Fleet total cost of ownership: calculator, formula and decisions

Use one period and one scope

Compare vehicles over the same date range and include only cost incurred in that range.
Separate fuel, maintenance, other operating cost and depreciation so the driver of change is visible.
Use trustworthy distance; without it, show total cost but do not invent cost per kilometre.
Treat TCO as a decision input alongside safety, availability and operational fit.

Calculate cost per kilometre

Enter one vehicle’s costs for the same period. The calculator stays in your browser and does not save the values.

Distance travelledKilometres in the selected period

Months in the period

Fuel cost

Maintenance cost

Other operating cost

Depreciation

Use one currency for every cost.

Total cost

MX$178,000

Cost per kilometre

MX$7.12

Annual projection at the same pace

MX$178,000

The fleet TCO formula

Choose a start and end date. Add costs incurred during that period and the loss in asset value attributable to it. Do not mix a full purchase price with one month of fuel, or lifetime maintenance with one quarter of distance.

Cost per kilometre

(fuel + maintenance + other operating cost + depreciation) ÷ kilometres travelled

If distance is zero or unreliable, report total cost only.

What to include

Use categories that can be collected consistently. A more elaborate model is not better if half of its fields are guesses.

Cost group	Examples
Fuel or energy	Card transactions, receipts and charging cost
Maintenance	Preventive service, repairs, parts, labour and tyres
Other operating	Insurance, tax, tolls, parking, permits, washes and fines when policy includes them
Depreciation	Acquisition value minus expected residual value, allocated to the period
Optional overhead	Telematics, administration or financing when applied consistently across the comparison

Handle depreciation consistently

For a simple management view, estimate acquisition value minus expected resale value and spread it over the planned ownership period. For accounting or tax reporting, use the organisation’s approved method instead. Label the method so a forecast is not mistaken for a booked accounting value.

Compare like with like

Cost per kilometre is powerful, but route, payload, vehicle class and age change the answer. Compare similar duties first. A refrigerated truck and a city car should not share a target just because both have plates.

Use the same date range and currency.
Separate active days from workshop days.
Flag missing odometers rather than substituting a fleet average.
Review both total cost and cost per kilometre; either can reveal a different problem.
Investigate changes against the vehicle’s own history before ranking drivers.

Turn TCO into a decision

Use the cost breakdown to identify the next question. Rising fuel cost may point to price, route, driving or vehicle condition. Rising maintenance with falling availability may support replacement. Low cost with repeated safety defects is not a win.

Repair or replace: compare projected repair and downtime with replacement economics.
Vehicle selection: compare expected cost in the intended duty cycle, not catalogue price alone.
Supplier review: track cost, repeat work and days unavailable together.
Budgeting: project from a stable recent period, then state assumptions for distance and price.

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