You found the perfect funder. Their priorities match your mission like a lock and key. The grant amount is exactly what you need. You're ready to write a full proposal.
Then you read the fine print: "Submit a Letter of Intent by March 15. Full proposals by invitation only."
Welcome to the LOI — the grant world's audition round. Think of it as your application to apply. Get it right, and you earn the invitation. Get it wrong, and your full proposal never gets written.
No pressure.
What Is a Letter of Intent?
A Letter of Intent (LOI) — also called a Letter of Inquiry or Preliminary Proposal — is a brief document (typically 1-3 pages) that introduces your organization and project to a funder before you submit a full proposal.
It's used almost exclusively by private foundations and corporate giving programs. Federal grants rarely use them (they have their own pre-application processes).
The LOI serves two purposes:
- For the funder: It saves review time by filtering out misaligned requests before full proposals flood in
- For you: It saves you weeks of work by confirming funder interest before you invest in a 20-page proposal
About 60-70% of private foundations that accept unsolicited proposals use some form of LOI process, according to the Foundation Center. If you're pursuing foundation funding, you'll write a lot of these.
LOI vs. Full Proposal vs. Cover Letter
These three documents confuse everyone. Here's the definitive comparison:
| Letter of Intent | Full Proposal | Cover Letter | |
|---|---|---|---|
| **When** | Before the full proposal | The main application | Attached to the full proposal |
| **Length** | 1-3 pages | 5-25+ pages | 1 page |
| **Purpose** | Request permission to apply | Make the full case for funding | Introduce the attached proposal |
| **Budget detail** | Estimated total or brief summary | Line-item budget with narrative | None |
| **Response** | Invitation or decline | Award or decline | None expected |
| **Required by** | Foundations, some corporate programs | All funders | Most foundations, some federal |
A cover letter says "here's our proposal." An LOI says "may we send you a proposal?" The distinction matters.
The Standard LOI Structure
Most funders who require LOIs provide specific guidelines. Always follow their format first. But when guidelines are general or absent, this structure works:
1. Organization Overview (1 paragraph)
Who you are, when you were founded, your mission, and the population you serve. Keep it tight — this isn't your annual report.
2. Problem Statement (1-2 paragraphs)
The need you've identified, backed by data. Similar to your statement of need but compressed. Lead with the most compelling data point.
3. Proposed Project (2-3 paragraphs)
What you plan to do, who it will serve, and how it works. Include key activities, target numbers, and timeline. This is the heart of the LOI.
4. Expected Outcomes (1 paragraph)
What will change as a result? Name 2-3 measurable outcomes. Funders want to see that you're thinking about impact, not just activity.
5. Budget Summary (1 paragraph or brief table)
Total project cost, amount requested from this funder, and other funding sources (committed or pending). No line-item detail — that comes in the full proposal.
6. Organizational Capacity (1 paragraph)
Why you're qualified to pull this off. Past results, relevant experience, key partnerships. Your credibility paragraph.
2 Complete LOI Examples
Example 1: Foundation Grant — Youth Arts Program
Dear Ms. Fontaine,
The Riverside Arts Collective (RAC) respectfully submits this Letter of Intent to the Fontaine Family Foundation's Youth Enrichment Initiative, requesting $40,000 to launch "Canvas to Community," a 10-month visual arts program for underserved middle school students.
About Our Organization
Founded in 2015, RAC provides free arts education to youth in Riverside County's lowest-income neighborhoods. We currently operate three after-school programs serving 180 students annually, with a 91% program completion rate and documented improvements in school engagement among 78% of participants.
The Need
Riverside County eliminated visual arts instruction from all Title I middle schools in 2023 due to budget cuts, leaving approximately 4,600 students without access to arts education during the school day. Research from the National Endowment for the Arts demonstrates that arts participation among low-income youth correlates with a 20% higher likelihood of college enrollment — yet only 12% of Riverside County youth from households below the poverty line currently participate in any structured arts program.
Proposed Project
Canvas to Community will place professional teaching artists in three Title I middle schools for twice-weekly 90-minute sessions serving 75 students total. The curriculum integrates visual arts skill development with social-emotional learning, culminating in a public exhibition at the Riverside Community Gallery. Each student will build a portfolio and participate in a reflective artist statement writing exercise aligned with ELA standards.
Expected Outcomes
By program end, 85% of participants will demonstrate measurable improvement in visual arts proficiency (assessed via portfolio rubric), 75% will report increased confidence in creative expression (pre/post survey), and participating schools will document a 15% reduction in disciplinary referrals among enrolled students.
Budget Summary
Total project cost: $62,000. We are requesting $40,000 from the Fontaine Family Foundation. The remaining $22,000 is committed: $12,000 from the County Arts Commission and $10,000 from our operating budget.
We would be honored to submit a full proposal at your invitation. I can be reached at [email protected] or (951) 555-0173.
With appreciation,
Jorge Morales, Executive Director
Example 2: Corporate Giving Program — Environmental Education
Dear Sustainability Committee,
EcoLearn Alliance submits this Letter of Intent to the Cascade Energy Community Impact Fund, requesting $20,000 to expand our "Power Smart" energy literacy curriculum into five elementary schools within Cascade Energy's service territory.
About Our Organization
EcoLearn Alliance has delivered environmental education programs to K-8 students across the Pacific Northwest since 2018. Our programs have reached 5,200 students in 38 schools, with teacher satisfaction ratings averaging 4.8/5.0 and documented knowledge gains on energy science assessments averaging 35%.
The Need
Despite Oregon's leadership in clean energy policy, surveys show that only 22% of elementary students in rural districts can correctly identify their home's primary energy source or explain basic conservation strategies (Oregon Department of Education, 2025). Energy literacy is a gateway to both environmental stewardship and STEM career pathways — yet it's absent from most elementary curricula.
Proposed Project
Power Smart delivers 8 classroom sessions per school over 10 weeks, combining hands-on energy experiments, take-home family activity kits, and a school-wide energy audit competition. Each participating school receives a Cascade Energy-branded toolkit including a Kill-A-Watt meter set, thermal leak detectors, and student workbooks.
Expected Outcomes
300 students across 5 schools will complete the curriculum. We project a 40% average improvement on energy literacy post-assessments and measurable reductions in school building energy consumption (tracked via utility data) at 3 of 5 participating schools.
Budget Summary
Total program cost: $31,500. Requested from Cascade Energy: $20,000. EcoLearn Alliance contributing $8,500 in staff time and curriculum materials. Oregon Community Foundation grant pending: $3,000.
We would welcome the opportunity to discuss this proposal further. Please contact me at [email protected] or (503) 555-0294.
Best regards,
Rachel Watson, Program Director
Both LOIs are under 2 pages, follow the standard structure, and give the funder enough to make a decision without overwhelming them.
Follow-Up Etiquette After Submitting an LOI
The LOI is sent. Now what?
- Wait the stated timeline. If the funder says "responses within 6-8 weeks," don't email at week 3. Mark the expected response date on your calendar.
- One follow-up is acceptable. If you haven't heard back after the stated timeline, a single polite email is fine: "I wanted to confirm receipt of our Letter of Intent submitted on [date] for the [program name]. We remain very interested and are happy to provide any additional information."
- Don't call unless invited to. Email is the default. Phone calls can feel intrusive, especially at smaller foundations with limited staff.
- Accept a decline gracefully. A "no" to your LOI is not a "never." Thank them, ask if there's a better-fit program or future cycle, and keep the relationship warm.
What to Do When Invited to Submit a Full Proposal
Congratulations — your LOI worked. Now the real writing begins. Key steps:
- Re-read the invitation carefully. It often includes specific instructions, page limits, or questions they want addressed based on your LOI.
- Don't contradict your LOI. Your full proposal should expand on the LOI, not change direction. If your approach has evolved, acknowledge it.
- Expand the budget. Move from the summary to a full line-item budget with narrative justification.
- Add the evaluation plan. Most LOIs only hint at evaluation. The full proposal needs the complete framework.
- Reference the LOI. A simple mention — "As outlined in our Letter of Intent dated [date]" — creates continuity.
For a comprehensive walkthrough of building the full proposal, our complete grant proposal template guide covers every section.
Keeping track of LOI deadlines, response windows, and invitation timelines across multiple funders is where things get messy fast. GrantCue's deadline tracking includes LOI due dates as a distinct milestone in your grant pipeline — so you never miss the audition for the show you actually want to be in.
Between LOIs and full proposals, foundation funding is a two-step dance. Understanding the differences between foundation processes and federal grant applications helps you adapt your approach for each.
Write the LOI like a movie trailer — enough to hook them, not enough to spoil the ending. Save the full story for the proposal.