Is High-Deductible Plan G Worth It? Look Beyond the Monthly Premium

If you have Medicare Supplement Plan G, you've probably noticed that your premiums don't stay the same from year to year. As those costs rise, switching to a high-deductible version of Plan G may seem like an appealing way to save money. And while the lower monthly premium can offer meaningful savings, there's more to consider before making the switch. High-deductible Plan G requires you to pay more out of pocket for medical care before your supplemental coverage kicks in. Depending on how much care you need throughout the year, those additional expenses could offset some or all of your premium savings.

How Does High-Deductible Plan G Compare to Standard Plan G?

Both versions of Plan G are designed to help cover certain expenses that Original Medicare doesn't pay. Standard Plan G generally covers the Medicare-approved cost sharing included in the policy, except for the annual Medicare Part B deductible. In 2026, that deductible is $283.

High-deductible Plan G offers the same categories of benefits, but you must first meet a substantially higher deductible before the policy begins paying those benefits. For 2026, that amount is $2,950. Medicare-covered deductibles, coinsurance and copayments generally count toward that amount, including the Part B deductible.

In exchange, the monthly premium is typically much lower. That can be appealing, particularly for someone who rarely visits the doctor. But health care expenses aren't always predictable, and you don't need a serious illness to have a costly year.

An injury that requires imaging and physical therapy, a series of specialist appointments or diagnostic testing for a new symptom can add up quickly. Even people who consider themselves healthy may find themselves using more medical care than expected. While Medicare covers many preventive services without cost sharing when certain requirements are met, diagnostic testing and treatment can still involve deductibles and coinsurance.

The question becomes whether the premium savings are enough to justify the additional costs you may have to cover.

Looking at the Full Cost of Coverage

Consider a hypothetical example. If standard Plan G costs $300 per month and high-deductible Plan G costs $140, switching would save $1,920 in annual premiums.

That sounds attractive, especially if you expect relatively little medical care. But those savings need to be weighed against the additional out-of-pocket expenses you could face under the high-deductible policy.

Rather than comparing premiums alone, consider the total annual cost under each option. Look at what you would pay in a relatively healthy year, a year with several doctor visits or treatments, and a year when you reach the high deductible. Remember that the deductible is based on applicable Medicare cost sharing, not necessarily the full amount providers bill.

There's also the question of how those expenses would affect your retirement budget. Would a larger medical bill be manageable from your cash reserves, or would it require an unexpected withdrawal from investments? And would knowing that more of the initial cost is coming out of your pocket make you hesitate to seek care?

For some retirees, accepting more potential out-of-pocket costs in exchange for lower premiums may be a reasonable choice. Others may prefer paying a higher premium for more predictable expenses.

Why Switching Back May Not Be So Simple

One of the most important considerations has little to do with the deductible itself. It's what happens if you choose high-deductible Plan G now and decide later that you'd prefer standard Plan G.

Unlike Medicare Advantage and Part D plans, Medigap policies don't generally offer an annual enrollment period during which you can freely switch coverage without medical underwriting.

Your federal Medigap Open Enrollment Period lasts six months, beginning when you're 65 or older and enrolled in Medicare Part B. During that time, you have important protections when purchasing a Medigap policy. Outside that window, insurers may use medical underwriting unless you qualify for guaranteed-issue rights or additional protections under your state's laws.

As a result, someone who switches to high-deductible Plan G may not be able to return to standard Plan G later on the same terms, particularly if their health has changed.

That possibility deserves consideration before making a change. State rules vary, and it's worth reviewing the protections available where you live before replacing an existing policy.

Making Health Care Part of Your Retirement Budget

The challenge with choosing Medicare coverage is that you're making a decision today about expenses you can't fully predict. Your health may remain stable for years, or your needs may change unexpectedly. Meanwhile, premiums and other health care costs can continue to rise throughout retirement.

A lower-premium policy may be a reasonable fit if you have the financial flexibility to absorb a higher deductible and are comfortable with that uncertainty. If you expect regular medical care or place a higher value on predictable expenses, standard Plan G may be more appealing.

Neither choice is automatically right for everyone. The important part is understanding the tradeoff and considering how it fits into your overall retirement finances.

Health care is one of the expenses that can shape how much of your retirement savings you'll need over time. Reviewing insurance premiums, potential out-of-pocket costs and your ability to handle unexpected expenses can help you make coverage decisions with a clearer understanding of their long-term impact.