Pay-Per-Use vs. Prepaid: Which Model Actually Saves Your Healthcare Facility Money?

The Procurement Question That Keeps Me Up at Night

Procurement manager at a 200-person healthcare network. I've managed our medical equipment budget ($400,000 annually) for 6 years, negotiated with 20+ vendors, and documented every single order in our cost tracking system.

Everything I'd read said volume discounts in the prepaid model were the only way to save. In practice, for a facility like ours with variable patient volume, pay-per-use often wins. The conventional wisdom is that buying in bulk reduces unit cost. My experience with 120+ equipment orders suggests otherwise.

It took me 3 years and about 80 equipment purchases to understand that the pricing model—not just the device price—is the real cost driver. After 6 years of tracking every invoice, I've come to believe the best pricing model is highly context-dependent.

So here's the question we're going to unpack today: Pay-Per-Use vs. Prepaid (or outright purchase)—which model actually saves your facility money?

I'm going to compare them across three dimensions: total cost of ownership (TCO), cash flow efficiency, and upgrade flexibility. Let's get into it.

The Comparison Framework

Before we dive into the dimensions, let me be clear about what we're comparing:

• Pay-Per-Use (PPU): You pay a per-procedure or per-scan fee. No upfront capital. Includes service and maintenance.
• Prepaid/Outright Purchase: You buy the device upfront. You own it. Service and maintenance are separate costs.

The choice isn't about which is universally better—it's about which one fits your facility's specific usage patterns and financial situation. Here's the framework I use for every technology procurement decision.

Dimension 1: Total Cost of Ownership (TCO)

This is the big one. And the one where most people get it wrong.

Prepaid (Outright Purchase) looks cheaper on paper. You pay $50,000 for an ultrasound machine and you're done. But you're not done. For our facility, the real costs looked like this:

• Maintenance contract: $6,000/year
• Software updates: $3,000/year
• Parts replacement (probe, etc.): $4,000 every 2 years
• Training for new staff: $1,500 per session

Over 5 years, that's an additional $52,500 on top of the purchase price. Total: $102,500. That's a $20,500 annual cost—whether you use the machine once or 500 times.

Pay-Per-Use, in contrast, bundles all that into a per-scan fee. For a midsize ultrasound system, that was $120-$180 per scan for us. For a clinic doing 300 scans per year (a reasonable volume for a single machine), that's $36,000-$54,000 annually. Over 5 years: $180,000-$270,000.

Wait—that's more. So prepaid is better, right? Not so fast.

The hidden variable: utilization.

If you do 300 scans/year on that prepaid machine, your TCO per scan is $20,500 / 300 = $68 per scan. If you only do 150 scans? That jumps to $136 per scan. Suddenly, pay-per-use ($120-$180/scan) might be cheaper. The same equipment, same usage—completely different conclusion.

In Q2 2024, when we compared quotes for a new ultrasound system, Vendor A (prepaid) quoted $62,000. Vendor B (pay-per-use) quoted $155/scan. I almost went with A until I calculated our actual scan volume: roughly 220 scans per machine per year. At that rate, prepaid TCO was $93/scan, pay-per-use was $155/scan. Prepaid won. But for a smaller clinic doing 120 scans? Pay-per-use would be the obvious choice.

Dimension 2: Cash Flow Efficiency

This is where pay-per-use shines in ways most people don't expect.

Prepaid means a massive upfront capital expenditure. That $62,000 for the ultrasound machine? It's not just the cost—it's the opportunity cost. That's $62,000 that isn't available for other investments. For a 200-person network, that's a significant chunk of our annual equipment budget.

Pay-per-use, on the other hand, turns a capital expense into an operational one. No upfront hit. Cash flow stays predictable. Your monthly payment scales with your usage.

I don't have hard data on how many facilities undervalue liquidity, but based on our experience with 6 annual budget cycles, my sense is that most procurement managers underweight the value of cash on hand. We once delayed a necessary CT scanner upgrade because we'd tied up too much capital in a bulk purchase of patient monitors. That delay cost us more in lost imaging referrals than we saved on the monitor price.

The risk was tying up capital in a device that might be under-utilized. The upside of pay-per-use was preserving cash for other priorities. I kept asking myself: is saving $15,000 on the purchase price worth potentially missing out on a strategic investment six months from now? For our network, the answer was no.

Dimension 3: Upgrade & Technological Flexibility

Prepaid locks you into a specific technology generation. That ultrasound machine you bought today? In 3 years, the manufacturer will release a new version with better imaging algorithms and AI-assisted diagnostics. Your machine is now behind. The cost to upgrade? Usually a full replacement.

Pay-per-use agreements often include upgrades as part of the contract. The vendor has an incentive to keep you on current technology (it reduces their service costs), so you get software updates and even hardware replacements as part of the package.

After 5 years of managing procurement, I've come to believe that technological obsolescence is one of the most under-estimated costs in medical equipment purchasing. It's not just the depreciation; it's the gap between what you own and what your competitors use. For a capnography monitor (in case you're wondering what capnography is—it's the monitoring of CO₂ concentration in respiratory gases), the difference between a 2019 model and a 2024 model isn't just features; it's the ability to provide accurate data that feeds into newer clinical decision support systems.

So Which Model Should You Choose?

Here's my decision framework, built after 6 years of doing this and getting burned on hidden fees twice:

Choose Pay-Per-Use When:

• Your patient volume (and therefore equipment usage) is variable or uncertain.
• You have limited upfront capital but strong operational cash flow.
• The technology is evolving rapidly (e.g., imaging, diagnostic devices).
• You want a single predictable monthly cost with no surprises (note: always read the fine print on what's included in the per-use fee).

Choose Prepaid/Outright Purchase When:

• Your equipment usage is high and predictable (above 300 procedures/year per device usually tips the scales).
• You have available capital and the equipment has a long life span.
• You have in-house service capabilities or a strong relationship with a third-party maintenance provider.
• You want to own the asset for tax or strategic reasons.

What about tonometers (used for measuring intraocular pressure)? In our network, the tonometer (note to self: verify if our contract covers calibration fees) was a clear prepaid win—low technology evolution, high and steady usage, and long lifespan. For ultrasound and CT scanners? Pay-per-use is increasingly attractive.

Final Thought: The Transparency Factor

I've learned to ask "what's NOT included?" before "what's the price?"

The vendor who lists all fees upfront—even if the total looks higher—usually costs less in the end. The vendor who quotes a low base price and adds fees later (ugh, I've been burned by that more than once) is almost always more expensive on total cost of ownership.

For the pay-per-use vendors, I ask: "What's the per-procedure fee, and is there a minimum annual volume, escalation clause, or termination fee?" For the prepaid vendors: "What's the 5-year total cost including service, parts, and software?"

Pricing is for general reference only (based on quotes we received in Q1 2025; verify current rates). The right model for your facility depends on your specific usage, financial situation, and strategic priorities. But the framework works. Use it. And always, always calculate TCO before you sign.