Employer-Sponsored Health Insurance: Structure, Costs, and Challenges

Employer-sponsored health insurance (ESI) remains the primary source of health coverage for United States residents under the age of 65. In 2025, approximately 60% of people in this age group, or about 165.6 million individuals, were covered through their employment.

Unlike many other nations, the United States relies on voluntary, private health insurance as the main coverage mechanism for residents who are not elderly, poor, or disabled. While providing insurance through the workplace is an efficient method for offering options to working families and is enhanced by tax benefits, the system often results in uneven coverage. This represents particularly evident for workers at smaller firms or those earning low wages.

Coverage Statistics and Methodology

The scale of ESI is highlighted by varying data sets. While general estimates place the number of covered individuals under age 65 at 165.6 million for 2025, a KFF analysis of the American Community Survey (ACS) identified 154 million people in this category.

The difference in these figures is due to the methodology used in the ACS analysis, where coverage is assigned using a hierarchy. This ensures that individuals reporting multiple types of insurance are counted under only a single category.

Historically, ESI has consistently been the largest form of health insurance in the U.S. In 2020, over 163 million Americans, representing 50% of the total U.S. Population, were covered by employer-provided insurance, either as employees or dependents.

Rising Costs and Employee Contributions

Recent data indicates a steady increase in the cost of maintaining these plans. According to the 2025 Employer Health Benefits Survey, which included 1,862 interviews with private and non-federal public firms, annual premiums for family health coverage reached $26,993 in 2025.

This figure represents a 6% increase compared to 2024. The financial burden is shared between employers and employees, with workers contributing an average of $6,850 toward the cost of family coverage in 2025.

Cost-sharing provisions also impact the affordability of care. For covered workers in plans that feature a general annual deductible, the average deductible for single coverage was $1,886 in 2025.

Systemic Risks and Vulnerabilities

The structure of tying health insurance to employment creates specific systemic risks. Research published in April 2022 noted that when job loss and health needs happen at the same time, individuals can become doubly vulnerable because they lose their insurance during a period of medical necessity.

Tying health insurance to employment can mean that when job loss and health needs occur simultaneously, such as during the COVID‐19 pandemic, people may be doubly vulnerable if they lose health insurance due to [job loss].

Health Services Research

This vulnerability affects a heterogeneous population, ranging from children and mid-career adults to those nearing retirement. Because the market structure impacts the generosity of insurance and out-of-pocket prices, it directly influences the financial well-being and access to care for over half of the U.S. Population.

Employer Trends and Benefit Shifts

Employers are currently facing significant challenges in keeping healthcare affordable as costs continue to soar, as noted in a November 17, 2025, National Survey of Employer-Sponsored Health Plans by Mercer.

Despite these cost pressures, some benefits are expanding. The 2025 KFF survey found that larger employers have increased coverage for GLP-1 agonists used for weight loss. Employers have been surveyed regarding their approaches to primary care and the provision of menopause support benefits.

Alternative Coverage Options

For those without ESI, there are other avenues to obtain private health insurance. Individuals may purchase coverage directly from an insurer, often utilizing an insurance agent or online platforms such as Healthcare.gov.

Under the Affordable Care Act (ACA), income-based premium assistance is available for this individual or non-group health insurance, providing an alternative for those not covered by an employer.