Your MEC Plan Eliminated One Penalty. It Left the Other One Wide Open.

A MEC plan satisfies an employee's individual coverage requirement and kills the Part A employer mandate penalty, but it does nothing for Part B penalty exposure. If any employee on a MEC-only plan buys subsidized coverage on the exchange, you're writing a check to the IRS.

What's the difference between MEC and Minimum Value?

They're not the same thing, and confusing them is expensive. Minimum Essential Coverage is a floor. It tells the government you offered something. The IRS defines Minimum Value as covering at least 60% of total allowed costs of benefits expected under the plan. MEC doesn't require that threshold. MV does.

A MEC plan with no hospital, no ER, and no Rx coverage is still MEC. It is almost certainly not MV. Those are two different designations with two different consequences.

Which ACA penalty does each designation actually eliminate?

The ACA employer mandate has two penalty tracks. Part A fires if you fail to offer MEC to at least 95% of full-time employees. Part B fires if you offer coverage that isn't affordable or doesn't provide minimum value, and an employee gets a subsidy on the exchange instead.

A MEC-only plan kills Part A. It does not kill Part B. Your penalty exposure on Part B is limited to the employees who actually purchase subsidized exchange coverage. That sounds manageable until you run the math on 200 people who can't afford your hospital-free plan and shop on healthcare.gov.

If you offered MEC, MV, and affordable coverage, your penalty exposure is zero. If you offered nothing, you're exposed on both tracks. MEC-only lands you in the middle. The middle is a real risk.

What benefits does a plan need to reach the 60% MV threshold?

There's no single required benefit list, but there are clear disqualifiers. IRS Notice 2014-69 states that a plan fails minimum value if it doesn't substantially cover inpatient hospitalization services or physician services. That guidance was issued in 2014 and it's still the controlling standard.

Some carriers built plans that hit 60% actuarial value on paper while excluding inpatient hospital coverage entirely. The IRS closed that gap directly. A plan skipping hospital coverage fails MV, period. For context, Bronze ACA marketplace plans sit between 58% and 62% actuarial value. That's essentially what the 60% MV floor mirrors. Your MEC-only plan is almost certainly below it.

How does an employer verify whether their plan provides minimum value?

For fully insured plans, your carrier handles the determination. For level-funded or self-funded arrangements, you're on your own. HHS built a Minimum Value Calculator specifically for this purpose. Employers with non-standard plan designs need an actuarial certification.

The IRS also allows safe harbor plan designs for self-funded sponsors. If you're running a custom MEC plan for a part-time or hourly population and nobody has run the MV calculator, that's a gap. Close it before open enrollment.

This matters most for employers offering MEC plans to specific employee classes, like part-time workers or seasonal staff, while offering full coverage to salaried employees. The plan design for the underserved class is what creates Part B exposure. See the 226-J penalty risk article for what that letter looks like when it arrives.

What happens to employees who are offered a non-MV plan?

Employees offered employer-sponsored coverage that doesn't reach minimum value are eligible for a Special Enrollment Period on the ACA marketplace. They can go buy subsidized coverage. When they do, the IRS gets notified through Form 1095-A. That notification triggers your Part B penalty review.

The per-employee Part B penalty is assessed monthly and applies to every full-time employee who receives a subsidy, not just the ones who enrolled in the MEC plan. That exposure grows as your workforce grows. It also compounds if your MEC plan has been in place for multiple plan years without a MV determination. The IRS can look back.

Also worth reviewing: how affordability thresholds interact with your contribution strategy. MV and affordability are two separate tests. Both have to pass.

What should employers with MEC-only plans do right now?

Pull the plan documents for every benefit offering in your population. If you have a class of employees on a MEC plan with no inpatient hospital or physician service coverage, assume it doesn't provide minimum value. Run the HHS MV calculator or get an actuarial certification if the plan design is non-standard.

Then decide whether the Part B penalty exposure is smaller or larger than the cost of upgrading that plan to meet MV and affordability. That's the actual math. Use the Benefits Blueprint tool to map your plan structure before the next renewal cycle.

MEC plans are a legitimate strategy for the right population and the right employer. They're not a penalty-free strategy. Knowing which penalty you eliminated and which one you kept is the difference between a deliberate decision and an expensive surprise.

Frequently asked questions

Does offering a MEC plan mean I have no ACA penalty exposure?

No. Offering MEC eliminates the Part A penalty for failure to offer coverage. It does not eliminate Part B penalty exposure. If any full-time employee receives a subsidized marketplace plan because your MEC plan doesn't meet Minimum Value or isn't affordable, you owe a Part B penalty for that employee. The only way to eliminate all penalty exposure is to offer coverage that meets MEC, Minimum Value, and ACA affordability requirements simultaneously.

What benefits must a plan include to meet Minimum Value under the ACA?

The IRS requires that a plan cover at least 60% of total allowed costs to meet Minimum Value. Per IRS Notice 2014-69, a plan automatically fails MV if it doesn't substantially cover inpatient hospitalization or physician services. There's no single list of required benefits beyond that, but excluding hospital and physician coverage is a disqualifier regardless of how other benefits are structured.

Can employees on a MEC-only plan get subsidies on the ACA marketplace?

Yes. Employees offered a plan that doesn't provide Minimum Value are eligible for a Special Enrollment Period and may qualify for premium tax credits on the public exchange. That subsidy triggers Part B penalty exposure for the employer. The employer doesn't have to know the employee switched. The IRS reconciles it through 1095 reporting at year-end.

How do I know if my self-funded or level-funded plan meets Minimum Value?

For self-funded and level-funded plans, the employer must independently verify MV status. HHS provides a Minimum Value Calculator for standard plan designs. Non-standard plans require an actuarial certification. Fully insured carriers handle this determination for their own products. If you haven't run either check, you don't actually know. Review your plan documents and consult your TPA or actuary before your next open enrollment. The Benefits Blake compliance resource hub has a reference guide on ACA employer mandate requirements.

What's the difference between MEC, Minimum Value, and Affordability?

These are three separate ACA tests. MEC is the baseline: you offered something. Minimum Value means the plan covers at least 60% of expected costs. Affordability means the employee's required contribution for self-only coverage doesn't exceed the IRS threshold for that plan year (10.22% of household income for 2027).

A plan must pass all three to fully protect an employer from ACA penalty exposure. Failing any one of the three leaves Part B exposure on the table.