WESTVILLE — School officials adopted an $11.5 million spending plan for the upcoming school year on Wednesday that includes about $21,600 in deficit spending, although that may change.

School Superintendent Jim Owens said the budget approved by the board includes funding for a new driver's education car, an estimated 10 percent increase in health insurance costs, and some work to make Westville High School more energy efficient. But it does not include the loss of $314,000 in general state aid that state lawmakers warned may occur.

Owens said he was told the state may not send its last general aid payment in June. Some June state aid payments have been delayed until July in recent years, but this could be a loss of the final payment. A little more than half of the district's $11.5 million in revenue is expected to come from general state aid.

"This is a good budget," Owens said. "We hope the state comes through with the revenues they have promised us, but we have some contingency plans in place if it does not."

For example, the district may hold off on some technology purchases if the final payment is eliminated. Also, the district's financial situation would change if the state comes through with some or all of the $400,000 in late payments it already owes to the district.

The budget is also a little off because of the project at Westville High. The district recently received a $250,000 state grant to improve energy efficiency. The grant is reflected as income for the 2010-11 fiscal year, but the money spent on the work — along with $250,000 in matching district funds — will be shown as expenses in the 2011-12 fiscal year.

With the grant, the district will renovate the HVAC system in the 1982 addition on the north side of Westville High, replace some single-pane windows in that part of the school with more-energy-efficient double-pane ones, and add a vestibule near the entrance to reduce heat loss.