15.1 ACA Essential Health Benefits and Metal Levels

Key Takeaways

  • The ACA requires individual and small-group plans to cover ten categories of Essential Health Benefits (EHBs) with no annual or lifetime dollar limits.
  • Metal levels (Bronze, Silver, Gold, Platinum) describe actuarial value (AV), not the quality of care or the number of benefits covered.
  • Actuarial value is the share of total covered costs the plan pays for a standard population: 60% Bronze, 70% Silver, 80% Gold, 90% Platinum (+/- 2% de minimis).
  • Preventive services from an in-network provider must be covered at 100% with no cost-sharing, even before the deductible is met.
  • Catastrophic plans are available only to enrollees under 30 or those with a hardship/affordability exemption.
Last updated: June 2026

ACA Essential Health Benefits and Metal Levels

The Patient Protection and Affordable Care Act (ACA), enacted in 2010, reshaped the individual and small-group health insurance markets. For the licensing exam, you must know what coverage every compliant plan must include (Essential Health Benefits) and how plans are tiered for comparison (metal levels). These rules apply to non-grandfathered individual and small-group plans, both on and off the Marketplace.

The Ten Essential Health Benefits (EHBs)

Every non-grandfathered individual and small-group plan must cover ten categories of Essential Health Benefits. Within the EHB categories, plans may not impose annual or lifetime dollar limits on coverage.

  • Ambulatory (outpatient) services
  • Emergency services
  • Hospitalization
  • Maternity and newborn care
  • Mental health and substance use disorder services, including behavioral health
  • Prescription drugs
  • Rehabilitative and habilitative services and devices
  • Laboratory services
  • Preventive and wellness services and chronic disease management
  • Pediatric services, including oral and vision care

Exam trap: A common distractor states that EHB plans cover "adult dental and vision." Pediatric dental and vision are EHBs; adult dental and vision are NOT required and are typically sold separately.

Grandfathered Plans and Annual/Lifetime Limits

Plans that existed before March 23, 2010 and have not materially changed are grandfathered and are exempt from some EHB rules. Once an insurer significantly cuts benefits or raises cost-sharing beyond set thresholds, the plan loses grandfathered status and must comply with full ACA requirements.

For all compliant plans, two limits are abolished within the EHB categories:

  • No lifetime dollar limits on essential benefits.
  • No annual dollar limits on essential benefits.

Insurers may still apply non-dollar limits such as visit caps on a non-essential service, but they cannot cap the dollar value of an EHB. This guarantees that catastrophic, high-cost claims (such as a long cancer treatment) cannot exhaust a member's coverage.

Preventive Services and Cost-Sharing

A cornerstone of the ACA is first-dollar preventive coverage. Recommended preventive services from an in-network provider must be covered at 100% with no cost-sharing -- no copay, no coinsurance, and no application of the deductible. Examples include immunizations, certain cancer screenings, blood-pressure screening, and well-woman visits.

Key distinction: The zero-cost rule applies only in-network. If the insured uses an out-of-network provider, normal cost-sharing may apply.

Metal Levels and Actuarial Value

Qualified plans are grouped into four metal levels based on actuarial value (AV) -- the percentage of total covered medical costs the plan is expected to pay for a standard population. A higher metal level means higher premiums but lower out-of-pocket costs.

Metal LevelActuarial ValuePlan Pays / Insured Pays
Bronze60%Plan 60% / Insured 40%
Silver70%Plan 70% / Insured 30%
Gold80%Plan 80% / Insured 20%
Platinum90%Plan 90% / Insured 10%

A de minimis variation of +/- 2 percentage points is permitted (for example, a Silver plan may range roughly 66%-72% AV). Crucially, AV describes the division of costs, not the breadth of benefits -- a Bronze and a Platinum plan cover the same ten EHBs; they differ in how much the enrollee pays at the point of service.

Reading the trade-off

When advising a client, frame the metal level as a budgeting choice. A healthy enrollee who expects few claims may prefer a Bronze plan: low premium, high deductible, and the protection of the ACA's out-of-pocket maximum if a catastrophe occurs. A client with a chronic condition who expects frequent care typically saves money overall with Gold or Platinum, because the higher premium is offset by far lower cost-sharing on each visit, prescription, and procedure.

The annual out-of-pocket maximum caps total cost-sharing across all metal levels, after which the plan pays 100% of covered, in-network EHBs for the rest of the year. This cap is one of the strongest consumer protections the ACA added to the individual market.

Ten EHBs and the Actuarial-Value Tiers

The ACA requires non-grandfathered individual and small-group plans to cover ten Essential Health Benefits (EHBs) with no annual or lifetime dollar limits:

Essential Health Benefits
Ambulatory (outpatient) care; emergency services; hospitalization
Maternity and newborn care; mental health and substance-use disorder
Prescription drugs; rehabilitative and habilitative services/devices
Laboratory services; preventive/wellness and chronic-disease management
Pediatric services, including dental and vision

Metal tiers describe actuarial value (AV) — the share of total covered costs the plan pays on average:

TierPlan pays (AV)Insured pays
Bronze~60%~40%
Silver~70%~30%
Gold~80%~20%
Platinum~90%~10%

Worked logic: a Bronze plan has the lowest premium but the highest cost-sharing (high deductible), while Platinum flips that. Catastrophic plans exist for those under 30 or with hardship exemptions, covering EHBs only after a high deductible plus three primary-care visits. Cost-sharing reduction subsidies (next section) only attach to Silver plans, which is why Silver is strategically important on the Marketplace. Preventive services on the EHB list must be covered first-dollar (no cost-sharing) when delivered in network.

Test Your Knowledge

An applicant compares a Bronze and a Gold plan from the same insurer. Which statement is correct?

A
B
C
D

Catastrophic Plans

A fifth plan type, the catastrophic plan, sits below Bronze. It carries very low premiums and high deductibles (set at the annual out-of-pocket maximum), but it still covers the ten EHBs and at least three primary-care visits plus preventive services before the deductible.

Eligibility is restricted: Catastrophic plans may be purchased only by individuals under age 30, or by those who qualify for a hardship or affordability exemption (e.g., the lowest-cost available plan exceeds a set percentage of household income). Catastrophic plans are not eligible for premium tax credits.

Worked comparison

Suppose a standard population incurs $10,000 in covered claims.

  • Under a Bronze plan (60% AV), the plan is expected to pay about $6,000; the enrollee bears roughly $4,000.
  • Under a Platinum plan (90% AV), the plan pays about $9,000; the enrollee bears roughly $1,000.

The Platinum enrollee pays far less at the point of care but funds that protection through a substantially higher monthly premium. This trade-off -- premium versus out-of-pocket exposure -- is the central decision when selecting a metal level.

Test Your Knowledge

Which individual is eligible to enroll in a catastrophic plan?

A
B
C
D