Creating effective proposals is a critical task that requires careful attention to detail and a strategic approach. A well-written, well thought-out proposal not only communicates your solution to the client’s needs but also positions your firm as the best choice to deliver that solution. However, even the strongest proposals can be undermined by common mistakes that affect clarity, professionalism, and alignment with the client’s goals.
In this post, we’ll explore the top 7 mistakes to avoid when writing and producing an RFP response. We’ll break down what each mistake is, why it happens, and how it can hurt your chances of success. Most importantly, we’ll give you actionable steps on how to solve these common pitfalls, ensuring your proposals stand out in the best way possible, and how to avoid proposal mistakes in the first place.
TL;DR
Avoid these top 7 proposal mistakes to increase your chances of success:
- Failing to showcase the most relevant people and projects.
- Not tailoring your proposal to the client’s specific needs.
- Neglecting to clearly define the scope of work (SOW).
- Making your proposal too long or complex.
- Ignoring the proposal’s visual presentation.
- Skipping proofreading and review.
- Overpromising and under-delivering.
1. Failing to Showcase Your Most Relevant Experience
What the Problem Is
The #1 thing clients care about is seeing relevant experience. That’s why it’s so important to showcase the right people and relevant case studies that align with the client’s needs. However, many firms, especially large enterprises, struggle with this because they can’t quickly pinpoint their most suitable project team, or which case studies are best for the proposal at hand. This often happens because the necessary data is stored in siloed information sources, making it difficult for proposal teams to access and quickly identify the best people and projects for a specific bid.
Why It Happens
This mistake typically arises from poor data visibility across departments and teams. Many firms store resumes, project portfolios, and client case studies in separate systems, making it hard for proposal managers to find and utilize the most relevant content. Proposal teams may not even be aware of the expertise within their own organization because the information isn’t easily searchable or transparent. As a result, they often default to picking someone they know personally or someone who is top of mind, simply because it's the easiest option. This can introduce biases and it often fails to showcase the best person for the job, which can hurt your submission.
How It Can Hurt Your Proposal's Success
Not showcasing your best people and most relevant projects can drastically reduce your chances of winning the bid. If the client cannot easily see that you have the right expertise for the project, they might question whether your team can execute the proposal effectively. Failing to demonstrate the direct relevance of your experience to the client’s needs may lead them to choose another firm that is better able to align their capabilities with the proposal’s requirements.
How to Solve It
To solve this, you need to centralize your team's experience data so that the proposal team can easily access the most relevant information for each bid. Here’s how:
- Build a searchable, organized database of resumes and case studies, to ensure the proposal team can quickly find the right people and projects for any bid.
- Make sure that everyone involved in proposal creation has transparency into the available resources, so they can identify and pull in the most relevant content without delay.
Tip: Flowcase enables you to centralize and search your team’s experience data, helping you showcase the most relevant people and projects for every proposal.
2. Failing to Tailor the Proposal to the Client’s Needs
What the Problem Is
Even if you’ve found a great team and relevant projects, you still need to tailor their resumes and case studies - as well as other proposal content to meet the client’s needs. Skipping this step is a common mistake in the proposal process. Proposals that lack customization end up looking like a one-size-fits-all document, which can make it feel impersonal and disconnected from the client’s unique challenges.
Why It Happens
This mistake often occurs because tailoring a proposal is such a time-consuming process. This is especially true when customizing resumes and case studies, since many of these need to be submitted with each proposal. Given the time constraints, teams often decide that the quickest option is to reuse content from previous submissions instead of taking the time to make them fully relevant for the client’s specific needs.
How It Can Hurt Your Proposal's Success
A proposal that doesn’t address the client’s specific challenges or align with their objectives can come across as lazy or unengaged. If the client feels that the proposal is a generic document that doesn’t truly speak to their needs, they may question whether your firm is the right fit. Tailoring is crucial because it shows the client that you’ve taken the time to understand their needs and that you’re committed to providing a solution specifically designed for them. Without this, your proposal risks being overlooked in favor of a more personalized, focused bid from a competitor.
How to Solve It
To solve this, make sure your proposals are always tailored to the specific client’s needs and objectives. Here’s how:
- Take the time to thoroughly research the client and their industry to understand their challenges, goals, and the context in which they operate.
- Customize your proposal to speak directly to the client’s needs by referencing their specific issues and demonstrating how your solution will address them.
- Ensure that all aspects of the proposal, from the executive summary to the team members and project examples, are relevant and aligned with what the client values.
Tip: Flowcase makes it easier to tailor content by offering a drag-and-drop editor that allows you to quickly edit and reuse previously tailored sections, ensuring proposals are highly relevant and personalized without starting from scratch each time.

3. Neglecting to Clearly Define the Scope of Work (SOW)
What the Problem Is
Another key mistake a firm can make is not clearly defining the scope of work (SOW) in the proposal. The SOW outlines the deliverables, timelines, and responsibilities of both parties, ensuring that both the client and the firm are on the same page. When this section is vague or overlooked, it creates confusion and leaves room for misunderstandings about what will be delivered and when.
Why It Happens
This mistake often happens because proposal teams may not fully understand the complexity of the project or the specific deliverables that will be required. Sometimes, the project scope is still evolving, or there’s uncertainty about the client's exact needs, which leads to a vague or generalized SOW. Proposal teams might also be under time pressure and prioritize getting the proposal submitted quickly over thoroughly defining every detail. Additionally, there’s often a lack of communication between departments—proposal creators may not be fully aligned with the project teams who will actually carry out the work. This disconnect means that certain potential risks or requirements that only the project team might foresee aren't captured, resulting in an incomplete or unrealistic scope.
How It Can Hurt Your Proposal's Success
A proposal without a clear SOW can severely damage your chances of success. Clients want to know exactly what they are getting, and when. A vague or incomplete SOW can raise concerns about your firm’s ability to deliver, leading clients to question the reliability of your project management and execution. Additionally, the lack of a clearly defined scope can cause problems during project delivery, leading to complications such as scope creep—where the client requests additional work that was never agreed upon. This can result in difficult conversations, additional budget needs, and can create tension with the client.
How to Solve It
To solve this, always ensure the SOW is clearly defined and comprehensive. Here’s how:
- Be specific: Clearly outline the deliverables and deadlines for each phase of the project. Make sure there are no ambiguities about what is included and what is excluded.
- Collaborate with the project team: Ensure the proposal team and the project team is on the same page to avoid promising things that shouldn’t be in scope.
- Collaborate with the client: If there is any uncertainty about the scope, work with the client to define it more clearly. This ensures you both agree on expectations from the start.
- Use clear, simple language: Avoid jargon and overly complex descriptions. The SOW should be easy for anyone to understand, including stakeholders who may not be familiar with technical details.
4. Making the Proposal Too Long or Complex
What the Problem Is
Another common mistake when creating proposals is making them too long, dense, or filled with unnecessary details. Proposals that are overly complex can overwhelm the reader and obscure the most important information. A proposal should communicate key details clearly and concisely, ensuring that the client can quickly understand the solution being offered without wading through excessive content. Proposal writers need to bear in mind that the proposal evaluator is often not the person who will carry out the project, and they might not have the same technical expertise and understanding.
Why It Happens
This mistake often happens when teams feel the need to cover every possible detail, including too much background information, technical jargon, or explanations of unrelated services. Teams might also try to impress the client by showcasing the firm’s breadth of expertise, which leads to including irrelevant sections that don’t add value to the specific proposal. Under time pressure, some proposal creators might also add too much detail in an attempt to make the proposal more thorough, not realizing that a concise, well-organized proposal is often more effective than one filled with unnecessary content.
How It Can Hurt Your Proposal's Success
A proposal that is too long or overly complex can actually have the opposite effect of what you intend. Instead of impressing the client, it may cause them to lose interest or become frustrated by the length and complexity of the document. Clients have limited time to review proposals, and if they have to sift through pages of irrelevant information, they may miss the critical points that demonstrate your firm’s value. Additionally, a proposal that is hard to follow or lacks focus can give the impression that your firm is disorganized or not thoughtful in how it communicates.
How to Solve It
To solve this, it’s important to strike a balance between making your proposal clear and easy to understand, while also providing necessary technical details. Here’s how:
- Understand your audience: Recognize that the proposal evaluator may not have the same level of technical expertise as the project team, so adjust your level of detail accordingly.
- Prioritize clarity: Keep the proposal simple and clear, using straightforward language that makes the document easy to follow.
- Use technical information wisely: Include technical details only where they are necessary to support your solution, and be sure to explain any jargon or complex concepts.
- Organize effectively: Structure your proposal with clear headings, bullet points, and summaries to help the client find key information quickly.
Tip: Using Flowcase’s AI Text Reduction tool, you can easily make content more concise. This not only helps to improve readability, but also serves to meet word or page counts.
5. Ignoring the Proposal’s Visual Presentation
What the Problem Is
A proposal’s visual presentation is often just as important as its content. Ignoring the visual aspect of the proposal can hurt the overall impression the client gets. A proposal that looks cluttered, difficult to navigate, or visually unappealing can quickly turn clients off, even if the content is strong. For some proposals, a specific layout is not only recommended, it’s required. Failing to adhere to the designated guidelines could completely wipe out your chances of success.
Why It Happens
This mistake often arises when teams focus too heavily on the technical details and forget that a proposal is also a marketing document. Some teams may not have access to professional design resources or templates, leading to proposals that are inconsistent in format or difficult to read. In other cases, proposal creators may assume that content alone will win the client, without realizing how presentation affects the client’s perception of professionalism. Some firms may also fail to review or understand the specific formatting requirements for the proposal, which can result in non-compliance with the client’s submission instructions. Lastly, sometimes it’s a simple copy and paste error which means that the wrong content is displayed in the wrong section - an innocent but costly mistake.
How It Can Hurt Your Proposal's Success
A poorly designed proposal can lead to negative perceptions of your firm’s professionalism. If the proposal is difficult to read or poorly organized, clients may assume that your firm is equally disorganized in other areas, which can hurt your chances of winning the bid. A cluttered or inconsistent design can also distract the client from the key messages and benefits you’re trying to communicate. Furthermore, failing to meet required formatting guidelines could result in the proposal being disqualified, regardless of how strong your content is.
How to Solve It
To solve this, make sure your proposal is visually appealing and well-organized. Here’s how:
- Follow the client’s formatting requirements: Always review the RFP to ensure you meet the specified formatting guidelines.
- Use professional templates: For bids that don’t require a set layout, use your own templates to create a professional layout and design.
- Maintain consistency: Stick to consistent fonts, colors, and formatting throughout the document to create a cohesive and polished look.
- Prioritize readability: Structure your proposal to be scannable, with clear headings and summaries that allow the client to quickly find key information.
Tip: Flowcase provides customizable templates that ensures your proposal is visually consistent, easy to navigate, and formatted according to client specifications, allowing you to focus on creating compelling content without worrying about formatting compliance. This saves proposal teams thousands of hours.
6. Lack of Proofreading and Review
What the Problem Is
One of the most damaging mistakes in proposal creation is failing to thoroughly proofread and review the document before submission. Typos, grammatical errors, or formatting inconsistencies may seem like small issues, but they can significantly impact the professionalism and credibility of your proposal. A proposal with mistakes can give the impression that your firm is careless or unprofessional, and this could lead the client to question your attention to detail.
Why It Happens
This mistake typically occurs when teams are working under tight deadlines and focus primarily on getting the proposal submitted as quickly as possible. As a result, the final review process gets rushed, and the proposal is sent out without a thorough check. In some cases, the proposal writer may be too close to the document, making it difficult to spot errors or inconsistencies.
How It Can Hurt Your Proposal's Success
A proposal that contains spelling, grammar, or formatting mistakes can harm your chances of success in several ways. First, it may leave the client with the impression that your firm is unprofessional or disorganized. Second, it can distract the reader from the core message of the proposal, causing them to focus on the errors instead of the value you’re offering. Finally, a poorly proofread proposal can lead to misunderstandings or misinterpretations of key points, reducing the clarity of your message and possibly leading to a missed opportunity.
How to Solve It
To solve this, always dedicate time to thoroughly proofread and review the proposal before submission. Here’s how:
- Multiple rounds of review: Ensure that at least two or three people review the proposal, including someone who hasn’t been involved in the writing process. This helps catch errors that may have been overlooked.
- Take a break: After writing the proposal, step away from it for a short period before proofreading. This helps you come back with fresh eyes and a clearer perspective on potential errors.
Tip: As mentioned earlier, Flowcase makes the proofreading process easier by offering built-in AI-powered proofreading features that help catch spelling and grammar errors, ensuring your proposals are polished and professional before submission.
7. Overpromising and Under-Delivering
What the Problem Is
Overpromising in a proposal is a serious mistake that can ultimately damage your credibility and your relationship with the client. This occurs when a firm makes exaggerated claims about what they can deliver, whether it’s in terms of timelines, resources, or the overall scope of the project. While it's tempting to promise more to win the bid, doing so sets unrealistic expectations, and failing to deliver on those promises can lead to significant issues during project execution.
Why It Happens
This mistake often happens because firms are eager to win the proposal and may believe that making bold promises will increase their chances. There is sometimes pressure to stand out among competitors, leading proposal teams to oversell the firm’s capabilities. In other cases, the project team may not be consulted during the proposal phase, so the proposals are written without fully understanding the capacity or constraints of the firm or the project’s complexity. Additionally, the desire to meet client expectations can sometimes cause proposal teams to promise deliverables that are outside the firm’s true capabilities or resources.
How It Can Hurt Your Proposal's Success
Overpromising can significantly damage your chances of success—not only in the proposal stage but throughout the entire project. If the client accepts a proposal with unrealistic expectations, it can lead to disappointment, delays, and even contract disputes. These issues can result in negative reviews or referrals, damaging your reputation in the long run.
How to Solve It
To solve this, focus on being realistic and transparent about what your firm can deliver. Here’s how:
- Be honest: Only promise what you know your firm can deliver. If the project requires resources or capabilities that you don’t have, don’t be afraid to address this and explain how you plan to manage the challenge.
- Consult with the project team: Work with the people who will be carrying out the project to ensure that the commitments you’re making are achievable and aligned with what’s realistic.
- Set clear expectations: Ensure that the timeline, budget, and scope are clearly defined and achievable within the resources available. Be transparent about any limitations or risks, and outline contingency plans where appropriate.
Summary
Creating a winning proposal requires attention to detail, clear communication, and a strategic approach. By avoiding these seven common mistakes, you can significantly improve the quality of your proposals, enhance your firm’s professionalism, and increase your chances of securing the bid.