WASHINGTON — Fairfax County Public School teachers have been promised a 2 percent pay raise, but in order for the raise to come through, county supervisors say the commonwealth must pay its share of the teacher pay raise.

A full-year 2 percent pay raise for teachers would cost $40 million. But Fairfax County Supervisor Jeff McKay says the state’s portion of the raise — about $4.4. million — is in jeopardy because it has been tied to state revenue projections, which have not met their mark.

“There’s major financial implications here if this funding does not make its way through to the county for teacher pay,” Fairfax County Supervisor Jeff McKay told the board, which voted unanimously to send a letter to Gov. Terry McAuliffe.

The letter expresses hope that “efforts to manage revenues and resources will allow the Commonwealth to provide the anticipated funding for salary increases for teachers and state-supported local employees throughout the state.”

While the Virginia economy continues to struggle more than eight years following the start of the national recession, the county supervisors have told the governor that Fairfax County faces similar challenges and local revenues have been stretched making it tough for the county to provide the salary hikes.