The Fieldays 2016 Economic Impact Report was released at Mystery Creek Events Centre, showing the annual event generated $430 million in sales revenue for New Zealand firms.
Almost $125 million of that came straight into the Waikato.
The impact to GDP was calculated at $58 million for the Waikato and $191 million for all of New Zealand.
The report was prepared independently by consulting economist Dr Warren Hughes and the University of Waikato Management School's Institute of Business Research.
NZ National Fieldays Society CEO Peter Nation said he was happy with the report, which served as a real validator of the Fieldays event.
More than 1100 exhibitors attended the 2016 event, which ran from June 15 to 18.
Fieldays is now an international show, welcoming not only local companies but those from Australia, the UK and elsewhere.
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