Open enrollment. November 2019. A Boeing engineer named Craig sits in a conference room in Everett, Washington, staring at two health plan options on a laminated sheet. One plan costs him $180 a month in premiums. The other costs $60. Craig picks the cheaper one, pockets the difference in his checking account, and walks out thinking he made the smart call.

He did not.

What Craig missed was not on that laminated sheet. The $60 plan was a high-deductible health plan (HDHP) paired with a Health Savings Account. If Craig had understood what that account actually does, he would have been looking at one of the most powerful tax shelters available to any working American. Full stop.

The Case Against HDHPs: Side A Is Not Wrong

Let me give the critics their strongest argument, because they deserve it.

High-deductible health plans shift financial risk onto the patient. The 2024 IRS minimum deductible for an HDHP is $1,600 for individuals and $3,200 for families. Out-of-pocket maximums climb to $8,050 and $16,100 respectively. For a household already living paycheck to paycheck, that exposure is not a wealth-building tool. It is a debt trap.

A 2023 report from the Kaiser Family Foundation found that 40% of American adults could not cover an unexpected $400 expense without borrowing money. For those households, a $3,200 deductible is not a manageable inconvenience. It is a financial emergency waiting to happen.

When did you last calculate what your actual out-of-pocket exposure would be in a bad health year, using your real income and your real savings balance? Most people have not done that math.

Warning: An HDHP is not appropriate for everyone. If you have a chronic condition, take expensive maintenance medications, or cannot absorb a $1,600 to $3,200 deductible without going into debt, a lower-deductible plan may cost you less in real terms, even if the monthly premium is higher. Run the total-cost comparison before choosing.

Side A is right that HDHPs are the wrong tool for the wrong person. The mistake is assuming that makes them the wrong tool, period.

The Case For HDHPs: Side B Has the Data

Here is the number that matters: $23,200.

That is the 2024 IRS family contribution limit for a Health Savings Account. For individuals, it is $4,150. Every dollar contributed is pre-tax. Every dollar grows tax-free. Every dollar withdrawn for qualified medical expenses is tax-free. That is a triple tax advantage that no 401(k) or Roth IRA can match.

According to the Employee Benefit Research Institute’s 2023 report, the average HSA balance sits at just $3,902. Most people are barely using this account. A smaller group of mostly high-income households has figured out what it actually does and they are running away with it.

A 2022 Devenir Research report found that HSA investment assets grew 57% in a single year, reaching $34.4 billion. That number is not driven by people paying copays. It is driven by people treating their HSA like a brokerage account.

The strategy is straightforward, and most people get this wrong by ignoring it completely. You contribute the maximum to your HSA. You pay every medical expense out of pocket with regular income. You invest the entire HSA balance in low-cost index funds. You save every receipt. Years later, you pull tax-free reimbursements for past medical expenses, with no time limit imposed by the IRS.

Sarah’s Story: What This Looks Like With Real Money

Sarah is a 38-year-old project manager in Austin. She earns $95,000 a year, is in good health, and has been on an HDHP for six years. Every year she contributes the individual maximum to her HSA. Every year she pays her routine medical bills out of pocket and keeps the receipts in a Google Drive folder labeled “HSA Reimbursements.”

At a 7% average annual return, her HSA balance after six years sits near $31,000, all invested in a total market index fund. Her folder holds $4,100 in documented receipts from dental cleanings, lab work, and a minor urgent care visit.

At age 60, Sarah pulls that $4,100 tax-free as reimbursement. She has not touched the invested balance. By 65, assuming continued contributions and 7% growth, her HSA holds approximately $198,000. After 65, HSA funds can be withdrawn for any reason at all, with ordinary income tax applied, making the account function exactly like a traditional IRA — but with better tax treatment on the medical spending side. Sarah uses $80,000 for Medicare premiums and qualified health costs tax-free. The rest supplements her retirement income.

That is not a theoretical outcome. That is arithmetic. The emotional reality is sharper: Sarah’s laminated sheet looked almost identical to Craig’s. She just read the footnotes.

Marcus and Diana: The Family Version

Marcus and Diana are a dual-income couple in their early 40s living outside Atlanta. Combined income: $210,000. Both employers offer HDHP options. In 2024, they coordinate to hit the $23,200 family HSA contribution limit.

They pay their family’s routine medical costs out of pocket, roughly $3,800 across the year for pediatric visits, a minor procedure, and prescriptions. Those receipts go into a shared Expensify account, tagged and dated. Their HSA balance is invested entirely in a three-fund portfolio inside their HSA custodian’s brokerage window.

At 7% annual growth, contributing $23,200 per year for 20 years produces approximately $956,000. That figure is consistent with projections modeled using standard IRS-compliant contribution schedules and historical S&P 500 average returns cited in Fidelity’s 2023 retirement planning research. Their documented receipts, growing every year, represent a tax-free withdrawal pool they can tap at any point without penalty, for any documented medical expense going back to account opening.

What Marcus and Diana have built is not a health plan. It is a tax-sheltered investment account with a medical deductible attached to the front end.

Did You Know: After age 65, HSA withdrawals for non-medical expenses are taxed as ordinary income, the same treatment as a traditional IRA. But withdrawals for qualified medical expenses remain completely tax-free at any age. That dual-use flexibility makes the HSA strictly superior to a 401(k) for anyone who expects meaningful healthcare costs in retirement — which is nearly everyone.

The Investing Mistake Almost Everyone Makes

Most HSA holders never invest their balance at all. The EBRI 2023 data confirms this: average balances hover under $4,000, and the majority of account holders leave funds sitting in a low-yield cash position earning 0.01% to 0.5%.

How much have you personally left on the table by keeping your HSA in cash while the market compounded for years without you?

This is the single most common and most costly HSA error. The account is not a medical checking account. It is an investment account that also happens to cover doctor bills.

Pro Tip: Start a dedicated folder — digital or physical — labeled HSA Receipts right now. The IRS requires documentation but sets no expiration date on reimbursements. Every receipt you save today is a potential tax-free withdrawal decades from now. Google Drive, Dropbox, or Expensify all work. Pick one and use it consistently.

My Position, Without Qualification

I spent 15 years on Wall Street. Here is what they never tell you: the most powerful tax structures are never the loudest ones in the room. The HSA sits quietly on that laminated open-enrollment sheet while your colleagues debate 401(k) match percentages. Wealthy clients I worked with were maximizing HSAs before the word “optimization” entered the personal finance vocabulary. They understood that three-layer tax protection compounds faster than two-layer tax protection. Every year. Without exception.

HDHPs are the wrong product for households that cannot absorb a high deductible without going into debt. That is a real constraint and I will not minimize it.

For everyone else? The HDHP-plus-HSA combination is quietly doing retirement account work that your 401(k) cannot replicate. If you are healthy, have an emergency fund, and can pay routine medical costs out of pocket, you are leaving serious money on the table by not running this strategy.

Your Next 3 Steps

Step 1: Log into your HSA portal today — Fidelity, Optum, HealthEquity, or wherever your account lives — navigate to the investment tab, and confirm your balance is invested in a fund, not sitting in a cash position. If it is in cash, initiate a transfer into a low-cost index fund before you close the browser.

Step 2: Open a free Google Drive folder right now, label it “HSA Receipts [Year],” and photograph or scan every medical receipt you can locate from this calendar year. Include the date, provider name, and dollar amount on each file name. Add every future receipt the same day you receive it.

Step 3: During your next open enrollment window, pull your EOB statements from the last 12 months, total your actual out-of-pocket medical spend, and compare it against the premium savings your HDHP option offers using the 2024 IRS numbers in this article. If the premium savings exceed your real annual spend, the HDHP is almost certainly the better financial choice.

The gap between Craig and Sarah was not income. It was not luck. It was one conversation about what the footnotes on that laminated sheet actually meant. You are now having that conversation.