Proposal Writing
Grant Letter of Inquiry: How to Write One
Marisa Calderón, GPC
February 15, 2026 · 4 min read
Table of contents
Key takeaways
- A letter of inquiry is a short pitch, usually one to three pages, that asks a funder to invite a full proposal.
- Its job is to prove fit and spark interest, not to make the complete case.
- Include the problem, your solution, the amount requested, and why this funder fits.
- Lead with the funder's priorities, not your organization's history.
A grant letter of inquiry is a brief letter, usually one to three pages, that introduces your organization and project to a funder and asks whether they would like to receive a full proposal. Many foundations use it to screen for fit before inviting a complete application, so its job is to spark interest and prove alignment, not to make the entire case. A strong letter of inquiry covers the problem, your solution, the amount requested, and why this particular funder is the right match.
This guide covers what to include, the structure funders expect, and how to lead with their priorities.
Why funders use a letter of inquiry
Reviewing full proposals is expensive for funders, so many ask for a short letter first to filter out poor-fit requests. For you, that is good news: a one-page letter takes a fraction of the time a full proposal does, so you can approach more funders and invest your full effort only where there is genuine interest.
Treat the letter as a qualifying conversation rather than a complete pitch. The single question it must answer is "should we want to learn more?" For how this fits the larger application process, see our pillar on the full grant application process.
What to include
A complete letter of inquiry moves through a predictable arc, compressed:
- Opening hook and fit. One or two sentences that connect your work to the funder's stated priorities.
- Organization snapshot. A brief credibility statement: who you are and why you can do this.
- The problem. A condensed version of your need, with one or two strong data points.
- Your solution. What you propose to do and the outcomes you expect.
- The request. The amount and the project period.
- The ask to proceed. A clear invitation for the funder to request a full proposal.
Keep each element tight. The full detail belongs in the proposal that, ideally, follows.
Lead with the funder, not yourself
The most common mistake is opening with paragraphs of organizational history. Funders read their own priorities first, so open by showing the match. A line such as "Your foundation's focus on early childhood literacy aligns directly with our work in two Title I schools" earns more attention than "Founded in 2009, our organization has served the community for over a decade."
This reflects the same principle that governs the full application: the request is about the community's problem and the funder's goals, not your need for money. Compress the case you would make in a full needs statement into one or two of its strongest sentences.
Letter of inquiry versus concept paper
The two are close cousins and the terms are sometimes used interchangeably, but there are differences in emphasis. A letter of inquiry is formatted as a letter and leans toward relationship and fit; a concept paper is often slightly longer, more structured, and more focused on the project's design and feasibility.
If your funder specifically requests a concept paper, follow that format instead. Our grant concept paper guide covers the structure, and either way the goal is the same: earn the invitation to submit the full request.
A simple structure to follow
Use this skeleton, sized to one to three pages:
Paragraph 1: the fit and the ask in brief. Paragraph 2: who you are and why you are credible. Paragraph 3: the problem, with one or two data points. Paragraph 4: your solution and expected outcomes. Paragraph 5: the amount requested and the request to submit a full proposal.
End politely and concretely, naming a willingness to provide more information. To preview what the full proposal will contain, you can sketch the project against our sample grant proposal before you write the letter.
What happens after you send it
A letter of inquiry rarely produces an instant answer, and knowing the rhythm keeps you from misreading silence. Most foundations review letters in batches tied to board meetings or quarterly cycles, so a response can take anywhere from a few weeks to a few months. Three outcomes are possible: an invitation to submit a full proposal, a decline, or a request for more information that signals genuine interest. Treat each as useful signal rather than a verdict on your organization.
If you have heard nothing past the funder's stated timeline, a single brief, polite follow-up is appropriate; repeated check-ins are not. When an invitation arrives, move quickly and build the full application directly from the letter, expanding each compressed element into its proper section so the proposal reads as a continuation rather than a fresh pitch. A decline is worth a short, gracious reply, because foundation program officers change funds and priorities over time, and a letter that fit poorly this year may fit well next cycle. The relationship you protect with a courteous response often matters more than the single decision in front of you, since most foundation funding grows out of repeated contact rather than a first cold approach.
Before you send
Confirm the funder accepts letters of inquiry and follow their format and length rules exactly. Address it to the right person, proofread it, and make sure the amount you name is realistic for the funder's typical award. When the opportunity matters, our grant writing team helps you craft a letter that opens the door to a full proposal.
