Do I need to tip in New Zealand?

Tipping is not customary or expected in New Zealand however if the service or experience you encountered was exceptional and you wish to reward someone for a job well done a small gratuity would be welcomed.There are no set amounts or percentages, its usually a case of 'have a couple of beers on us' calculation. Many bars, cafes and restaurants have a tip jar at the counter  and it is common to put any loose change from your transaction in here when you order at a counter. Any kind of recognition is very much appreciated.