What Is Affordable Coverage?

Affordable Coverage under the Affordable Care Act (ACA) refers to a regulatory standard that determines whether an employer’s health insurance offering meets the affordability threshold set by federal law. This concept is particularly relevant for employers with 50 or more full-time equivalent employees (Applicable Large Employers, or ALEs) who are subject to the ACA’s employer mandate. The affordability requirement is tied to the employee’s household income and is used to evaluate whether an employer may be subject to penalties for failing to offer coverage that is affordable and provides minimum value.

The Internal Revenue Service (IRS) defines and updates the affordability percentage each year. This figure determines the maximum amount an employee can be required to contribute toward the cost of self-only coverage under the lowest-cost plan offered by the employer. If an employee’s required contribution exceeds this percentage of household income, the coverage is deemed unaffordable, which may trigger employer penalties if that employee obtains subsidized coverage through a Health Insurance Marketplace.

Legal Foundation

The affordability requirement originates from Section 4980H(b) of the Internal Revenue Code, as established by the ACA. The law requires that employers not only offer coverage to full-time employees and their dependents but also that such coverage be affordable. Failing to meet the affordability standard may lead to a shared responsibility payment (penalty) if a full-time employee purchases a qualified health plan through the Marketplace and receives a premium tax credit.

Each year, the IRS sets an affordability percentage limit that applies to employer-sponsored health plans. This limit is based on the federal poverty level (FPL) and can be applied using one of three affordability safe harbors to help employers determine compliance: the Form W-2, Rate of Pay, and Federal Poverty Line safe harbors.

Annual Affordability Threshold

The affordability percentage is not static; it is indexed annually and has varied between 8.05% and 9.83% since the ACA was implemented. The IRS releases updated guidance on the applicable percentage for the following plan year, typically published in a revenue procedure or IRS notice.

For example, for the 2024 tax year, the affordability threshold was set at 8.39%. This means that an employer’s health plan must not require an employee to contribute more than 8.39% of their household income toward the cost of the lowest-cost self-only plan offering minimum essential coverage.

Household Income and Affordability

Affordability is determined based on the employee’s household income. However, because employers do not have access to complete household income information, the IRS provides the aforementioned safe harbor methods to allow employers to make reasonable assumptions.

• W-2 Safe Harbor: The employer looks at the employee’s Box 1 wages on their W-2 form for the year.
• Rate of Pay Safe Harbor: The employer multiplies an employee’s hourly wage rate by 130 hours per month (for hourly workers) or uses the monthly salary for salaried employees.
• Federal Poverty Line Safe Harbor: This method compares the employee contribution to a percentage of the FPL for a single individual.

If any of these safe harbors indicate affordability under the set threshold, the employer is considered to have met the requirement, even if the employee's actual household income is higher or lower.

Impact on Employers and Employees

For employers, failing to meet the affordability requirement can lead to significant financial penalties. Under IRC §4980H(b), if a full-time employee is offered coverage that is not affordable and instead enrolls in a subsidized Marketplace plan, the employer may face a penalty for each such employee. The penalties are adjusted annually and can amount to thousands of dollars per affected employee.

For employees, affordable coverage under the ACA has a direct impact on eligibility for premium tax credits. If employer-sponsored coverage is deemed affordable and meets minimum value, the employee is not eligible for subsidies through the Marketplace, even if their income would otherwise qualify them for assistance.

It’s important to note that affordability is measured only for self-only coverage. An employer plan may require higher contributions for dependent or family coverage without violating the affordability standard, though this has been a subject of policy debate and revision proposals.

Policy and Regulatory Considerations

The concept of Affordable Coverage is central to the ACA’s framework for shared responsibility between employers, employees, and the government. It aims to ensure that employer-sponsored insurance remains accessible and that employees are not overburdened by premium costs. However, gaps in coverage affordability, especially for family members, have led to what is commonly called the "family glitch." This occurs when an employee’s coverage is affordable under ACA guidelines, but family coverage is not, leaving dependents without access to subsidized insurance. In 2023, the federal government issued a final rule to address this issue and expand eligibility for subsidies to certain family members.

In practice, compliance with the affordability standard requires careful tracking of employee hours, contributions, plan offerings, and periodic IRS updates. Employers must align their health benefit strategies accordingly to avoid penalties and support employee access to care.

The Bottom Line

Affordable Coverage under the ACA is a legal standard that determines whether an employer’s health plan is reasonably priced for full-time employees based on income thresholds set by the IRS. It is a central part of the ACA’s employer mandate and plays a significant role in determining eligibility for subsidies in the individual Marketplace. Employers must use safe harbor rules to assess affordability and update contribution strategies annually based on the IRS affordability percentage. Ensuring compliance not only avoids penalties but also supports the broader goals of healthcare access and affordability.