As work changes, firm-provided training may become more relevant; however, there is little causal evidence about the effects of training on firms. This paper studies a large training grants programme in Portugal, contrasting successful firms that received the grants and unsuccessful firms that did not. Combining several rich data sets, we compare a large number of potential outcomes of these firms, while following them over long periods of time before and after the grant decision. Our difference-in-differences models estimate significant positive effects on take up (training hours and expenditure), with limited deadweight; and that such additional training led to increased sales, value added, employment, productivity, and exports. These effects tend to be of at least 5% and, in some cases, 10% or more, and are robust in multiple dimensions of the analysis.