2016 Washington Initiative 732

Washington Initiative 732 (I-732) was a ballot initiative in 2016 to levy a carbon tax in the State of Washington, and simultaneously reduce the state sales tax. It was rejected 59.3% to 40.7%. The measure appeared on the November 2016 ballot. The backers of I-732 submitted roughly 350,000 signatures in December 2015 to certify the initiative.

The initiative was spearheaded by environmental economist Yoram Bauman, a strong advocate of carbon pricing. It was modeled after the British Columbia carbon tax, which was considered "popular across the political spectrum". The carbon tax in British Columbia caused the province's fuel consumption to decrease by 16% and its greenhouse gas emissions to decrease 3.5 times faster than the emissions of Canada as a whole, while maintaining steady economic growth.