Proposition 39 is a ballot initiative in the state of California that modifies the way out-of-state corporations calculate their income tax burdens. The proposition was approved by voters in the November 6 general election, with 61.1% voting in favor of it. The nonpartisan California Legislative Analyst's Office has determined that changing the way out-of-state corporations are taxed in California will generate approximately $1 billion in revenue and create 40,000 jobs.