Comprehensive Guide
Learn more in our Insurance Guide.
How it works
Medigap plans are standardized by letter - every carrier's Plan G covers the same gaps - so the real shopping variable is price structure: monthly premium versus deductible versus copays. That standardization makes the choice unusually computable, and this framework computes it while staying deliberately letter-neutral: enter any two quotes' premiums and deductibles along with your expected annual covered charges, and the engine totals each design's first-year cost, finds the usage level where the two cross, and extends the comparison across your holding horizon. The structural insight it surfaces is that high-deductible designs win in low-cost years and lose in heavy ones: their premium saving is certain while their deductible risk is bounded, so the breakeven covered-charges figure tells you exactly how sick a year must get before the richer design repays its extra premium. Two cautions frame honest use. Copay differences between plans shift these totals - hold them equal or add the expected difference manually before trusting the verdict. And Medigap pricing itself drifts: community-rated, issue-age-rated and attained-age-rated carriers age very differently, so a quote that wins today can lose within a decade of renewals. This tool teaches the arithmetic; plan selection deserves quotes from multiple carriers and confirmation of current rules at Medicare.gov.Formula
cost = premium x 12 + min(covered charges, deductible) | breakeven charges solve cost(A) = cost(B) | horizon advantage = (cheaper annual cost) x years
Tips
- Hold copays equal between the two quotes or add expected copay differences manually first.
- The breakeven figure, not the first-year verdict, is the durable answer - health costs trend upward with age.
- Ask each carrier how they rate age: issue-age pricing locks today's premium logic; attained-age rises steeply.
- Household discounts of 5-15% exist at many carriers even when only one spouse enrolls.
- Confirm current plan availability and rules at Medicare.gov - this framework educates on math, not selection.
Frequently asked questions
How do I compare two Medigap quotes fairly?
Total each design's realistic annual cost: twelve months of premium plus whatever deductible and copays your expected usage triggers, then extend across the years you expect to keep the plan. Premium-only comparisons flatter cheap attained-age policies whose rates climb fastest; deductible-only comparisons ignore the certain monthly saving.
Is a high-deductible Medigap plan worth it?
It wins when years stay medically quiet: the premium saving is guaranteed while the large deductible bites only in heavy years. On these defaults the cheaper-premium design saves about $456 annually until covered charges exceed that gap, after which the full-deductible design pulls ahead permanently for that year.
Why do identical Medigap plans have different prices?
Because plans are standardized by benefit but not by price. Carriers rate differently - community-rated pools everyone together, issue-age locks your entry age forever, attained-age raises premiums as you age - and load different household discounts and underwriting. Identical letters can diverge by hundreds of dollars annually within one ZIP code.
What does 'covered charges' mean in this framework?
The amount providers bill for Medicare-approved services during the year before supplement cost-sharing applies - roughly what Medicare allows. It is not what you pay; it is the base the deductible applies against. Higher expected charges push the comparison toward lower-deductible designs; quiet years favor premium savings.
Can I switch Medigap plans later?
Outside your initial six-month open enrollment, switching usually requires medical underwriting except when returning to a guaranteed-issue window - which makes the first choice stickier than most insurance decisions. That permanence is why comparing structures carefully now matters more than finding the cheapest first-year quote.