At the regular board meeting on Tuesday, March 17, 2026, the the Troy School District (TSD) will present its five-year enrollment projections. These forecasts are more than just numbers; they are the fundamental blueprint for the district’s financial health, which is why I included Stabilize Enrollment as the first pillar of my S.M.A.R.T. strategic plan.

The Power of The Count: Per Pupil Funding

In Michigan, student enrollment is the primary driver of school funding. For the 2025-26 school year, TSD receives a foundation allowance of $10,836 per student. This is composed of the $10,050 state base plus $786 generated by TSD’s local hold-harmless millage.

A significant portion of TSD’s operating revenues come from the multiplication of this $10,836 allowance by the “state aid membership,” which is a weighted average of the Fall 2025 (90%) and Spring 2025 (10%) student counts. For 2025-26, this membership is approximately 12,079 students, according to TSD’s 2025-2026 State Aid Financial Status Report.

Beyond the foundation allowance, the district receives categorical grants. These are additional funds awarded based on the number of students meeting specific criteria, such as those qualifying for Special Education or At-Risk services. Unlike the foundation allowance, which provides unrestricted revenue for general operations, categorical grants are restricted, meaning they can only be used for state-mandated purposes and specific allowable expenses. Ultimately, declining enrollment reduces these other forms of revenue.

The “Aging City” Effect: From District to Neighborhoods

While the city of Troy’s total population is projected to grow slightly through 2030, the “student population centers” are shifting as different neighborhoods age at different rates.

• Shifting Demographics: Since 2010, the share of Troy’s population aged 65 and over has increased significantly, while the population under age 18 has shrunk.
• School-Level Variation: As neighborhoods transition from young families to empty-nesters, the district must continue to maintain buildings in older areas. This creates a “fixed cost penalty” where the district pays to maintain infrastructure that no longer aligns geographically with where students live.

The Replacement Gap

TSD is currently facing a “funding cliff” known as the Replacement Gap. This year’s Kindergarten class is approximately 30% smaller than last year’s 12th-grade class. Because these smaller classes are spread across 12 different elementary schools, the district cannot easily consolidate costs. Over time, these smaller cohorts will continue to accumulate and drive the projected decline in districtwide enrollment. TSD can continue to leverage incoming school-of-choice students to strategically mitigate enrollment challenges at each school. However, this strategy does not address the root causes of the problem (e.g., recruitment of young families to TSD).

The Math of Scale: Fixed vs. Variable Costs

Enrollment levels drive both revenue and expenses, but a decline in enrollment poses a unique challenge: costs do not decrease as quickly as revenue. This is the nature of the types of costs that make up a majority of TSD’s expenses:

• Variable Costs: A small portion of expenses, such as classroom materials, are linearly scalable (i.e., they can be easily adjusted based on the exact number of students).
• Quasi-Variable Costs: Most costs scale in “steps” rather than lines. For example, if a 3rd-grade classroom is at the capacity set by the TEA contract, the district cannot hire “1/29th” of a teacher to accommodate one extra student. Conversely, losing one student does not allow the district to reduce teacher salary costs.
• Fixed Costs: Many expenses remain constant regardless of enrollment. Building maintenance, utilities, and insurance costs remain the same whether a school is at 100% or 80% capacity.

The Budgetary Challenge of Non-Variable Costs

A balanced budget requires that total costs equal total revenues. While a decline in enrollment results in an immediate, linear reduction in revenues, costs cannot be easily reduced at the same rate. Furthermore, most of TSD’s budget is personnel-related (salaries, benefits, and retirement). Because most building-level staff (e.g., teachers) are quasi-variable and many others (e.g., principals and central office staff) represent fixed costs, the district cannot simply “scale down” its workforce in direct proportion to a student count decline. Managing this gap between linear revenue loss and non-linear costs is the central challenge of the upcoming budgets.

Summary

Ultimately, these enrollment projections serve as a vital early warning system for the district’s long-term fiscal health. Because school funding in Michigan is a game of “linear revenue versus non-linear costs,” a shrinking student body creates structural pressures that cannot be solved by small, incremental adjustments. As the “Replacement Gap” persists and the city’s demographics continue to shift, the district must proactively align its fixed infrastructure and quasi-variable staffing levels with this new reality. Understanding these trends now allows the Board and the community to make informed, strategic decisions that protect the quality of a Troy education while ensuring the district remains on a sustainable and balanced financial path.