Can You Afford This Medicare Plan? The Cheapest Premium May Not Be the Cheapest Choice
One of the most important Medicare questions has nothing to do with which plan has the lowest advertised premium. The better question is whether you can afford the type of coverage you want not only this year, but five, 10 or 20 years from now. A plan that looks inexpensive today can create more out-of-pocket costs or less flexibility later, while a higher-premium plan can provide more predictable expenses and broader provider access.
That is the real trade-off between Medicare Advantage and Original Medicare paired with a Medigap policy. Medicare Advantage can offer very low or even $0 additional premiums and extra benefits, while Medigap usually requires a separate monthly premium. The right choice depends on budget, healthcare use, provider preferences and how much flexibility you want later.
The First Question Is Whether the Premium Fits the Budget
Medigap premiums can represent a meaningful retirement expense. Depending on age, location, insurer, pricing method and plan letter, a beneficiary could pay well over $100 or $200 a month for supplemental coverage, and premiums can increase over time. A married couple needs separate Medigap policies, which can make the household cost considerably larger.
That does not mean the premium is wasted money. Medigap is designed to help pay some of the deductibles and coinsurance left behind by Original Medicare, giving beneficiaries more predictable healthcare costs. People who value predictable medical spending may decide that paying more every month is worth avoiding larger expenses when care is needed.
The important question is whether the premium remains affordable if retirement lasts 25 or 30 years. Someone who can comfortably pay a Medigap premium at 65 should still consider whether future rate increases could pressure the budget later. Choosing coverage that cannot realistically be maintained defeats much of the purpose of buying it in the first place.
A $0 Premium Medicare Advantage Plan Is Not Free Healthcare
Many Medicare Advantage plans advertise a $0 plan premium, which can make them appear dramatically cheaper than Medigap. Beneficiaries still generally pay the Medicare Part B premium, however, and the Advantage plan can charge copayments, coinsurance and deductibles when medical services are used. Each plan also has an annual out-of-pocket maximum for covered Part A and Part B services.
That creates a different financial structure. Someone who is healthy and uses relatively little healthcare may spend significantly less in a $0-premium Medicare Advantage plan than they would paying a Medigap premium every month. Someone with frequent specialist visits, hospital care or expensive treatments may face more cost sharing throughout the year.
Neither structure is automatically better. Medigap generally shifts more cost into a predictable monthly premium, while Medicare Advantage often shifts more of the cost toward the point when healthcare is actually used. The best choice depends partly on whether a retiree prefers predictable premiums or is comfortable accepting more variable medical expenses.
Provider Choice Can Be One of the Biggest Differences
Original Medicare allows beneficiaries to use any doctor or hospital in the United States that accepts Medicare. Medicare Advantage plans may require beneficiaries to use providers within a network for non-emergency care, depending on whether the plan is structured as an HMO, PPO or another type. Some plans offer out-of-network coverage, but it can cost more.
That difference can matter more than the premium for someone who travels frequently or wants access to a specific hospital system. A beneficiary with Original Medicare and Medigap generally has broader geographic flexibility because the Medigap policy follows Original Medicare’s provider rules. Someone in Medicare Advantage needs to pay more attention to the network attached to the individual plan.
Networks can also change. A physician or hospital that participates in a Medicare Advantage plan this year may not necessarily remain in the network indefinitely. That does not make Medicare Advantage a poor choice, but it means provider access should be reviewed regularly rather than assumed to remain unchanged forever.
Prior Authorization Is Another Important Trade-Off
Prior authorization is much more common in Medicare Advantage than in Original Medicare. KFF found that nearly all Medicare Advantage enrollees were in plans requiring prior authorization for at least some services in 2026, particularly hospital stays, skilled nursing care, home health services and certain Part B drugs.
In 2024, Medicare Advantage insurers received nearly 53 million prior-authorization requests and denied about 4.1 million, or roughly 8%. That does not mean every denied request represented medically appropriate care that should have been approved, and beneficiaries have appeal rights when requests are denied. It does demonstrate that insurer approval can become part of the care process for many Medicare Advantage members.
Traditional Medicare generally does not use prior authorization for most services, although there are limited exceptions and new demonstration programs testing additional review in certain circumstances. Someone who strongly values minimizing insurer involvement may place a higher value on Original Medicare with Medigap. Another person may consider prior authorization an acceptable trade-off for lower monthly premiums and additional benefits.
Medigap Coverage Is Usually Guaranteed Renewable Once You Have It
One of Medigap’s most important features is what happens after a policy is issued. Standardized Medigap policies issued since 1992 are generally guaranteed renewable, even if the beneficiary develops serious health problems. As long as premiums are paid and other limited requirements are met, the insurer generally cannot cancel the policy simply because the person’s health deteriorates.
That protection can be valuable because healthcare needs often increase with age. Someone who buys a Medigap policy while healthy does not need to requalify medically each year just to keep the existing policy. The premium can change, but a new diagnosis by itself generally does not eliminate the coverage.
This is one reason retirees should consider affordability over the long term rather than only the first-year premium. The benefit of Medigap becomes more significant when a person knows the coverage can continue despite changes in health. Keeping the policy affordable enough to maintain is therefore central to the decision.
Moving From Medicare Advantage to Medigap Later Can Be Harder
One of the most dangerous Medicare assumptions is, “I’ll choose Medicare Advantage while I’m healthy and switch to Medigap if I get sick.” In many states, that strategy may not work as easily as expected. Outside the six-month Medigap Open Enrollment Period and specific guaranteed-issue situations, federal law generally does not give someone an automatic right to purchase any Medigap policy without medical underwriting.
That does not mean everyone who leaves Medicare Advantage will be denied. Some states provide additional protections, insurers may accept applicants voluntarily, and several federal guaranteed-issue rights can apply in specific situations. The rules depend heavily on the reason for leaving Medicare Advantage and where the beneficiary lives.
The important lesson is that future Medigap access should not be assumed. Someone selecting Medicare Advantage should be comfortable with the possibility that returning to Original Medicare later may not automatically come with unrestricted access to the Medigap policy they want. This is one of the most important long-term considerations when choosing coverage at 65.
There Is a Special Trial Right for Some New Medicare Advantage Members
Federal law provides a valuable exception for certain people trying Medicare Advantage for the first time. Someone who joins a Medicare Advantage plan when first eligible for Medicare at 65 generally has a 12-month trial right that can allow them to return to Original Medicare and purchase certain Medigap coverage without normal medical underwriting. There is also a trial right for some people who dropped Medigap to join Medicare Advantage for the first time.
The protection is limited and should not be confused with a permanent ability to switch back at any time. A person who remains in Medicare Advantage for several years may no longer have the same federal trial protection. State-specific rules can add additional opportunities, but they are not universal nationwide.
That makes the first year particularly important. Beneficiaries who are unsure whether Medicare Advantage fits their preferences should understand the trial-right rules before the 12-month window expires. Waiting several years to reconsider the decision can reduce future flexibility.
Medicare Advantage Plans Can Change or Leave the Market
Medicare Advantage plans operate on annual contracts and can change premiums, provider networks, drug formularies and supplemental benefits from one year to another. Insurers can also discontinue plans or leave particular counties. That makes the Annual Notice of Change an important document for every Medicare Advantage enrollee.
This issue became particularly visible going into 2026. KFF estimated that roughly 2.6 million people enrolled in individual Medicare Advantage prescription-drug plans were in plans terminated for 2026, compared with about 1.3 million facing terminations the year before. Most affected beneficiaries still had multiple Medicare Advantage options available, but they had to choose new coverage.
A terminated Medicare Advantage plan can also create important Medigap rights. Beneficiaries whose plan leaves Medicare or stops serving their area may qualify for guaranteed-issue protections when returning to Original Medicare. That is another reason the statement that people are permanently “locked out” of Medigap is too broad.
Medigap Plans Can Change in Price Too
Medigap provides more continuity of coverage, but that does not mean the premium remains fixed. Insurers can increase premiums subject to state insurance rules, and the way policies are priced can affect how costs evolve as the beneficiary ages. Some companies use attained-age pricing, while others use issue-age or community-rated structures.
Two Plan G policies generally provide the same standardized core benefits while charging very different premiums. Medicare specifically advises beneficiaries to compare companies because pricing can differ considerably even when the benefits under the same letter are standardized.
That makes insurer selection important even after someone decides Medigap is the right structure. The cheapest first-year premium is not necessarily the best long-term value. Historical rate increases, available household discounts and pricing methodology can all deserve attention.
Plan G and Plan N Appeal to People Who Want Predictability
Plan G and Plan N are among the most commonly discussed Medigap options because both can significantly reduce the out-of-pocket gaps left by Original Medicare. Plan G generally provides broader cost-sharing protection, while Plan N can have lower premiums but requires some office and emergency-room copayments and does not cover Part B excess charges.
Neither plan eliminates the Medicare Part B premium, and beneficiaries still need separate Part D prescription coverage if they want outpatient drug insurance. Medigap plans sold today do not include prescription drug coverage.
The value proposition is therefore not simply “pay a premium and everything is free.” It is paying an additional premium in exchange for more predictable medical cost sharing and broad access to providers that accept Medicare. Whether that is worth the cost depends on the beneficiary’s priorities and budget.
Medicare Advantage Can Be the Better Fit for Some Retirees
It is equally important not to characterize Medicare Advantage as inherently bad coverage. Many beneficiaries value the lower premiums, annual out-of-pocket maximum and additional dental, vision, hearing or fitness benefits that may be included. Plans can work especially well when the beneficiary’s preferred doctors and hospitals are in network.
Some retirees also have other forms of coverage that influence the decision. Military retirees with TRICARE for Life, veterans using VA services, federal retirees and people with employer retiree benefits can have very different needs from someone relying entirely on Medicare. In those situations, Medicare Advantage may interact with existing benefits in ways that make the choice more attractive or less attractive.
The plan should therefore be evaluated as part of the retiree’s entire health-insurance structure. A strategy that works perfectly for one person may be unnecessarily expensive or restrictive for another. Medicare decisions become more useful when they are based on individual circumstances rather than a blanket preference for one system.
Consider the Worst Year, Not Just the Best Year
A retiree comparing Medicare options should not model only a healthy year. A more useful exercise is to estimate the cost of coverage during a year involving specialist visits, diagnostic imaging, outpatient surgery or hospitalization. That provides a much clearer picture of the financial risk being accepted.
With Medigap, the annual premium may be higher, but covered medical expenses can be more predictable. With Medicare Advantage, premiums can be lower while cost sharing rises as more care is used, subject to the plan’s annual out-of-pocket maximum for covered Part A and Part B services. The relevant comparison is therefore total potential annual cost rather than premium alone.
Someone with substantial savings may be comfortable accepting several thousand dollars of possible cost sharing in exchange for lower premiums. Someone living on a tight fixed income may prefer predictable monthly expenses even if the total expected cost is somewhat higher. Affordability is as much about cash-flow stability as it is about the average dollar amount.
Think About Retirement Inflation
Medicare planning also needs to account for the fact that retirement can last decades. Premiums for Part B, Part D, Medigap and Medicare Advantage can change over time, as can deductibles and cost-sharing requirements. A plan that comfortably fits the budget at 65 may become more challenging at 80.
That makes healthcare inflation an important part of retirement planning. Rather than assuming today’s $200 monthly supplement premium remains $200 forever, retirees should test what happens if premiums increase over time. The objective is not to predict exact future premiums but to make sure the retirement plan has enough margin to absorb increases.
This becomes especially important for people choosing Medigap because they want long-term certainty. The policy may be guaranteed renewable, but the premium is not guaranteed to remain unchanged. A strong plan should be affordable even after reasonable future increases.
The Cheapest Plan Can Become Expensive if It Limits the Care You Want
Healthcare insurance has value beyond the amount paid in premiums. Provider access, ease of obtaining specialist care, prior authorization rules and financial predictability can all become more valuable after a serious diagnosis. Those factors are difficult to measure when someone is healthy.
That does not mean everyone should pay more for coverage they may never use. It does mean price should not be viewed in isolation. A $0-premium plan that includes the doctors and benefits someone wants can be an excellent value, while a similarly priced plan with the wrong network can be a poor fit.
The same principle applies to Medigap. A retiree should not stretch the budget dangerously just to purchase the most comprehensive supplement. Better insurance is not financially better if paying for it prevents the household from covering food, housing or other essential expenses.
Ask Whether You Can Afford the Plan in Both Good Health and Bad Health
The best Medicare choice should work under more than one health scenario. Ask what happens if you remain healthy for the next decade, but also consider what happens if you develop cancer, need repeated specialist care or require rehabilitation after a hospital stay. Coverage becomes more valuable when the unexpected happens.
With Medicare Advantage, examine the network, prior-authorization rules and maximum out-of-pocket exposure. With Medigap, examine the premium today, how the insurer prices the policy and whether future increases are realistic within the retirement budget. Both choices involve trade-offs.
This exercise can prevent a common mistake: choosing solely for the healthy person you are today. Medicare coverage is purchased partly to protect the person you may become later.
The Most Important Medicare Decision May Be the One You Can Keep
The question “Can you afford this Medicare plan?” should not be answered by looking only at the first month’s premium. It should include provider access, cost sharing, prescription coverage, future flexibility and the possibility that health changes substantially. The cheapest plan today is not necessarily the cheapest plan over an entire retirement.
Medicare Advantage can be an excellent fit for people who value low premiums and are comfortable using a plan’s network and utilization-management rules. Original Medicare with Medigap can be attractive for people willing to pay more for broad provider access and more predictable medical expenses. Neither choice is universally right.
The most important decision is choosing coverage that matches both your healthcare preferences and your financial reality. If the premium does not fit the budget, the plan is not sustainable. If the coverage restrictions do not fit the way you want to receive care, a low premium alone may not make it a bargain.
