Medicare 2026

How Medigap Premiums Are Priced: Community, Issue-Age, and Attained-Age Rating

If you're looking at a Medicare Supplement Insurance (Medigap) policy to go with Original Medicare, one of the most important things to understand isn't just the monthly premium today — it's how that premium is calculated, and how it might change over time. Insurers use one of three pricing methods, and the method matters as much as the sticker price.

Here's the plain-English version of how it works.

The three Medigap pricing methods

Federal rules let insurers choose among three ways to price a Medigap policy. Every method is legal; they just distribute costs differently across ages.

1. Community-rated (also called "no-age-rated") Everyone who buys the same policy from the same insurer pays the same base premium, regardless of age. A 68-year-old and an 80-year-old pay the same starting price for the same lettered plan from that insurer.

The appeal: your premium doesn't go up just because you had a birthday. The trade-off: the starting premium is often higher than age-based pricing would be at the youngest ages, because the insurer is averaging costs across its whole community of policyholders.

2. Issue-age-rated Your premium is based on the age you were when you first bought the policy, and it doesn't go up as you get older. If you buy at 65, your base premium is set at the "age 65" level and stays tied to that starting point, even at 75 or 85.

The appeal: buying earlier locks in a lower age-based starting point. The trade-off: if you wait to enroll, you'll start at a higher age-based rate — and switching policies later essentially resets the clock at your then-current age.

3. Attained-age-rated Your premium is based on your current age and goes up as you get older. The policy might look very affordable at 65 and considerably more expensive at 80.

The appeal: the lowest starting premium of the three, in many cases. The trade-off: automatic increases built into the pricing structure as you age, on top of any other increases.

"Flat" doesn't mean frozen

A common misunderstanding: people hear "community-rated" or "issue-age-rated" and assume the premium will never change. That's not quite right.

Under any of the three methods, premiums can still rise for inflation, rising medical costs, claims experience, and other factors the insurer builds into its rate filings. What differs is whether age itself is a built-in driver of increases.

So when you compare quotes, it's worth asking the insurer:

• Which pricing method does this policy use?
• What has the premium history looked like over the last several years?
• What factors can trigger an increase?

Same benefits, different prices

Here's a point that trips up a lot of first-time shoppers. Medigap plans are standardized by letter (Plan G, Plan N, and so on). A given lettered plan has the same federally defined benefits no matter which company sells it. Plan G from Insurer A covers the same things as Plan G from Insurer B.

What differs between insurers is:

• The premium amount
• The pricing method (community, issue-age, or attained-age)
• Customer service, billing, and other service details

That means when you're comparing two quotes for the same letter plan, you're really comparing price, pricing method, and the company behind the policy — not the benefits.

State rules can change the picture

Some states require insurers to use community rating or otherwise limit how Medigap can be priced. In those states, the three-method menu may not fully apply, and other consumer protections may change what and when you can buy. Rules about guaranteed issue rights, open enrollment, and switching policies can also vary.

Because this is a national explainer, we're not naming states — but before you shop, confirm the Medigap rules where you live by checking Medicare.gov or calling 1-800-MEDICARE.

How this fits the bigger Medicare decision

Medigap only works with Original Medicare — not with Medicare Advantage. As you weigh your options, it helps to remember the broad trade-offs:

• Original Medicare + a Medigap policy + a stand-alone Part D plan: typically broader provider access nationwide, more predictable out-of-pocket costs depending on the Medigap plan chosen, but usually higher monthly premiums overall.
• Medicare Advantage: often lower or $0 monthly plan premiums with extra benefits packaged in, but with network rules, prior authorization, and out-of-pocket costs that vary by plan.

Neither path is "better" — they're different structures. The right fit depends on your health, your budget, your providers, and how you feel about predictability versus flexibility.

A few 2027 program facts worth knowing

While you're thinking about costs, a few national Medicare numbers for 2027 are already set:

• The Part D out-of-pocket cap is $2,400 in 2027 (it's $2,100 in 2026).
• The maximum Part D deductible a plan may charge in 2027 is $700.
• The Part D base beneficiary premium for 2027 is $41.33 (used in the late-enrollment penalty calculation; actual plan premiums are set plan by plan).
• Annual Enrollment for 2027 runs October 15 – December 7, 2026, with coverage effective January 1, 2027.
• Social Security announced a 3.6% COLA for benefits payable beginning January 2027.

The 2027 Part B standard premium and deductible, and the 2027 IRMAA income brackets, had not been announced as of this writing. CMS typically releases those figures in the fall. Don't rely on estimates — wait for the official announcement.

Where to go next

For the official rules on Medigap pricing, enrollment, and state-specific protections, visit Medicare.gov or call 1-800-MEDICARE (1-800-633-4227), TTY 1-877-486-2048, 24 hours a day, 7 days a week. They can walk you through what's available where you live and what rules apply to you.

This article is educational only. It is not insurance advice and is not affiliated with any government agency.