# End of Service > End of Service means the date when support for a product is officially discontinued. **Term:** End of Service **Last updated:** 2026-07-29 ## Definition ## What End of Service Means in a Contract End of Service, often abbreviated EOS, refers to the point at which a supplier formally withdraws support, maintenance, or continued availability of a product or service under an agreement. It is a milestone concept rather than a single obligation, marking the boundary between active servicing and a wind-down or termination phase. In technology and software contracts, this term is especially common, describing when patches, security updates, or help desk assistance will no longer be provided. Contracts use End of Service language to give customers predictability. Rather than leaving support obligations open-ended, the clause specifies a defined lifecycle, after which the customer must migrate, renew, or accept the product as is. This is distinct from termination of the agreement itself, since a contract may continue for other purposes even after a specific service component reaches its end of service date. The concept also appears outside pure technology contexts, such as in a