Most foundations never see your full proposal. They see your letter of inquiry first and if it doesn’t move them, the proposal never gets the chance to follow.

 

An LOI isn’t a formality, and it isn’t just your full proposal with the details cut out. It’s a specific kind of persuasive writing with one job: to make a funder want to read more. In two pages or less, it has to establish that your organization is credible, that the problem you’re addressing is real and significant, that your approach makes sense, and that your work aligns with what this specific funder cares about right now.

 

Grant writers who get this right consistently have one of the more useful skills in grant writing. And getting it wrong is one of the most common reasons organizations never reach the full proposal stage.

 

What is a letter of inquiry and how is it different from a full proposal?

 

A letter of inquiry, commonly called an LOI, is a brief document, typically one to three pages, that introduces your organization and project to a potential funder and requests permission or an invitation to submit a full grant proposal. Some foundations use it as a required screening step. Others accept unsolicited LOIs as a way to assess initial fit before inviting proposals. A small number use the LOI as the only submission they review before making a funding decision. Including a letter of inquiry in your funder outreach still means grabbing a reader’s attention and proving the project is worth funding, just compressed into a fraction of the space a full proposal gets.

 

The key difference from a full proposal is compression. Every section that a full proposal develops at length, including the needs statement, program description, organizational capacity, budget overview, and outcomes, appears in the LOI in a sentence or two at most. The discipline required to convey all of that within two pages, without losing the specificity that makes it compelling, is where most LOIs fall apart.

 

Why do foundations ask for an LOI?

 

Understanding the funder’s perspective on the LOI changes how you approach writing it. An LOI exists to help foundations screen for fit before committing review staff to a full proposal. In other words, it exists to protect the funder’s time, not to create more work for applicants.

 

From this perspective, an LOI that immediately demonstrates mission alignment, organizational credibility, and program specificity is doing exactly what the funder needs it to do. An LOI that requires the reviewer to search for the connection between your work and their priorities, or that describes a problem in vague terms without data, is the kind the funder is screening out.

 

That makes the LOI harder to write than a full proposal in some ways; it has to show need, fit, feasibility, and judgment all at once, with almost no space, no appendices, and no room for drift.

 

Before you write: what research the LOI requires

 

Writing a strong LOI is not the first step. The research that informs it is.

 

Review the funder’s 990 filings. Candid’s searchable 990 database is the quickest way to find them. Three years of 990 data reveals who the foundation has actually funded, at what dollar amounts, in what geographic areas, and for what program types. The difference between what a foundation says it funds on its website and what it actually funds in practice is often significant. Your LOI should reflect the actual pattern, not the stated mission.

 

Check whether the foundation accepts contact before submission. Some foundations are open to a brief introductory conversation with a program officer before you submit an LOI. Finding the right foundation funders often starts with exactly that kind of warm introduction. Others explicitly prohibit contact and state this on their website – calling a foundation before you apply is worth avoiding if they’ve said not to; reaching out anyway will antagonize them and hurt your application’s chances.

 

Know the grant amount range. The amount requested should reflect not just your needs but research into typical award size for this funder. A foundation that typically awards $15,000 to $25,000 receiving an LOI requesting $250,000 is a mismatch that signals a lack of research before the reviewer finishes the first paragraph.

 

Confirm the foundation accepts unsolicited LOIs. Some foundations only review proposals from organizations they have invited or that have been referred by a current grantee. Submitting an unsolicited LOI to a foundation that does not accept them wastes effort and occasionally damages the relationship.
 

What to include in a grant LOI: section by section

 

Most LOIs follow a consistent structure across funder types. Here is what goes in each part and what reviewers are looking for.

 

Opening paragraph: the ask and the alignment. State who you are, what you’re requesting, and why it connects to this specific funder’s mission within the first paragraph. Do not build to the ask. Writing an LOI that opens doors means stating your intent and the amount immediately.

 

A strong opening paragraph looks like this: “The [Organization Name] respectfully requests a $25,000 grant from [Foundation Name] to expand our after-school STEM mentorship program serving 200 underrepresented students in the [City] Unified School District, directly aligned with your foundation’s stated priority of advancing educational equity for low-income youth in the Pacific Northwest.”

 

In two sentences, the reviewer knows who you are, what you want, how much you want, and why it fits their mission. Everything after that is supporting evidence.

 

Statement of need: the problem in brief. Two to three sentences that establish the problem your program addresses, supported by at least one locally-specific data point. There’s no room here for a full needs analysis – just enough to demonstrate you know your community and that the problem is real, documented, and significant.

 

Keep it specific. National statistics alone read as generic. A single county-level or ZIP-code-level figure from a credible, named source demonstrates that your organization is grounded in the actual conditions of the community you serve.

 

Program description: what you do and how. Three to four sentences describing what your program does, who it serves, what activities it delivers, and what outcomes it produces. Name the population specifically. Describe the core program activities in concrete terms. State one or two measurable outcomes from prior work that demonstrate your program produces results.

 

This section should answer the question every funder asks: does this organization know what they are doing? Specific program descriptions that name real activities, real participants, and real outcomes answer that question. Vague descriptions that use phrases like “holistic, wraparound services” without further definition do not.

 

Organizational capacity: why you. Two to three sentences establishing why your organization is the right one to do this work. Years of operation, number of people served, relevant partnerships, organizational awards, or a brief statement of prior grant management success all contribute. Keep it brief this is a credibility signal, not a full organizational history.

 

Budget overview: the numbers in brief. State the total project cost, the amount requested from this funder, and a one-sentence description of other funding sources supporting the project. Funders want to see that you have other financial partners and that the grant request is proportional to the overall project. Briefly summarize funds already raised and name your top funders—doing so demonstrates organizational credibility and reduces the perception of dependence on a single funder.

 

Closing: a clear, direct request. End with a specific ask. Do not close with “we hope you will consider our request.” Close with something like: “We would welcome the opportunity to submit a full proposal to [Foundation Name] and are happy to provide any additional information that would be helpful. Please contact [Name] at [contact information].” A closing that names the next step and the contact person makes it easy for the program officer to respond.

 

The most common LOI mistakes that prevent an invitation

 

Experienced grant reviewers see the same patterns repeatedly in LOIs that do not advance.

 

No funder-specific alignment. The LOI reads as if it could have been sent to any foundation on the same day. The funder’s name appears in the opening line and nowhere else. There is no evidence that the writer reviewed the funder’s recent grantmaking or understands what makes this foundation different from the thirty others that fund similar work. Demonstrating researched alignment is one of the biggest factors separating LOIs that advance from those that don’t.

 

Generic need description. Citing national statistics without local context, using passive constructions like “communities across America face challenges with,” or describing the problem in terms so broad that no specific program could be the wrong response. Specificity is the antidote.

 

Burying the ask. Some LOIs spend the first page on organizational history before ever stating what is being requested. Program officers reading dozens of LOIs in a review cycle do not have patience for an ask that appears on page two.

 

Mismatched funding request. Requesting an amount significantly above or below the funder’s typical award range signals that the applicant did not research the foundation’s giving patterns. This reads as either desperation or inattention, neither of which inspires confidence.

 

Weak or absent outcomes. Describing what the program does without stating what it produces is one of the fastest ways to lose a reviewer’s interest. Every LOI should state at least one measurable outcome, drawn from prior program data, that demonstrates the organization’s work actually changes something.

 

Solicited vs. unsolicited LOIs: how the approach differs

 

Solicited LOIs are submitted in response to a foundation’s explicit invitation or requirement. The foundation provides guidelines, often specifying format, length, required sections, and submission method. Follow those guidelines exactly. Deviation signals that you did not read the instructions, which is a poor first impression for an organization asking to be trusted with a grant award.

 

Unsolicited LOIs are submitted proactively to foundations with no prior relationship. These require more investment in funder research and more precision in alignment framing, because you’re making the case for relevance without any prior signal from the funder that your work is in scope. Reaching out cold can still work – an LOI is a solid way to introduce yourself, provided you’ve confirmed the foundation accepts unsolicited contact and that your work fits their giving history.

 

After the LOI: what happens next

 

If your LOI is successful, the foundation will invite you to submit a full proposal, often with specific guidance on format and content. Respond promptly and carefully. The full proposal is where you build out everything the LOI introduced: the detailed needs statement, full program description, complete budget, evaluation plan, and organizational qualifications.

If your LOI is declined, the foundation may or may not provide feedback. When feedback is offered, take it seriously. It reflects what program staff noticed when reading your submission. When no feedback is provided, a brief follow-up email asking whether there is anything you should know for future applications is often welcomed and occasionally produces useful guidance.

 

For organizations submitting LOIs to multiple foundations across a funding cycle, professional grant writing companies that understand the nuances of funder-specific alignment and have experience tailoring LOIs to different foundation types can significantly improve both the quality of individual submissions and the efficiency of the overall process.

 

Working with professional grant writing services for LOI development is particularly valuable for organizations new to foundation fundraising or those pursuing major new funder relationships for the first time.

 

Frequently asked questions

 
What is the difference between a letter of inquiry and a letter of intent?

Both are abbreviated as LOI, which creates confusion. A letter of inquiry asks a funder for permission to submit a full proposal, or introduces a project to gauge interest. A letter of intent notifies a funder that your organization plans to submit a proposal, often as an administrative step in a formal grant competition. Read the funder’s instructions carefully to determine which they are requesting.

 

How long should a grant LOI be?

One to three pages is standard. Most foundation LOIs are strongest at two pages. If the funder specifies a length, follow it exactly. If no length is specified, two pages is a safe default. The discipline of staying within two pages is itself a demonstration of the writing quality the funder will expect in a full proposal.

 

Should you call the foundation before submitting an LOI?

Only if the foundation’s website or grant guidelines indicate contact is welcome. Some foundations actively encourage pre-submission conversations with program officers. Others explicitly prohibit contact. When in doubt, check the guidelines. A phone call to a foundation that does not want contact before submission does more harm than good.

 

What is the most important thing to get right in an LOI?

Funder alignment. Reviewers can forgive a proposal that is a bit long or formatted differently than expected. They cannot overlook a submission that clearly does not fit their mission or giving priorities. The research you do before writing the LOI matters more than the writing itself.

 

Can you submit the same LOI to multiple funders?

A template structure is fine. The same letter sent verbatim is not. Every LOI should be customized to reflect the specific funder’s mission, priorities, and giving history. A program officer who recognizes that the letter could have been sent to any foundation on the same day will not invite a full proposal.

 

What should you do if your LOI is declined?

Review your funder research. Assess whether the alignment was actually strong or whether the LOI was submitted to a funder that was never a realistic match. If alignment was strong, consider requesting brief feedback and whether the foundation encourages resubmission in a future cycle.