The cost of sending a letter within New Zealand or internationally will change on July 1 2019.

NZ Post says postal rate changes will contribute to protecting mail as a valued service for all New Zealanders.

'We're making some changes to our products and services so we can continue to provide New Zealand with a viable and future fit mail delivery service,” says a spokesperson for the organisation.

'NZ Post delivers more than 400 million mail items a year, but the number of letters sent continues to drop at a significant rate.

'We're working hard to keep the cost of posting mail as low as possible, by significantly reducing our network costs and making big changes to how we operate.

'However, with an annual decline of approximately 60 million mail items through our network, we also need to increase the price of postage.”

To see those changes and for more information, click here: