Which document is typically required from a contractor before starting work on a project?

A bid proposal is crucial in the contractor-client relationship as it serves as a formal offer outlining the scope of work, costs, and terms of the project. It provides the client with a comprehensive view of what the contractor plans to do, how much it will cost, and often includes timelines for completion. This document not only helps in establishing expectations but also serves as a reference point throughout the project, ensuring that both parties are aligned on the agreed-upon terms.

Additionally, a bid proposal demonstrates the contractor's understanding of the project requirements and their ability to execute it effectively, making it a standard and expected part of the process before work begins. While other documents like a service agreement or insurance policy may be necessary for various legal or protective reasons, the bid proposal is typically the first step in formalizing the working relationship and outlining the specifics of the undertaking.