The rate on a load tells you how much revenue the freight may produce. It does not tell you whether that revenue is enough for your specific trucking business.
Two owner-operators can haul the same load for the same rate and still have different financial results because their truck payments, insurance, fuel economy, maintenance costs and other expenses may be different.
That is why knowing your own approximate cost per mile can be more useful than relying on a generic industry number.
What Is Cost Per Mile in Trucking?
Cost per mile, often shortened to CPM, is an estimate of how much money your trucking operation spends for each mile the truck travels.
The concept is simple: take the expenses associated with operating the truck during a defined period and divide those expenses by the miles driven during the same period.
The important part is consistency. If you use one month of expenses, use the miles driven during that same month. If you calculate using a full year of expenses, use the mileage from that year.
The Basic Cost Per Mile Formula
At its simplest, the calculation looks like this:
For example, if your business spends $11,700 during a period in which the truck travels 10,000 miles:
That does not mean every individual mile literally costs exactly $1.17. Instead, it gives you a planning estimate that spreads the operating expenses across the miles driven.
Which Expenses Should You Include?
A useful calculation needs to reflect the real costs of operating your business. It helps to think of expenses in two broad groups: fixed costs and variable costs.
Fixed operating costs
Fixed costs are expenses that generally continue even when the truck is not moving. Depending on your operation, they may include items such as truck or trailer payments, insurance, permits, accounting services, subscriptions and business-related communication expenses.
Variable operating costs
Variable costs tend to change depending on how much the truck operates. Fuel is usually one of the largest examples. Maintenance, tires, repairs, tolls and other trip-related expenses can also fall into this category.
Your expense categories may be different. Use records from your own trucking operation rather than treating this list as a complete accounting checklist.
How to Calculate Cost Per Mile Step by Step
Choose a time period
Use a period for which you have reliable expense and mileage records. This might be a month, quarter or another consistent business period.
Add your operating expenses
Combine the expenses you want reflected in your cost-per-mile estimate. Avoid mixing expenses from a different time period.
Calculate total miles
Use the total miles the truck traveled during the same period, not only the miles for which a customer or broker paid you.
Divide expenses by miles
Divide your total operating expenses by your total miles. The result is your estimated operating cost per mile for that period.
Cost Per Mile Example
Consider a simplified monthly example:
If the truck traveled 10,000 total miles during that same period:
In this simplified example, the estimated cost per mile is $1.17. If the expenses or mileage change, the result changes as well.
FREE CALCULATORShould Deadhead Miles Be Included?
For business planning, it is useful to remember that an empty mile is still a mile the truck travels.
Deadhead can consume fuel, use driver time and add wear to the equipment even though the truck is not generating freight revenue during that portion of the trip.
If you calculate operating cost using only loaded miles, you may create a distorted picture of how much your overall operation costs to run.
When comparing a specific load, consider the miles required to reach the pickup as well as the loaded miles required to complete the delivery.
Common Cost-Per-Mile Mistakes
Ignoring less obvious expenses
Fuel is easy to see because you pay for it frequently. Insurance, permits, repairs, tires and other expenses may be easier to overlook when evaluating individual loads.
Using only loaded miles
If the truck regularly travels empty between loads, loaded miles alone may not represent the real distance required to generate the revenue.
Using outdated numbers
Operating expenses can change. Fuel prices, insurance, maintenance and mileage patterns may all shift over time. A calculation based on old records may become less useful.
Treating cost per mile as the rate you should charge
Cost per mile is an estimate of operating cost. It is not automatically the rate you should accept or charge. A business also needs room for profit, uncertainty and other financial goals.
How to Use Cost Per Mile When Evaluating a Load
Suppose you are offered a load with a strong advertised rate per loaded mile. Before deciding that it is profitable, look at the complete trip.
Estimate the total miles, including deadhead. Multiply those miles by your estimated cost per mile to get a rough operating cost for the movement.
You can then compare the estimated trip cost with the load revenue. This does not capture every possible business factor, but it gives you a more useful starting point than looking at the headline rate alone.
Frequently Asked Questions
What is cost per mile in trucking?
Cost per mile is an estimate of how much it costs to operate a truck for each mile driven. A common calculation divides operating expenses by total miles driven during the same period.
Should deadhead miles be included?
For overall operating-cost planning, including all miles can provide a more complete picture because empty miles still use fuel, equipment and time.
Is cost per mile the same as rate per mile?
No. Cost per mile estimates what it costs to operate the truck. Rate per mile measures revenue relative to mileage. The difference between revenue and cost contributes to the financial result of the trip.
How often should cost per mile be updated?
There is no single required schedule. The important point is to use current business records often enough that meaningful changes in expenses and mileage are reflected in your estimate.
Can Torz Freight calculate cost per mile for me?
You can use the free Torz Freight Cost Per Mile Calculator and enter your own expense and mileage figures. The calculator is intended for planning and informational purposes.
This guide provides general educational information and is not accounting, tax, legal or financial advice. Actual operating costs vary by carrier and operation.