Total cost of ownership is the full lifetime cost of an asset: purchase price plus running, maintenance, support and disposal costs.
Total cost of ownership (TCO) is the full cost of an asset over its whole service life: the purchase price plus everything it takes to run, maintain, support, insure, and eventually dispose of it, less anything recovered at resale. It is the antidote to sticker-price thinking - the number that explains why the cheap printer with expensive ink loses to the dear printer with cheap ink. Where asset valuation asks what an asset is worth, TCO asks what it actually costs you to keep.
What TCO includes
- Acquisition - purchase price, delivery, installation, initial accessories, the time spent setting it up.
- Operation - consumables, energy, software licences, insurance, hosting or connectivity.
- Maintenance and repair - servicing, parts, labour, support contracts.
- Indirect costs - training, downtime while it is broken, the admin of managing it.
- End of life - disposal fees, data wiping, decommissioning, minus any resale or trade-in value.
Not every line applies to every asset. For a webcam the running costs are near zero; for a van, fuel and servicing dwarf the purchase price over a few years.
A simple TCO formula
For most equipment decisions a basic version is enough:
TCO = purchase price + (annual running costs x years of service) + disposal cost - resale value
Dividing TCO by the years of service gives a cost per year, which is the fairest way to compare options with different lifespans.
A worked example: an office laptop
Say a laptop costs €1,000 to buy, with a €150 docking station. Software and support run €100 per year over a three-year life, and it needs one €120 screen repair along the way. At year three it sells second-hand for €100.
- Acquisition: €1,000 + €150 = €1,150
- Running costs: €100 x 3 = €300
- Repairs: €120
- Resale: -€100
- TCO: €1,470, or €490 per year
A rival laptop at €1,200 with the same €150 dock and €300 of running costs, but no repair and a €250 resale, lands at €1,400 - cheaper to own despite costing €200 more to buy. That reversal is the whole point of the exercise.
Common mistakes in TCO analysis
- Comparing unequal lifespans on totals. A five-year asset will always have a bigger total than a three-year one; compare cost per year instead.
- Ignoring staff time. Setup, troubleshooting, and admin are real costs even when no invoice arrives.
- Forgetting end of life. Disposal fees and data wiping are easy to omit; so is resale value, which works in your favour.
- Guessing the maintenance line. Without repair records per asset, the maintenance estimate is folklore - and it is usually the line that decides the comparison.
TCO in practice
The hard part of TCO is not the arithmetic, it is the data: purchase prices live in the accounts, repair invoices in a drawer, useful-life assumptions in someone’s head. A register that holds each asset’s purchase price, supplier, warranty dates, and repair history in one record - the operational sibling of the fixed asset register - turns the estimate into a lookup. AMPthilly records purchase price, warranty, and expected useful life per asset and attaches repair invoices to service tickets, so the running-cost line of a TCO calculation can be read off rather than guessed.
Related terms
- Asset Valuation - what the asset is worth, as opposed to what it costs to keep
- Amortisation - spreading intangible costs such as licences over their useful life
- Capitalisation Threshold - the cost line that decides whether a purchase becomes a fixed asset
- Fixed Asset Register - the record TCO inputs should come from
- Impairment - when an asset’s recoverable value drops below its book value