Foxconn chief Terry Gou did not give a figure for the costs, but the group has been spending heavily to fight a perception its vast plants in China are sweatshops with poor conditions for its million-strong labor force. It regards the criticism as unfair.
"We've discovered that this (improving factory conditions) is not a cost. It is a competitive strength," Gou told reporters on Thursday after the ground-breaking ceremony for a new China headquarters in Shanghai.
"I believe Apple sees this as a competitive strength along with us, and so we will split the initial costs."
It was unclear if the split would be 50/50 or in some other ratio.
Foxconn announced in mid-February it had raised wages for workers by 16 to 25 percent, and in late March it reached an agreement with Apple to hire tens of thousands of new workers to reduce overtime work.
Analysts have attributed weaker-than-expected first-quarter results at Foxconn's flagship listed unit Hon Hai Precision Industry Co Ltd mainly to rising salary costs.
Hon Hai has been trying to cut rising Chinese labor costs in the past two or three years, and has been relocating plants to areas of China where wages are lower.
FOCUS ON DOMESTIC CONSUMERS
Foxconn's manufacturing in China will focus on domestic consumers in the country of 1.3 billion people, as well as research and development in technology, sales and services, Gou said.
Foxconn Technology Group's other listed units include Foxconn International Holdings, the world's top contract mobile phone maker, and Foxconn Technology Co which makes casings.
Over the past two years, there has been a spate of suicides at Foxconn's sprawling plants which make the Apple products as well as gadgets for the likes of Microsoft and Nintendo.
Apple and Foxconn agreed earlier this year to improve conditions for workers assembling Apple products.
Despite Hon Hai's weak first-quarter showing, Gou said he expected the group to be able to reach its revenue growth target of 10 percent this year.
(Additional reporting by David Lin; Editing by Muralikumar Anantharaman)
By John Ruwitch