Metal tiers are the four categories of health insurance plans sold on the ACA Marketplace: Bronze, Silver, Gold, and Platinum. The difference between them comes down to one thing: how you and your insurance company split the cost of your medical care. A Bronze plan covers about 60% of your costs, while a Platinum plan covers about 90%. The tier you choose does not affect the quality of care you receive or which services are covered.
How the Four Tiers Split Costs
Every Marketplace plan covers the same set of essential health benefits. The metal tier determines what percentage of your total medical costs the plan pays versus what you pay through deductibles, copays, and coinsurance.
- Bronze: The plan pays about 60%, you pay about 40%. Deductibles are high.
- Silver: The plan pays about 70%, you pay about 30%. Deductibles are moderate.
- Gold: The plan pays about 80%, you pay about 20%. Deductibles are low.
- Platinum: The plan pays about 90%, you pay about 10%. Deductibles are low.
These percentages are estimates averaged across a typical population, not a guarantee of your exact costs. Your actual split depends on the specific plan and how much care you use in a given year. Regardless of tier, every Marketplace plan caps your annual out-of-pocket spending. For 2025, that cap is $9,200 for an individual and $18,400 for a family.
The Premium vs. Out-of-Pocket Tradeoff
The core tradeoff is straightforward: the more a plan covers when you get care, the more you pay each month in premiums. Bronze plans have the lowest monthly premiums but the highest costs when you actually visit a doctor, fill a prescription, or have a hospital stay. Platinum plans flip that equation, charging the highest premiums but leaving you with the smallest bills at the point of care.
This means your total annual spending on health care isn’t just your premium. It’s your premium plus every deductible dollar, copay, and coinsurance payment you make throughout the year. A cheap Bronze premium can end up costing more overall than a Gold plan if you need frequent care. Conversely, if you rarely see a doctor, paying Platinum-level premiums for coverage you never use wastes money.
Who Each Tier Works Best For
Bronze plans make the most financial sense if you’re generally healthy, rarely need medical care beyond preventive visits (which are free on all tiers), and want the lowest possible monthly bill. You’re essentially betting that you won’t need much care this year, and you’re comfortable absorbing a high deductible if something unexpected happens.
Silver plans sit in the middle and are the most popular choice on the Marketplace. They offer a meaningful advantage that no other tier has: if your income qualifies you for cost-sharing reductions, enrolling in a Silver plan automatically lowers your deductible, copays, and coinsurance. These extra savings only apply to Silver plans, making them significantly more valuable for lower-income enrollees than the 70/30 split alone would suggest. The lower your income within the qualifying range, the more generous these reductions become.
Gold plans are a strong fit if you use health care regularly, whether that’s ongoing prescriptions, specialist visits, or managing a chronic condition. You pay more each month, but your costs at each appointment and pharmacy visit drop noticeably compared to Bronze or Silver.
Platinum plans make sense if you anticipate heavy medical use: planned surgeries, expensive medications, or frequent specialist care. The high premium pays for itself when your share of each bill drops to roughly 10%.
Silver Plans and Cost-Sharing Reductions
Cost-sharing reductions are one of the most misunderstood features of the Marketplace. They work like an invisible upgrade to your Silver plan, reducing your deductible, copays, coinsurance, and even your annual out-of-pocket maximum. If you qualify based on income, a Silver plan can effectively perform like a Gold or even Platinum plan at a fraction of the premium.
Your eligibility notice from the Marketplace will tell you whether you qualify. If it includes a code like (04), (05), or (06), you’re eligible for these income-based savings, but only if you enroll in a Silver plan. Choosing a Bronze, Gold, or Platinum plan forfeits the benefit entirely. This is why financial advisors and enrollment counselors often push Silver for anyone in the qualifying income range.
Catastrophic Plans: A Fifth Option
There’s also a Catastrophic tier below Bronze, designed as a safety net rather than everyday coverage. These plans have very low premiums and very high deductibles. They cover three primary care visits per year and preventive services before you hit your deductible, but beyond that, you’re paying full price until you reach the out-of-pocket maximum.
Catastrophic plans are restricted to people under 30, or those over 30 who qualify for a hardship or affordability exemption (meaning Marketplace or job-based insurance is unaffordable for them). If you’re young, healthy, and mostly want protection against a worst-case medical event, this tier keeps your monthly costs as low as possible.
HSA Compatibility
If you want to pair your health plan with a Health Savings Account, your plan needs to qualify as a high-deductible health plan. Starting in 2026, all Bronze and Catastrophic Marketplace plans are HSA-eligible, thanks to legislation signed into law in 2025. Some Silver and Gold plans may also qualify if they’re specifically designated as HSA-eligible, but this is less common. HSAs let you set aside pre-tax money for medical expenses, which can offset the sting of a high deductible on a Bronze plan.
How to Compare Your Total Costs
The most useful way to choose a tier is to estimate your total annual health care spending, not just compare premiums. Start by listing the care you expect to use: how many doctor visits, which prescriptions, any planned procedures. Then look at plans across multiple tiers and calculate your likely total cost (premiums plus out-of-pocket) for each one.
The Marketplace shopping tool lets you enter your expected usage and see estimated yearly costs by tier. This approach often reveals surprises. A Gold plan with a $400 monthly premium might cost you less overall than a Bronze plan at $200 per month if you take several medications and see specialists quarterly. The breakeven point depends entirely on how much care you use.
One important detail: plans within the same tier can vary quite a bit. Two Silver plans from different insurers might have different deductibles, different copay amounts, and different provider networks. The metal tier tells you the approximate overall cost split, but you still need to compare the specifics of each plan to find the best fit.