Revenues and profits are rising for New Zealand Post.

The state owned enterprise's half year report shows it recorded an after tax profit of $100 million, up from $71 million the previous year.

According to the numbers, Kiwibank contributed $71 million to the result, a 36% increase on the previous six months.

Overall NZPost's revenue, at $879 million, was up almost $20 million from a year earlier - a growth in the company's parcel business is identified as a factor in the result.

Its profits might be up, but NZPost is warning cost cutting remains on its business agenda.

The result comes as the company's trimming staff and moving to reduce its mail delivery days.

NZPost says while substantial costs are being removed from its business, cost reduction will necessarily be a continued focus.