Writing to a Foundation: The Letter of Inquiry, the Full Proposal, and the Report That Earns the Renewal

The short answer. Foundation funding is won in three stages: a letter of inquiry or initial application that establishes fit, a full proposal that makes the case in the funder’s own terms, and a report at the end of the grant period that gives the funder a reason to renew. Unlike a government application, a foundation proposal is rarely scored against a published rubric. It is read by a program officer who must then recommend it to a board, and the proposal’s real task is to give that program officer what they need to make the recommendation.

Why foundations are worth the effort

Giving USA reports that foundations gave an estimated $117 billion in 2025, about 19 percent of all charitable giving in the United States. Private foundations are also required by federal tax law to make qualifying distributions each year of roughly 5 percent of the value of their investment assets (26 U.S.C. 4942), which means the money must go somewhere. A foundation that has not met its payout by the fourth quarter has a practical reason to move quickly on a well-prepared request.

Foundation funding also tends to carry fewer compliance obligations than a government award, and a growing number of funders offer general operating support rather than restricting the grant to a single project. For many organizations, that flexibility is worth more than a larger restricted award.

Research before writing

The most common reason a foundation declines a proposal is not the quality of the writing. It is that the proposal was sent to the wrong funder. Before drafting anything, confirm three things.

First, what the foundation has actually funded. Its published priorities describe what it intends; its grants list shows what it does. Private foundations report their grants on Form 990-PF, which is public and available through Candid and the IRS. Look at the size of recent grants, the geography, the type of organization, and whether grants go to first-time grantees or mostly to repeat recipients.

Second, how the foundation accepts requests. Some accept unsolicited letters of inquiry; some accept applications only by invitation; some use an open portal with fixed deadlines. A foundation that states it does not accept unsolicited proposals means it, and the better approach is an introduction through a board member, a peer grantee, or a program officer at a convening.

Third, what kind of support is available. Project support, general operating support, capacity-building grants, and capital grants are distinct, and a foundation that offers one may not offer the others.

The letter of inquiry

A letter of inquiry is typically two or three pages. It should state the request in the first paragraph, with the amount and the period. It should then describe the need in terms the foundation uses, the approach, the organization’s qualifications, the expected results, and the total budget with other sources of support.

The letter is a screening document. A program officer reading forty of them is looking for a reason to invite a full proposal, and the reason is almost always alignment: a request that fits the foundation’s stated strategy, from an organization that can plausibly deliver it, at an amount within the foundation’s normal range. Write to that test.

The full proposal

A full proposal generally includes a statement of need, a program description with goals and measurable objectives, an evaluation plan, a description of organizational capacity, a project budget and an organizational budget, and attachments such as the IRS determination letter, a board list, and the most recent financial statements.

Three practices distinguish proposals that are funded.

Answer the question asked. Many foundations publish specific questions with word limits. Answer each one directly and in order, using the funder’s terms. A proposal that repurposes a government narrative without adjusting its structure reads as exactly that.

Make the budget tell the same story as the narrative. Every activity described in the program section should appear in the budget, and every budget line should be explained in the narrative. Foundation policies on indirect costs vary widely. Some cap overhead at a fixed percentage, some fund full costs, and some make general operating grants that make the question moot. Read the policy before building the budget.

Be specific about results. “Serve more families” is not an objective. “Enroll 120 families in the program by June 30, with 80 percent completing at least six sessions” is. The funder will ask about it in the report, and a measurable objective written now is much easier to report against later.

The report that earns the renewal

The final report is the most neglected document in foundation fundraising and the most consequential for the next request. It should compare results to the objectives in the proposal, explain variances plainly, describe what the organization learned, and account for the funds as the grant agreement requires.

If the organization needs to spend restricted funds differently from the approved proposal, it should ask the foundation in writing before doing so. Restricted gifts must be used for the purpose the donor specified, and a request to modify the purpose is routinely granted when it is made in advance. The same change discovered in a final report is a different conversation.

Between grant cycles, keep the program officer informed with short updates: a milestone reached, a news story, a site visit invitation. Foundations renew relationships as much as they renew grants.

Legal references: 26 U.S.C. 4942 (minimum distribution requirement for private foundations); 26 U.S.C. 6033 and Form 990-PF (annual return and grants disclosure). Giving figures from Giving USA 2026: The Annual Report on Philanthropy for the Year 2025.

This article is general information about foundation fundraising. It is not legal or tax advice.