A Cafeteria Plan’s Key-Employee Concentration Can Make Owner Benefits Taxable

Separate eligibility from plan-level testing

An owner employee may be eligible to participate in a cafeteria plan yet face taxable benefits because the plan favors key employees. Start by confirming that the person can participate under the applicable ownership rules. Then review the plan’s nondiscrimination requirements. The ability to elect a benefit and the ability to exclude it from income are related but separate determinations.

IRS Publication 15-B explains that a plan favors key employees when more than 25% of its total nontaxable benefits go to key employees, subject to the applicable rules. If the plan favors key employees, the publication directs inclusion in their wages of the value of taxable benefits they could have selected. The consequence should not be reduced to taxing only the amount by which the ratio exceeds 25%.

Calculate the concentration from the correct population

Assume the administrator has correctly identified the relevant benefits and key employees. The plan provides $100,000 of nontaxable benefits, including $30,000 for key employees and $70,000 for others. The key-employee concentration is 30%. It exceeds the general 25% threshold by five percentage points, but that five-point difference is not itself the taxable-wage amount.

If the company considers adding $20,000 of qualifying benefits for non-key employees, the assumed ratio becomes $30,000 divided by $120,000, or 25%. This arithmetic shows the potential effect on one test only. It does not establish that a retroactive payment is permissible, that every additional payment belongs in the denominator, or that the plan satisfies its other nondiscrimination requirements.

Obtain the actual testing method and permissible response from the administrator before changing elections or contributions. A year-end reimbursement invented solely to force a preferred percentage can conflict with plan terms and benefit rules. Model legitimate prospective design choices while preserving the actual historical test result.

Use the cafeteria-plan definitions

Identify key employees under the applicable section 416 framework and current-year guidance. Do not substitute the highly compensated employee definition used for a different medical or retirement test. Owner status, officer status, compensation, and relevant attribution can affect the population. Maintain the analysis rather than entering every manager into a key-employee column without review.

Publication 15-B separately describes cafeteria plans favoring highly compensated employees and the key-employee concentration rule. Passing the numeric concentration test does not prove that eligibility, contributions, and benefits are nondiscriminatory under every other applicable requirement. A self-insured medical plan can also have its own separate testing issues.

Preserve elections and obtain the actual taxable amount

Keep the written plan, participant census, ownership and officer information, elections, benefit values, employer contributions, salary reductions, and testing workpapers. Reconcile the testing totals to payroll and administrator records. Identify employees joining or leaving during the year, changes in ownership, and differences between elected and actually provided benefits. Give the reviewer the complete population and supporting transaction history rather than only the owners’ annual benefit totals. If the census changes after testing, determine whether the result must be recalculated before wage statements are finalized.

For an assumed owner whose taxable-benefit amount is properly determined as $8,000, an illustrative 32% federal rate creates a $2,560 income-tax sensitivity. That example assumes the $8,000 result has already been established; it does not calculate the inclusion from the plan’s aggregate concentration ratio. Employment-tax treatment and payroll reporting need their own supported review.

Choose a workable design and review cadence

Ask whether the employer qualifies for and wants to maintain a simple cafeteria plan meeting its specific eligibility, participation, and contribution requirements. Publication 15-B describes that framework as satisfying specified nondiscrimination requirements when its conditions are met. The label alone is insufficient, and it does not make an otherwise ineligible owner eligible.

Set an interim testing date early enough to evaluate lawful changes before the plan year ends. Assign responsibility for final results and payroll adjustments. This guide does not classify a particular employee or prescribe a correction. Its useful decision is to review the separate key-employee concentration test before promising the owner that cafeteria-plan benefits remain excluded. A supported census and test prevent the company from confusing a broadly advertised benefit with a plan that actually satisfies the relevant tax requirements.