Total cost of ownership (TCO)

What it means

TCO, total cost of ownership, covers everything an asset, piece of equipment or information system costs the company over its whole period of use: the purchase price, delivery and installation, energy and consumables, maintenance and repairs, licences and subscriptions, training, the time of its own staff, insurance, and decommissioning and disposal.

The point of TCO is to look at a purchase decision over the entire horizon, not just the price on the invoice. A cheaper machine may use more energy and need more expensive servicing; free software may require costly implementation and support. When offers are compared on TCO, the option that looks more expensive at first often wins.

TCO includes one-off spending, CAPEX, as well as ongoing operating costs, OPEX. Over a longer horizon future costs are often discounted to present value. TCO is part of a wider cost-benefit analysis that sets costs against expected benefits.

How it works in practice

In IT, TCO is used when choosing an accounting system, ERP or cloud services. Besides licences, implementation, data migration, integrations, training, support, upgrades and staff time must be counted. With cloud the costs are spread over time; with own servers they are concentrated at the start and at hardware renewal.

For vehicles and machinery, TCO includes the purchase price or lease, fuel or energy, servicing, tyres, insurance, tolls, taxes and residual value on sale. Comparing an electric car with a combustion car without TCO is misleading, as lower running costs can offset the difference in purchase price.

In public procurement, bids are increasingly evaluated on life-cycle cost rather than lowest price alone. Private companies should also ask suppliers in tenders for the data needed to calculate TCO, such as consumption, service intervals and spare part prices.

What to watch out for

The most common mistake is leaving out hidden costs, especially in-house labour and switching costs. Moving to a new system takes staff time that never appears on an invoice. Exit costs are also forgotten, such as exporting data or terminating a contract, which relate to the risk of vendor lock-in.

TCO is an estimate that depends on assumptions about useful life, energy prices, inflation or utilisation. When comparing offers, use the same assumptions and test how the result changes if they change. A decision that comes out ahead only under one optimistic scenario is risky.