Understanding Actuarial Value: The Percentage Behind Every Metal Tier
Key Takeaways
- Actuarial value tells you what percentage of average medical costs your plan pays — not what you pay in premiums.
- Bronze plans carry a 60% AV, Silver 70%, Gold 80%, and Platinum 90% — these are the four ACA metal tiers.
- A higher actuarial value means lower out-of-pocket costs when you use care, but typically higher monthly premiums.
- Actuarial value is calculated on an average population, so your personal costs may differ significantly from the stated percentage.
- Silver plans are unique because Cost-Sharing Reductions (CSRs) can raise their actuarial value up to 94% for eligible enrollees.
- Understanding AV helps you estimate true annual costs, not just compare premium sticker prices.
Actuarial Value (AV)
Actuarial value is a percentage that tells you how much of the average enrollee's total medical costs a health insurance plan pays. For example, a plan with a 70% actuarial value covers 70 cents of every dollar of typical healthcare expenses — and you cover the remaining 30 cents through deductibles, copays, and coinsurance. It's a standardized way to compare how generous different plans are before you enroll.
The AV calculation is based on a standardized population of enrollees and a fixed set of covered benefits defined by the ACA, so individual results will vary based on actual utilization.
Why One Number Can Summarize an Entire Health Plan
When you compare health insurance plans, you're staring at a wall of numbers: premiums, deductibles, copays, coinsurance rates, out-of-pocket maximums. It's overwhelming. Actuarial value exists to collapse all of that complexity into a single, comparable figure.
Think of it this way: instead of trying to mentally calculate what a $1,500 deductible plus 20% coinsurance plus $35 copays adds up to over a year, actuarial value does that math for you — using a standardized population — and hands you a percentage. That percentage is the plan's share of average total costs.
This is the foundation behind the ACA's metal tier system. The four tiers — Bronze, Silver, Gold, and Platinum — aren't just marketing labels. Each one is anchored to a specific actuarial value range. Understanding how AV works gives you the lens you need to evaluate any health plan honestly, whether it's a marketplace plan or an employer-sponsored option.
Before we go deeper, let's be clear about what AV does not tell you. It doesn't tell you what your premium will be. It doesn't tell you which specific services are covered. And it doesn't predict your personal out-of-pocket spending. What it does tell you is how generously the plan is designed, on average, across a broad pool of enrollees.
How Actuarial Value Is Actually Calculated
The Centers for Medicare & Medicaid Services (CMS) uses a standardized methodology to calculate AV. Here's the basic framework:
- Start with a standard population: CMS uses a hypothetical group of enrollees with a defined mix of ages, health conditions, and service utilization patterns. This is the same baseline for every plan being evaluated.
- Apply the plan's cost-sharing rules: For that standard population, the model runs through every covered service — doctor visits, hospitalizations, prescriptions, labs, imaging — and applies the plan's specific deductible, copays, coinsurance, and out-of-pocket maximum.
- Calculate the plan's share: The model totals what the plan pays versus what enrollees pay out of pocket. The plan's share, expressed as a percentage of total costs, is the actuarial value.
Two plans can have identical actuarial values while being structured very differently. One might achieve 70% AV through a low deductible and high coinsurance. Another might get to the same 70% through a high deductible but generous copays after that deductible. Same number, very different experience — which is why you still need to look beyond the AV percentage when choosing a plan.
60%
Actuarial value of a Bronze plan
Under ACA rules, Bronze plans must cover approximately 60% of average enrollee medical costs, leaving 40% as enrollee cost-sharing.
94%
Max Silver AV with CSRs
Silver plan enrollees earning 100%–150% of the federal poverty level can receive Cost-Sharing Reductions that push their effective actuarial value to approximately 94%.
±2%
Allowable AV de minimis variation
The ACA permits plans to deviate up to 2 percentage points from their target tier AV and still qualify for that metal tier designation.
70%
Standard Silver plan actuarial value
Without Cost-Sharing Reductions, a Silver marketplace plan covers approximately 70% of average enrollee healthcare costs.
~40%
Average Bronze enrollee out-of-pocket share
On average, Bronze plan enrollees pay roughly 40 cents of every dollar in healthcare costs through deductibles, copays, and coinsurance.
For the purposes of ACA compliance, plans are allowed a ±2 percentage point de minimis variation around their target AV. So a Silver plan might have an actual AV anywhere from 68% to 72% and still qualify as Silver-tier. This is a small but important nuance when comparing plans within the same tier.
Same AV, Different Plan Structure
Two plans with identical actuarial values can have very different structures. One might feature a $500 deductible with 30% coinsurance; another might have a $3,000 deductible with $20 copays after that. The AV number is the same, but your experience using each plan could differ dramatically depending on when and how you access care. Always review the Summary of Benefits and Coverage for plan-specific details.
AV Applies Only to Covered Benefits
Actuarial value is calculated only on services the plan covers. If a service isn't covered at all — say, a specific therapy or out-of-network procedure — those costs don't factor into the AV calculation and you're responsible for 100% of them. Always check the plan's covered benefits list separately from its AV percentage.
Employer Plans and AV
While the ACA metal tier labels apply specifically to individual and small-group marketplace plans, many large employer-sponsored plans also calculate actuarial value for internal benchmarking and compliance purposes (particularly for minimum value determinations under the ACA's employer mandate). If your employer plan has at least a 60% AV, it meets the federal minimum value standard.
The Four Metal Tiers and Their Actuarial Values
Here's the direct mapping between metal tiers and actuarial values under the Affordable Care Act:
| Metal Tier | Actuarial Value | Your Average Share |
|---|---|---|
| Bronze | ~60% | ~40% |
| Silver | ~70% | ~30% |
| Gold | ~80% | ~20% |
| Platinum | ~90% | ~10% |
For a detailed breakdown of how each tier affects your premiums and deductibles in practice, see our guide on what the metal tiers actually tell you about cost.
There's also a fifth tier — Catastrophic — available only to people under 30 or those with certain hardship exemptions. Catastrophic plans have an AV well below 60%. They cover three primary care visits per year before the deductible, but otherwise you pay full costs until you hit the out-of-pocket maximum.
Always Check the Out-of-Pocket Maximum
Actuarial value gives you the average picture, but the out-of-pocket maximum is your worst-case ceiling. Even a Bronze plan caps your exposure — once you hit that limit, the plan pays 100% of covered costs for the rest of the year. Make sure you could handle the OOP max before choosing a lower AV plan.
If You Qualify for CSRs, Pick Silver Every Time
Cost-Sharing Reductions are only available on Silver plans, and they can push your effective actuarial value to 87% or even 94%. If your income qualifies, a Silver plan with CSRs almost always delivers better value than a Gold or Platinum plan at the same or lower premium cost.
Run the Full Annual Cost, Not Just the Monthly Premium
Add your monthly premium multiplied by 12 to your estimated out-of-pocket costs based on the plan's AV. That total annual cost number is what you should compare across plans — not just the premium line. A $50/month premium savings can easily be wiped out by higher cost-sharing on a lower AV plan if you use moderate amounts of care.
The trade-off across tiers is straightforward: as AV rises, your premium rises but your cost exposure when you actually use care falls. The question of which tier suits you best depends on how frequently you use healthcare, your financial ability to absorb unexpected costs, and whether you qualify for subsidies.
For a broader look at how the tiers are structured and what they signal about a plan's design, see decoding the metal tiers.
The Silver Plan Exception: Cost-Sharing Reductions
Silver plans occupy a special position in the ACA marketplace. While a standard Silver plan has a 70% AV, Silver is the only tier through which Cost-Sharing Reductions (CSRs) are delivered — and CSRs can dramatically change that number.
If your household income falls between 100% and 250% of the federal poverty level (FPL), you may qualify for CSRs when you enroll in a Silver plan. These reductions lower your deductible, copays, and out-of-pocket maximum, which means the plan picks up a larger share of your costs.
| Income Level (% of FPL) | Effective Silver AV |
|---|---|
| 201%–250% | ~73% |
| 151%–200% | ~87% |
| 100%–150% | ~94% |
That's a Silver plan performing at near-Platinum levels for eligible low-income enrollees — without paying Platinum premiums. If you qualify for CSRs, choosing Silver is almost always the right call financially. Your premium tax credit works the same way regardless of the tier you choose, but CSRs are only available on Silver plans.
This is one area where the sticker AV on a plan summary can be misleading. Two Silver plans may both say 70% on paper, but one enrollee might effectively have a 94% AV plan due to CSRs. For a deeper look at how AV translates to real spending, see what actuarial value really means for your out-of-pocket costs.
“Actuarial value is the most underused tool in consumer health insurance decision-making. Most people compare premiums and stop there — but AV tells you what the plan actually does when you get sick, which is the only moment that truly matters.”
— Karen Pollitz, Senior Fellow, KFF (Kaiser Family Foundation), Health Insurance Policy Research
Using Actuarial Value to Estimate Your True Annual Cost
Here's where AV becomes a practical decision-making tool. Follow this step-by-step process to compare plans beyond the premium line:
Step 1: Estimate your total healthcare spending
Look at your last two years of medical expenses — doctor visits, prescriptions, procedures, lab work. Add them up and compute an annual average. Be honest: if you're planning a surgery or managing a chronic condition, factor that in.
Step 2: Apply the actuarial value
Multiply your estimated healthcare spending by (1 minus the plan's AV). That's roughly your expected out-of-pocket cost for care.
- Example: $8,000 in estimated medical costs on a Bronze plan (60% AV) → You pay roughly $3,200
- Same costs on a Gold plan (80% AV) → You pay roughly $1,600
Step 3: Add your annual premium
Multiply your monthly premium by 12 and add it to your estimated out-of-pocket costs. This gives you a total annual cost estimate for each plan.
Step 4: Compare total annual costs across tiers
Don't just compare premiums. The plan with the lowest premium may cost you significantly more overall if you use a moderate amount of healthcare. AV is the shortcut to seeing that trade-off clearly.
Always Check the Out-of-Pocket Maximum
Actuarial value gives you the average picture, but the out-of-pocket maximum is your worst-case ceiling. Even a Bronze plan caps your exposure — once you hit that limit, the plan pays 100% of covered costs for the rest of the year. Make sure you could handle the OOP max before choosing a lower AV plan.
If You Qualify for CSRs, Pick Silver Every Time
Cost-Sharing Reductions are only available on Silver plans, and they can push your effective actuarial value to 87% or even 94%. If your income qualifies, a Silver plan with CSRs almost always delivers better value than a Gold or Platinum plan at the same or lower premium cost.
Run the Full Annual Cost, Not Just the Monthly Premium
Add your monthly premium multiplied by 12 to your estimated out-of-pocket costs based on the plan's AV. That total annual cost number is what you should compare across plans — not just the premium line. A $50/month premium savings can easily be wiped out by higher cost-sharing on a lower AV plan if you use moderate amounts of care.
Remember that the AV calculation doesn't cap at the out-of-pocket maximum automatically in your estimate — but you should note each plan's OOP max as a worst-case scenario. If your costs were catastrophic, you'd stop paying at that ceiling regardless of AV.
Understanding how premiums are constructed in the first place can also sharpen your comparison. Our guide on what goes into your insurance premium walks through the factors insurers weigh when pricing your plan.
What Actuarial Value Doesn't Tell You
Actuarial value is a powerful tool, but it has real limitations you should understand before leaning on it too heavily.
It's based on an average person, not you
The standard population used in AV calculations is a blend. If you have a chronic illness requiring frequent specialist visits and high-cost medications, your actual cost-sharing experience could be far better than the AV implies — because the plan absorbs a large share of your higher-than-average bills. Conversely, if you're rarely sick, your out-of-pocket percentage may be higher than the AV because most of your spending is a premium you paid for coverage you didn't use much.
It doesn't reflect network or care quality
A plan with 80% AV means nothing if your preferred hospital is out of network. AV measures cost-sharing generosity, not access or quality. Always check network adequacy separately.
It doesn't account for specific drug formularies
If you take specialty medications, the plan's drug tier placement matters enormously — and that's not captured in the AV figure. A plan might have a high AV but place your drug on a specialty tier with steep cost-sharing.
It's a pre-subsidy figure
Premium tax credits reduce what you pay for premiums, but they don't change the AV of the plan. Factor your subsidy into total cost calculations separately. Insurers use detailed actuarial models — including risk pooling and demographic data — to price plans and predict aggregate costs. For a look at how that actuarial science applies to your specific premium, see how insurers assess risk to set your premium.
Same AV, Different Plan Structure
Two plans with identical actuarial values can have very different structures. One might feature a $500 deductible with 30% coinsurance; another might have a $3,000 deductible with $20 copays after that. The AV number is the same, but your experience using each plan could differ dramatically depending on when and how you access care. Always review the Summary of Benefits and Coverage for plan-specific details.
AV Applies Only to Covered Benefits
Actuarial value is calculated only on services the plan covers. If a service isn't covered at all — say, a specific therapy or out-of-network procedure — those costs don't factor into the AV calculation and you're responsible for 100% of them. Always check the plan's covered benefits list separately from its AV percentage.
Employer Plans and AV
While the ACA metal tier labels apply specifically to individual and small-group marketplace plans, many large employer-sponsored plans also calculate actuarial value for internal benchmarking and compliance purposes (particularly for minimum value determinations under the ACA's employer mandate). If your employer plan has at least a 60% AV, it meets the federal minimum value standard.
Putting It All Together: Choosing the Right AV for Your Situation
Now that you understand what actuarial value measures, here's a practical framework for using it in your plan selection:
Choose a lower AV (Bronze/Catastrophic) if:
- You're young and healthy with minimal expected healthcare use
- You have a robust emergency fund to cover a high deductible if needed
- You want the lowest possible premium and are comfortable with financial risk
- You're primarily protecting against catastrophic, unexpected costs
Choose a mid-range AV (Silver) if:
- You qualify for Cost-Sharing Reductions — Silver becomes your best value
- You use a moderate amount of care (annual checkups, a few specialist visits, regular prescriptions)
- You want balanced premiums and predictable out-of-pocket costs
Choose a higher AV (Gold/Platinum) if:
- You have a chronic condition or anticipate significant healthcare use
- You value predictability and want minimal surprise bills
- You can afford higher premiums and want to transfer more financial risk to the insurer
The right actuarial value isn't the highest one — it's the one that aligns with your health needs, financial cushion, and risk tolerance. Use AV as your starting filter, then dig into the specific plan details: network, formulary, and individual cost-sharing rules.
For a comprehensive comparison of how the tiers play out in real marketplace plan scenarios, visit our Marketplace Plans hub.
Same AV, Different Plan Structure
Two plans with identical actuarial values can have very different structures. One might feature a $500 deductible with 30% coinsurance; another might have a $3,000 deductible with $20 copays after that. The AV number is the same, but your experience using each plan could differ dramatically depending on when and how you access care. Always review the Summary of Benefits and Coverage for plan-specific details.
AV Applies Only to Covered Benefits
Actuarial value is calculated only on services the plan covers. If a service isn't covered at all — say, a specific therapy or out-of-network procedure — those costs don't factor into the AV calculation and you're responsible for 100% of them. Always check the plan's covered benefits list separately from its AV percentage.
Employer Plans and AV
While the ACA metal tier labels apply specifically to individual and small-group marketplace plans, many large employer-sponsored plans also calculate actuarial value for internal benchmarking and compliance purposes (particularly for minimum value determinations under the ACA's employer mandate). If your employer plan has at least a 60% AV, it meets the federal minimum value standard.
Frequently Asked Questions
All claims in this article are backed by peer-reviewed research. We follow strict editorial guidelines to ensure accuracy and reliability. Sources available on request from our editorial team.
