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Cheapest Medicare Supplement Plan: What’s Actually Worth It

The Cheapest Medigap Plan Is Plan A — But That Doesn’t Mean You Should Buy It

Plan A is the cheapest Medicare supplement plan available in 2026, with premiums often running $60–$100/month for a 65-year-old depending on your state. Every insurance company that sells Medigap is legally required to offer it. That’s by design — it’s the bare-bones baseline the government mandated insurers carry.

But here’s the thing. Cheap monthly premium doesn’t mean cheap overall. Plan A covers almost nothing beyond Original Medicare’s most basic gaps. You get coverage for your Medicare Part A coinsurance and hospital costs, your Part B coinsurance, the first three pints of blood, and hospice care coinsurance. That’s it. No coverage for the 2026 Part A deductible ($1,676 per benefit period). No Part B deductible coverage. No skilled nursing facility coinsurance. No foreign travel emergency.

For someone who’s healthy and rarely uses healthcare, that might sound fine. But Medicare is specifically the insurance you have when you’re old enough to need it regularly. The math on Plan A usually doesn’t work in your favor for long.

So yes, I’ll tell you what the cheapest plans are. But I’m also going to tell you what I actually think you should do with that information.

Here’s How the Low-Cost Plans Stack Up

There are several plans worth considering if you’re watching your budget. Plans A, K, and L are the most affordable by premium. High-Deductible Plan G is a different animal — lower monthly cost with more protection than you’d expect. Here’s how they compare:

Plan Avg Monthly Premium (Age 65) Part A Deductible Part B Deductible Skilled Nursing Coverage Out-of-Pocket Maximum (2026)
Plan A $60–$100 Not covered Not covered Not covered None (unlimited exposure)
Plan K $70–$110 50% covered Not covered 50% covered $7,220
Plan L $100–$145 75% covered Not covered 75% covered $3,610
High-Deductible Plan G $30–$75 Covered after deductible Covered after deductible Covered after deductible $2,870 (the 2026 deductible)
Standard Plan G $100–$200 Covered Not covered Covered Only Part B deductible ($257 in 2026)

That table tells an interesting story. High-Deductible Plan G has the lowest premium of any plan that actually provides real protection. For a 65-year-old in Ohio, I’ve seen HD Plan G priced at $35–$55/month depending on the insurer. Standard Plan G in the same state often runs $130–$165/month. That’s a difference of roughly $1,000–$1,500 per year in premiums alone.

Plans K and L don’t get talked about much, and honestly, they don’t deserve more attention than they get. The partial coverage model — where the plan pays 50% or 75% of certain costs — is confusing and doesn’t give you the clean protection most people want. You’re still exposed to significant costs, you just don’t know exactly how much until the bills come in.

High-Deductible Plan G Is the One I’d Actually Recommend for Budget-Conscious People

If your goal is the lowest possible monthly premium with real catastrophic protection, High-Deductible Plan G is the answer for most people. Here’s why it works: you pay a $2,870 annual deductible in 2026 before the plan kicks in, but once you hit that deductible, everything Plan G normally covers is fully covered. And standard Plan G covers almost everything.

Think about what that actually means. If you have a bad year — a hospitalization, a surgery, a serious diagnosis — your maximum out-of-pocket is $2,870. That’s it. No worrying about whether you’ve hit enough benefit periods. No calculating percentages. Just a clean ceiling on your exposure.

Compare that to someone on Plan A with a major hospitalization. The 2026 Part A deductible is $1,676 per benefit period — and if you have two separate hospitalizations more than 60 days apart, that’s $3,352 just in deductibles. Add in anything else that Plan A doesn’t cover, and you’re in worse shape financially than the person who paid for HD Plan G all year.

That said, HD Plan G isn’t perfect for everyone. If you’re managing multiple chronic conditions and regularly hitting high medical costs each year, Standard Plan G’s predictability might be worth the extra $80–$120/month. There’s real value in knowing your only out-of-pocket cost is the 2026 Part B deductible of $257. For someone with three or four specialist visits a year and no major health issues, though, HD Plan G almost always wins on total cost.

The Mistake I See People Make All the Time

People compare Medigap plans by monthly premium and stop there. I’ve seen this happen over and over. Someone picks Plan A because it’s $60/month and feels proud of themselves for saving money. Then they have one hospital stay and discover they owe $1,676 for the Part A deductible, plus daily coinsurance if they’re there beyond 60 days, plus whatever else their plan doesn’t cover.

That’s not saving money. That’s just moving the cost from your monthly premium to a surprise bill.

The right comparison is total annual cost, not just premium. Add up 12 months of premiums, then add your realistic out-of-pocket exposure under each plan. For most people, the number looks like this:

When you look at it that way, Plan A’s “savings” disappear fast. And HD Plan G starts looking like the rational choice for anyone who doesn’t expect heavy medical use but wants real protection against disaster.

The second mistake is assuming all insurance companies price plans the same way. They don’t. Two companies selling identical HD Plan G benefits in the same state can charge wildly different premiums. The coverage is standardized by law, but the price isn’t. Always get quotes from multiple insurers. A broker who specializes in Medicare supplements can pull multiple quotes at once, and that’s worth doing.

When “Cheap” Should Mean Something Different

If you’re in a state that still allows Medicare SELECT plans, those are another way to get lower premiums. SELECT plans require you to use a network of hospitals and providers in exchange for reduced premiums. They can be 10–20% cheaper than standard Medigap options. The tradeoff is real, though: if you travel often, spend winters in another state, or want flexibility to see any Medicare-accepting doctor in the country, SELECT plans can create problems.

There’s also the question of when you’re enrolling. If you’re enrolling during your Initial Enrollment Period when you first get Medicare Part B, you have guaranteed issue rights. That means no insurer can turn you down or charge you more because of pre-existing conditions. That window is when you should lock in the best plan you can afford, because if you try to switch later in most states, you can be medically underwritten and either denied or charged significantly more.

Some states — California, Connecticut, Massachusetts, Maine, New York, and a handful of others — have their own guaranteed issue protections that go beyond federal rules. If you’re in one of those states, you have more flexibility to switch plans later without health-based penalties. That can change the math on which plan to start with.

Bottom Line

If you want the cheapest Medicare supplement plan in terms of raw monthly premium, Plan A is technically it. But for most people, that’s the wrong choice. High-Deductible Plan G gives you genuinely low premiums — often $30–$75/month at age 65 — with a hard cap on your annual exposure at the 2026 deductible of $2,870. For a healthy 65-year-old who wants real protection without overpaying, it’s the plan I’d point you toward first. Get quotes from at least three insurers, because the coverage is identical but the price varies more than you’d expect.

Frequently Asked Questions

Is there a Medicare supplement plan with no monthly premium?

No. Every Medigap plan has a monthly premium. If you’re seeing ads for “free” Medicare plans, those are Medicare Advantage plans, which are entirely different from Medigap. Medicare Advantage replaces Original Medicare. Medigap supplements it. They don’t work together.

Can I switch to a cheaper Medigap plan after I’ve had health issues?

In most states, you can be medically underwritten if you try to switch outside of your initial enrollment window or certain qualifying life events. That means an insurer can review your health history and either deny you or charge more. If you’re in California, New York, Connecticut, Maine, or a few other states with stronger consumer protections, you may have more flexibility. Check your state’s specific rules before assuming you can freely switch.

Does the cheapest plan still cover doctor visits?

All Medigap plans cover the 20% coinsurance that Medicare Part B doesn’t pay for doctor visits. So yes, even Plan A covers that. What it doesn’t cover is your Part B deductible, which is $257 in 2026. You pay that first before Medicare starts sharing costs. For most people with just a few doctor visits a year, that’s manageable. It’s the hospital and skilled nursing exposure where Plan A falls apart.

Is High-Deductible Plan G available in all states?

HD Plan G is available in most states, but not every insurance company offers it in every market. Some states have fewer carriers selling it, which means less competition and potentially higher prices. It’s worth asking specifically for HD Plan G quotes when you’re shopping, because some brokers default to showing you standard plans unless you ask. The plan has been available since 2020 and is becoming more widely offered, but availability varies.

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