Warning Sign #8: Ratio of Plant Costs to Revenue
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For a charter school, facility costs are a massive, typically fixed commitment. To maintain financial health, plant (facility) costs should generally fall between 15% and should not exceed 25% of total revenues.
Where a school sits within this 15% to 25% range can vary based on several factors, including geographic location, negotiated interest rates, construction costs, and the specific terms of a lease agreement.
What is Included in "Plant Costs"?
When calculating this ratio, boards need to look at the total cost of keeping the physical infrastructure running. This includes:
Rent payments or debt service (principal and interest).
Maintenance and repairs.
Depreciation expenses.
Why This Ratio is a "Clue" for the Board
Because facility expenses are largely fixed, they do not automatically shrink if your student body does. Monitoring plant costs as a percentage of revenue serves as a helpful clue regarding unused capacity and student headcounts.
If your student enrollment drops, your revenue drops—but your facility costs stay exactly the same. Suddenly, a facility that felt affordable takes up a dangerously high percentage of your operating dollar, leaving less money for the classroom.
Board Action Item: If facility costs begin exceeding a reasonable ratio to revenue, the board must treat this as an immediate warning sign. Trustees should look into strategies to level out infrastructure costs or aggressively focus on increasing student headcounts to bring the ratio back into a sustainable balance.
Your building should support your educational mission, not swallow your entire budget. Keeping your plant-to-revenue ratio under the 25% ceiling ensures that your facility remains an asset rather than a financial anchor.
But even if you keep a tight lid on rent and utilities, the biggest cash drain on any school happens inside the classroom. To see if your staffing model is sustainable, we have to look at Warning Sign #7: Ratio of Payroll to Revenue.
See all 10 warning signs: https://www.chartersagecpa.com/warning-signs
This series is based on the CharterSage CPA guide: "10 Financial Warning Signs Florida Charter Boards Should Watch."
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