrect California withholding creates year-end surprises and potential employer liability.

How AccuPay Systems Administers Section 125 Plans

AccuPay Systems manages payroll and HR administration through the iSolved HCM platform, which handles the full Section 125 workflow in a single unified system:

• During open enrollment, employees make elections directly in the iSolved employee portal — with irrevocability rules enforced automatically.
• Elected pre-tax deductions flow into payroll without manual entry, eliminating the transcription errors that create W-2 misreporting.
• California state withholding is calculated on the correct gross wage amount, reflecting the Section 125 distinction between federal and California treatment.
• Year-end W-2 production reflects the correct pre-tax deduction coding across Boxes 1, 3, and 5.

For employers who want to add a supplemental Section 125 benefits layer, AccuPay coordinates with Optiv Health Benefits, whose supplemental plans are designed to integrate seamlessly with managed payroll environments. Optiv handles benefits design, employee enrollment, and ongoing plan administration. AccuPay handles payroll, pre-tax deduction configuration, and compliance — with no gaps between the two functions.

AccuPay’s work is backed by our 90-Day Double Money-Back Guarantee, more than 45 years of institutional payroll history, and a client retention record that includes our very first payroll client from 2006 — who remains with us today.

Frequently Asked Questions