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File photo / NZ Herald. The cost of postage is set to rise in July, New Zealand Post says. The standard letter rate, which is the cost of sending a medium-sized letter by standard post in New Zealand, is set to increase from 70 cents to 80 cents.Sending larger letters would also cost more, increasing from $1.40 to $1.60.epending on the size of the parcel and whether it was self-wrapped or in a New Zealand Post postage bag, people would be paying between 10 cents and $1 more. Meanwhile, premium letter services, which is Fast Post and Box Link, would not change in cost, New Zealand Post said.
How Much Does A Post Card Stamp Cost. As of January 22, 2017 the price for sending a post card remains at $0.34. The same amount effective April 10, 2016 when the rate for sending dropped to $0.34, from $0.35. The January `017 date is the same as for other rate announcements, including that for certain postage stamp prices. The `016 thirty-five cent rate mentioned was actually an uptick for postcards that occurred May 31st, 2015, amounting to a one cent hike at the time.