The Accounting Stops. The Costs Don’t.
Your paid-off car. Your legacy EHR. Same cognitive error. Different invoice.
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Healthcare organizations are running $400M EHRs the same way most people drive a paid-off gas car. Eyes forward. No math.
The monthly payment is gone, so the analysis is done. The system is owned, so it registers as free. Nobody is counting the per-physician productivity drag, the alert fatigue overhead, the workaround hours that don’t show up on any invoice. The ongoing cost is invisible because there’s no recurring bill forcing the comparison.
I want to talk about this cognitive error. And I’m going to use my driveway to do it.
The Math Nobody Runs
My wife and I own two paid-off Teslas. No monthly payment. Charging overnight at my utility’s off-peak rate of $0.10/kWh.
For the Model 3: The Tesla’s 75 kWh battery gets 267 miles per charge. That’s 0.281 kWh per mile. At $0.10, I’m paying $0.028 per milein electricity.
A gas car at 27 mpg with gas at $4/gallon costs $0.148 per mile.
That’s a $0.12 gap per mile. With no financing payment in the picture, there’s no break-even threshold to hit. Every single mile is just $0.12 cheaper than the alternative. At 2,000 miles a month across both vehicles, that’s $240 in monthly savings versus equivalent gas cars. Compounding. Indefinitely.
The math isn’t complicated. Nobody runs it because the gas car is paid off, and “paid off” registers as closed.
The Error Has a Name
Sunk cost is the familiar version of this, but that’s not quite what’s happening here. Sunk cost is about continuing a bad investment because of what you’ve already spent. This is something slightly different — call it status-as-analysis. “Paid off” is a payment status. People treat it as a cost analysis. Those are completely different instruments and most of us conflate them by default.
The monthly invoice disappears, so the accounting stops. But the per-mile cost of gas never stopped. Maintenance never stopped. The spread between what you’re spending and what you could be spending keeps widening. You just stopped seeing it because there’s no document forcing the comparison.
I wrote about a version of this in The $3 Trillion Assay: an addressable market and an accessible market are different instruments measuring different things. The paid-off asset version is simpler, but the cognitive error is identical. You look at the thing you own, see no payment due, and conclude the analysis is complete. The question of what the next mile actually costs never gets asked.
The Supply-Side Trap
There’s a related pattern in The River Doesn’t Need a Faster Channel: the implicit assumption that the existing arrangement is the right arrangement. We optimize around it instead of questioning it.
Most people with a paid-off gas car don’t ask whether they should have a gas car. They download GasBuddy. They time their fills. They find the cheapest pump in a three-mile radius. All of that is supply-side optimization — making the existing asset work a little cheaper, a little smoother — while the more fundamental question goes unasked.
Healthcare does this constantly. Legacy infrastructure persists not because it performs well, but because switching friction gets mistaken for switching cost. As I argued in The Immortal Ten, systems survive because the friction of replacement is high enough that the question stops being asked. The EHR is paid off. Or mostly paid off. Or we’ve already invested so much that reversing feels impossible. So nobody runs the per-physician cost. Nobody tallies the hours. The system is owned, and ownership reads as settled.
It isn’t.
The Overnight Principle
Here’s what I’d add from living on the other side of that calculation.
Both cars charge overnight while I sleep. Off-peak utility rates apply automatically. In the morning, they’re full. I have not been to a gas station in months. There is no transaction, no decision, no five minutes standing outside in whatever weather is happening. Fueling is now entirely passive.
I wrote about this same architecture in The Signal Is In Your Bed — passive and continuous infrastructure beats active and intentional at scale. You don’t have to remember to engage with it. It runs underneath ordinary life and surfaces the output when you need it. Eight Sleep does this for sleep health monitoring. Overnight EV charging does this for fuel cost. The principle is the same: the best infrastructure is the kind that stops requiring decisions.
The healthcare version of this is still being built. But the organizations that get there — that embed the right infrastructure so deeply into workflow that clinicians stop having to actively engage with it — will have a structural cost advantage that compounds the same way my charging bill does. Quietly. Every night. While everyone else is still looking for the cheapest pump.
The accounting stops when the payment does. The costs don’t. Run the math on everything you consider already paid for — your car, your systems, your infrastructure. The number that comes back might surprise you.
— Adam
What’s sitting in your organization right now that’s “paid off” but still costing you? Drop it in the comments.