BINGHAM — Residents of School Administrative District 13 in Bingham and Moscow will take up the proposed $3.1 million budget for the coming year at 7 tonight in the Quimby Middle School gymnasium.

Local spending is up about $49,000 compared to the current budget, but the effect on the two towns will be felt elsewhere in the budget, School Superintendent Virginia Rebar said Tuesday.

Residents of Bingham will be asked to contribute $133,754 more in local taxes than this year, while Moscow residents will be asked to come up with $121,118 more than in the current year, Rebar said. The effect on the towns’ tax rates will not be known until the school spending figures, if approved tonight, are added to municipal spending, she said.

The increase in the local contribution is the result of a combination of factors, she said. There are unanticipated increases in unemployment, worker’s compenstion and retirement costs, coupled with less money from tuition from neighboring communities and more out-of-district special education costs.

“This is the year of the perfect storm in our budget,” Rebar said. “We have a lot of nondiscretionary increased costs for everything from teacher raises to copy machines to increased retirement benefits.”

Federal funding no longer covers the district’s social worker, and the cost of the technology repair budget is up because the district is fixing, not replacing, computer equipment.

Rebar said the state subsidy of $894,611 is down in the proposed budget by just $821 from the current year, but combined with the drop in state aid last year of $167,000, the effects will be felt this year.

“We have a combination of things, even though we’ve made huge decreases across the board in any and every place we could possibly find funding to cut,” Rebar said. “We did that reluctantly, but it still remains difficult to maintain our situation here without these increases.”

Several education technician positions have been cut from the budget, as has a $2,000 stipend for the athletic director and hours for food service employees have been reduced. Stipends also were cut for coaches in track, middle school and varsity cross country and middle school baseball. A foreign-language teaching position at the high school will be cut to half time if the budget is approved, as will a high school special education teaching position.

She said the state-required amount for spending under the Essential Programs and Service Act is slightly more than $2 million. To run the district at the level that school officials and school board members think it should be run, an additional $1.55 million will be needed “In order to keep going,” she said.

If the budget for 2012-13 is approved by residents tonight, another vote — the budget validation referendum — will be held in each town June 12.