SIMERP education and compliance resource center

Understanding SIMERP

A self-insured medical expense reimbursement plan, explained for employers, executives and their advisors: what it is, how it changes payroll tax, and the federal tax law it rests on, with a link to every source so you can read it in full.

What SIMERP is

In brief

SIMERP stands for self-insured medical expense reimbursement plan. It is a plan the employer sponsors itself, and it is not insurance. Employees make a pre-tax election under Section 125 of the Internal Revenue Code, and the plan reimburses medical care as defined in Section 213(d). Qualifying reimbursements are excluded from income and wages under Sections 105 and 106, so the election lowers the wages that payroll taxes are calculated on, for the employee and for the employer.

A note on the name. The IRS’s own wording omits the E. Treasury Regulation §1.105-11 and IRS Publication 15 use the phrase “self-insured medical reimbursement plan,” sometimes abbreviated SIMRP. Both abbreviations describe the same type of plan.

What it is, and what it is not

A SIMERP is

  • A self-insured medical reimbursement plan sponsored by the employer, under IRC Section 105.
  • Funded through a pre-tax employee election under IRC Section 125.
  • Limited to reimbursing medical care as defined in IRC Section 213(d).
  • Added alongside the benefits an employer already offers.

A SIMERP is not

  • Insurance.
  • A replacement for, or a change to, the group health plan.
  • A cash wellness payment made whether or not medical care occurs.
  • A change to employees’ gross pay.

The third point in the right-hand column is the one that matters most legally. The IRS has warned against arrangements that pay employees regardless of whether care happened. A properly designed reimbursement plan is a different instrument, and the Legal & Compliance section explains where Treasury Regulation §1.105-2 draws the line.

Lane one

Your CPA’s lane

This lane is covered

You hired them to keep your filings clean and your deductions defensible, and they do. A benefits program that reworks payroll was never part of that job.

The third lane

Tax lawBenefits lawHealthcare regulations

SIMERP operates here

Driving this lane takes all three bodies of law at once, and nobody on your advisor bench was ever hired to do it. That is the whole reason you have not heard of this.

Lane two

Your broker’s lane

This lane is covered

You hired them to find the right coverage at the right premium, and they do. A program that is not insurance never crosses their desk.

Why employers evaluate the structure

Employers look at a SIMERP for four reasons:

  • Payroll tax. Lower taxable wages mean the employer pays less in FICA tax on those dollars, every payroll after launch.
  • Employee take-home pay. Employees pay less federal, state, Social Security and Medicare tax. Part of that saving funds their healthcare membership; the rest stays in their paycheck.
  • Access to care. The plan is paired with medical care that employees can use, which is what the plan reimburses.
  • No change to what exists. The group health plan, broker, payroll provider and gross pay stay as they are.

Each of these depends on wages, enrollment and plan design. How It Works shows the arithmetic and its limits.

Why the structure is less familiar

A SIMERP sits where tax law, employee-benefits law and healthcare regulation meet. Tax advisors typically focus on compliance and deductions, and benefits brokers on insurance premiums, so a plan that is neither can fall between the two. The underlying provisions are not new: Sections 105, 106 and 213(d) date from the Internal Revenue Code of 1954, and Section 125 from 1978.

How it works, in brief

  1. Gross pay stays the same

    Nothing is cut and nothing is added to the paycheck.

  2. Employees elect pre-tax

    The election runs under Section 125, the same section behind health FSAs.

  3. Employee taxes fall

    Part of the saving funds the healthcare membership; the rest raises take-home pay.

  4. Employer FICA falls

    Lower taxable wages mean a lower employer FICA match.

The full mechanism, with the arithmetic

Employer and employee considerations

What each party should weigh
ConsiderationEmployerEmployee
MoneyFICA savings, net of program cost (illustration)Higher take-home pay after the membership fee (example)
CarePossible effect on group-plan claims, unquantified (details)Access to medical care through the plan (services)
CompliancePlan documents, substantiation, nondiscrimination (requirements)Reimbursements must be tied to actual medical care (substantiation)
EffortPlan documents, payroll setup and administration (implementation)A single pre-tax election

What changes, and what doesn’t

Stays the same

  • The existing group health insurance plan
  • The broker relationship
  • The payroll provider
  • Employees’ gross pay
  • Dental, vision and other benefits

Intended to change

  • Employer FICA payroll tax falls
  • Employee take-home pay rises
  • Employees gain access to medical care through EHP’s healthcare partner
  • The group plan’s claims experience may improveReview F9

The statutory basis, in brief

The structure rests on five sections of the Internal Revenue Code (105, 106, 125, 213(d) and 3121) and Treasury Regulation §1.105-2. IRS Publication 15 states that medical care reimbursements under an employer’s self-insured medical reimbursement plan are not wages for Social Security, Medicare and FUTA purposes.Review L12

Two separate questions

These provisions establish that the plan type exists and how qualifying reimbursements are treated. Whether a particular plan’s payments qualify depends on its design, substantiation, documentation and administration. A statute permitting a structure is not a determination that any specific implementation complies.

The full statutory reference table

Where to go next