Whole Life Cost
The total cost of ownership over the lifetime of goods or services: procurement, operation, maintenance, support, and disposal.
Definition
Whole Life Cost (WLC) is the total cost of ownership of goods or services over their full lifetime, including procurement, operation, maintenance, support, training, and disposal costs. Public sector buyers are required to assess WLC rather than just the initial purchase price when evaluating bids for capital goods and long-term service contracts. WLC analysis is required by Treasury Green Book guidance for major procurements and is increasingly embedded into evaluation methodologies for all but the smallest contracts.
How it works in practice
WLC is usually structured around the contract term plus a defined operating period beyond contract expiry where the underlying asset continues in use. For a 5-year IT support contract on equipment with a 10-year useful life, WLC covers the full 10 years even though the contract only spans 5. The cost categories include: acquisition (purchase or licence cost), implementation (configuration, integration, data migration), operation (energy, consumables, ongoing licensing), maintenance (preventive and reactive), training (initial and refresh), support (helpdesk, professional services), and disposal (asset removal, data destruction, environmental compliance). For ICT contracts, WLC is dominated by ongoing licensing and support costs; for construction contracts by maintenance and renewal; for vehicle contracts by fuel, servicing, and residual value. Bid evaluation models often include a WLC calculation template that bidders complete: the published pricing template aggregates the individual cost categories into a total WLC figure that feeds the price evaluation. Suppliers should fill the template completely and accurately; missing categories or implausibly low values invite clarification queries that can disrupt the bid timeline. KimonBids includes WLC templates for common public sector procurement categories.
Common questions
Why is whole-life cost more important than initial price?
Because initial price is often a small fraction of the total ownership cost. For capital goods and long-term service contracts the operation, maintenance, and support costs typically dominate. A solution with higher initial price but lower running cost can be substantially better value over the lifetime. WLC analysis surfaces this clearly.
What time horizon should WLC cover?
The contract term plus a defined operating period beyond contract expiry where the underlying asset continues in use. For a 5-year IT support contract on 10-year equipment, WLC covers the full 10 years. The buyer publishes the WLC horizon in the ITT; bidders should not deviate from it.
How do I price disposal costs?
Use industry-standard rates for the disposal type (data destruction certification, environmental compliance, decommissioning). For ICT equipment, expect £20-£50 per unit for certified data destruction plus secondary market resale value where applicable. For construction, demolition and waste handling cost varies significantly by site; engage a specialist quantity surveyor for non-routine cases.