The two-movie project has suffered several delays, including funding woes from MGM, first-choice director Guillermo del Toro quitting and producer Peter Jackson taking over, a threatened actors' boycott, and surgery for Jackson.
Funding for The Hobbit became a political football last year after actors threatened to strike and Warner Bros countered by threatening to film the movie elsewhere.
Prime Minister John Key stepped in to broker a deal with Warner Bros US executives who flew into New Zealand, giving them an extra subsidy of $9.75 million per movie for spending more than $200 million, expanding what spending qualifies for the rebate under the existing rules, and changing employment law to classify all film workers as contractors by default.
The government would also stump up US$10 million to market local tourism as part of The Hobbit's release.
Last week, Jackson announced Wellington will host the world premiere of the first Hobbit film when Prime Minister Key dropped into the set as part of his election campaign. The same day the opposition promised to repeal the changes to employment law passed for the production.
In December last year, Jackson's Weta Digital was awarded $7.2 million over three years under the government's Technology Development Grant Programme. Weta will be a major contributor to the digital special effects for the two movies, having previously worked on blockbusters including James Cameron's Avatar and Jackson's Lord of the Rings trilogy.