Reviewed by Russell Noga, Licensed Medicare Insurance Broker (all 50 states) — Last updated October 1, 2026

Medicare Supplement Plan G is the plan where price matters most. Every carrier’s Plan G pays exactly the same benefits, because Medigap plans are standardized by federal law. The only real difference between one Plan G policy and another is what you pay for it.

Carriers file Medigap premiums state by state throughout the year, so there is no single 2027 Plan G rate yet. Here is what we do know. The national average Plan G premium rose from about $159 a month in 2025 to about $180 a month in 2026 for a 65-year-old woman who doesn’t smoke, according to ValuePenguin. Plan G rate increases averaged 16.8% across the industry in 2026, according to Telos Actuarial.

This guide breaks down what drives your Plan G cost in 2027, how age and state change the price, and the total yearly amount to budget for. For a full look at what the plan covers, see our Medicare Supplement Plan G 2027 guide.Searching for Medicare Part G? It’s the same thing as Plan G. See our guide to Medicare Part G in 2027 for what it costs and what it covers.

For years, Medigap rate increases ran in the low single digits, roughly 3% to 5% a year. That has changed. In 2026, Plan G rate increases at six of the largest carriers ran from just over 12% to more than 26%, and the industry average reached 16.8%, according to Telos Actuarial.

Several forces are pushing Plan G premiums up at the same time: more medical services used per person, higher hospital and provider costs, people with higher health needs moving from Medicare Advantage back to Medigap, and state rules that let policyholders switch plans without medical questions. Telos expects higher rate actions to continue as carriers work to improve their loss ratios.

For a closer look at the size of recent increases and what to do when your rate goes up, see our guide to Plan G rate increases in 2027.

Age is one of the biggest factors in what you pay for Plan G, but how much it matters depends on the pricing method the carrier uses in your state. Across all Medigap plans, MoneyGeek puts the average premium at $189 a month at age 65 and $238 a month by age 75.

People often search Plan G prices by exact age, such as a 65-year-old man or a 77-year-old woman. The honest answer is that the price at any age depends on the carrier, the pricing method, your ZIP code, your gender and whether you use tobacco. A quote for your exact age and ZIP code is the only reliable number.

Medigap premiums are filed and approved state by state, so where you live has a large effect on your Plan G cost. Even within one state, the spread between carriers selling identical coverage can be wide.

New Jersey’s September 2026 state rate chart is a good example. For a 65-year-old man, the monthly Plan G premium ranged from $164.31 to $299.88 across the carriers listed. That is a difference of more than $135 a month for exactly the same benefits.

Rate increases also vary by state. ValuePenguin found that Oklahoma saw the largest average Plan G increase of any state in 2026, about 22%, with the average monthly premium rising from $130 to $158.

Because every Plan G pays the same benefits, comparing carriers in your own state is the most direct way to lower your Plan G cost.

The Plan G premium is only part of what you pay each year. To budget for 2027, add your Part B premium, your Plan G premium and the Part B deductible. Here is a projected example using the national average Plan G premium.

That total covers your Medicare-approved hospital and medical care for the year, with no network restrictions. It does not include prescription drugs. You’ll need a separate Part D plan, and for 2027 that plan carries a $2,400 annual out-of-pocket cap with a $700 standard deductible. Your own Plan G premium may be higher or lower than the average depending on your age, state and carrier.