The $496 number: a complete breakdown of what one calendar actually raises

The first thing most people do when they hear the MonthFund model is the math. Day 7 is $7 per donor. Day 22 is $22 per donor. If you fill all 31 days and every donor covers every day — what does that come to?

$496. The sum of all integers from 1 to 31 is 496.

That is the base number. Everything else in MonthFund's math is built on top of it. Understanding where $496 comes from — and what realistically affects it — is the foundation of campaign planning.

Where $496 comes from

The formula is straightforward: the sum of all integers from 1 to n is n(n+1)/2. For a 31-day month: 31 × 32 ÷ 2 = 496. For shorter months:

This is the per-calendar figure — what a single fully filled calendar raises from a single donor who covers every day. In practice, each calendar has multiple donors and each participant works to find as many donors as possible.

The fill rate variable

A fully filled calendar means all 31 days are claimed and each claimed day is fully funded. In practice, most campaigns do not run at 100% fill. Some days go unclaimed. Some participants do not recruit enough donors.

The realistic range for a first campaign is 65–85% fill rate. By the third or fourth campaign, experienced organizations routinely hit 85–95%. Here is what that looks like at different participant counts:

What actually drives fill rate

Fill rate is not random. It is determined by two things: how many days get claimed, and how thoroughly each claimed day gets funded. Both are within the organizer's control.

Days claimed is a recruitment problem. The more engaged participants you recruit before launch, the faster the calendar fills. Organizations that do pre-launch outreach — getting verbal commitments before the campaign goes live — consistently outperform those that send a link and wait.

Day funding is a coaching problem. Participants who understand their ask — and who feel supported — perform better. A brief 15-minute kickoff call explaining exactly what to say to potential donors can move fill rate by 10–15 percentage points.

Neither of these requires extra technology. They require the organizer to treat participant activation as a job, not an afterthought.

Modeling annual revenue

The real leverage in MonthFund is repetition. A campaign that runs every month — even if it only runs at 70% fill — compounds into significant annual revenue for organizations that commit to the rhythm.

The monthly model is not for every organization. But for those with the capacity to run it — and communities with strong enough networks to sustain it — the compounding effect is the most powerful argument for MonthFund as infrastructure rather than a one-time campaign.