The company's mail and logistics business increase profit 29 per cent to $31 million as revenue rose 1.7 per cent to $425 million. Increased ecommerce activity pushed parcel deliveries to a record, offsetting a decline in letters.
Meanwhile the Kiwibank unit, which accounts for the bulk of earnings, increased profit 37 per cent to $71 million as revenue rose 23 per cent to $283 million.
Kiwibank benefited from improved net interest margin and cost containment, Roche said.
The bank's net interest income, which measures its interest expense against its interest income, increased to $179 million in the period, from $140 million a year earlier, it said.
NZ Post will pay a $2.5 million dividend to the government on March 31, unchanged from the year earlier period.
In the first half, the SOE wrote down the value of its investment in business service provider Coverga Pty by $23 million to $26 million after the business lost a major customer. It recognised a one-time gain of $47 million from the sale of its Couriers Please business to Singapore Post .