KEYSTONE MONTESSORI CHARTER SCHOOL

The organization over time

Each line starts at 100 in 2017, so what you read is the shape rather than the size: 150 means half as much again as 2017, 50 means half. The number beside each label in the key is where it ended. The shaded band is where the middle 50% of its peers' revenue would sit, given their growth.

How it's funded, over time

Each bar is one year's revenue split into where it came from, and every bar is the same height — these are shares, not amounts, so a year that raised twice as much looks the same size. Hover a bar for the split.

Government-grant reliance: 2017 50% · 2018 49% · 2019 52% · 2020 58% · 2021 55% · 2022 61% · 2023 63% · 2024 55% · 2025 47%. Grants only. Government contracts and fees sit inside program revenue.

Surplus & reserves

Operating surplus or deficit each year, and months of liquidity in hand. 2 of the last 9 reported years ran a deficit.

Who funds it, year by year

2017 → 2023: the base broadened from 2 funders to 5 funders, grant income rose $11k → $66k.

3 of 7 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 98% of grant dollars received. That money is really individual donors directing a sponsor; the institutions to cultivate are the non-DAF funders.

From the IRS filings of KEYSTONE MONTESSORI CHARTER SCHOOL’s funders (the co-funder graph). Association, not causation. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.

How concentrated its funding is

KEYSTONE MONTESSORI CHARTER SCHOOL leans on a few funders — its largest provides 74% of grant income and the top three 99%; half comes from just 1 funder.

98% of the income these shares are computed over arrives through pass-through sponsors or from payers whose filings do not say what kind of payment it is. Concentration is still measured over all of it, because the money is real; what it does not support is a claim about how many institutions have chosen to fund KEYSTONE MONTESSORI CHARTER SCHOOL.

Largest funder’s share by year: 2017 69% · 2018 89% · 2019 82% · 2020 94% · 2021 84% · 2022 77% · 2023 83% — growing more concentrated.

“Effective funders” = inverse Herfindahl index (1 / Σ shareᵢ²) — the number of equal-sized funders that would give the same concentration. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.

Where its funders are

98% of KEYSTONE MONTESSORI CHARTER SCHOOL's grant income arrives through donor-advised or pass-through sponsors, whose addresses record where the money is held rather than where the donor is. Of the $7k that is directly attributable, 100% of it comes from funders outside Arizona, across 4 states.

Funder states come from each funder’s own filing. $314k arriving through sponsors registered in 3 states is excluded from the map and the split above: a sponsor holds money on a donor’s behalf, so its registered address would place those dollars somewhere no donor need ever have been. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.