What is it called when a certain amount of money is given because parts of the project are completed early?

The term used to describe a financial incentive provided because parts of a project are completed early is "incentive payment." This type of payment is designed to encourage contractors to complete work ahead of schedule, thereby improving project efficiency and potentially reducing overall costs. Incentive payments can serve as motivation for subcontractors and workers to meet or exceed deadlines, promoting timely project completion.

In the context of construction projects, such agreements may include stipulations on the level of quality or performance expected in addition to the time constraints. The successful implementation of incentive payments can lead to a beneficial relationship between the contractor and client, which can enhance productivity and satisfaction for both parties involved.

Advance payments typically deal with funds disbursed before work begins or payments made in anticipation of work to be performed, while extra payments may suggest unplanned increases in payment due to changes in scope. Front loading refers to structuring a payment schedule such that larger amounts are paid early in a project, often to improve cash flow for the contractor, but it does not necessarily tie payments to early completion of specific work.