The valuable electric vehicle tax credit for new and used EVs is set to end after September. Here’s how these credits work and who qualifies.

Buyers have until Sept. 30 to qualify for the credit now that Congress has passed the spending bill, which ends the program.

It is the end of the line for US electric vehicle tax credits. Sweeping tax and budget legislation approved by Congress on Thursday means $7,500 tax credits for buying or leasing new electric vehicles will end on Sept. 30, as well as a $4,000 used EV credit, that have helped juice green vehicle sales in recent years.