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Why do Medigap prices differ by company for the same plan?

The coverage is identical by law. The price is not. Here is what actually explains the gap.

Updated August 17, 2026 · 2 min read

It is a fair question, and it is the one that makes people suspicious that they are missing something in the fine print. They are not. There is no fine print.

Federal law standardizes Medigap benefits. Plan G is Plan G everywhere. The differences are entirely in how each company prices and manages its business.

What actually drives the difference

• Pricing method. Attained age, issue age or community rated produce very different premiums at 65 and very different ones at 80.
• Underwriting standards. A carrier that accepts more health conditions has higher claims, and prices accordingly.
• Claims experience in that block of business, which varies by carrier and by state.
• Market strategy. Some carriers price low to attract new members and raise rates later. Others price steadily.
• Administrative costs and how much they spend acquiring customers.
• Discounts offered, such as household, non tobacco and annual payment.

The closed block effect

When a plan closes to new members, its pool ages together with no younger, healthier entrants. Claims rise and premiums follow, compounding over time.

This is why Plan F policies, closed to people newly eligible after 2020, often see steeper increases than an equivalent Plan G. See Plan F versus Plan G.

What is not different

• The benefits. Identical by law for the same letter.
• The provider network. There is none. Any doctor that accepts Medicare.
• The claims process. Medicare pays first and forwards the balance automatically.
• Whether they can cancel you. All Medigap policies are guaranteed renewable.

How to judge a low quote

1. Ask which pricing method it uses. A low attained age quote at 65 may be the most expensive option at 80.
2. Ask about the rate increase history over the past several years.
3. Ask whether the quote includes a first year discount that disappears afterward.
4. Check the carrier's financial strength rating.
5. Ask how long they have offered Medigap in Texas.

A low price from a stable carrier with a moderate rate history is simply a good deal. A low price from a carrier with a pattern of sharp increases is a deferred cost.

The practical takeaway

Since the product is identical, there is no reason to pay more than you must, and no reason to be nervous about the cheaper option once you have checked the rate history and pricing method.

The thing that stops people from acting on this is underwriting. Switching later requires passing health questions in Texas, so getting the pricing right during your open enrollment window is worth more than getting it right later.

See how to compare properly and your open enrollment window.