{"head":{"title":"What Is Total Cost of Ownership (TCO) in Software?","description":"Total cost of ownership is everything software costs over its life, not just the price to build or buy. What goes into TCO and how to compare fairly.","canonical":"https://oceanlab.in/glossary/total-cost-of-ownership"},"crumbs":[{"name":"Home","path":"/"},{"name":"Glossary","path":"/glossary"},{"name":"total cost of ownership","path":"/glossary/total-cost-of-ownership"}],"slug":"total-cost-of-ownership","term":"Total cost of ownership (TCO)","aka":["TCO"],"category":"Buying software","short":"Everything a piece of software costs over its life, not just the price to build or buy it.","body":[["TCO adds up the build or licence cost, hosting, third-party services and APIs, maintenance, support, security work, training, and the cost of moving away later. For AI features it also includes model usage, which grows with traffic."],["Comparing options on TCO over the same period, for example three years, is fairer than comparing day-one prices. A cheap licence with expensive per-seat growth, or a cheap build with heavy ",{"href":"/glossary/technical-debt","text":"technical debt"},", can cost more over time."]],"why":["Build-versus-buy decisions are often made on the first invoice. TCO puts running costs next to upfront costs, so a team can see which option is actually cheaper for the way they will use it, and plan budgets for the years after launch."],"example":["A company compares a SaaS helpdesk with building its own. The SaaS has no build cost but charges per agent, and they plan to triple the support team. The custom build has an upfront cost plus hosting and maintenance. Laid out over three years, the answer depends on headcount growth, not on the first-year price."],"inBuild":null,"mistakes":[["Leaving out maintenance. Software that is not maintained gets less secure and harder to change every year."],["Forgetting exit costs: data export, migration and retraining when you switch."],["Comparing options over different periods or with different usage assumptions."]],"related":[{"href":"/glossary/technical-debt","label":"Technical debt","detail":"The future cost of shortcuts taken in code today."},{"href":"/glossary/time-and-materials","label":"Time and materials (T&M)","detail":"A contract where you pay for the hours actually worked, at agreed rates."},{"href":"/glossary/fixed-price","label":"Fixed-price contract","detail":"A contract where the price for an agreed scope is set up front."},{"href":"/glossary/inference","label":"Inference (AI)","detail":"Running a trained AI model on new input to get an output, such as an answer, a label or an embedding."}],"tools":[{"href":"/tools/build-vs-buy","label":"Build vs buy","detail":"Free tool"},{"href":"/tools/software-maintenance-cost","label":"Software maintenance cost","detail":"Free tool"},{"href":"/tools/erp-tco","label":"ERP TCO","detail":"Free tool"}],"links":[{"href":"/software","label":"Software by industry","detail":"Systems we build per industry, with guides and tools."},{"href":"/pricing","label":"Pricing library","detail":"Software and API prices, each with its source and date."}],"sources":[],"legal":false,"updatedAt":"2026-10-25"}