On this page
- What TCO is
- The cost components
- A simple formula
- Worked example: equipment
- Worked example: software
- Where TCO matters most
- Where it matters less
- Hidden costs people forget
- How to build a TCO comparison
- TCO and the lifetime of different purchases
- Limits of TCO
- Vocabulary worth knowing
- Next steps
- Frequently asked questions
Key takeaways
- Total cost of ownership (TCO) is the full cost of buying, using, maintaining and disposing of something over its lifetime.
- A simple model adds acquisition, operating, maintenance, risk and end-of-life costs for the period you will use the item.
- TCO often reverses a price-only comparison, especially for equipment, software and services.
- You rarely have perfect numbers. Use reasonable estimates and be clear about your assumptions.
- Apply TCO to purchases where running cost is large compared with purchase price.
Two printers. One costs 200 dollars and the other 450 dollars. The cheap one uses cartridges at 60 dollars each that print 300 pages. The dearer one uses cartridges at 55 dollars that print 2,000 pages. Which is cheaper depends on how much you print.
That is total cost of ownership in a sentence. The purchase price tells you what you pay first. It does not tell you what you pay in total.
What TCO is
Total cost of ownership is an estimate of all the costs associated with a purchase over the period you will own and use it. It includes the purchase price and everything that comes with it: installation, training, operation, maintenance, support, downtime, risk and the cost of disposal or replacement.
Total cost of ownership is the sum of all direct and indirect costs of acquiring, operating, maintaining and retiring an asset or service over its useful life.
The cost components
| Component | Examples |
|---|---|
| Acquisition | Purchase price, delivery, taxes, installation, setup, integration |
| Operating | Energy, consumables, licenses, subscriptions, staff time to run it |
| Maintenance and support | Service contracts, repairs, spare parts, upgrades, helpdesk |
| Training and change | Training, documentation, productivity dip while people learn |
| Risk and downtime | Cost of failure, lost production, security incidents, compliance penalties |
| End of life | Disposal, data migration, early termination fees, exit costs, residual value as an offset |
A simple formula
TCO equals acquisition cost plus operating cost over the period, plus maintenance and support over the period, plus training and change costs, plus expected risk costs, plus end-of-life costs, minus any residual value.
You do not need to be precise. The goal is to compare options on the same basis, so that large hidden costs become visible.
Worked example: equipment
Machine A: price 80,000 dollars. Energy and consumables 9,000 a year. Maintenance 4,000 a year. Training 2,000. End-of-life disposal 1,500. Five-year TCO: 80,000 plus 45,000 plus 20,000 plus 2,000 plus 1,500 equals 148,500 dollars.
Machine B: price 100,000 dollars. Energy and consumables 6,000 a year. Maintenance 3,000 a year. Training 3,000. End-of-life disposal 1,500. Five-year TCO: 100,000 plus 30,000 plus 15,000 plus 3,000 plus 1,500 equals 149,500 dollars.
The cheaper machine costs 20,000 dollars less to buy and nearly the same over five years. Change the assumed life to seven years and Machine B becomes cheaper. The result depends on how long you will use it, which is why you state the period.
Worked example: software
Tool X: 12 dollars per user per month for 100 users, 14,400 a year. Setup 5,000. Training 3,000. Integration work 8,000. Admin time equal to a quarter of a person, say 15,000 a year. Three-year TCO: 43,200 plus 5,000 plus 3,000 plus 8,000 plus 45,000 equals 104,200 dollars.
Tool Y: 20 dollars per user per month, 24,000 a year. Setup 2,000. Training 1,000. Integration included. Admin time equal to a tenth of a person, 6,000 a year. Three-year TCO: 72,000 plus 2,000 plus 1,000 plus 0 plus 18,000 equals 93,000 dollars.
Tool Y has the higher license price and the lower total cost, because it needs less setup and administration.
Where TCO matters most
- Equipment and vehicles. Energy, maintenance and lifespan outweigh the price.
- Software and technology. Implementation, integration and support exceed license fees.
- Outsourced services. Management overhead, quality issues and switching costs.
- Facilities and long-lived assets. Running costs dominate over decades.
- Anything with consumables. Printers, machines, tools.
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Where it matters less
For a one-off, low-cost item with no running costs, price comparison is enough. Do not build a model for a box of pens.
Hidden costs people forget
- Internal time. Staff hours to manage the supplier, fix problems and process paperwork.
- Switching costs. What it takes to leave: data migration, retraining, contract exit fees.
- Quality failures. Rework, returns, customer complaints.
- Delivery problems. Expediting, stock buffers, lost sales.
- Price creep. Renewal increases, add-on charges, overage fees.
- Compliance and risk. Fines, audits, security incidents.
How to build a TCO comparison
- Decide the period you will use the item.
- List every cost category that applies.
- Get numbers from suppliers, your own records and colleagues who know the operation.
- Estimate what you cannot measure and write down the assumption.
- Total each option on the same basis.
- Test the result by changing the biggest assumptions to see if the ranking changes.
- Combine the result with non-cost factors such as quality and risk.
Use TCO alongside how to choose a supplier and strategic sourcing. For software, see the vendor pricing guides for how list prices differ from real costs.
TCO and the lifetime of different purchases
| Purchase | Typical period to model | Biggest hidden cost |
|---|---|---|
| Laptops and phones | Three to four years | Support time and replacement of failed units |
| Software subscription | Three years or contract term | Implementation and administration time |
| Production machinery | Seven to fifteen years | Energy, maintenance and downtime |
| Vehicle fleet | Four to six years | Fuel, servicing and resale value |
| Outsourced service | Contract term | Managing the supplier and switching costs |
These periods are rules of thumb for modeling. Use your own experience of how long things really last in your business.
Limits of TCO
- It relies on estimates, and false precision misleads.
- It depends heavily on the period chosen.
- It can understate benefits, such as a feature that earns revenue.
- It can be gamed by choosing assumptions to favor one option.
Treat TCO as a tool to challenge price-only thinking, not as a final answer. Pair it with judgment.
- State the period you will use the item.
- List acquisition, operating, support, training, risk and end-of-life costs.
- Use the same period and categories for every option.
- Write down every estimate and who provided it.
- Test the ranking by changing the two biggest assumptions.
- Add quality and risk considerations before deciding.
Vocabulary worth knowing
- Capital expenditure. Spending on long-lived assets.
- Operating expenditure. Ongoing costs of running the business.
- Life cycle cost. Another name for total cost of ownership, often used for assets.
- Residual value. What an asset is worth at the end of its use.
- Switching cost. The cost of moving to a different supplier or system.
- Net present value. A way of comparing costs and benefits over time by discounting future amounts.
Next steps
Use TCO when you choose a supplier and when you plan a strategic sourcing project. To see how it connects to the savings you report, read procurement KPIs.
Frequently asked questions
What is total cost of ownership?
It is the full cost of acquiring, operating, maintaining and retiring something over its useful life, not just the purchase price.
How do you calculate TCO?
Add acquisition, operating, maintenance and support, training, risk and end-of-life costs for the period of use, then subtract any residual value.
Why is TCO important in procurement?
It prevents decisions based on price alone, which often choose the option that costs more over time.
What is the difference between TCO and price?
Price is what you pay to acquire. TCO includes everything else you pay while using it and when you retire it.
When should you use TCO?
Whenever running, support or switching costs are large compared to the purchase price, such as equipment, software and long-term services.