Per-Mile Cost Calculator — Know Your True Cost Before You Quote a Rate

A carrier quotes $2.80 per mile on a 600-mile lane. Is that a good rate? A fair rate? A rate that'll put them out of business in six months?

The answer depends entirely on what their actual cost per mile is. If their true operating cost is $2.50/mile, they're making 30 cents a mile — thin but sustainable. If their cost is $2.90/mile, they're losing money on every load and either don't know it or are planning to cut corners to make up the difference.

For brokers, this matters because carriers who operate below cost are unreliable. They defer maintenance. They push drivers past HOS limits. They take on loads they can't handle and double-broker them to cover capacity they don't have. A carrier quoting below-cost rates is a carrier that will eventually fail — the question is whether they fail while hauling your freight.

For carriers, knowing your true cost per mile is the difference between building a sustainable business and slowly going broke while staying busy.

Why Most Carriers Don't Know Their Real Cost Per Mile

The American Trucking Associations estimates that the average marginal cost of trucking operations is between $1.50 and $2.50 per mile, depending on fleet size, equipment type, and operating region. But "average" covers an enormous range, and most individual carriers — especially owner-operators and small fleets — don't calculate their actual cost accurately.

The problem is that per-mile costs include both obvious expenses and hidden ones:

The Obvious Costs

These are the expenses every carrier tracks:

Fuel — The largest variable cost. At $3.50/gallon diesel and 6.5 MPG average, fuel costs approximately $0.54/mile. But fuel efficiency varies dramatically by equipment type, terrain, speed, and load weight. A reefer running its refrigeration unit burns 20-30% more fuel than a dry van.

Driver pay — For company drivers, this is typically $0.50-$0.70/mile depending on experience and region. For owner-operators, driver "pay" is whatever is left after expenses — which makes accurate cost calculation even more critical.

Insurance — Primary liability, cargo, physical damage, and bobtail coverage. For a single-truck owner-operator, insurance costs $12,000-$20,000/year. For a 100-truck fleet with good safety records, per-truck costs may be lower but total premiums are substantial. Divided by annual miles, insurance typically runs $0.05-$0.15/mile.

The Hidden Costs

These are the expenses many carriers underestimate or forget:

Truck payment or depreciation — Whether you're making payments on a financed truck or depreciating an owned truck, the cost of the asset is real. A $150,000 truck financed over 5 years at 7% costs approximately $0.12-$0.18/mile depending on annual mileage.

Maintenance and repairs — Tires, brakes, oil changes, PM services, and unplanned repairs. The average maintenance cost is $0.15-$0.20/mile, but this increases significantly as trucks age. A truck with 500,000+ miles costs more to maintain than one with 100,000 miles.

Permits and licensing — IFTA, IRP, UCR, HVUT, state permits, oversize/overweight permits for specialized carriers. These fixed annual costs can total $3,000-$8,000/year, or $0.02-$0.06/mile.

Tolls — Route-dependent but significant on certain lanes. The Northeast corridor (I-95) can add $100+ in tolls per trip. Averaged across all miles, tolls typically add $0.02-$0.05/mile.

Overhead — Office costs, accounting, software subscriptions, communications, ELD subscriptions, load board fees, factoring fees. For owner-operators, this might be $500-$1,000/month. For small fleets, significantly more.

Deadhead miles — Miles driven empty between loads. The industry average empty mile percentage is approximately 15-20%. If you drive 130,000 miles per year but only 110,000 are loaded, your cost per loaded mile is higher than your cost per total mile. This distinction matters enormously for rate calculations.

Detention and layover — Time spent waiting at shippers and receivers. The average driver spends 2-3 hours per stop beyond the scheduled appointment. At an opportunity cost of $25-$50/hour (miles not driven), detention adds a real but hard-to-quantify cost per load.

How to Calculate Your True Cost Per Mile

CarrierBrief's Per-Mile Cost Calculator breaks the calculation into clear categories:

Fixed Costs (Monthly)

These costs don't change with miles driven:

Variable Costs (Per Mile)

These costs scale with miles driven:

The Calculation

Cost per mile = (Monthly fixed costs / Monthly miles) + Variable cost per mile

Example for an owner-operator running 10,000 miles/month:

• Fixed: $4,500/month / 10,000 miles = $0.45/mile
• Variable: $1.35/mile
• Total: $1.80/mile

This means any load paying less than $1.80/mile loses money. A load paying $2.50/mile generates $0.70/mile profit — $7,000/month on 10,000 miles.

The Loaded Mile Adjustment

The calculation above uses total miles. But carriers don't get paid for deadhead miles. If 20% of your miles are empty:

• 10,000 total miles, 8,000 loaded miles
• Fixed: $4,500 / 8,000 loaded miles = $0.56/mile
• Variable: $1.35/mile (still applies to all miles, but revenue only comes from loaded miles)
• Adjusted variable: $1.35 × (10,000/8,000) = $1.69/mile
• True loaded-mile cost: $2.25/mile

That changes the math significantly. A $2.50/mile rate that looked like $0.70/mile profit is actually only $0.25/mile after adjusting for deadhead.

Why Brokers Should Care About Carrier Economics

As a broker, you're not responsible for a carrier's profitability. But understanding carrier economics helps you in three ways:

1. Spotting Unsustainable Rates

When a carrier quotes a rate that's significantly below the current market, it's worth asking why. Common reasons:

• They need cash flow — They'll take any load to keep money moving. This carrier is under financial stress, which correlates with deferred maintenance, HOS violations, and eventual failure.
• They're deadheading home — They need to reposition and want some revenue rather than none. This is legitimate, but the below-market rate shouldn't set your expectation for future loads on the same lane.
• They don't know their costs — They're guessing at rates and accidentally undercutting themselves. This carrier won't be around long.
• They're planning to double broker — They'll accept the load at your rate, then re-broker it at a lower rate and pocket the difference. The actual carrier hauling the freight is unknown to you.

The Double Broker Risk Check can help identify carriers who may be accepting loads they can't profitably haul themselves.

2. Negotiating Fair Rates

Understanding what a lane actually costs to operate helps you negotiate rates that are fair to both parties. A rate that's too low drives away good carriers and attracts desperate ones. A rate that's reasonable attracts carriers who can afford to maintain their equipment and comply with regulations.

3. Evaluating Carrier Viability

A carrier who consistently takes loads at rates that don't cover their operating costs is a carrier who will eventually cut corners, miss deliveries, or go out of business mid-contract. The Instant Vet tool assesses current safety data, but understanding the economics adds another layer of evaluation.

Industry Benchmarks

For context, here are approximate all-in operating costs by equipment type (2025-2026 data):

These ranges represent breakeven points. Revenue per mile must exceed these numbers for the carrier to profit.

Using the Calculator

CarrierBrief's Per-Mile Cost Calculator walks you through each cost category:

1. Enter your monthly fixed costs (truck payment, insurance, overhead)
2. Enter your per-mile variable costs (fuel, maintenance, tires)
3. Enter your monthly mileage and deadhead percentage
4. Get your true cost per mile — both total and loaded-mile adjusted

The calculator provides your breakeven rate — the minimum per-mile rate you need to cover costs. Any load paying above this number is profitable. Any load paying below it is a loss.

Related Calculators

CarrierBrief offers several calculators for freight professionals:

• [Fuel Surcharge Calculator](/tools/fuel-surcharge-calculator) — Calculate fuel surcharges based on current EIA diesel prices. Updated weekly from the U.S. Energy Information Administration.
• [Detention Pay Calculator](/tools/detention-pay-calculator) — Calculate detention charges based on wait time and hourly rates.
• [HOS Rules Calculator](/tools/hos-rules-calculator) — Verify hours-of-service compliance with FMCSA's current rules.
• [OOS Rate Calculator](/tools/oos-rate-calculator) — Calculate out-of-service rates and compare against national averages.
• [Minimum Coverage Calculator](/tools/minimum-coverage-calculator) — Determine required insurance minimums based on cargo type and authority.

Try the Per-Mile Cost Calculator

Visit carrierbrief.com/tools/per-mile-cost-calculator and calculate your true operating cost. Whether you're a carrier setting rates or a broker evaluating rate reasonableness, knowing the real numbers is the foundation of every good freight decision.

Stop guessing. Know your cost.