In this article, we discuss how to write a business proposal letter and we offer sample letters and templates you can use as a guide. Read our article on the five steps for writing a business proposal letter and get a free template with top examples of successful letters.Learn how to write a business proposal with our step-by-step guide, including a free template and professional examples plus tips. Want to write a formal business proposal? Get a step-by-step guide, with free business proposal examples and templates. Here are a few example proposal letters to inspire you as you create your own. Now it's time to review and finalize your proposal. Sometimes, a facetoface meeting is the best way to present your proposal and answer any questions or concerns. A polished business proposal template is critical to generating new business for your company. Call it a business proposal letter and it's a short, 1 page message to your potential client.