Axle Weight Limit Calculator
Check truck axle weights against federal and state limits. Verify steer, drive, and tandem axle compliance with FMCSA 80,000 lb GVW and per-axle regulations.
Fleet Maintenance Cost Calculator
Calculate fleet maintenance cost per mile including preventive maintenance, corrective repairs, tires, parts, and labor. Benchmark your maintenance CPM against industry averages.
$/yr
$/yr
$/yr
$/yr
$/yr
mi
Maintenance CPM⧉
$0.18
Normal
Annual Total⧉
$21,000.00
$1,750.00/mo budget
Cost per Truck⧉
$21,000.00
120,000 mi/truck
PM Ratio⧉
21.4%
Below 40% — too reactive
Repair Ratio⧉
29.5%
Acceptable level
Benchmark⧉
$0.15–$0.22/mi
Your CPM -$0.01 vs mid
Cost Breakdown by Category
| Category | Annual Cost | $/Mile | Per Truck | % Share | Distribution |
|---|---|---|---|---|---|
| Preventive Maintenance | $4,500.00 | $0.04 | $4,500.00 | 21.4% | |
| Corrective Repairs | $6,200.00 | $0.05 | $6,200.00 | 29.5% | |
| Tires | $4,800.00 | $0.04 | $4,800.00 | 22.9% | |
| Parts | $2,000.00 | $0.02 | $2,000.00 | 9.5% | |
| Labor | $3,500.00 | $0.03 | $3,500.00 | 16.7% | |
| Total | $21,000.00 | $0.18 | $21,000.00 | 100% |
PM Ratio Analysis
PM Spend: 21.4%Target: 40–60%
Increase PM spending by $3,900.00 to reach 40% target — this should reduce reactive repair costs.
Industry Benchmarks by Truck Age
| Age Range | CPM Low | CPM High | Typical PM Ratio | Your CPM |
|---|---|---|---|---|
| 0-2 yrs | $0.10 | $0.15 | 50-60% | — |
| 3-5 yrs | $0.15 | $0.22 | 40-50% | $0.18 |
| 5-7 yrs | $0.20 | $0.28 | 30-40% | — |
| 7-10 yrs | $0.25 | $0.35 | 25-35% | — |
| 10+ yrs | $0.30 | $0.45 | 20-30% | — |
Monthly Budget Estimate
| Month | Estimated Cost | Variance |
|---|---|---|
| Jan | $1,938.00 | +$188.00 |
| Feb | $2,012.00 | +$262.00 |
| Mar | $1,927.00 | +$177.00 |
| Apr | $1,735.00 | -$15.00 |
| May | $1,551.00 | -$199.00 |
| Jun | $1,489.00 | -$261.00 |
| Jul | $1,584.00 | -$166.00 |
| Aug | $1,781.00 | +$31.00 |
| Sep | $1,958.00 | +$208.00 |
| Oct | $2,010.00 | +$260.00 |
| Nov | $1,904.00 | +$154.00 |
| Dec | $1,704.00 | -$46.00 |
Planning notes, formulas, and examples
About the Fleet Maintenance Cost Calculator
Fleet maintenance is a significant operating cost — typically $0.15-$0.30 per mile for well-maintained equipment, or $15,000-$35,000 per truck per year. The cost breaks down into: preventive maintenance (oil changes, inspections, filters), corrective repairs (breakdowns, component failures), tires ($3,000-$6,000 per truck per year), parts inventory, and labor.
Tracking maintenance cost per mile (CPM) is the industry standard metric. It enables comparison across trucks, fleet segments, and industry benchmarks. Rising CPM on a specific truck signals the end of its economic life. Declining CPM across the fleet indicates successful PM programs.
This calculator computes maintenance CPM from your cost components and annual miles. Use it for fleet budgeting, truck lifecycle decisions, and identifying vehicles with above-average maintenance spending.
Use the result to compare operating scenarios, pressure-test assumptions, and rerun the model when volumes, rates, or service targets change.
When This Page Helps
Maintenance is the third-largest fleet operating cost after fuel and driver pay. Tracking CPM by truck reveals which units are becoming cost sinks, when to trade equipment, and whether your PM program is delivering results. It gives the baseline measurement.
How to Use the Inputs
- Enter annual preventive maintenance costs.
- Enter annual corrective repair costs.
- Enter annual tire costs.
- Enter parts and labor costs (if tracked separately).
- Enter annual miles operated.
- View total maintenance cost per mile.
Formula used
Maintenance CPM = (PM Cost + Repair Cost + Tire Cost + Parts + Labor) / Annual Miles
Annual Maintenance = All Categories Summed
PM % = PM Cost / Total Maintenance Cost × 100
Target: PM should be 40-60% of total maintenance (proactive vs. reactive)Example Calculation
Result: Maintenance CPM = $0.175/mile
Total maintenance: $4,500 + $6,200 + $4,800 + $2,000 + $3,500 = $21,000/year. CPM: $21,000 / 120,000 miles = $0.175/mile. PM ratio: $4,500 / $21,000 = 21.4% (below the 40-60% target — indicates too much reactive maintenance).
Tips & Best Practices
- Industry average maintenance CPM: $0.15-$0.25/mile for trucks under 5 years old.
- Trucks over 7 years old often exceed $0.30/mile in maintenance — evaluate replacement.
- PM should be 40-60% of total maintenance — higher PM ratios mean fewer breakdowns.
- Tire programs (retreads, proper inflation, alignment) can save 15-25% on tire costs.
- Track CPM by truck to identify cost outliers and replacement candidates.
- Benchmark against ATA/ATRI cost reports for industry comparison.
Lifecycle Maintenance Cost Curve
Maintenance costs follow a predictable curve: low in years 1-3 (under warranty, minimal wear), steadily increasing in years 4-6 (warranty expires, components age), and accelerating in years 7+ (major systems need replacement). Understanding this curve helps time fleet replacement cycles for minimum total cost.
Maintenance Cost Components
The typical breakdown: engine/drivetrain 25%, tires 22%, brakes 12%, electrical 10%, body/frame 8%, HVAC/cooling 8%, suspension 7%, preventive services 8%. Knowing your distribution helps target cost reduction efforts at the largest categories.
Technology in Fleet Maintenance
Fleet maintenance software (TMT Fleet, Fleetio, RTA Fleet) tracks costs by truck, component, and vendor. Predictive maintenance using telematics data (oil analysis, engine fault codes, tire pressure monitoring) catches failures before they happen. These tools typically deliver ROI within 12-18 months for fleets over 20 trucks.
Sources & Methodology
Last updated:
Frequently Asked Questions
For trucks under 3 years old: $0.10-$0.15/mile. For 3-5 years: $0.15-$0.22/mile. For 5-7 years: $0.20-$0.28/mile. Over 7 years: $0.25-$0.40+/mile. These benchmarks assume 100,000-130,000 annual miles. Specialized equipment (reefers, tankers) runs higher.
PM ratio = Preventive Maintenance Cost / Total Maintenance Cost. A ratio of 40-60% indicates a proactive maintenance approach. Below 30% means you're mostly reacting to breakdowns (expensive and disruptive). Above 70% may indicate over-maintenance (replacing parts too early).
Tire cost runs $0.03-$0.06/mile, or $3,000-$6,000 per truck per year. Using quality retreads on drive and trailer positions, maintaining proper inflation, and regular alignments can reduce tire CPM by 20-30%. Steer tires should always be new.
Consider replacement when maintenance CPM exceeds 2× the fleet average, when a major repair exceeds 50% of the truck's current value, or when total CPM (maintenance + fuel) on an older truck exceeds the total CPM (maintenance + fuel + payment) on a new truck. Review your results periodically to ensure they still reflect current conditions.
A well-executed PM program catches problems early (e.g., replacing a $200 belt before it fails and damages a $2,000 radiator). PM reduces roadside breakdowns (average tow + repair = $2,000-$5,000), extends component life, and improves fleet uptime.
In-house shops make sense for fleets of 50+ trucks — fixed costs are spread across more units. Smaller fleets often save money outsourcing to dealer or independent shops. Hybrid approaches (in-house PM, outsource major repairs) work well for 20-50 truck fleets.
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