When it comes to funding the Old Rochester Regional School district, it pays to be the biggest loser.

Rochester Town Administrator Richard LaCamera informed Selectmen on Monday night the town’s education bill dropped by $91,000.

The total bill, known as the minimum contribution, is assessed for all three towns in the district. It is based on a formula tied to the state budget.

While Rochester saw a drop, Marion and Mattapoisett saw increases of $14,000 and $82,000 respectively. Uncertainty on which state budget proposal would be approved prompted administrators to create contingency plans that included possible staff cuts and transferring money from the “excess and deficiency” account, which has extra revenue generated year-to-year.

In total, Rochester will be contributing $4.4 million to ORR and $752,000 to Old Colony Regional Vocational Technical High School, located in Rochester.

Before the new contributions were released, LaCamera expressed his concerns at a joint tri-town meeting held earlier this summer. Even though the assessment benefited Rochester, he said action was needed to avoid unexpected changes in the future.

Between ORR and Old Colony, the school assessment accounts for anywhere from 65 to 75 percent of the municipal budget.

“A swing either way has an effect on our budget,” LaCamera told Selectmen. “We can’t continue to function this way.”

Next month, a meeting between school and municipal officials, and school committee members from across the tri-towns, will be held to address the issue.