Budget History FY/01 - Present
| Fiscal Year | Budget | Change | Notes |
| FY/24 | $2,864,581 | 0% | |
| FY/23 | $2,864,581 | 2.5% | No changes in membership. |
| FY/22 | $2,794,714 | 3.25% | No changes in membership. |
| FY/21 | $2,706,745 | 5.01% | Bolton & Grafton join. |
| FY/20 | $2,577,745 | 3.40% | No changes in membership. |
| FY/19 | $2,492,984 | 9.90% | Worcester joins. |
| FY/18 | $2,266,843 | 4.40% | No changes in membership. |
| FY/17 | $2,171,306 | 4.40% | No changes in membership. |
| FY/16 | $2,079,795 | 2.15% | Gardner joins. |
| FY/15 | $1,986,933 | 1.93% | No changes in membership. |
| FY/14 | $1,949,203 | 3.75% | Lowell joins, Uxbridge withdraws. |
| FY/13 | $1,801,893 | 7.78% | Boylston joins. |
| FY/12 | $1,671,893 | 0.00% | No changes in membership. |
| FY/11 | $1,671,893 | -0.31% | Devens joins. |
| FY/10 | $1,677,131 | -0.20% | No changes in membership. |
| FY/09 | $1,679,946 | 2.44% | Boylston withdraws. |
| FY/08 | $1,638,972 | 10.07% | Boylston, Lancaster & Uxbridge join. |
| FY/07 | $1,473,888 | 4.34% | No changes in membership. |
| FY/06 | $1,409,942 | 8.65% | No changes in membership. |
| FY/05 | $1,287,990 | 0% | No changes in membership. |
| FY/04 | $1,287,990 | 5.60% | Webster joins. |
| FY/03 | $1,215,805 | 14.99% | Sturbridge joins. |
| FY/02 | $1,033,558 | 14.19% | Acton, Auburn, Hopkinton, Millville & Northbridge join. |
| FY/01 | $886,932 | No changes in membership. |
NOTE: When a city or town joins, our budget will increase by the percentage noted above, but all other community's assessment (proportionate share) will not reflect that full percentage amount because the new city/town's assessment offsets the final budget amount.
Assessments are also affected by changes in the equalized evaluations (EQV), part of the assessment formula administered by the Department of Revenue. The EQV is updated every 2 years.