The shares rose 1.8 percent to $2.33 and have gained 0.9 percent this year.
The company also agreed to invest A$100 million in the Australian Social Infrastructure Partnership, with the first A$12 million made post March 31.
The company's 66 percent-owned Wellington International Airport provided the second-largest earnings contribution at $86 million, up from $83 million in 2013 on gains in aeronautical and passenger services income.
Earnings at Infratil Energy Australia Group (IEA) fell to A$61 million from A$80 million and the decline was inflated by the effect of translating earnings back into a strong kiwi dollar. Infratil said today it has started a review of the Lumo and Direct Connect Australia units of IEA that may take six months and will determine whether the businesses are kept as is or sold.
NZ Bus, which operates the bus services in Auckland and Wellington, posted a 9 percent drop in earnings to $40 million, coming in below budget, which Infratil said reflected disappointing passenger growth and engineering costs to comply with new regulations.
Earnings for 2015 would be "between 6 percent and 12 percent higher than this year's $500 million," the company said.
"Next year it is expected that New Zealand's economy will continue to drive demand for transport and energy and that there will be increasing private provision of infrastructure on both sides of the Tasman," the company said.
Infratil will pay a final dividend of 7 cents a share, up from 6 cents a year earlier and bringing annual payments to 10.75 cents.