There's No One 'Right' Answer for Buying Heavy Equipment
I've been managing procurement for a mid-size excavation company for about 6 years now. Over that time, I've audited roughly $180,000 in cumulative spending on equipment and parts—mostly Caterpillar stuff. And one thing I've figured out is that the question, 'Should I buy new or used Cat equipment?' is almost always the wrong question.
The real question is: What's the total cost per operating hour for your specific use case?
That number—cost per hour—is what actually determines if you're saving money or burning it. And it changes wildly depending on whether you're a full-time excavation crew, a weekend landowner, or a company that needs a specialized machine for a single project.
So, let's break it down by scenario. I'll walk you through how I calculate cost-per-hour for different situations, and then I'll show you how to figure out which scenario you're in. (I should add: these are my notes from tracking every invoice in our ERP system, so your mileage may vary if you're dealing with different conditions.)
Scenario A: The 40-Hour-a-Week Crew (The 'New' Math)
If your excavator or loader runs 40 hours a week, 50 weeks a year (minus a couple weeks for holidays and maintenance), you're in the high-utilization camp. For you, the price tag on a new Caterpillar 320 excavator ($250,000-$350,000 depending on options) is a big number. But the cost-per-hour math looks very different over 5 years.
Here's the rough calculation I use:
- Purchase Price: ~$300,000 (let's say)
- Residual Value (after 5 years/10,000 hours): ~$150,000 (Cat holds value better than most, circa 2023 this was the trend)
- Net Acquisition Cost: $150,000
- Fuel & Fluids: ~$25/hour x 10,000 hours = $250,000
- Maintenance & Repairs (factory schedule): ~$50,000 over 5 years (this is a guess, honestly—it depends on soil conditions, operator skill, etc.)
- Total Cost Over 5 Years: $450,000
- Cost Per Hour: $45/hour
Now, let's compare that to buying a used Cat 320 with 5,000 hours for, say, $150,000. You'd save $150,000 upfront. But (ugh) you're buying into a machine that's 5,000 hours closer to a major overhaul. The residual value after another 5,000 hours might be closer to $80,000. So:
- Net Acquisition Cost: $70,000
- Fuel & Fluids: Same: $250,000
- Maintenance (likely higher for older machine): ~$80,000 (more unexpected breakdowns—believe me, I've been there)
- Total Cost Over 5 Years (5,000 hours): $400,000
- Cost Per Hour: $80/hour
The surprise: The used machine actually costs nearly twice as much per hour over that period. That caught me off guard the first time I ran the numbers. (Should mention: this assumes the new machine doesn't have catastrophic failures under warranty. If it does, all bets are off.)
Scenario B: The 'Weekend Warrior' (Don't Buy New, But Think About Depreciation)
If you're running a machine maybe 200-300 hours a year—think of a small contractor doing site prep for residential builds—your cost-per-hour math flips completely.
For you, buying a new Cat 320 is overkill. You'll never use up the life of the machine. You'll end up selling it in 10 years with 3,000 hours on it. In that case, your depreciation is brutal:
- Buy for $300,000, sell for maybe $200,000 after a decade. That's $100,000 of depreciation for only 3,000 hours of use. Cost per hour just on depreciation: $33/hour.
- Plus maintenance (which is low), fuel, insurance—you're still looking at $50-$60/hour.
Now try this: Buy a good used machine with 5,000-7,000 hours for $120,000. Run it for 5 years (1,500 hours total), and sell it for $70,000.
- Depreciation: $50,000 / 1,500 hours = $33/hour again.
- But your acquisition cost is lower, so your insurance is lower, and you'll probably have fewer breakdowns than you'd think if you get a well-maintained Cat (their reputation isn't a lie, generally). Total cost might be $40-$50/hour.
So for lower hours, buying used makes sense. But here's the thing: what most people don't consider is that the cheapest option might be renting for these low-hour scenarios. A 5-year-old Cat 320 rents for about $15,000-$18,000 per month with 200 hours included. You're at $75-$90/hour if you use all those hours. But if you only need it for a few months a year, you're not paying insurance or storage, and you're not on the hook for major repairs. Honestly, I'm not sure why more small operators don't just rent for peak seasons.
Scenario C: The 'One Big Job' (Rent. Just Rent.)
If you need an excavator for a single 3-month project—say, digging foundations for a new warehouse—buying is almost never the right move. I made this mistake early on. We bought a machine for a contract, then had to park it for 6 months while we found the next job.
For you, renting a Caterpillar 320 for three months might cost $45,000 (3 months at $15,000). That's $75/hour if you run it 200 hours a month. Seems expensive, right?
But let's compare it to buying. After that job, if you buy the machine, you'll have it sitting in your yard. You're paying insurance, you're paying storage, you're hoping the next job comes. If it takes 6 months to find the next job, your holding costs eat your profits.
The trigger event for me was a project in 2023 where we bought a backhoe for a specific contract. The project got delayed 4 months due to permitting. We were paying for financing and insurance on a machine we weren't using. That mistake—which cost us $4,200 in idle costs—changed how I think about equipment acquisition for specific projects.
Bottom line: If you know your horizon, rent. If you don't know your horizon, rent anyway until you do. (That said, if you plan to keep the machine for 5+ years, buying new might still win—see Scenario A.)
How to Figure Out Which Scenario You're In
It's not complicated, but it requires honesty about your utilization rate. Here's the simple test I use:
- Project your annual operating hours. Are you over 2,000 hours/year? Under 500? That's the big divider.
- Project your ownership horizon. Will you keep the machine for 5+ years? Or are you likely to sell in 2-3 years?
- Calculate the cost of downtime. How much money do you lose per day if the machine is down? For a mining operation, it's thousands. A farm, maybe hundreds. That changes your risk calculation.
But here's the thing: I can only speak to the math for domestic operations with predictable ordering patterns. If you're a seasonal business with demand spikes—say, a landscaping company that runs hard in spring and sits idle in winter—the calculus might be different. You might want to buy used and sell during the off-season to avoid holding costs.
Oh, and one more thing: don't forget to check Caterpillar's official specs and support documentation (cat.com). They have calculators and dealer networks that can give you localized cost estimates. The numbers I used above are based on US market data circa 2023-2024, so verify with your local Cat dealer for current pricing.
It's a big decision. But if you focus on cost-per-hour rather than the sticker price, you'll make a better call.