Identify the reimbursement arrangement
A C corporation may want to reimburse a founder’s medical expenses that insurance does not cover. The owner’s employee status does not by itself settle whether every reimbursement is excluded from income. Begin with the written arrangement, eligible employees, covered expenses and benefit limits. Determine whether the arrangement is a self-insured medical reimbursement plan and whether it favors highly compensated individuals under the applicable rules. The decision concerns the plan’s design and operation, not simply whether the medical bill is genuine.
Internal Revenue Code section 105(h) addresses discriminatory self-insured medical reimbursement plans. IRS Publication 15-B explains related wage reporting for affected highly compensated employees. A plan can therefore reimburse a real medical expense while still producing taxable income for the owner because of its eligibility or benefit design.
Compare the owner illustration with the employee population
Suppose a corporation has one founder employee and eight other employees. A proposed plan reimburses the founder up to $15,000 annually and gives the others no access to the arrangement. The founder’s maximum projected benefit is $15,000, but the company has not yet established an exclusion merely by budgeting that amount. The employee census and nondiscrimination analysis must be completed before the benefit is represented as tax free.
For cash planning, assume the founder receives $10,000 of reimbursements that are ultimately includible in income and faces an illustrative 24% ordinary tax rate. The resulting personal income-tax cost is $2,400 under those assumptions. Payroll-tax and withholding treatment requires the applicable specific rules and should not be inferred from that income-tax example. The arithmetic shows why a promised $10,000 tax-free benefit and a $10,000 taxable reimbursement are different compensation outcomes.
Build the census and benefit comparison
Collect employee ages, service, employment status, compensation and ownership information needed for the applicable tests. Identify permitted exclusions using the actual rules rather than excluding employees because the founder considers them temporary or unimportant. Compare both eligibility and available benefits. A plan that nominally admits employees but gives the founder a much larger reimbursement opportunity can raise a different issue from a plan that excludes employees entirely.
Have the administrator document the test method, data date and conclusions. Preserve the actual plan terms used in the analysis. If employee turnover changes the census, determine whether the test must be refreshed. A result based on a one-person company may not remain relevant after the business hires a team. The owner should not continue using the original illustration without examining the current population.
Coordinate claims and payroll without exposing medical details
Set a substantiation process for reimbursable medical expenses and identify who reviews claims. Keep sensitive medical information outside the ordinary payroll folder where practical. Payroll may need the taxable amount and reporting instruction rather than diagnoses or detailed treatment records. A reimbursement should be linked to a valid claim and the plan terms, with duplicate-payment checks against insurance or other reimbursement sources.
If the nondiscrimination review produces taxable amounts, give payroll a written instruction distinguishing the relevant income and employment-tax treatment. Do not use a generic bonus code without checking whether it applies all taxes correctly. Conversely, do not omit an income inclusion merely because the employer’s tax rules differ from ordinary cash wages. The reporting file should explain the rule used and the affected amount.
Approve the design with its full cost
Compare a compliant broader benefit design, an insured coverage option and taxable additional compensation using the employee population and administrative costs. The founder’s preferred medical budget is only one input. A company may choose a different benefit after seeing the cost of making terms available to other eligible employees. Record the final design, effective date and communication plan before reimbursing claims under a proposal that has not been adopted.
This article does not determine that a particular plan fails, calculate every excess reimbursement or resolve all health-plan market requirements. It also does not extend C corporation employee treatment to partners or more-than-2% S corporation shareholders. The useful decision is to test the actual self-insured arrangement before promising an excluded founder benefit and to connect that conclusion to claim administration and payroll reporting.
Sources & further reading
Consult the original guidance and its effective dates. These references support the educational discussion; their application depends on the specific facts.