Association health plans (AHPs) have long been promoted as a vehicle to make health coverage more affordable for small businesses. At their core, AHPs allow small employers to band together through a bona fide association to purchase health insurance as a large group. That structural shift has a direct impact on small employer costs. It can reduce premiums for some firms, and it can also introduce financial and regulatory complexity that creates instability. Understanding the full picture requires looking beyond the headline savings and examining how AHPs affect rating rules, benefit design, and the broader risk pool.
How AHPs lower small employer costs in theory
The fundamental promise of an association health plan is that it gives a group of small businesses the purchasing power and regulatory treatment of a large employer. Large group plans benefit from several cost advantages that small groups (typically 1-50 or 1-100 employees, depending on the state) do not. When an AHP is structured as a single large group plan, it can unlock those advantages for its small employer members in the following ways:
- Economies of scale: A large, pooled group can negotiate lower administrative fees, reduce broker commissions as a percentage of premium, and spread fixed costs across more covered lives.
- Experience rating: Large group plans are typically experience-rated, meaning premiums are based on the actual claims history of the group rather than community-rated or age-rated small group premiums. A healthy AHP can use its favorable claims experience to secure lower rates.
- Exemption from state benefit mandates: Under certain legal frameworks, especially for AHPs governed by the Employee Retirement Income Security Act (ERISA) and deemed a single employer plan, the plan may not be subject to state-mandated benefits. Avoiding costly mandates like fertility treatment, autism therapy, or bariatric surgery can trim premiums in some states, though the size of that savings varies widely by state and benchmark plan.
- Exemption from small group rating rules: Small group market rules under the Affordable Care Act (ACA) require modified community rating, with premiums varying only by age (3:1 ratio), family size, geography, and tobacco use. AHPs that are reclassified as large groups can escape those caps and set rates based on factors like industry, gender, and health status, potentially lowering costs for younger, healthier businesses while raising them for others.
When these mechanisms work together, some small employers do see lower premiums. Consulting firm Avalere projected that, under the 2018 rule, annual AHP premiums could run $1,900 to $4,100 below average small-group premiums. The cost relief can be particularly meaningful for firms that have been priced out of offering coverage entirely.
The real-world impact on premiums and plan sustainability
Despite the theoretical savings, the actual impact on small employer costs is mixed and depends heavily on regulatory design and how a plan is implemented. Projections from the Congressional Budget Office and independent analysts offer concrete data points.
Potential savings for some, but not all
The Congressional Budget Office projected that roughly 4 million people would enroll in AHPs by 2023 under the 2018 rule, with about 90% of them moving from existing small-group or individual coverage and the rest newly insured. Avalere projected annual AHP premiums could run $1,900 to $4,100 below average small-group premiums. Those averages masked wide variation. Projected savings concentrated among employers with younger, healthier workforces and in high-premium states with many benefit mandates.
The risk of market segmentation and adverse selection
The same features that lower costs for AHP members can raise costs for small employers left in the ACA small group market. When an AHP draws away healthier groups, the remaining risk pool becomes sicker, pushing up premiums for non-AHP employers. CBO projected that, once the 2018 rule and the companion short-term plan rule took full effect, premiums in the fully regulated small-group and nongroup markets would run roughly 3% higher than they would have without the rules. Over time, that kind of segmentation can destabilize the small group market, leading to a spiral of rising rates and insurer exits.
Premium volatility and surprise gaps
Experience-rated AHPs are subject to sharp premium swings if the group's claims suddenly worsen. A small graphic design firm in an AHP full of similar businesses may enjoy low rates for years, then face a steep increase after a few members develop high-cost conditions. The cautionary history is real. A 1992 GAO report found failed association plans had left at least 398,000 participants with more than $123 million in unpaid claims. The Department of Labor later obtained a judgment requiring the Mississippi State Medical Association plan, which had more than 1,800 participants, to reimburse unpaid claims, and sued a Washington-state AHP serving 300 small employers over excessive administrative fees and concealed financial problems. Failures of this kind erase whatever premium savings an employer banked.
The regulatory dividing line: State vs. federal oversight
The impact of AHPs on costs depends heavily on which legal pathway the plan takes, and that pathway has shifted repeatedly. Under the 2018 final rule, the Department of Labor allowed sole proprietors and working owners to join AHPs and allowed broader associations, such as those based only on geography, to form large group plans. That rule projected the biggest savings because it sidestepped state small group insurance regulation.
In March 2019, a federal court in Washington, D.C. vacated key portions of the rule, finding the DOL had overreached in redefining “employer” and had run afoul of the ACA's market reforms. In April 2024, the DOL rescinded the rest of the 2018 rule outright, effective July 1, 2024, returning to its pre-2018 guidance. The result is that AHPs today operate as multiple employer welfare arrangements (MEWAs) subject to state regulation and, in many cases, small group rating rules. That mutes much of the cost differential. In states with strong insurance oversight, an AHP must offer the same essential health benefits, follow the same age rating bands, and accept all small employers regardless of health status, essentially mirroring the standard small group market. Savings in those states come mostly from administrative efficiencies rather than rating changes.
In a handful of states that have authorized broader AHPs or apply light-touch MEWA regulation, savings can still be larger, but consumer protections tend to be weaker. Small employers should evaluate whether a lower sticker price comes with thinner coverage, annual or lifetime limits, or the loss of pre-existing condition protections.
The 2025-2026 effort to revive AHPs
The regulatory question is not settled. In 2025, Congress took up the Association Health Plans Act (H.R. 2528 in the House, S. 1847 in the Senate), which would set new rules letting small employers and self-employed people form AHPs. CBO scored H.R. 2528 in December 2025, projecting the bill would add $4.4 billion to the deficit over 2026 to 2036 and that additional AHP enrollment would begin in 2027. A separate House bill, the Lower Health Care Premiums for All Americans Act (H.R. 6703), would also expand AHP enrollment, and CBO has said the two estimates are similar. The Labor Department is also proposing a new rule to expand AHPs, according to a September 2026 report. For a small employer weighing an AHP, the practical lesson is that the cost picture is moving again. Savings that depend on a particular federal interpretation can appear and disappear with each administration, so verifying a plan's regulatory standing matters before any enrollment decision.
Operational considerations and hidden costs for employers
Beyond the premium line, small employers should weigh several practical cost impacts that often go unmentioned in marketing materials:
- Compliance and fiduciary obligations: Participating in an AHP frequently makes the employer a fiduciary under ERISA, which carries legal responsibilities and potential liability. Employers may need to invest in additional compliance support or inadvertently expose themselves to lawsuits if the plan is mismanaged.
- Employee disruption: If the AHP uses a narrow network or a self-funded structure with out-of-state stop-loss, employees may lose access to their current doctors or face surprise bills. This can lead to employee dissatisfaction, turnover, or demands for higher wages to offset out-of-pocket costs, effectively raising total compensation costs.
- Plan termination risk: As some failed AHPs have demonstrated, if the association dissolves or the insurer departs, the small employer is left scrambling to find replacement coverage, often mid-year, at significantly higher rates.
Net impact: Who wins and who loses?
Summarized, the impact of association health plans on small employer costs is not monolithic. It creates winners and losers:
- Winners: Small employers in low-risk industries (tech, professional services) with young, healthy employees; employers in states with many benefit mandates; and those who can join large, well-established, well-governed associations with strong stop-loss coverage.
- Losers: Small employers in high-risk sectors (manufacturing, aging workforces); those who remain in the regulated small group market and face higher rates due to risk pool fragmentation; and employers who join poorly designed AHPs that later collapse or impose restrictive networks.
Association health plans can meaningfully lower upfront premium costs for some small employers, but those savings often come with trade-offs in coverage stability, benefit comprehensiveness, and market-wide cost shifts. For small business owners, the prudent approach is to demand full transparency: three years of audited financials, clear network and formulary details, and a legal assessment of the plan's regulatory standing. When those conditions are met, an AHP can be a viable cost-containment tool. Without them, what looks like a bargain may turn into a costly business risk.