Include Part B and D premiums, possible Medicare Advantage alternatives, and typical copays across your providers. Consider income‑related adjustments that raise premiums for higher earners. Compare formularies for recurring medications, price preferred pharmacies, and remember dental implants or hearing aids often require separate planning beyond basic Medicare coverage.
Medical costs historically outpace general inflation, so test higher assumptions. Build ranges, not single guesses, and revisit annually. Pair conservative return estimates with realistic cost growth, then check whether your HSA contributions and investments are tracking toward needs, adjusting early rather than scrambling late under pressure.
Run playbooks for surgeries, specialty drugs, or caregiving leave. Model a bear market early in retirement and a surprise premium hike. Plan how you would pause reimbursements, rebuild cash buffers, or temporarily shift asset allocation, so adversity becomes navigable steps instead of frightening, paralyzing guesswork.