Capital Campaign Planning Calculator
Plan a capital campaign with gift table tiers, lead gift sizing, prospect counts, and monthly fundraising targets.
About this calculator
This planner sketches a fundraising gift table for a multi-year capital campaign using the classic pyramid model major-gift officers rely on: a small number of very large gifts do most of the work, with a broad base of smaller gifts filling in the rest. The lead gift target is a straight percentage of the overall goal (commonly 10-25%), and the top-10-gifts percentage is a separate benchmark showing what your ten largest gifts, on average, should represent — a widely cited rule of thumb is that the top 10 gifts account for roughly 60% of a campaign's total. The actual donor pyramid, though, is built from a fixed four-tier structure scaled off the lead gift rather than the top-10 percentage directly: one lead gift, three gifts at half the lead amount, eight gifts at 10% of the lead, and twenty gifts at 2% of the lead. Whatever remains of the campaign goal after those 32 major and mid-level gifts is assumed to come from a broad base of average $500 gifts, and dividing that remainder by $500 gives the broad-base donor count.
Total donors needed sums every tier, and total prospects needed multiplies that by 3.5 — a standard fundraising ratio reflecting that not every prospect you cultivate ultimately gives. Monthly target simply divides the goal by campaign length in months for a pacing benchmark. Because the tier structure is fixed rather than driven by your top-10 percentage input, that field mainly recalibrates the displayed average top-10 gift rather than reshaping the donor pyramid itself.
Inputs
Results
Lead Gift Target
$1,250,000.00
≈ 3 average U.S. homes
Total Donors Needed
782
How to Use This Calculator
- Enter Campaign Goal ($), Lead Gift (% of Goal), and Top 10 Gifts (% of Goal).
- Set Campaign Length (months).
- Review Lead Gift Target ($) and Total Donors Needed.
- Use Prospects Needed and Monthly Target ($) to inform your decision.
- Use the chart to visualize the results and explore different scenarios by adjusting inputs.
How the result changes with Campaign Goal ($)
| Campaign Goal ($) | Lead Gift Target | Total Donors Needed |
|---|---|---|
| $2,500,000.00 | $625,000.00 | 407 |
| $3,750,000.00 | $937,500.00 | 595 |
| $7,500,000.00 | $1,875,000.00 | 1,157 |
| $12,500,000.00 | $3,125,000.00 | 1,907 |
What each input means
- Campaign Goal ($)
- Total amount to raise during the campaign
- Lead Gift (% of Goal)
- Largest single gift as % of goal (typically 10-25%)
- Top 10 Gifts (% of Goal)
- Percentage of goal from top 10 gifts (typically 50-70%)
- Campaign Length (months)
- Total campaign duration including quiet and public phases
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersCampaign Goal ($) = 5000000, Lead Gift (% of Goal) = 25, Top 10 Gifts (% of Goal) = 60, Campaign Length (months) = 36 = 4 input(s) provided
- Calculate Lead Gift TargetLead Gift Target1250000 = $1,250,000
- Calculate Total Donors NeededTotal Donors Needed782 = 782
- Calculate Prospects NeededProspects Needed2737 = 2737
- Calculate Monthly TargetMonthly Target138889 = $138,889
Engine last updated . Checked against 2 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
Does raising the Top 10 Gifts percentage actually change the size of the gift tiers below the lead gift?
No — the donor pyramid is built from a fixed structure scaled entirely off the lead gift: one lead gift, three gifts at 50% of the lead, eight gifts at 10% of the lead, and twenty gifts at 2% of the lead. The Top 10 Gifts input only recalculates the displayed Avg Top-10 Gift benchmark; it doesn't reshape how the actual tier amounts or donor counts are computed.
Where do the specific gift counts — 1, 3, 8, and 20 donors per tier — come from?
They're a fixed pyramid structure hardcoded into the calculator, reflecting a common major-gift fundraising pattern: a single top gift, followed by rapidly increasing numbers of donors at progressively smaller gift sizes (half, then a tenth, then 2% of the lead gift). This structure isn't derived from your specific inputs beyond the lead gift amount, so it won't adapt to campaigns with an unusually flat or unusually top-heavy real donor base.
How is Broad Base Donors calculated, and what if the top tiers already exceed my campaign goal?
It takes whatever remains of the Campaign Goal after the four major-gift tiers are subtracted, then divides that remainder by an assumed average gift of $500, rounding up. If your Lead Gift or Top 10 percentages are set high enough that the top tiers alone meet or exceed the goal, remainingAmount is floored at zero and Broad Base Donors comes out to zero as well.
Why does Prospects Needed come out to more than the Total Donors figure?
It multiplies Total Donors Needed by 3.5, a standard fundraising ratio reflecting that not every prospect a campaign cultivates ultimately makes a gift — historically, campaigns need to identify and steward several qualified prospects for every gift they actually secure. This gives your development team a realistic sense of how large a prospect pool to build, not just how many gifts are needed.
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