Fleet total cost of ownership (TCO) calculator

A total cost of ownership calculator estimates the full cost of running vehicles — purchase, depreciation, insurance, maintenance, and fuel or charging — not just the sticker price. This free fleet TCO calculator compares diesel (ICE) and electric options side by side for cars, vans and HGVs.

It uses the same Quick Estimate logic for a fast ICE vs EV total cost of ownership comparison. ZERO’s precise mode adds telematics, EV simulation and depot design for decision-grade planning.

Fleets rarely replace diesel and electric vehicles on the same cycle — EVs are often kept longer to spread their higher purchase cost. Set each lifecycle separately (default five years for ICE, six for EV). The comparison runs over the longer of the two, and the shorter-lived vehicle carries only the proportion of its replacement used inside that window, not a second full purchase.

United Kingdom (GBP, miles, UK MPG), Europe (EUR, km, L/100 km) and North America (USD, miles, US MPG). UK and US gallons differ — the engine converts correctly behind the scenes.

Yes. Turn on infrastructure to model dedicated or shared chargers, AC/DC mix, incentives, rental income and an ICE fuel-site counterfactual, including ROI.