Parts & maintenance
How Much Does Semi Truck Maintenance Cost? (2026)
What it costs to maintain a semi truck in 2026: ATRI's 21.5 cents per mile repair and maintenance average, published price examples for PM service, tires, brakes, DPF cleaning and engine overhauls, a maintenance schedule, and how to budget per mile.
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Maintenance is the cost new owner-operators most often underestimate. The truck payment is fixed; repairs aren't. This guide uses ATRI's national averages for the per-mile budget and published price examples from real shops for individual jobs. Shop prices are labeled as examples: your quote depends on your engine, region and the shop's labor rate.
Need a place to buy parts or get the work done? See the parts & maintenance hub for official dealer, parts-chain and truck-stop service locators.
What the industry spends per mile (ATRI)
The American Transportation Research Institute's Operational Costs of Trucking: 2026 Update (2025 data from motor carriers) reports:
| Line item | 2024 | 2025 | Notes |
|---|---|---|---|
| Repair & maintenance | $0.198/mi | $0.215/mi | +8.6%. Parts, labor (in-house and purchased) and roadside service; excludes tires and towing |
| Tires | $0.047/mi | $0.050/mi | +6.4%. Purchase, maintenance, retreading and replacement |
| Repair & maintenance per hour | $9.04/hr | $9.82/hr | Same costs measured per operating hour |
| Total operating cost (all items) | $2.260/mi | $2.336/mi | R&M is about 9% of the total |
Other findings that matter for a small operation:
- Small fleets pay more. In the truckload sector, fleets with fewer than 5 trucks had the highest R&M costs, partly because they spend less on newer equipment. ATRI: "fleets that spend less on asset procurement typically must spend more to maintain them."
- Breakdowns are frequent. The industry averaged 36,891 miles between breakdowns or unscheduled repairs in 2025 (32,894 for truckload fleets).
- Region matters. R&M ran from $0.194/mi in the South Central region to $0.221/mi in the Northeast.
- Fleets under 5 trucks still did 42% of maintenance in-house. Doing basic work yourself is a real lever on cost.
- Parts are rising. ATRI cites Decisiv/TMC data showing parts costs up 3.7% in 2025, with the biggest jumps in rear axles, wheel-end parts and filter kits.
Published price examples by job
These are prices that shops and sellers publish on their own websites, checked in October 2026. They are examples, not quotes or averages.
| Job | Published example | Source and what's included |
|---|---|---|
| PM service (oil, filters, inspection) | $509–$589 complete | Royal Truck Repair (PA): Detroit DD13/DD15/DD16 package $509, package 2 $529, larger engines up to $589; extra repairs at $165/hr |
| PM service special (dealer) | $349.99–$899 by vehicle class | California Truck Centers, Central CA service menu effective Mar. 2, 2026 |
| Drum brakes | $500 per axle (labor only) | California Truck Centers; parts extra. Disc pads $200 per axle (labor) |
| DPF cleaning | $250 clean · $350 clean + bake | PDX DPF (OR), semi-truck open-ended filters; removal and reinstall extra |
| DPF remove and replace (labor) | $274, or $404 with validation | California Truck Centers (labor only) |
| Drive tires (295/75R22.5) | $260 each example | Liberty Truck Tires listing; 8 drive tires ≈ $2,080 before mounting and fees |
| Steer tires (295/75R22.5) | $300–$575 each | Liberty Truck Tires listings (budget to premium) |
| Clutch replacement (labor) | $2,205 | California Truck Centers, DT12/Eaton, labor only |
| In-frame engine overhaul | $15,000–$25,000 | TruckClub 2026 guide (Cummins X15 about $18,000–$25,000; Detroit DD15 about $16,000–$23,000) |
| Out-of-frame overhaul | $25,000–$40,000+ | TruckClub 2026 guide |
Downtime is a cost too. TruckClub's guide estimates an in-frame rebuild takes 7 to 14 days and an out-of-frame 14 to 28 days. Plan where the truck payment and insurance come from while you're not earning.
Maintenance schedule (typical)
Your engine and truck maker's maintenance manual sets the real intervals. Use this table as a starting checklist, and swap in your OEM's numbers.
| When | What | Cost type | Rule or source |
|---|---|---|---|
| Every day | Pre-trip inspection; post-trip report (DVIR) of defects | Driver time | Required: 49 CFR 396.13 and 396.11 |
| Every fuel stop | Walk-around: tires, lights, leaks, air lines | Driver time | Good practice |
| About every 20,000–25,000 mi (highway) | PM-A: oil and filters, chassis lube, brake and tire check | ~$350–$900 per published examples | Interval cited by a published shop page; follow your OEM manual |
| Every 2nd–3rd PM | PM-B/C: fuel filters, air dryer, coolant test, deeper inspection | Higher than PM-A | OEM manual |
| As linings wear | Brake reline / drums | ~$500/axle labor + parts (example) | Inspect at every PM |
| By tread depth | Tire replacement | ~$235–$575 per tire (examples) | Minimum 4/32" steer, 2/32" other tires: 49 CFR 393.75 |
| OEM ash-cleaning interval | DPF clean or replace | ~$250–$350 cleaning (examples) | OEM aftertreatment manual |
| At least every 12 months | Periodic (annual) inspection | Shop fee | Required: 49 CFR 396.17 |
| Condition-based | Engine overhaul | $15,000–$40,000+ (published ranges) | Oil analysis, blow-by, oil use |
Keep records of every inspection, repair and maintenance job for each truck. FMCSA requires them (49 CFR 396.3), and they help at resale and during a new entrant safety audit.
How to budget for maintenance per mile
The simplest system: set aside a fixed amount for every mile you run and move it to a separate repair account each week.
| Annual miles | R&M at $0.215/mi | Tires at $0.050/mi | Total per year | Per month |
|---|---|---|---|---|
| 80,000 | $17,200 | $4,000 | $21,200 | ≈ $1,767 |
| 100,000 | $21,500 | $5,000 | $26,500 | ≈ $2,208 |
| 120,000 | $25,800 | $6,000 | $31,800 | ≈ $2,650 |
Illustration using ATRI's 2025 industry averages. Small fleets, older trucks and severe-duty work typically run higher.
Ways to lower the number:
- Don't skip PMs. A PM costs a few hundred dollars; a roadside tow and an unplanned repair can cost thousands plus lost loads.
- Learn the basics. Fleets under 5 trucks still did 42% of their maintenance in-house, per ATRI.
- Shop parts. Compare dealer, all-makes chains and online sellers for wear items. See the parts hub.
- Watch idle time. Idle hours wear the engine without adding miles, so hour-based PM intervals matter for trucks that idle a lot.
- Consider coverage for big failures. Extended warranties and roadside memberships trade a fixed monthly cost for less risk. Read what's excluded before you buy.
Related guides
- Parts & maintenance hub: where to find parts, shops and roadside help.
- Cost to start a trucking company: the full startup budget.
- New authority truck insurance cost: the other big monthly bill.
FAQ
How much does semi truck maintenance cost per mile?
How much does a semi truck PM service cost?
How much should an owner-operator save for repairs each month?
How much does it cost to rebuild a semi truck engine?
How often does a semi truck need maintenance?
Sources
Checked October 27, 2026. Government sources first; private prices are labeled as examples.
- Analysis of the Operational Costs of Trucking, 2026 Update (repair & maintenance, tires, miles between breakdowns) (American Transportation Research Institute (ATRI))
- 49 CFR 396.17, Periodic inspection (eCFR)
- 49 CFR 396.11, Driver vehicle inspection report(s) (eCFR)
- 49 CFR 396.13, Driver inspection (eCFR)
- 49 CFR 396.3, Inspection, repair, and maintenance (records) (eCFR)
- 49 CFR 393.75, Tires (minimum tread depth) (eCFR)
- PM service & oil change price example ($509–$589 complete) (Royal Truck Repair, Breinigsville, PA)
- Central California service menu (PM special, brakes, DPF labor; effective Mar. 2, 2026) (California Truck Centers)
- DPF cleaning price examples ($250 clean, $350 clean + bake) (PDX DPF, Lake Oswego, OR)
- Semi truck tire price examples ($235–$575 per tire) (Liberty Truck Tires)
- Heavy duty engine rebuild costs in 2026 (in-frame and out-of-frame ranges) (TruckClub)
Keep going
Not legal, tax or insurance advice. General information only. Fees change; confirm with the agency before you pay.