Section 125 cafeteria plans are one of the most valuable tax-advantaged benefits employers offer, and also one of the most commonly administered incorrectly. The core idea is simple: let employees pay their share of insurance premiums and contribute to flexible spending accounts with pre-tax dollars, reducing taxable wages for both federal income tax and FICA. The execution is not simple. The IRS requires a written plan document, specific election timing, non-discrimination testing across multiple dimensions, and strict limits on mid-year changes. Plans that skip these requirements lose their tax-advantaged status for everyone enrolled, which turns a well-intentioned benefit into a payroll tax mess.
What Can Go Into a Cafeteria Plan Qualified benefits under Section 125 include employer-provided group health insurance, dental and vision coverage, health flexible spending accounts, dependent care FSAs, group-term life insurance up to $50,000, adoption assistance, and HSA contributions. Cash in lieu of benefits can also be offered.
Most benefits are not permitted inside a cafeteria plan: disability insurance, long-term care, scholarships, and meals or lodging don't qualify, even if they're otherwise valuable employee benefits.
The Written Plan Document Requirement The IRS requires a written plan document that specifies available benefits, eligibility rules, election procedures, maximum contributions, and compliance with Section 125. The document must be in place before any pre-tax contributions are taken.
An employer who runs pre-tax deductions without a compliant plan document loses the Section 125 tax treatment, and employees end up owing federal income tax and FICA on contributions they thought were pre-tax.
What Are the Non-Discrimination Tests? Three tests apply: an eligibility test, a contributions and benefits test, and a key employee concentration test. The tests ensure the plan doesn't favor highly compensated employees or key employees. Failing the tests means those employees lose the pre-tax treatment, though lower-paid employees keep it.
Mid-Year Election Changes Elections are locked in for the plan year, with exceptions only for qualifying events: marriage, divorce, birth or adoption of a child, loss of other coverage, or a significant change in cost or coverage of the plan. The change must be consistent with the event.
The 30 to 60 day election window is tight. Employees who miss the window wait until the next open enrollment.
Running a Flexible Benefit Plan Without Creating an IRS Problem Keep the plan document current. Section 125 regulations update periodically, and plan documents need to reflect each change. Work with an ERISA attorney or a qualified benefits administrator to update annually.
Run non-discrimination testing each year, usually at plan renewal or mid-year. Reference the IRS Publication 15-B for cafeteria plan rules and the DOL Employee Benefits Security Administration for ERISA overlay on certain cafeteria plan components. Link plan documentation to the broader employee handbook and coordinate with payroll to ensure pre-tax deductions flow correctly onto W-2s at year-end.
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