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Medigap Cost Calculator

Estimate Medigap (Medicare Supplement) premiums by plan letter, age, and state — Plan G vs Plan N total cost comparison.

Short answer

Medigap Cost Calculator

$145Estimated monthly Medigap premium

Plan G covers everything except the Part B deductible (~$283/yr); Plan N trades ~$30/mo of premium for $20 office copays and $50 ER copays. Heavy users break even on G quickly — at 10+ visits a year, G usually wins.

How it's calculated: Plan G at age 65 in a average-cost state. Adjust the inputs below to recalculate for your own numbers.

Disclaimer: Estimates only — not insurance, tax, or legal advice. Actual premiums depend on underwriting, state, carrier, claims history, and plan details. Confirm numbers with a licensed agent, broker, or Healthcare.gov before acting.

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Formula used

Premium = base(plan) × age factor × state factor

Plans are federally standardized — Plan G is Plan G from any carrier — so you shop on price and rate stability. Attained-age pricing rises ~3–5% per year as you age, on top of medical inflation.

Medigap premium = base rate × (1.045)^(age−65) × state multiplier
Plan G at 65 (avg state)
~$145/mo
Plan G at 75
~$220/mo
Out-of-pocket (G)
Part B deductible only
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Plan G vs Plan N — the only decision most people face

Since Plan F closed to new enrollees in 2020, Plan G is the most comprehensive option: it pays every Medicare gap except the ~$283 Part B deductible. Plan N costs ~25% less but adds copays and doesn't cover Part B excess charges — fine in states that ban excess charges, risky elsewhere.

  • Buy in your 6-month open-enrollment window at 65 — guaranteed issue, no underwriting.
  • After that window, most states let carriers medically underwrite you.
  • The same Plan G can differ by $100+/mo between carriers — benefits are identical.

FAQ

How much does Medigap Plan G cost?

Roughly $145/month at 65 in an average state, rising to ~$220 by 75 under attained-age pricing. Low-cost states (WI, IA) run 15% under; high-cost states (FL, NY, CT) 25% over.

Is Plan G or Plan N better?

Plan G for peace of mind and heavy use; Plan N saves ~$360/yr but adds $20 office and $50 ER copays and exposes you to Part B excess charges (up to 15% above Medicare rates). If you see doctors monthly, G usually nets out cheaper.

When should I buy Medigap?

During your 6-month Medigap Open Enrollment starting the month you turn 65 and have Part B — carriers cannot deny or surcharge you. Miss it, and in most states you can be declined for health reasons forever.

How this calculator is built

Independently maintained

Written by Sam Doshi and the RevenueLab editorial team. We don't sell the data feeds this tool is built on.

Sourced from primary data

Benchmarks come from public AdSense / Stripe / IRS disclosures and reader-submitted data — never third-party "$X per view" claims. Full methodology.

Last editorial review

Reviewed on a rolling quarterly cycle. Dated reviews are published on the methodology record for each calculator.

Editorial standards

See our editorial policy and disclaimer. Results are estimates, not advice.

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