How to build a grant budget and budget justification

The budget is the part of a proposal many grant writers dread, and the part many reviewers read first. That is not a coincidence. A budget shows, in a form that cannot be dressed up, whether you have thought the project through. If the narrative promises weekly tutoring for 40 students and the budget has no line for tutors, the reviewer knows something is wrong before reading another word.

Think of the budget as your program plan translated into dollars. Every activity in your narrative should have a cost somewhere in the budget, and every cost in the budget should trace back to an activity. If you get that relationship right, the numbers become much less intimidating.

You can build along with this guide in our grant budget builder, and use the budget justification template to write the narrative.

Start with the program, not the spreadsheet

Before you open a spreadsheet, list what the project will actually do and what each activity requires. Walk through a typical week and a full project year:

• Who is doing the work, and how many hours?
• Where does it happen, and who pays for the space?
• What do participants need: materials, transportation, food, stipends?
• What has to be bought, rented, or contracted out?
• What travel is required, local or otherwise?
• How will you evaluate results, and who will do it?
• What organizational support (finance, HR, IT, leadership) keeps it running?

That last question is where indirect costs come from, and it is the one most often skipped. We cover it fully in our indirect costs guide.

Bring your finance person in at this stage, not the night before the deadline. They know your real salary figures, fringe rate, insurance costs, and how your accounting system tracks expenses. A budget your finance team cannot actually track is a budget you will struggle to report on.

The standard budget categories

Most funders, and every federal agency using the SF-424A form, organize costs into similar categories. Learn these once and you can adapt to almost any funder's template.

Personnel

Salaries and wages for your own employees who work on the project. For each position, show:

• Title (and name, if the person is on staff)
• Annual salary or hourly rate
• Percent of time (FTE) or number of hours on this project
• Number of months
• The resulting cost

The formula is simple: annual salary x percent of time x (months / 12). For hourly staff: hourly rate x hours per week x number of weeks.

Personnel is usually the largest category in a service nonprofit's budget, and that is fine. Funders know programs are delivered by people. What they look for is consistency: the percent of time in the budget should match the role described in your narrative and your staffing plan.

Fringe benefits

Fringe covers employer-paid costs on top of salary: employer payroll taxes (FICA), unemployment insurance, workers' compensation, health and dental insurance, retirement contributions, and similar benefits.

Most organizations express fringe as a percentage of salary, calculated from actual costs. Your finance team can compute it: total annual employer-paid benefits and payroll taxes divided by total annual salaries. Many nonprofits have two rates, one for full-time benefited staff and a lower one for part-time staff who receive only the legally required items.

Show the rate and the base it applies to. "Fringe at 25% of full-time salaries" is clear. A lump sum with no explanation invites questions.

Travel

Travel includes transportation, lodging, meals, and related costs for staff. Separate local travel (mileage to program sites, home visits) from out-of-town travel (conferences, trainings). For each trip, show who is going, where, why, and the cost calculation.

Use your organization's written travel policy for mileage and per diem rates. For federal awards, travel costs must be consistent with your established written policy under 2 CFR 200.475, and if you have no written travel policy, the federal government's own travel rates apply by default. Either way, write the policy down before you budget around it.

Equipment

In federal terms, equipment means tangible property with a useful life of more than one year and a per-unit cost at or above the lesser of your organization's capitalization threshold or $10,000. The 2024 Uniform Guidance revisions raised that federal ceiling from $5,000 to $10,000.

That means most items small nonprofits think of as equipment (laptops, tablets, printers, furniture) are actually supplies for federal budgeting purposes, unless your own capitalization policy sets a lower threshold. Foundations usually do not care about the distinction as long as you are consistent, but follow their template if it defines equipment.

For anything that does qualify as equipment, describe it, give the unit cost and quantity, and explain why the project needs it and why buying is better than renting or using existing equipment.

Supplies

Consumable items and lower-cost items that fall below your equipment threshold: program materials, curricula, books, office supplies used directly for the project, computers below the threshold, and participant materials. Group small items logically and give the calculation, such as "40 students x $50 per student for workbooks, art supplies, and incentives."

Contractual

Payments to outside parties for services: an external evaluator, a consultant, a trainer, a translation service, a bus company. Show the scope of work, the rate, and the basis for the cost (hourly rate x hours, a fixed-price quote, a rate from a prior contract).

For federal awards, distinguish between contractors (vendors who provide goods or services to you) and subrecipients (partners who carry out part of the program on your behalf). The distinction matters for compliance and for indirect cost calculations. See subawards and pass-through funding.

Construction

The SF-424A includes a construction line, but it applies only to programs that specifically allow construction. Most program grants do not. If you are not sure, the answer is almost certainly zero.

Other

The catch-all for direct costs that do not fit elsewhere: participant stipends or incentives, rent for project-specific space, printing, background checks, event costs, software subscriptions dedicated to the project, insurance specific to the project. Itemize. A large "Other" line with no detail is a red flag to reviewers.

Indirect costs

Indirect costs (also called overhead, administrative costs, or facilities and administrative costs) are the shared organizational costs that support every program but cannot be easily assigned to one: executive leadership, finance, HR, IT, general insurance, the main office. They are calculated as a rate applied to a base.

Federal awards use either your federally negotiated indirect cost rate or, if you don't have a current negotiated rate, a de minimis rate of up to 15 percent of modified total direct costs (MTDC) under 2 CFR 200.414(f). Foundations each have their own policy. Our indirect costs guide explains how to calculate and request them, and our indirect cost calculator does the math.

The revenue side: who else is paying

A strong budget shows not only what the project costs, but how the full cost will be covered. Many funders want a project budget with both expenses and revenue, especially when they are funding only part of the work.

Revenue sources to show:

• This request
• Other grants, marked committed or pending
• Government contracts or grants
• Earned revenue (fees, contracts for service)
• Individual donations and events allocated to the project
• Organizational funds (unrestricted money you are dedicating)
• In-kind contributions

Mark each source as committed, pending, or projected. Funders understand that not everything is secured at the time you apply. What they want is a believable plan. If you show a pending source, be ready to explain what happens if it falls through.

In-kind contributions

In-kind contributions are donated goods or services: free space, donated equipment, pro bono legal or accounting help, volunteer time. They represent real value to the project and belong in the budget, typically as both an expense and a matching revenue line, or in a separate in-kind column.

Value in-kind contributions conservatively and document them:

• Space: the fair rental value of comparable space, or the donor's documented rate
• Professional services: the provider's normal billing rate for that service
• Volunteer time: a reasonable rate for the work being done; for federal awards, volunteer services must be valued at rates consistent with what you pay for similar work, or, if you do not employ people with those skills, what similar work pays in your local labor market (2 CFR 200.306(e))
• Goods: fair market value at the time of donation

Get a letter from the donor stating what they are contributing and its value. You will need that documentation later for your records and, for federal awards, for audit.

Match and cost share

Some funders require you to contribute a share of the project cost, called matching or cost sharing. A one-to-one match on a $50,000 grant means you must document $50,000 in other resources for the project. Match can usually be cash, in-kind, or a combination, but read the requirements carefully. Some programs require cash match, set limits on in-kind, or specify what sources qualify.

For federal awards, cost sharing has specific rules under 2 CFR 200.306. To count, contributions must be verifiable in your records, not counted toward any other federal award, necessary and reasonable for the project, allowable under the cost principles, not paid by the federal government under another award (unless a statute allows it), and included in the approved budget when the agency requires it. For federal research grants, voluntary committed cost sharing is not expected, and agencies may not use it as a review factor unless a statute or regulation authorizes it and the NOFO says so.

A worked example

Here is a complete one-year project budget for a fictional organization. The numbers are illustrative; use your own actual salaries, rates, and quotes.

Expense budget

Revenue budget

Notice a few things about this example:

• Every line shows the formula. A reviewer can recompute any number.
• The two staff named in the capacity section appear here at the same percent of time.
• The in-kind space is valued with a stated rate and backed by a commitment letter.
• Indirect is applied at the funder's stated maximum and calculated transparently.
• The revenue side adds up to exactly the expense side.
• The request ($120,000) is about 62 percent of the project's cash cost, and the remaining sources are labeled honestly.

If this foundation required you to show which lines its grant covers, you could add a column splitting each line between "this request" and "other sources." Some funders prefer that format; follow their template.

Writing the budget justification

The budget justification (or budget narrative) explains each line in words. It is where you show reviewers that every cost is reasonable, necessary, and connected to the program. Federal reviewers read it closely. Foundation program officers use it to answer the questions their own board or finance staff will ask.

A good justification entry has three parts:

1. What it is. The item, position, or service.
2. How you calculated it. The formula and the source of each number.
3. Why the project needs it. The link to a specific activity or objective.

Organize the justification by the same categories and in the same order as the budget table. Use the same line names. A reviewer should be able to hold the two side by side.

Sample justification language

The following entries match the worked example. Adapt the structure to your project.

That last entry does something worth copying: it tells the funder your actual rate and that you are absorbing the difference. That is honest, and it quietly educates the funder about the real cost of your work.

Foundation budgets vs. federal budgets

The categories overlap, but federal budgets come with far more rules. Here is how they compare.

The SF-424A also asks for non-federal resources (Section C), forecasted cash needs by quarter (Section D), and federal funds needed for future years of the project (Section E). Fill these out carefully. They must agree with your detailed budget and justification.

Federal allowability in brief

Under 2 CFR 200.403, a cost charged to a federal award generally must be necessary and reasonable for the award, allocable to it, consistent with your policies for other activities, treated consistently as direct or indirect, adequately documented, and in line with any limits in the award terms. If you cannot explain how a cost meets those tests, leave it out.

Some costs need special treatment. Participant support costs (stipends, travel, or registration fees paid to or on behalf of participants, not employees) are excluded from the MTDC base for indirect cost purposes, and under 2 CFR 200.308 moving participant support funds to other budget categories requires prior approval. Food can be allowable or unallowable depending on the purpose and the program's rules; check the NOFO and agency guidance. Our Uniform Guidance overview covers the essentials, and our guide to reading a NOFO shows where program-specific limits hide.

Common budget errors and how to avoid them

These are the mistakes reviewers see most often, roughly in order of how much damage they do.

1. Math errors. Totals that do not add up, percentages that do not compute, a request on the cover page that differs from the budget. Build the budget in a spreadsheet with formulas, then have someone else check it.
2. Narrative and budget do not match. Staff mentioned in the narrative with no budget line, budget lines for activities never described, or different FTEs in different places.
3. Unexplained lump sums. "Program costs: $25,000." Every line needs a calculation.
4. Padding. Inflated estimates are easy to spot when reviewers know typical costs. Padding damages your credibility on every other line.
5. Under-budgeting. Leaving out real costs, especially indirect, evaluation, and staff time, to keep the request small. You will either fail to deliver or subsidize the grant from funds you do not have.
6. Ignoring the funder's rules. Asking for costs the funder excludes (capital, endowment, food, travel), exceeding their indirect limit, or using the wrong template.
7. Unrealistic revenue. Listing pending grants as committed or projecting event revenue far above your history.
8. In-kind without documentation. Donated space or volunteer time valued at an unexplained or inflated rate.
9. Wrong categories on federal forms. Laptops in equipment, subrecipients in contractual without explanation, indirect applied to the wrong base.
10. Rounding inconsistencies. Different totals in the SF-424A, the justification, and the narrative because each was rounded differently. Round once, at the line level, and carry the same numbers everywhere.

Multi-year budgets

For multi-year projects, show each year separately and a cumulative total. Account for:

• Cost-of-living or merit increases for staff, at a rate consistent with your actual practice
• Changing activities: startup costs in year one, scale-up in year two, sustainability planning in year three
• One-time costs that should not repeat
• Declining requests if the funder expects you to build other support over time

If a funder expects their share to decrease over the grant period, your revenue side should show other sources growing to fill the gap. Our sustainability plan guide covers how to make that credible.

After you submit

Keep your budget workpapers: the spreadsheet with formulas, salary documentation, vendor quotes, in-kind valuation letters, and your fringe and indirect calculations. If the grant is awarded, those documents become the baseline for tracking spending and writing financial reports. If the funder offers less than you asked, they let you revise the budget and scope quickly and honestly rather than just cutting lines at random.

When a funder awards less than requested, do not simply shrink every line by the same percentage. Revisit the program: what can you realistically deliver at the lower amount? Present a revised scope and budget to the program officer. Funders respect that far more than a promise to do the same work for less money.

For how the budget fits the rest of your proposal, see the anatomy of a grant proposal, and for managing the money once it arrives, see post-award compliance.