The House Finance Committee passed the measure on a 10-3 vote Friday morning, and the bill now heads to the House Appropriations Committee for consideration late Friday afternoon.
The extended tax breaks are valued at about $9 billion, according to state estimates.
State Rep. Cary Condotta of Wenatchee was one of those who voted for the measure - but with some reservations.
"We've made very little progress for the small businesses, but in 24 hours Boeing can snap their fingers and get a concession," he told KOMO Newsradio. "I have some problems with that."
Gov. Jay Inslee called lawmakers back to Olympia this week for a special session dedicated to the Boeing proposals. Inslee also has called for a $10 billion transportation revenue package to pass as part of the overall plan, but Senate leadership has indicated that it wants to take that up at a later time.