Neither Medicare Advantage nor Medigap is universally cheaper — the answer depends almost entirely on how much medical care you actually use. A healthy 65-year-old who sees a doctor twice a year will almost certainly spend less with a Medicare Advantage plan, where 67% of plans with drug coverage charge no monthly premium beyond the standard $202.90 Part B payment. But a senior managing diabetes, heart disease, or other chronic conditions could easily rack up thousands in Medicare Advantage copays and coinsurance, pushing toward the $9,250 maximum out-of-pocket cap in 2026 — while a Medigap Plan G enrollee paying roughly $220 per month in premiums would face near-zero costs at every doctor visit and hospital stay. Consider two retirees, both age 65.
Linda is healthy and visits her primary care doctor quarterly. On a $0-premium Medicare Advantage plan, her total annual cost beyond Part B might be a few hundred dollars in copays. Her neighbor Frank, recovering from a hip replacement and managing high blood pressure, could face $4,000 to $6,000 in annual out-of-pocket costs under Medicare Advantage. Had Frank enrolled in Medigap Plan G at $220 per month, he would pay $2,640 annually in premiums but almost nothing else — saving him potentially thousands over the course of a year. This article breaks down the real 2026 costs for both options, explains when each one actually saves money, covers prescription drug considerations, walks through enrollment timing pitfalls that can permanently raise your premiums, and lays out a practical framework for deciding which path makes the most financial sense for your situation.
Table of Contents
- How Much Do Medicare Advantage and Supplement Plans Actually Cost in 2026?
- When Does Medicare Advantage Actually Save You Money — and When Does It Backfire?
- The Medigap Pricing Trap That Can Cost You Thousands Over a Lifetime
- Prescription Drug Costs — The Hidden Variable in the Medicare Advantage vs. Medigap Decision
- Enrollment Timing Mistakes That Can Lock You Into Higher Costs Permanently
- Household Discounts and Other Ways to Reduce Medigap Premiums
- How the Medicare Advantage Market Is Shifting in 2026 and What It Means for Your Wallet
- Conclusion
- Frequently Asked Questions
How Much Do Medicare Advantage and Supplement Plans Actually Cost in 2026?
The headline numbers are deceptively simple. Medicare Advantage premiums have dropped to an average of $14.00 per month across all enrollees in 2026, down from $16.40 in 2025. Among plans that do charge a premium, the average is $34.50 per month. Medigap premiums, by contrast, range from $100 to over $300 monthly depending on the plan type, your age, where you live, and which insurer you choose. The average Plan G premium — the most popular Medigap option — runs about $220 per month at age 65 and climbs to roughly $238 per month by age 75. But premiums are only half the equation.
Medicare Advantage plans use copays, coinsurance, and deductibles every time you receive care. The maximum out-of-pocket limit for in-network services is $9,250 in 2026. That means in a worst-case scenario — a serious surgery, cancer treatment, extended hospitalization — you could owe up to $9,250 in a single year on top of your premiums. Medigap plans cover most or all of Medicare’s cost-sharing, which means after you pay your monthly premium, you face near-zero costs at the point of care. The Part B deductible for Medigap users is $283 in 2026, and after that, Plan G covers essentially everything. To put this in real dollars: a senior on Original Medicare plus Medigap Plan G pays about $423 per month total ($202.90 for Part B plus $220 for Plan G), or roughly $5,076 annually, and then walks into any Medicare-accepting doctor’s office without worrying about additional bills. A Medicare Advantage enrollee pays $202.90 for Part B plus somewhere between $0 and $34.50 for the plan premium, but each visit, test, and procedure generates a separate bill that can add up fast.
When Does Medicare Advantage Actually Save You Money — and When Does It Backfire?
Medicare Advantage is the clear winner for people who use relatively little healthcare. If you are in good health, take few or no prescription medications, and primarily need preventive care and occasional doctor visits, the math is straightforward. You save $200 or more per month in premiums compared to Medigap, and your actual out-of-pocket spending stays low because you are not generating many claims. Many Medicare Advantage plans also bundle extras like dental, vision, hearing, and gym memberships — benefits that Original Medicare plus Medigap simply does not cover. For a healthy retiree, these perks can add real value on top of the premium savings. However, if your health changes — and statistically, it will — Medicare Advantage can become significantly more expensive.
The critical problem is that switching from Medicare Advantage to Medigap after your initial enrollment period typically requires medical underwriting. If you have developed any health conditions during your years on Medicare Advantage, insurers can charge you higher premiums or deny Medigap coverage altogether, depending on your state’s regulations. This is the trap many seniors do not see coming. You save money for five healthy years on Medicare Advantage, then get diagnosed with something serious and find yourself locked into a plan structure with $9,250 in potential annual exposure — unable to switch to Medigap’s predictable, near-zero cost-sharing. The 35.5 million people enrolled in Medicare Advantage as of February 2026 represent continued growth, though the pace has slowed sharply — from 9% average annual growth between 2007 and 2024 to just 3% in 2026. Part of that slowdown reflects insurers tightening benefits and narrowing networks in response to changes in government reimbursement rates. Some seniors who joined Medicare Advantage for the low premiums and extra benefits are discovering that network restrictions and prior authorization requirements come with real costs in convenience and access.
The Medigap Pricing Trap That Can Cost You Thousands Over a Lifetime
Not all Medigap premiums work the same way, and choosing the wrong pricing structure can quietly drain your retirement savings. Medigap insurers use three pricing methods: community-rated, issue-age-rated, and attained-age-rated. Community-rated plans charge everyone the same price regardless of age — a 65-year-old and an 80-year-old pay the same base premium. Issue-age-rated plans lock your premium to the age you were when you enrolled, so enrolling at 65 means your rate is based on that age for life (though premiums can still rise with inflation). Attained-age-rated plans increase your premium as you get older, starting low but potentially climbing substantially over the decades. Here is where this gets expensive in practice.
A 65-year-old might find an attained-age-rated Plan G for $170 per month — seemingly a bargain compared to a community-rated plan at $240. But by age 80, that attained-age premium could reach $350 or more per month, while the community-rated plan might have only increased with inflation to $280. Over 20 years of retirement, the attained-age plan could cost $10,000 to $15,000 more in total premiums than the community-rated alternative that looked more expensive on day one. If you are shopping for Medigap, ask every insurer which pricing method they use before comparing quotes. The high-deductible Plan G option deserves a mention for budget-conscious seniors who want Medigap’s protection without the full premium hit. Premiums run as low as $32 to $50 per month, but you must pay $2,950 out of pocket before coverage kicks in during 2026. This functions similarly to a high-deductible health plan — you are betting that your annual costs will stay below $2,950, and if they do, you have saved substantially on premiums while still having catastrophic protection.
Prescription Drug Costs — The Hidden Variable in the Medicare Advantage vs. Medigap Decision
One of the most overlooked differences between these two paths is how prescription drugs fit into the picture. Most Medicare Advantage plans bundle Part D drug coverage, with an average Part D premium within MA plans of just $11.50 per month in 2026. Medigap, on the other hand, does not cover prescription drugs at all. Medigap enrollees must purchase a separate standalone Part D plan, which averages $40 to $50 per month. That is an additional $480 to $600 annually that needs to be factored into any honest cost comparison. The 2026 Part D landscape does bring one piece of good news for everyone: the annual out-of-pocket cap on prescription drug spending is $2,100, up slightly from $2,000 in 2025.
The maximum Part D deductible is $615 in 2026. For seniors taking expensive specialty medications, this cap provides meaningful protection regardless of which Medicare path they choose. But the monthly premium difference between MA-bundled drug coverage and standalone Part D still tilts the prescription cost comparison in Medicare Advantage’s favor by roughly $30 to $40 per month. When you add standalone Part D premiums to Medigap costs, the total monthly outlay for an Original Medicare plus Medigap plus Part D setup at age 65 looks something like this: $202.90 (Part B) plus $220 (Plan G) plus $45 (Part D) equals roughly $468 per month, or $5,616 annually — before you fill a single prescription. A Medicare Advantage enrollee with bundled drug coverage might pay $202.90 (Part B) plus $0 to $34.50 (MA premium) for a total of $203 to $237 per month. The premium gap is roughly $230 to $265 per month, or $2,760 to $3,180 per year. That is real money — and for healthy seniors, it stays in their pocket.
Enrollment Timing Mistakes That Can Lock You Into Higher Costs Permanently
The single most expensive mistake in Medicare planning is missing your Medigap open enrollment period. When you first turn 65 and enroll in Part B, you get a six-month window during which every Medigap insurer must sell you a policy at standard rates regardless of your health — no medical underwriting, no denial, no surcharges. Once that window closes, insurers in most states can refuse to sell you a Medigap policy or charge significantly higher premiums based on your health history. This creates a one-way door problem. A 65-year-old who chooses Medicare Advantage to save money during healthy years cannot simply switch to Medigap at 72 when health problems emerge — at least not without potentially facing underwriting.
Some states, notably New York, Connecticut, and Massachusetts, offer stronger protections and guarantee Medigap access regardless of health or timing. But in most states, the decision you make at 65 has consequences that follow you for the rest of your Medicare life. If you are even considering Medigap, the financially safest move is to enroll during your open enrollment period, even if you are currently healthy. There is one partial safety net worth knowing about: if you join a Medicare Advantage plan within your first year on Medicare and decide to leave within 12 months, federal law guarantees you a right to buy a Medigap policy without underwriting. This trial right gives you a limited window to test Medicare Advantage and return to Original Medicare plus Medigap if the plan does not meet your needs. After that first year, the guaranteed-issue protections generally evaporate.
Household Discounts and Other Ways to Reduce Medigap Premiums
If both you and your spouse are enrolling in Medigap, you may be leaving money on the table. Many Medigap insurers offer household discounts of up to 15% when multiple people at the same address hold policies. On a $220 monthly premium, a 15% discount saves $33 per month, or nearly $400 per year per person.
For a couple, that is close to $800 annually — enough to cover a significant chunk of standalone Part D premiums. Beyond household discounts, shopping across multiple insurers is essential because Medigap plans are standardized by letter — Plan G from one company covers exactly the same benefits as Plan G from another. The only differences are price, customer service, and any discount programs offered. Getting quotes from at least three to five insurers, and specifically asking about community-rated pricing, household discounts, and nonsmoker discounts, can shave hundreds off your annual costs without sacrificing any coverage.
How the Medicare Advantage Market Is Shifting in 2026 and What It Means for Your Wallet
The slowdown in Medicare Advantage growth — from 9% annually down to 3% in 2026 — signals a market in transition. Insurers are adjusting to reduced government payments, and the ripple effects are showing up in narrower provider networks, more aggressive prior authorization requirements, and trimmed supplemental benefits in some plans. The 35.5 million people currently enrolled in Medicare Advantage still represent a massive and growing share of the Medicare population, but the era of rapid expansion with ever-richer benefits appears to be cooling. For seniors making a decision right now, this shift matters.
A Medicare Advantage plan that offers generous benefits today may look different next year when the insurer recalibrates for 2027. Plans can change their cost-sharing, networks, and extra benefits annually, giving enrollees limited long-term predictability. Medigap, by contrast, offers standardized benefits that do not change — Plan G will cover the same things in 2036 as it does in 2026. If financial predictability over a 20- or 30-year retirement is your priority, that stability has real value, even if it comes at a higher monthly premium.
Conclusion
The honest answer is that Medicare Advantage saves most healthy seniors money in the short term, while Medigap tends to save money for seniors who use significant healthcare services or who value long-term cost predictability. A healthy 65-year-old can reasonably save $3,000 or more annually by choosing a $0-premium Medicare Advantage plan over Medigap Plan G — but a single serious health event can erase years of savings through copays and coinsurance that push toward the $9,250 out-of-pocket maximum. The right choice depends on your current health, your risk tolerance, your financial reserves, and how much you value the freedom to see any Medicare-accepting provider without network restrictions. Whatever you decide, do it during your initial enrollment period at 65 when all options are open and Medigap is available at standard rates.
Run the numbers with your actual medications and doctors. Check whether your preferred providers are in-network for any Medicare Advantage plan you are considering. Ask Medigap insurers about their pricing method and household discounts. And remember that the cheapest plan today is not always the cheapest plan over a 20-year retirement — the goal is to minimize total lifetime healthcare costs, not just next month’s premium.
Frequently Asked Questions
Can I switch from Medicare Advantage to Medigap at any time?
You can leave Medicare Advantage during the annual enrollment period (October 15 through December 7) or during the Medicare Advantage open enrollment period (January 1 through March 31), but in most states, Medigap insurers can require medical underwriting after your initial open enrollment period at age 65. This means you could face higher premiums or denial based on health conditions. A few states, including New York, guarantee Medigap access regardless of health or timing.
Do I need a separate prescription drug plan with Medigap?
Yes. Medigap does not cover prescription drugs. You will need to enroll in a standalone Medicare Part D plan, which averages $40 to $50 per month in 2026. The annual out-of-pocket cap for Part D prescription costs is $2,100 in 2026, with a maximum deductible of $615.
What is the most popular Medigap plan in 2026?
Plan G is the most widely purchased Medigap option. It covers nearly all Medicare cost-sharing except the Part B deductible, which is $283 in 2026. Average Plan G premiums run about $220 per month at age 65. Plan F, which covered the Part B deductible, is no longer available to people who became newly eligible for Medicare after January 1, 2020.
Does Medicare Advantage really offer $0 premiums?
Many Medicare Advantage plans charge $0 in additional premiums beyond the standard Part B premium of $202.90 per month — 67% of MA plans with Part D coverage have $0 premiums in 2026. However, you still pay cost-sharing (copays and coinsurance) when you receive care, and the maximum you could owe out of pocket for in-network services is $9,250 in 2026.
What is the high-deductible Plan G, and is it worth considering?
High-deductible Plan G offers the same coverage as standard Plan G, but you must pay $2,950 in out-of-pocket costs before the plan begins paying in 2026. Premiums are dramatically lower — as low as $32 to $50 per month. It can make sense for healthy seniors who want catastrophic protection at a lower monthly cost, but the savings disappear quickly if you have a year with significant medical expenses.
Are Medicare Advantage extra benefits like dental and vision actually valuable?
Medicare Advantage plans often include dental, vision, hearing, and fitness benefits that Original Medicare does not cover and that Medigap does not add. The value varies widely by plan — some offer comprehensive dental coverage while others provide only basic preventive care. Compare the specific benefits offered against what you would pay out of pocket or through separate insurance for these services.
