More than nine out of 10 households are already watching digital TV.
If you haven't already gone digital you may need a UHF aerial and set-top box or a satellite dish and satellite set-top box.
The equipment you need to watch Freeview digital TV is sold through retailers.
If you wish to watch Sky or Igloo, the company you choose will provide the equipment.
The cost of going digital will depend on your location and what equipment you need, but it's best to talk to your retailer or an installer about your options.
Instead of buying anything, you may choose to subscribe to a pay-TV service like Sky or Igloo.
Those companies will install the equipment you need to watch digital TV in return for a monthly fee.
Your local retailer can provide further information and advice.
For more information about going digital call 0800838800 or visit www.goingdigital.co.nz