2025 Medicare Cost Comparison: Advantage vs Supplement Plans

Planning your Medicare budget for 2025? Understanding the true cost of Medicare goes beyond just monthly premiums. You need to factor in out-of-pocket expenses, deductibles, and copayments that can add up to thousands of dollars annually. Let me break down exactly what you’ll pay with Medicare Advantage versus Medicare Supplement plans, so you can make an informed decision that protects both your health and your wallet.

Understanding Your Medicare Plan Options

Before diving into costs, it’s important to understand how these two main Medicare options work differently. Medicare Supplement plans versus Medicare Advantage plans operate on completely different models that affect both your monthly costs and out-of-pocket expenses.

Medicare Supplement (Medigap) plans work alongside Original Medicare Parts A and B. These plans pay second to Original Medicare, which means you can visit any doctor nationwide that accepts Original Medicare. Claims are automatically approved and paid directly to providers. However, these plans don’t include prescription drug coverage, dental, or vision benefits—you’ll need to purchase those separately.

Medicare Advantage plans, on the other hand, replace Original Medicare entirely. They’re typically structured as HMO or PPO plans that combine Parts A and B into one plan. Most Medicare Advantage plans include prescription drug coverage plus extra benefits like dental, vision, and fitness memberships.

Original Medicare Baseline Costs for 2026

Every Medicare beneficiary pays certain baseline costs regardless of which supplemental coverage they choose. Part A is free if you’ve worked at least 10 years and earned 40 working credits (you can verify this at ssa.gov). Part B costs $202.90 per month for most people.

However, higher-income earners pay more through IRMAA (Income-Related Monthly Adjustment Amount). This adjustment applies based on your gross adjusted income from two years prior. In 2026, Medicare reviews your 2022 tax return to determine your IRMAA adjustment. What surprises many clients is that IRMAA affects both Part B and Part D premiums, potentially adding hundreds of dollars to your monthly Medicare costs.

Agent Tip

Many clients are shocked when their Medicare premiums jump due to IRMAA. If you had a one-time capital gain or retirement account distribution two years ago, you might face higher premiums this year. The good news? You can appeal if your income has decreased significantly since then.

Medicare Supplement Plan Costs Breakdown

Medicare Supplement premiums vary significantly based on your age, gender, location, and insurance carrier. The most popular plans—Medicare Plan G and Plan N—typically range from $80 to $175 per month.

For example, Plan G for a 65-year-old female in Houston, Texas ranges from $100 to $220 per month depending on the carrier. Plan N in the same zip code starts around $90 per month. Since Medigap plans are standardized by law, different insurance companies charge different prices for identical coverage—this is where shopping around really pays off.

Here’s what your total monthly cost looks like with the Medicare Supplement route:

• Part A: $0 (with 40 working credits)
• Part B: $202.90
• Part D prescription plan: $0 to over $100 (most clients pay under $20)
• Plan G or N premium: $80 to $150 (varies by location and carrier)

The average total comes to approximately $300 per month, though this varies significantly by location, age, gender, and IRMAA status.

Out-of-Pocket Costs with Medicare Supplement Plans

This is where Medicare Supplement plans really shine. With Plan G, you only pay the $283 Part B annual deductible—that’s it. No copayments for doctor visits, specialist appointments, or hospital stays.

Plan N requires you to meet that same $283 annual deductible, then you’ll pay $0 to $20 copayments at doctor visits and $50 at the emergency room (waived if you’re admitted). The one thing Plan N doesn’t cover is Part B excess charges, but you can avoid these by verifying Medicare assignment at Medicare.gov before each appointment.

Medicare Advantage Cost Structure

Medicare Advantage plans operate on a dramatically different cost model. Your monthly premium breakdown typically looks like this:

• Part A: $0 (with 40 working credits)
• Part B: $202.90 (unless subject to IRMAA)
• Part C premium (including drug coverage): Often $0

Your total monthly premium is usually around $202.90—significantly lower than Medicare Supplement plans. However, this is where the “pay-as-you-go” model kicks in.

Medicare Advantage plans have maximum out-of-pocket limits ranging from $3,000 to $7,000 annually. You’ll pay copayments for most services: typically $0 to $30+ for doctor visits, plus additional costs for emergency room visits, urgent care, hospital stays, and other medical services.

Agent Tip

The $0 premium Medicare Advantage plans often look attractive, but they typically have higher copayments and out-of-pocket maximums. I always recommend clients budget for at least half of their plan’s maximum out-of-pocket limit when planning their Medicare costs.

Network Restrictions and Additional Considerations

Medicare Advantage plans come with network restrictions that can affect your costs. You’ll need to verify that your doctors are in-network and understand any specialist referral requirements. Going out-of-network can result in significantly higher costs or no coverage at all.

To help offset potential out-of-pocket costs, I often recommend hospital indemnity plans (where available) for Medicare Advantage enrollees. These supplemental policies typically include riders for cancer diagnosis and optional coverage for heart attacks or strokes, providing additional financial protection.

Real-World Cost Comparison

Cost Factor	Medicare Supplement	Medicare Advantage
Average Monthly Premium	~$300	~$202.90
Annual Deductible	$283 (Plan G/N)	Varies by plan
Doctor Visit Copays	$0 (Plan G), $0-$20 (Plan N)	$0-$30+ per visit
Maximum Out-of-Pocket	Very low ($283 for Plan G)	$3,000-$7,000
Network Restrictions	None (any Medicare provider)	Yes (HMO/PPO networks)

The key takeaway? Medicare Supplement plans offer predictable, low out-of-pocket costs with higher monthly premiums, while Medicare Advantage plans provide lower monthly premiums but potential for higher out-of-pocket expenses when you need care.

Which Option Costs Less Over Time?

The answer depends on your health status and medical needs. If you rarely visit doctors and stay relatively healthy, Medicare Advantage might cost less annually. However, if you have ongoing health conditions, see specialists regularly, or want the peace of mind that comes with predictable costs, Medicare Supplement plans often provide better value despite higher monthly premiums.

Remember that Medicare Supplement plans also offer nationwide coverage without network restrictions, making them ideal for travelers or anyone who wants maximum flexibility in choosing healthcare providers.

Making Your Decision

When comparing Medicare costs, don’t just look at monthly premiums. Consider your total potential annual costs, including deductibles, copayments, and out-of-pocket maximums. Factor in your current health status, prescription drug needs, and whether your current doctors accept Medicare or participate in specific Medicare Advantage networks.

The timing of your Medicare enrollment also affects your options and costs. During your Initial Enrollment Period, you have guaranteed issue rights for Medicare Supplement plans regardless of health conditions.

Frequently Asked Questions

What’s the average monthly cost difference between Medicare Supplement and Medicare Advantage?

Medicare Supplement plans typically cost around $300 per month total (including Part B and Part D), while Medicare Advantage averages around $202.90 monthly. However, Medicare Advantage plans have higher potential out-of-pocket costs when you need medical care.

Do Medicare Supplement premiums increase every year?

Yes, Medicare Supplement rates typically increase annually, usually by 3-8% depending on the carrier and your age. However, these increases are often predictable and gradual compared to the potential volatility of Medicare Advantage plan changes.

Can I switch from Medicare Advantage to Medicare Supplement anytime?

You can switch during Medicare’s Annual Open Enrollment (October 15 – December 7), but switching to Medicare Supplement may require medical underwriting unless you qualify for a Special Enrollment Period or guaranteed issue rights.

What happens if my Medicare Advantage plan’s costs increase significantly?

Medicare Advantage plans can change their costs, benefits, and networks annually. If your plan becomes unaffordable or no longer meets your needs, you can switch during Open Enrollment, but your options may be limited by network availability and plan offerings in your area.

Should I consider IRMAA when choosing between Medicare plans?

Absolutely. IRMAA affects both Part B and Part D premiums regardless of which plan type you choose. However, if you’re subject to IRMAA, the percentage impact on your total Medicare costs may be less significant with Medicare Supplement plans due to their already higher baseline premiums.