Medicare Advantage vs Supplement Cost: Which is Cheaper?

Choosing between Medicare Advantage and Medigap (Medicare Supplement) often comes down to one question: which plan saves you more money? The answer is rarely straightforward. Your health, income, and risk tolerance all play a role. This article breaks down the true cost of each option, including premiums, deductibles, copays, and out-of-pocket limits. By the end, you will know exactly which path fits your budget and healthcare needs.

How the Two Plans Handle Costs Differently

Medicare Advantage (Part C) replaces Original Medicare with a private plan. These plans typically offer low or zero monthly premiums but charge copays for doctor visits, specialists, and hospital stays. They also cap your annual out-of-pocket spending. In 2025, the maximum out-of-pocket limit for Medicare Advantage plans is $8,300 for in-network care and $12,450 for combined in- and out-of-network care. Once you hit that cap, the plan pays 100% for covered services.

Medigap policies work alongside Original Medicare. You pay a monthly premium to a private insurer, and the policy covers some or all of the gaps in Medicare Part A and B. For example, a Medigap Plan G pays for your Part A deductible, Part B coinsurance, and excess charges. However, Medigap does not include drug coverage, so you need a separate Part D plan. The trade-off is predictability: you know your monthly premium, and there is no annual out-of-pocket cap unless you choose a high-deductible plan.

Breaking Down the Monthly Premiums

The most visible cost difference is the monthly premium. Many Medicare Advantage plans advertise $0 premiums. In 2024, the average Medicare Advantage premium is about $15 per month, but roughly 60% of beneficiaries pay nothing. You still must pay your Part B premium ($174.70 in 2024), which is deducted from your Social Security check. Medigap premiums vary widely by state, age, and gender. A 65-year-old nonsmoker in Florida might pay $120 per month for Plan G, while the same policy in New York could cost $250. Over a year, that difference adds up to $1,440 to $3,000.

Here is a quick comparison of typical monthly costs:

• Medicare Advantage: $0 to $50 monthly premium (plus Part B premium).
• Medigap Plan G: $100 to $300 monthly premium (plus Part B premium and Part D premium).
• Medigap Plan N: $80 to $200 monthly premium (plus Part B and Part D premiums).
• Part D drug plan: $10 to $60 monthly premium (required with Medigap).

While a $0 premium sounds appealing, remember that Medicare Advantage plans charge copays for every service. If you see a specialist often, those $20 to $50 copays can pile up quickly.

Out-of-Pocket Costs: Copays, Coinsurance, and Deductibles

Medicare Advantage plans use copays and coinsurance for most services. A typical plan might charge $10 for a primary care visit, $40 for a specialist, and $350 per day for a hospital stay (days 1 through 5). Some plans include a small annual deductible, often around $0 to $250. Medigap plans, on the other hand, cover most cost-sharing. Plan G pays your Part A deductible ($1,632 in 2024) and Part B coinsurance (20% of Medicare-approved amounts). You only pay the Part B deductible ($240 in 2024) and any excess charges (if the provider does not accept assignment).

Consider a real-world example. Suppose you have a chronic condition requiring monthly specialist visits, two MRIs per year, and one overnight hospital stay. Under a Medicare Advantage plan with a $0 premium, you might pay $40 per specialist visit (12 visits = $480), $200 per MRI (2 MRIs = $400), and $350 for the hospital stay. Total out-of-pocket: $1,230 plus the Part B premium. Under Medigap Plan G, you pay the monthly premium ($150) plus the Part B deductible ($240). Annual cost: $150 x 12 = $1,800 + $240 = $2,040. In this scenario, Medicare Advantage costs less. But if you have a major health event, the calculus changes.

The Hidden Risk: No Out-of-Pocket Cap with Medigap

One critical difference is that Medigap policies do not have an annual out-of-pocket maximum. Original Medicare also lacks a cap. If you face a catastrophic illness or injury, your 20% Part B coinsurance can become enormous. For example, a $100,000 hospital bill results in $20,000 in coinsurance. Medigap Plan G covers that entirely, but you still pay the monthly premium. With Medicare Advantage, your out-of-pocket spending stops at the plan’s maximum. In 2025, that cap is $8,300 for in-network care. So, for someone with very high medical costs, Medicare Advantage provides a financial safety net that Medigap does not.

However, Medigap offers more predictable costs for routine care. If you prefer to know exactly what you will spend each month, Medigap is appealing. If you are willing to take some risk in exchange for lower premiums, Medicare Advantage may be the better choice. For a deeper look at how plan ratings can guide your decision, see our 2025 Medicare Advantage Plans Ratings: Key Insights for Informed Choices.

Network Restrictions and Referral Requirements

Medicare Advantage plans often use HMO or PPO networks. HMO plans require you to see in-network providers and get referrals to see specialists. PPO plans allow out-of-network care but at a higher cost. If your preferred doctors are out of network, you may pay significantly more. Medigap plans let you see any doctor or hospital that accepts Medicare, nationwide. This freedom is valuable for snowbirds, frequent travelers, or those with complex conditions who need access to top specialists. When comparing costs, factor in the potential expense of going out of network. A few out-of-network visits could erase the savings from a low premium.

Drug Coverage and Extra Benefits

Most Medicare Advantage plans include Part D drug coverage. This simplifies your insurance under one card and one premium. Medigap requires a separate Part D plan, which adds another monthly premium and deductible. The stand-alone Part D premium averages $30 to $60, but it can be higher if you take expensive medications. On the plus side, Medicare Advantage plans often bundle extras like dental, vision, hearing, and fitness memberships. These benefits can save you hundreds of dollars annually. For example, a plan that covers two dental cleanings ($300 value) and one eye exam ($100 value) effectively reduces your net cost. When evaluating the cost of Medicare Advantage vs Supplement, include the value of these extra benefits.

When to Switch: The Guaranteed Issue Window

You have a one-time opportunity to buy a Medigap policy without medical underwriting. This guaranteed issue period starts when you first enroll in Medicare Part B and lasts six months. During that window, you can buy any Medigap plan in your state regardless of health conditions. After that, insurers can deny coverage or charge higher premiums based on your health. If you choose a Medicare Advantage plan initially and later want to switch to Medigap, you may face underwriting and higher costs. This is a major factor in the Medicare Advantage vs supplement cost debate. Many people stick with Medigap to keep the option of switching later without penalty. For insights on how upcoming rules affect your options, read our 2026 Medicare Advantage Final Rule Uncovered: Big Updates.

Regional Variations in Cost

Your location heavily influences plan pricing. Medicare Advantage premiums vary by county. In areas with heavy competition, $0 premium plans are common. In rural areas, fewer plans may mean higher premiums and narrower networks. Medigap premiums are also state-specific. Some states, like New York and Connecticut, guarantee issue year-round and use community rating, meaning everyone pays the same premium regardless of age. Other states use attained-age rating, where premiums increase as you get older. Issue-age rating sets your premium based on the age you enroll, and it only increases with inflation. Before choosing, compare both plan types in your zip code. A plan that looks cheap nationally might be expensive in your area.

How to Estimate Your Total Annual Cost

To make an apples-to-apples comparison, estimate your total spending for the year under each option. Follow these steps:

1. List your expected healthcare use: primary care visits, specialist visits, prescriptions, hospital stays, procedures.
2. Get plan details: For Medicare Advantage, find the copays, deductible, and out-of-pocket maximum. For Medigap, find the monthly premium and the Part D plan costs.
3. Calculate the total: Add premiums (Part B + plan premium) plus expected copays and deductibles. For Medigap, also add the Part D premium and deductible.
4. Compare worst-case scenarios: For Medigap, the worst case is your premium plus the Part A deductible and Part B deductible. For Medicare Advantage, the worst case is your premium plus the out-of-pocket maximum.
5. Factor in extra benefits: Subtract the value of dental, vision, hearing, or gym memberships from the Medicare Advantage total.

This calculation gives you a clear picture. For many, the lower premium of Medicare Advantage wins when health spending is moderate. For those with high spending or who want predictability, Medigap is often worth the extra cost.

Real-World Scenarios: Which Plan Wins?

Let us walk through three common situations. First, a healthy 66-year-old who rarely sees a doctor. With Medicare Advantage ($0 premium, $10 copay for two visits), annual cost is $20 plus the Part B premium. With Medigap Plan G ($150 monthly premium), annual cost is $1,800 plus Part B. Medicare Advantage saves about $1,780 per year. Second, a 70-year-old with diabetes and arthritis who sees specialists monthly, takes three medications, and needs an annual MRI. With Medicare Advantage, copays might total $1,500 plus drug costs. With Medigap, the premium is $2,400 plus Part D premium ($600) and deductible ($240), totaling $3,240. Medicare Advantage still wins. Third, a 75-year-old who develops cancer and needs chemotherapy, surgery, and hospital stays. Medicare Advantage caps out-of-pocket at $8,300. Medigap covers all cost-sharing, but the premium ($3,000) plus Part D ($720) totals $3,720. In this case, Medigap is cheaper for high-cost care. For the latest on how plan changes affect your options, see our 2026 Medicare Advantage Advance Notice Explained Simply.

Frequently Asked Questions

Can I switch from Medicare Advantage to Medigap later?

Yes, but outside your initial enrollment window, you will likely face medical underwriting. Insurers can deny coverage or charge more based on your health. Some states offer special enrollment periods that allow switching without underwriting, but these are rare.

Does Medigap cover prescription drugs?

No. Medigap policies do not include Part D drug coverage. You must enroll in a separate stand-alone Part D plan to get prescription drug coverage. Some older Medigap plans (issued before 2006) include drug coverage, but they are no longer sold.

Are Medicare Advantage plans cheaper than Medigap?

On average, yes. The lower monthly premium makes Medicare Advantage attractive. However, the total annual cost depends on your health. If you use many services, copays can add up. Medigap offers predictable costs but higher premiums.

What is the out-of-pocket maximum for Medigap?

Standard Medigap plans do not have an out-of-pocket maximum. Only high-deductible Plan F and Plan G have a deductible ($2,800 in 2024) that acts as a cap before coverage begins. After meeting the deductible, the plan pays 100% for the rest of the year.

Can I keep my doctor with Medicare Advantage?

It depends on the plan’s network. HMO plans require in-network providers. PPO plans allow out-of-network care at higher cost. Always check whether your doctors are in the plan’s network before enrolling. For guidance on choosing plans from specific insurers, check our 2026 Humana Medicare Advantage Plans: Savings & Benefits Guide.

Making Your Final Decision

There is no single right answer for everyone. The choice between Medicare Advantage and Medigap depends on your health, budget, and tolerance for risk. If you value low upfront costs and are comfortable with network restrictions, Medicare Advantage may be the better fit. If you want predictable spending and the freedom to see any doctor, Medigap is worth the higher premium. Always compare plans in your area using the Medicare Plan Finder or speak with a licensed agent. By understanding the true cost of Medicare Advantage vs supplement cost, you can make a confident choice that protects both your health and your wallet.