Late Tuesday night, the state Senate approved the bill, which gives schools a rebate of 50 percent off the state sales tax. For a $100,000 bus, that could be $3,000.
The House approved a similar version on Friday.
The incentive is a response to a school bus crash in Hartford that killed a teenager.
On Jan. 9, Rocky Hill student Vikas Parikh, 16, died when the school bus he was riding in plunged down an embankment on Interstate 84. His family has testified before the state Legislature, pleading with lawmakers to pass a law requiring seat belts on all school buses.