We total your expected healthcare spending from your current age through your planning horizon: premiums plus out-of-pocket costs, growing each year at a healthcare-inflation rate. The result is the lifetime figure — the number a retirement income plan needs to fund.

Step by step

1. Your first-year cost is your all-in monthly premiums × 12 plus your expected annual out-of-pocket spending.
2. Each subsequent year, the whole amount grows by the healthcare-inflation assumption (default 5%) — healthcare costs have historically outpaced general inflation.
3. The lifetime total is the sum of every year from your current age through the age you plan to.
4. The year-by-year curve is shown so the back-loaded shape of the cost is visible, not just the total.

The math

yearCost(y) = (monthlyPremiums × 12 + annualOutOfPocket) × (1 + inflation)^y; lifetime = Σ yearCost(y) for y = 0 … (planToAge − currentAge − 1).

Sources & assumptions

• CMS annual premium announcements (the Part B premium in the defaults).
• Public-domain compound-growth arithmetic; the healthcare-inflation rate is an on-screen, tenant-configurable assumption.

Note: Nothing proprietary — the full calculation is described here.

1. This projection is an educational estimate, not financial or insurance advice, and not a prediction of your actual healthcare costs.
2. It compounds today's premiums and out-of-pocket spending at a single healthcare-inflation assumption shown with your results; actual premiums, benefits, and health needs change yearly, and long-term care is not included.
3. The 2026 Part B premium referenced in the defaults changes each year.
4. This tool is not affiliated with or endorsed by Medicare, CMS, or any government agency.