A Work Proposal indicates a business’s intent to engage in a project with another company while outlining the specifics of the proposed contract. A Letter of Intent, while similar, is a much more condensed version of the former.
A Work Proposal is an informative disclosure document outlining how you will handle a project, its benefits, and its outcome, but it isn’t legally binding. Once the project is approved and perhaps even modified, the parties involved can sign a Project Contract. That creates a legal bond and sets the terms to which everyone must adhere.
It’s advised for you to write parts of your Work Proposal since you probably know the details of the project better than anyone. However, some legal or industry-specific guidance is recommended to ensure you don’t leave out any key talking points of the proposal.