How to Write a Winning Proposal Cover Letter (Plus 5 Real Examples)

First impressions are important—especially in the world of proposals.

That’s why writing a good cover letter is an essential step towards winning a bid. In the request for proposal (RFP) process, this single-page letter marks your first opportunity to grab a prospect’s attention and make it clear that your company is uniquely positioned to solve their problem. So if you’re currently using boilerplate copy… Stop. Immediately.

In this blog, you’ll learn how to write custom proposal cover letters that grab a prospect’s attention and increase your chances of winning RFP responses. Plus, five examples of real proposal cover letters from industry pros.

In this article, you’ll learn: 

1. What is a Proposal Cover Letter?
2. What to Include in a Proposal Cover Letter
3. How to Write a Proposal Cover Letter
4. 5 Real Proposal Cover Letter Examples ⭐
5. Next Steps: Build Quality Proposals Faster

A proposal cover letter is a single-page document used to pitch your business offerings to a potential client. In it, the customer can tell whether you’re genuinely engaged and have done your research—or if you’ve simply copy and pasted generic language from past business proposals.

It’s also your first opportunity to convince a client to why they should continue reading your proposal. Considering the average team spends 32 hours writing a single RFP response, it’s critical that your proposal cover letter makes a good impression.

Like any good cover letter, your proposal should open with a unique offer or positioning. It’s important to establish early on why your team is best suited to solve a client’s problem.

A strong proposal cover letter includes:

• A greeting: Introduce your company and what you do.
• Clear summary: Describe your value propositions at a high-level. Be sure to connect these points to your client’s needs. (Also known as an executive summary.)
• Personalized offer: Explain to the client what you can uniquely provide to solve their problem.
• Relevant references: Help the prospect understand why they should choose you over competitors.
• Visuals: If you have a designer on your team, include visuals that help emphasize the most important content on this page. For example, use callout boxes to make value propositions stand out for busy procurement teams who are skimming the page.

From the offer you present, to the visuals you include, the details in your proposal cover letter should be all about the client. The goal is to show how your company shines before they even get into the details of your proposal. Demonstrate the qualities that you bring to this potential customer by starting out your relationship on the right foot.

Jon Williams, Managing Director of Strategic Proposals, shares the key points you should concisely hit to be successful.

From reading the RFP thoroughly, to outlining a clear offer, there are six critical steps that seasoned proposal professionals recommend you take to craft a quality cover letter. (Psst…you can fast-track these steps by using AI for proposal writing.)

Step 1: Read the RFP Cover to Cover

This step seems obvious, but it’s surprising how many teams skip it. You must read the RFP thoroughly, from cover to cover, before beginning your letter.

While reading, take note of any recurring themes from your prospect. Perhaps they focus on quality of design and ease of use. Or maybe they emphasize needing certain functionalities or features—whatever the case, Kori Warriner of KCI Technologies recommends you consider the following questions as you read through the request for proposal:

Questions to consider:

• What is the client’s reason behind the project? (revitalization, aging infrastructure, etc.)
• ​​Where is the funding for the project coming from?
• Does the client have any hot-button issues regarding the project?
• What is the desired end-result?
• What would speak to the client? (retirement-friendly, aesthetics, budget, etc.)

While questions may differ by industry, the idea remains the same. Reading the RFP thoroughly helps you better understand the problems your prospect is facing. Which in turn help you paint a clearer picture of how your company can support them.

(It can also help spark ideas for win themes, or specific language, that truly resonates with the prospect—more on that later.)

“Instead of saying ‘we are pleased’ or other overused statements such as that, I introduce my company, and then switch back to talking about what we can do to help the client reach their goals,” Kori explains.

Chances are, your prospect is extremely busy. They’re likely to skim your proposal cover letter—which is why you should focus on making it memorable. Use it to create a connection to your prospect and capture their attention early in the proposal.

In the structure of a proposal, the first paragraph is the best place to earn your reader’s attention, shares Senior Proposal Consultant Kelly Allen.

Once you identify their distinct needs, you can formulate which key themes need to be identified in your cover letter. Then, narrow it down to the most persuasive reasons that your prospect should choose your proposal over a competitor. Eileen Kent, President of Custom Keynotes, explains that these are also known as “win themes”.

Win themes should be based on what the customer told you they wanted. Position yourself as the one company that can deliver exactly what your prospect is looking for. To do this well, it’s essential that you also understand what your competition is doing.

Here’s how to brush up on what your competitors are offering:

• Review competitors’ websites
• Read competitors’ financial statements
• Look at review websites like G2 or Forrester reports including your competition
• Ask if clients are willing to share competitors’ past RFPs (You never know, unless you ask)

At this stage, you’ll want to focus on how you can stand out from the competition. Eileen also recommends acknowledging any elephants in the room. By that, she means anything that the client may consider your team’s weakness.

She recommends addressing weak points head on to leave a good impression, “The elephant in the room could be your business size. Address it by talking about how you formed a tight team who have exceeded performance expectations, and worked together for years, so they see that as a strength instead,” she explains.

Step 4: Provide a Personalized Offer

Now that you’ve grabbed your prospect’s attention, you need to maintain it. Do this by outlining clear benefits, which speak directly to their pain points in an enticing and clear way.

You should outline how your product will positively impact the buyer and identify what they will get out of your partnership.

Step 5: Use a Strong Closing Statement

Your closing statement should be concise, reiterate your capabilities, and highlight the value you deliver. But don’t forget that it’s also an opportunity to connect with your prospect through the proposal process.

“To build a connection, you have to ignore outdated writing advice and not be afraid to use real language” says Rebecca Baumgartner, Sr. Manager, Proposals, PFS.

“Whoever is reading your cover letter can immediately tell if you’re hiding behind jargon or parroting the language of the RFP because you don’t understand what they need,” she explains.

“But when you write authentically, you have the opportunity to show the client you’ve been listening.”

When crafting your proposal cover letter, there are a few final checkpoints to leave your prospect with a good impression.

Graphics aren’t necessary for a proposal cover letter, but they can be helpful. For example: highlighting a quote from a customer in a different font, or using callout boxes to emphasize your key value propositions. Use visuals that help to emphasize your main points, not distract from them.

Here’s what Izane Cloete-Hamilton, CPP APMP, of nFold recommends.

• Use a company letterhead
• Address the letter to the individual specified in the RFP
• Sign the cover letter from a senior person at your company
• If the response is from a strategic partnership between two companies, use dual signatures
• Ensure your letter is no longer than one page