Glossary
What is Total cost of ownership (TCO)?
Total cost of ownership (TCO) is the full lifetime cost of a software purchase, not just its licence fee: implementation, data migration, integrations, training, internal administration, support tiers and the cost of eventually leaving. In SaaS evaluations, TCO is what makes two similar list prices resolve very differently.
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List price is the most visible number and rarely the decisive one. A tool at $3 per user per month that needs a month of internal configuration and a custom accounting integration can cost more over three years than one at $15 that works out of the box.
The components teams most often miss:
Setup and initial fees — sometimes a large one-off charge that never appears in a per-user comparison. Pricing shape, not just level — per-user, flat-rate and volume-based pricing diverge sharply as you grow; a flat fee that looks expensive at 20 people is cheap at 200. Billing basis — some tools charge for every provisioned account, others only for users active that month, which is a large difference when only part of the workforce submits. Integration and compliance work — connecting your accounting system, or meeting a local requirement, is often a project rather than a setting. Exit cost — export formats, retention obligations and re-training when you leave.
The practical discipline is to model TCO at your real headcount and volume over three years, using each vendor's own published rates, rather than comparing sticker prices.
Frequently asked questions
- Why do per-user and flat-rate tools cross over?
- Per-user cost rises linearly with headcount while a flat fee does not, so there is always a crossover point. Finding it for your own numbers — not the vendor's example company — is the whole exercise.
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