It should be the cost management plan:

A cost management plan is a document that helps you map and control a budget. It enables project managers to estimate their costs, allocate resources to the right areas, and control overall spending.

Cost management plans keep all project costs in one place, including direct and indirect costs. A project manager will track these costs to ensure there are no budget overruns.

A cost management plan example could be the budget for a home improvement project. Direct costs would include hired labor and building materials. Indirect costs would include equipment rental fees, insurance, and general maintenance.