Define the month before dividing
Use all dispatched miles from the same period as your ledger, including empty positioning. Keep records of equipment payments, insurance and permits separately from fuel, tires and mileage-linked costs. A cash planning ledger may include a loan payment; accounting profit handles principal and depreciation differently. Label which question you are answering.
A monthly ledger you can reproduce
The default example uses one truck, one month and 10,000 all miles. The following fictional ledger separates the $5,500 fixed total from $11,000 of variable costs.
| Fictional monthly ledger | Amount | Per 10,000 all miles |
|---|---|---|
| Fixed costs | $5,500 | $0.55 |
| Fuel | $7,000 | $0.70 |
| Maintenance reserve | $2,200 | $0.22 |
| Tire reserve | $600 | $0.06 |
| Tolls and other variable costs | $1,200 | $0.12 |
| Operating total | $16,500 | $1.65 |
Operating break-even is only the first floor
$16,500 ÷ 10,000 = $1.65 per all mile. To model $6,000 owner net pay with a 20% planning reserve, gross up the owner amount: $6,000 ÷ 0.80 = $7,500. Add it to operating cost, then apply the 10% revenue margin: ($16,500 + $7,500) ÷ 0.90 = $26,666.67 required revenue, or $2.6667 per all mile. This reserve is an assumption, not a calculation of tax liability.
Do not add 10% to cost and call it a 10% revenue margin. $24,000 × 1.10 is $26,400; its $2,400 margin is only 9.09% of revenue.
Stress-test utilization
Hold fixed costs at $5,500 and variable cost at $1.10 per mile. Lower mileage spreads the same fixed bill across fewer miles.
| All miles | Fixed per mile | Operating per mile |
|---|---|---|
| 8,000 | $0.6875 | $1.7875 |
| 10,000 | $0.5500 | $1.6500 |
| 12,000 | $0.4583 | $1.5583 |
For a route quote, carry the variable rate and the trip’s fixed allocation into the minimum load-rate model. Check the offer in the load-profit calculator; do not treat operating break-even alone as a sufficient quote.
Turn receipts into the next cost floor
Record receipt date, vehicle, period and category. Reconcile fuel-card charges to receipts before summing fuel. Keep owner draws and transfers separate from operating expense. Explain a large repair rather than hiding it by changing mileage. Use the cost-per-mile calculator for the arithmetic and the weekly review to trace changes back to records.
Continue the owner-operator workflow
Return to the owner-operator calculator hub to connect the cost floor, quote, trip estimate and completed-week review.