Retire at 58 and Medicare is seven years away. Those years have to be paid for out of the same savings that were supposed to last thirty more — and for most teachers who retire early, this is the largest line item nobody planned for.
Free to run. Pro adds the year-by-year breakdown and the retire-later comparison.
How to use it
Set the age you actually plan to stop working. Medicare starts at 65 regardless; everything between is the bridge.
Pick where cover comes from. The premium field pre-fills with a typical figure — replace it with a real quote. For marketplace plans that is healthcare.gov; for a district retiree plan, your benefits office has the retiree rate, which is usually far higher than the active-employee rate you pay now.
Add out-of-pocket costs. Premiums are not the bill. Deductibles, copays and prescriptions typically add thousands a year.
Count everyone the plan covers. A spouse under 65 doubles it.
COBRA lasts 18 months, not until 65 — useful for a short bridge, never for a long one.
Total cost of the bridge
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Average monthly cost
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premiums plus out-of-pocket, averaged
Gap to Medicare
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Medicare eligibility starts at 65
Year by year
Age
Premiums
Subsidy
Out of pocket
Total
Premiums total
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Out-of-pocket total
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Share of your 403(b)
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Work 1 more year
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saved on the bridge alone — before the extra pension credit
Work 2 more years
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the cheapest bridge years are the ones removed, so this is a floor
subtract this cost from your balance and re-run the projection
See where the money actually goes
Pro adds the year-by-year cost table, premiums versus out-of-pocket, what share of your 403(b) the bridge consumes, and what working one or two more years saves on health cover alone.
Why this is the number that breaks early-retirement plans
Most retirement planning stops at income: pension, 403(b), Social Security. Health cover is treated as a detail. For a teacher retiring at 58, five to seven years of private cover for a couple can run past $150,000 — comparable to the entire 403(b) balance many teachers retire with, and payable in exactly the years the portfolio can least afford it.
It is also the cost that most rewards a small delay. One more year of work does three things at once: it removes the most expensive kind of spending year, adds service credit to the pension, and gives the balance another year to compound. The comparison above prices only the first of those — the other two are on top.
What this does and does not model
Does: premiums and out-of-pocket costs for everyone on the plan, compounding at your assumed medical inflation rate, from your retirement age to 65.
Does not: decide whether you qualify for a marketplace subsidy. Eligibility turns on household size, income relative to the federal poverty level, and rules that change — a hardcoded schedule would be wrong within a year and wrong quietly. The cap is yours to set, from your own healthcare.gov quote.
Does not: model a spouse who reaches 65 before you do, or Medicare premiums and supplements after 65.
Does not: account for state-specific retiree health subsidies. Several state systems pay part of the retiree premium — check yours, it can change the answer entirely.
Related tools
Retirement Projection Suite — subtract the bridge cost from your starting balance and see what it does to the odds.
Educational estimates only, not insurance or financial advice. Premiums vary enormously by state, age, plan tier and household. Get real quotes before making a retirement date decision.