The medium-duty truck market has not fully normalized from the supply disruptions of the early 2020s. Lead times on new Class 5–7 chassis from Freightliner, International, Ford, and RAM have shortened from the extreme delays of 2021–2022, but orders for configured units with specific upfit requirements still routinely run four to eight months out from order to delivery. Meanwhile, used inventory at auction and through dealer networks moves quickly when it's priced right, and the depreciation math on a three-to-five-year-old unit is often compelling.
Neither new nor used is categorically better. The right answer depends on your application, your urgency, your maintenance capability, and your financing situation.
What You're Actually Buying With a New Truck
A new chassis comes with the manufacturer's warranty — Freightliner's M2 carries a 2-year/unlimited-mile basic vehicle warranty and a separate 5-year/100,000-mile coverage on EPA 2010-compliant diesel emissions components. Engine coverage is warranted directly by the engine manufacturer (Cummins, Detroit). International's MV carries 12 months unlimited miles base coverage, with the Cummins B6.7 engine warranted separately at 36 months/unlimited miles. For post-2010 trucks, EPA regulations mandate aftertreatment system warranty coverage of at least 5 years or 100,000 miles on major emissions components, as required by EPA emissions standards for heavy-duty highway engines. That warranty has real dollar value on emissions systems, where a single SCR catalyst replacement can run $3,000–$5,000 on a 6.7L platform.
New trucks also arrive with current-generation chassis electronics. The difference between a 2020 and a 2024 platform in terms of driver-assist systems, telematics integration, and diagnostic interface isn't radical, but it does matter for long-term support. Software updates, diagnostic coverage, and dealer familiarity with the platform all tend to be better on current-generation units.
The downside of new, beyond lead time, is depreciation. A medium-duty truck loses roughly 20–25% of its purchase value in the first two years. If your application requires custom upfitting — a service body, a crane, a TMA mounting system — the upfit work adds cost that doesn't depreciate as gracefully as the chassis itself. Some upfit configurations also add complexity to resale, narrowing the market for buyers who might not need that specific configuration.
The Used Case: Depreciation Curve Works in Your Favor
A three-year-old Class 6 truck that was well-specified, well-maintained, and lightly worked sits in an attractive band on the depreciation curve. The original buyer absorbed the steep first two years. The truck is young enough to have substantial remaining service life. Warranty coverage is likely expired, but the emissions system — if maintained properly — is through the highest-risk years of early post-break-in operation.
The argument for used is strongest when:
- Your urgency is real. A truck you need in 30 days cannot come from a new order. Used inventory can be inspected, purchased, and delivered in days to weeks.
- Your application is standard. A straight service body or a commodity upfit configuration is easy to find in the used market. Specialty configurations — specific crane ratings, specific TMA mounting provisions — require more searching.
- Your maintenance infrastructure is solid. A used truck past warranty coverage is only a good deal if you have the maintenance capability (in-house or contracted) to stay ahead of it. A fleet that defers PM work should not be buying used trucks.
- The depreciation math pencils. The avoided depreciation on a used unit partially offsets the lost warranty protection. Run the comparison explicitly: estimate the probability-weighted cost of warranty events on a new unit versus the actual maintenance history cost on a used candidate.
Reading the Depreciation Curve
Medium-duty trucks in normal commercial service follow a reasonably predictable depreciation curve in the absence of major damage or mechanical neglect. The slope is steepest in years one and two, flattens through years three to six, and then slopes again as the truck approaches the age at which emission system components, cab components, and drivetrain items start generating unplanned cost.
The practical sweet spot for most used buyers is in the 3–5 year range on trucks with under 80,000 miles. Beyond 100,000 miles on a Class 6 platform, you are starting to enter the territory where the timing of larger unplanned expenses is harder to predict, and the margin for error in a pre-purchase inspection matters more.
High-mileage trucks are not automatically bad deals. A fleet truck that ran highway miles at steady throttle in a favorable duty cycle with documented PM compliance is a different asset than a truck with the same odometer reading in stop-and-go service with incomplete maintenance records. Mileage is one input, not the whole analysis.
What Lead Time Actually Costs
Fleet managers sometimes underestimate the cost of a lead-time gap. If a truck is needed for an active contract and a new order won't deliver for six months, the interim cost may include:
- Renting a comparable unit at $150–$300/day
- Subcontracting work at reduced margin
- Deferring contract commitments and damaging customer relationships
- Running an existing truck past its planned retirement date, with increased maintenance risk
When those costs are made explicit, the premium for a used truck available now versus a new truck available in six months often narrows considerably. The comparison is not new-truck price versus used-truck price — it is new-truck price plus lead-time gap cost versus used-truck price plus expected maintenance costs over the same period.
Financing Considerations
New trucks generally carry more favorable financing terms. Manufacturer captive finance arms (Daimler Truck Financial Services for Freightliner, and Navistar Financial Corporation — now part of TRATON Financial Services — for International Trucks) offer rate incentives on new chassis that are not available on used. The interest rate differential between a new-unit retail rate and a used-unit commercial rate can be 1–3 percentage points, which on a 5-year note at $80,000 principal represents meaningful total cost.
Used trucks financed through bank or credit union commercial paper often require larger down payments and carry shorter maximum term lengths, which raises the monthly payment even at similar total cost. If cash flow is a constraint, this matters.
On the other side, used trucks typically have lower acquisition cost and may qualify for Section 179 expensing in the same way new trucks do. Under the One Big Beautiful Bill Act (P.L. 119-21, signed July 4, 2025), 100% bonus depreciation under Section 168(k) was permanently restored for qualified property acquired and placed in service after January 19, 2025 — meaning most fleet equipment purchases, new and used, can be fully expensed in the year placed in service. Consult your accountant, but the tax treatment of a capital equipment purchase is not automatically favorable for new over used.
Spec Matching: New Lets You Configure, Used Requires Compromise
One genuinely important advantage of ordering new is the ability to specify the truck for your exact application. GVWR rating, wheelbase, frame gauge, axle ratios, cab configuration, PTO provisions, electrical system prep packages, and dozens of other options are all configurable at the factory. A custom spec for a crane truck or a service body application can optimize payload, turning radius, upfit wiring, and body length in ways that a used truck sourced from whatever's available in the market may not.
For buyers with a non-standard application, the spec-matching issue alone can outweigh the lead-time and depreciation arguments. A truck that doesn't quite fit the application costs more in long-term productivity than the difference in acquisition price.
For buyers with standard applications — a common service body configuration, a standard TMA upfit, a dump body spec that matches available chassis — the used market typically has suitable candidates with acceptable compromise.
Talk to us
If you're trying to work through the new-versus-used decision for a specific application, we see both sides of this regularly through our fleet services and our TMA truck inventory. Call (940) 600-5131 or reach us at /contact to talk through what makes sense for your situation.