Grant Writer Cost Calculator
Estimate the cost of hiring a grant writer (hourly, flat fee, or retainer) and calculate ROI based on expected win rates and award amounts.
About this calculator
This calculator compares the economics of hiring a grant writer under three common pricing structures — hourly (rate times estimated hours per proposal), flat per-project fee, and monthly retainer averaged across the proposals it covers — and turns whichever one you pick into an annual cost and a cost per proposal. It then models the return: expected wins are your annual proposal volume times your expected win rate, and expected annual revenue is those wins times your average request amount, both simple expected-value calculations rather than guarantees. ROI compares that expected revenue against what you're paying the writer, and cost-per-dollar-raised (the writer's total cost divided by expected revenue) gives a single efficiency figure — the tool notes that under $0.20 is generally considered excellent for a fundraising cost ratio.
Break-even win rate answers a different, useful question: given your writer cost, proposal volume, and average award size, what win rate would you need just to cover the writer's fee, independent of what you actually expect to achieve. One important framing baked into the industry notes here: this tool only prices flat, time-based, or retainer arrangements — it deliberately does not support commission or contingency fees (a percentage of the award), because charging a cut of grant funds is considered an ethics violation by both the Association of Fundraising Professionals and the Grant Professionals Association, not just an unusual pricing choice.
Inputs
Results
Annual Writer Cost
$30,600.00
Cost per Proposal
$5,100.00
How to Use This Calculator
- Enter the Grant Writer's Hourly Rate and expected Hours Per Application.
- Enter the Success Rate percentage and average Grant Size for your portfolio.
- Enter the Number of Applications to submit in the year.
- Review Cost Per Application and Total Annual Grant Writing Investment.
- Check Cost Per Dollar Raised to evaluate the efficiency of your grant writing program.
How the result changes with Hourly Rate ($)
| Hourly Rate ($) | Annual Writer Cost | Cost per Proposal |
|---|---|---|
| 43 | $15,480.00 | $2,580.00 |
| 64 | $23,040.00 | $3,840.00 |
| 128 | $46,080.00 | $7,680.00 |
| 213 | $76,680.00 | $12,780.00 |
What each input means
- Pricing Model
- How the grant writer charges for their services.
- Hourly Rate ($)
- Grant writer's hourly rate (used if pricing model = 1). Typical: $50-$150.
- Hours per Proposal
- Estimated hours per proposal (used if pricing model = 1).
- Flat Fee per Proposal ($)
- Fixed price per proposal (used if pricing model = 2). Typical: $2K-$15K.
- Monthly Retainer ($)
- Monthly retainer fee (used if pricing model = 3). Typical: $2K-$8K.
- Retainer Months
- Number of months the retainer covers.
- Proposals per Year
- Number of grant proposals submitted annually.
- Avg. Request Amount ($)
- Average dollar amount requested per proposal.
- Expected Win Rate (%)
- Percentage of proposals expected to be funded. Industry avg ~20-30%.
What each result means
- Annual Writer Cost
- Total cost of the grant writer for the year.
- Cost per Proposal
- Average cost per proposal submission.
- Expected Annual Revenue
- Expected grant revenue based on submissions and win rate.
- Net Return
- Expected revenue minus writer cost.
- ROI (%)
- Return on investment for grant writing services.
- Expected Wins
- Expected number of successful proposals per year.
- Cost per Dollar Raised
- Writer cost divided by expected revenue. Below $0.20 is excellent.
- Break-Even Win Rate (%)
- Minimum win rate needed for the writer to pay for themselves.
- Expected Value per Proposal
- Statistical expected revenue per proposal submitted.
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersPricing Model (1-3) = 1, Hourly Rate ($) = 85, Hours per Proposal = 60, Flat Fee per Proposal ($) = 5000 = 9 input(s) provided
- Calculate Annual Writer CostAnnual Writer Cost30600 = $30,600
- Calculate Cost per ProposalCost per Proposal5100 = $5,100
- Calculate Expected Annual RevenueExpected Annual Revenue = expectedWins * avgRequestAmount112500 = $112,500
- Calculate Net ReturnNet Return = expectedAnnualRevenue - annualWriterCost81900 = $81,900
Engine last updated . Checked against 3 independently-derived tests — how we verify calculators. Built by Paul Gunder, a software engineer, not a licensed financial, medical, or legal professional.
Frequently Asked Questions
How does the monthly retainer model convert into a cost per proposal?
Annual writer cost under the retainer model is simply your monthly retainer times the number of retainer months you enter. Cost per proposal then divides that annual total by your proposals-per-year figure, so it's an average, not a per-project fee — if your proposal volume changes, the effective cost per proposal shifts even though the retainer itself didn't.
What does the break-even win rate tell me that ROI doesn't?
ROI compares your actual expected win rate's revenue against writer cost, but break-even win rate answers a different question: what win rate, given your proposal volume, average award size, and writer cost, would be needed just to cover the writer's fee with zero net gain. If your expected win rate is close to or below the break-even rate, the writer isn't likely to pay for themselves even before accounting for the nonprofit's mission value of the work.
Why doesn't this calculator support commission-based grant writer fees?
The calculator only models hourly, flat per-project, and monthly retainer pricing, deliberately excluding contingency or commission fees (a percentage of the award). That's not an arbitrary limitation — the Association of Fundraising Professionals and the Grant Professionals Association both consider charging a cut of grant funds an ethics violation for fundraising professionals, so it's excluded rather than just unsupported.
Is cost per dollar raised the same thing as ROI?
No, they're two different framings of the same underlying numbers. ROI expresses net return (expected revenue minus writer cost) as a percentage of writer cost, so a higher ROI is better. Cost per dollar raised instead divides writer cost by expected revenue directly, giving a small decimal figure — the calculator notes that under $0.20 is generally considered an excellent fundraising cost ratio for this metric.
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