Should You Max Your HSA — and What Will Healthcare Cost in Retirement?

Why the HSA is the best retirement account most people ignore

An HSA is the only account that is tax-deductible going in, grows tax-free, and comes out tax-free when used for medical expenses — even decades later. Pair it with a high-deductible plan, pay current medical bills out of pocket, save your receipts, and let the HSA compound for 20+ years.

After age 65, HSA funds can be used for any expense (taxed like a Traditional IRA). It functions as both a healthcare slush fund and a stealth retirement account.

How to handle a large medical bill

Always negotiate. Hospitals routinely accept 30–60% of billed amounts in cash settlements. Itemize the bill, dispute coding errors, and ask for the cash-pay rate. Then weigh paying from emergency fund vs a 0% medical credit line vs HSA reimbursement of past expenses.

How PeakWorth models healthcare decisions

PeakWorth treats a maxed HSA as its own scenario — contributions deducted today, the balance invested and compounded tax-free at ~7%, and qualified withdrawals pulled tax-free for decades of medical costs — inside the same year-by-year deterministic simulation to age 95 that drives your whole plan.

It reports the result as a change in your PeakWorth (highest projected lifetime net worth) and FI Age, so 'should I max my HSA?' and 'can I afford to retire before Medicare?' become dated, dollar-and-year answers instead of a $315K scare number.