How to Write a Grant Budget for Your Nonprofit

Grant reviewers read your narrative to understand your vision. They read your budget to decide if they trust you to execute it. A sloppy or unrealistic budget, one that underestimates costs, omits indirect expenses, or fails to match the narrative, is one of the most common reasons otherwise strong applications are declined. This guide walks through how to build a grant budget that holds up to scrutiny.

Start With a Complete Project Budget

Before you build the funder-specific budget you will submit, build a complete internal project budget that captures everything the project will actually cost. Include personnel time (even if only partially funded by this grant), materials and supplies, travel, contractor or consultant fees, venue costs, printing and marketing, and any equipment purchases. This full picture is the foundation from which you will build all your grant budgets.

Many applicants start from what they think the funder will fund, not from what the project actually costs. This leads to budgets that omit real costs, which in turn leads to projects that run out of money, require additional fundraising mid-project, or cut corners on delivery.

Personnel: The Biggest Line Item

If any staff time will be devoted to this project, it needs to appear in the budget even if you are not asking the funder to pay for it. Show the full salary or hourly rate, then show what percentage of that person's time will be spent on the project, and calculate the cost. If your development director will spend 10 percent of her time administering this grant, that should appear as an in-kind contribution or match line item. Funders expect to see a realistic accounting of the human resources a project requires.

For positions that will be hired specifically for the project, use current market rates for the role, not what you wish you could pay. In New Mexico, checking salary ranges against comparable nonprofit positions in the same region and sector is a reasonable approach. The New Mexico Association of Nonprofits periodically publishes salary survey data that can anchor your rates.

Direct vs. Indirect Costs

Direct costs are expenses that can be attributed specifically to this project: a part-time coordinator's salary, printing costs for program materials, artist fees for a specific event. Indirect costs, also called overhead or facilities and administrative costs, are organizational expenses that support all your programs: rent, utilities, bookkeeping, executive leadership time. Many funders allow you to include an indirect cost rate, typically 10 to 20 percent of direct costs, to cover these overhead expenses. Some government grants have negotiated indirect cost rate agreements with specific percentages. Check each funder's guidelines before including indirect costs, as some explicitly exclude them.

Matching and Leverage

Many grants require or reward cost sharing, meaning you must demonstrate that other resources will support the project alongside the requested grant. Matching can be cash (other grants, earned revenue, donations) or in-kind (volunteer time, donated space, donated materials). When calculating volunteer value, use the current Independent Sector volunteer rate for New Mexico as a reference point. Present your match clearly in the budget, separating the requested grant amount from matching funds so the total project budget is transparent.

Even when a match is not required, showing leverage strengthens your application. A funder who gives you $10,000 toward a $40,000 project feels their investment is catalytic. A funder giving $10,000 toward a $10,500 project may wonder why you cannot cover the remaining $500 yourself.

Formatting the Budget

Most funders provide a budget template, and you should use it exactly as provided. When you have flexibility in format, use a two-column approach that separates the amount requested from this funder from the full project budget. Label each line item specifically: not just "supplies" but "art materials for 12 workshops: $45 per session x 12 = $540." The math should be transparent and verifiable.

Group line items logically: personnel first, then direct program expenses, then indirect costs or overhead last. Add a budget narrative, a separate document or a column of notes, that explains any non-obvious line items. If you are paying artists $150 per workshop, explain why that rate is appropriate for the market and the level of expertise required.

Budget Narrative

The budget narrative is a prose document, usually a paragraph or two per major section, that explains your methodology, justifies your cost estimates, and describes any in-kind contributions or pending grants. A strong budget narrative tells the reviewer: "We have thought through exactly what this project will cost, we know how we arrived at each number, and we have a realistic plan to cover the full cost." If any line item might raise a question, answer it in the narrative before the reviewer has to ask.

Common Budget Mistakes

Underestimating personnel time is the most common error. Projects always require more staff time than anticipated, especially in planning and reporting phases. Build in a 10 percent contingency buffer, or acknowledge in the narrative that you have allocated overhead resources to cover unexpected costs.

Forgetting reporting and evaluation costs is another frequent omission. If the grant requires a final report, data collection, or an external evaluation, those costs are real and should appear in the budget. A $10,000 grant that requires a $2,000 external evaluation is really an $8,000 grant unless you budget the evaluation in.

Mismatching the narrative and the budget undermines trust. If your narrative describes hiring a part-time community outreach coordinator but your budget has no personnel line item, reviewers will notice. Read both documents side by side before submitting and confirm every activity described in the narrative is reflected in the budget.

After the Award

Once funded, track expenditures against your budget throughout the grant period. Most funders allow budget modifications of 10 to 15 percent between line items without prior approval, but require notification or approval for larger shifts. Keep receipts and documentation for every expense, and make sure any match or in-kind contributions are documented as well. A well-organized grant file will make your final report straightforward and position you well for future applications with the same funder.