Large employers subject to the employer shared responsibility penalty under the Affordable Care Act (ACA) that contribute to multiemployer plans will generally be protected from the penalty with respect to those full-time employees for whom the employer is required to contribute to the plan. We provide an overview of the employer penalty and then explore how contributing to a multiemployer plan protects the employer from the penalty and what information plan administrators should be providing to the plan’s contributing employers as these employers implement strategies to avoid the penalty and fulfill their reporting obligations under the ACA.