UAW Demands Would Add $80 Billion to US Carmaker Labor Costs

New contract demands made by the United Auto Workers union would add more than $80 billion to each of the biggest US automakers’ labor costs, according to people familiar with the companies’ estimates.

That large an increase to labor costs over the contract’s four-year term could wipe out profits and threaten the carmakers’ futures, according to the people, who asked not to be named because the analysis has not been made public.