Employer Medical Loss Ratio Rebate: Distribution, Deadlines, Taxes

When a rebate check arrives from your health insurer under the Affordable Care Act’s Medical Loss Ratio rule, the employer medical loss ratio rebate rules treat any portion tied to employee premium contributions as an ERISA plan asset. That means part of the money isn’t yours to keep. You have to calculate what share belongs to employees, get it to them within three months, and handle the tax reporting based on how premiums were originally paid. Skip any of those steps and you’re looking at fiduciary liability, IRS penalties, or both.

Does the Rule Apply to Your Plan

The MLR rebate requirement only reaches fully insured group health plans, where the employer pays premiums to a carrier that assumes the claims risk. Self-insured plans, where the employer pays claims directly and usually contracts a third-party administrator, aren’t subject to the MLR rule. About two-thirds of covered workers sit in self-funded arrangements, so most employers never see one of these checks. If your plan is self-funded, nothing below applies.

Calculating the Employee Share

The check comes made out to the employer, but the employer doesn’t own all of it. Under the Department of Labor’s Technical Release 2011-04, whatever portion of the rebate corresponds to employee premium contributions is a plan asset under ERISA, and plan assets must be used for the exclusive benefit of participants and beneficiaries.{¹}

The math is proportional. Pull the premium split for the calendar year the rebate covers. If the company paid 70% of premiums and employees paid 30% through payroll deductions, then 30% of the rebate belongs to the employees. Work from actual payroll records and billing statements rather than estimates, because the allocation has to hold up if it’s ever questioned.

One scenario lets the employer keep everything: if the employer paid 100% of premiums and employees contributed nothing, no part of the rebate is attributable to employee contributions and the employer can retain it in full, unless plan documents say otherwise.{¹}

How to Distribute the Employee Share

Once you know the employee share, pick a delivery method. Three approaches are standard.

A premium holiday, reducing payroll deductions for health coverage over one or more pay periods until the rebate amount is exhausted. This is the most common route because it avoids cutting individual checks and runs through existing payroll infrastructure.
A cash payment, issuing a check or direct deposit to each qualifying participant for their share. More administrative work, but some employers prefer the transparency.
A benefit enhancement, applying the funds toward improving the plan itself, such as reducing co-pays or adding a wellness benefit. This works when per-person amounts are too small to distribute meaningfully as cash.

Whichever method you pick, the total value delivered to participants has to equal the calculated employee share. You can’t absorb a $10,000 employee share by pointing to a $3,000 wellness upgrade and pocketing the rest.

Deadlines You Need to Track

Insurers must issue rebate payments no later than September 30 of the year following the MLR reporting period.{²} For a plan year ending December 31, 2025, expect your carrier’s check by September 30, 2026, at the latest.

Once the money arrives, ERISA plan administrators have three months to get it to participants. The DOL treats the rebate like any other plan asset in the employer’s hands and expects it distributed or applied within that window.{¹} Most employees see the impact as reduced payroll deductions or a payment by late fall or early winter.

Former Employees and Small Amounts

A common question: do former employees who were enrolled during the rebate year get a share? The DOL gives employers some discretion. You may run a cost-benefit analysis and exclude former participants if the hard administrative costs of reaching them (printing checks, postage, handling) exceed the individual rebate amount. Note the phrase: hard costs. Time spent tracking down a former employee’s address doesn’t count as a cost that justifies skipping them.

For current employees, there’s no such exception. Every current participant who contributed premiums during the relevant year must receive their proportional share, no matter how small.

Insurers have their own de minimis threshold, and are not required to issue rebates below $20 per subscriber, or $5 if paid directly to an individual enrollee. But that only limits the insurer’s obligation. Once you’ve received the check, your duty to distribute the employee share kicks in with no minimum dollar exception.

Tax Treatment

How the rebate is taxed depends entirely on how the original premiums were paid. Most employer-sponsored plans use a Section 125 cafeteria plan, where premiums come out of the paycheck pre-tax. If that’s your setup, the rebate is taxable. The IRS treats it as a return of compensation that was never taxed in the first place, so when the money comes back it becomes taxable income subject to federal income tax and to Social Security and Medicare. The amount must appear on the employee’s W-2.{³}

If employees paid premiums with after-tax dollars, the rebate is just a purchase-price adjustment. The IRS views it as a partial refund of money already taxed, so it isn’t taxable income and isn’t subject to employment taxes.{³} The employee doesn’t report it. The same treatment applies whether the rebate arrives as a premium reduction or a cash payment.

Government and Church Plans

ERISA doesn’t reach every employer plan. State and local government plans and church plans follow HHS rules instead. For these, the employer must use the rebate one of three ways: reduce next year’s premiums for all participants across the employer’s group plans, reduce premiums only for participants in the specific plan that triggered the rebate, or issue a cash refund to those participants.

Church plans get the same three options, but only if the church certifies to the insurer that it will distribute the rebate accordingly. Without that certification, the insurer must pay the entire rebate, employer and employee shares alike, directly to the individual participants.

Across plan types, when employees contribute toward premiums, the rebate has to be split between employer and employees based on their relative share. You can divide the employee portion evenly among all qualifying employees or base it on each person’s actual contribution. There’s no requirement to prorate for employees enrolled only part of the year or who switched tiers.

What Happens If You Mishandle It

The most common mistake is treating the whole rebate as company money. When employees contributed to premiums, their share is a plan asset under ERISA, and using it for anything other than participant benefit is a fiduciary breach. Not a gray area, and the consequences are personal.

Under ERISA Section 409, a fiduciary who breaches their duties is personally liable to make the plan whole for any losses and must return any profits earned by misusing plan assets. Courts can also remove the fiduciary from the role.{⁴} On top of recovery, the DOL can impose a civil penalty equal to 20% of any amount recovered from the breaching fiduciary by settlement or court order.{⁵}

On the tax side, failing to report a taxable rebate on an employee’s W-2 can trigger IRS accuracy-related penalties of 20% of the resulting underpayment, plus interest until it’s paid.{⁶} Per-employee exposure looks small, but aggregated across a workforce it adds up. The check may feel like found money. The obligations attached to it are the kind that create real problems when ignored.

1
U.S. Department of Labor. Technical Release 2011-04 – Guidance on Rebates for Group Health Plans Paid Pursuant to the Medical Loss Ratio Requirements of the Public Health Service Act
2
eCFR. 45 CFR 158.240 – Rebating Premium if the Applicable Medical Loss Ratio Standard Is Not Met
3
Internal Revenue Service. Medical Loss Ratio (MLR) FAQs
4
Office of the Law Revision Counsel. 29 U.S. Code 1109 – Liability for Breach of Fiduciary Duty
5
Office of the Law Revision Counsel. 29 U.S. Code 1132 – Civil Enforcement
6
Internal Revenue Service. Accuracy-Related Penalty