Total Cost of Ownership (TCO) is the full lifetime cost of a surveillance system, not just the purchase price. It adds the up-front capital (cameras, servers, storage, switches, licences, installation) to the ongoing operating costs over the system's life — maintenance and support contracts, storage growth, electricity and cooling, network and cloud fees, software updates, and the staff time to run it — usually summed over a five-year horizon.
TCO matters because surveillance buying decisions look very different once the running costs are included. An on-prem system is mostly CapEx with a large day-one bill and modest ongoing cost; a cloud VSaaS is mostly OpEx with a small start and a subscription that never stops. Plotted over time these two cost shapes cross — often somewhere around year two or three — so "cheaper" depends entirely on the horizon you measure. Custom-built systems add a maintenance "mortgage" of roughly 15–20% of the build cost per year.
The pitfall is comparing only the sticker prices. A quote that wins on day-one hardware can lose badly over five years once storage expansion, licence renewals, egress fees, and support are counted — and the line item teams most often forget is the multi-year storage and retention cost, which grows with every added camera and every extra day of retention.
