What is the term used to describe the cost of the solution after the solution has been implemented in production by a vendor?

Application fees is not a standard BABOK or IT finance term for post-implementation vendor costs.

Lifecycle fee is not a recognized term in the BABOK Guide for categorizing vendor costs after solution implementation.

TCO (Total Cost of Ownership) is a broader financial concept that encompasses all costs across the entire lifespan of a solution - including acquisition, implementation, training, and operations - not just the post-implementation vendor fees.

COTS fees are the recurring charges - such as licensing, maintenance, and support - that an organization pays to a vendor for commercial off-the-shelf software after implementation. This term specifically scopes the ongoing financial obligation to the vendor post-deployment, distinguishing it from one-time acquisition or implementation costs. In business analysis, understanding COTS fees is critical when evaluating the long-term financial viability of a vendor-supplied solution.