http://www.rms.nsw.gov.au/roads/registr ... costs.html
Light vehicles (up to 4.5 tonnes Gross Vehicle Mass) attract motor vehicle tax based on the tare (unladen) weight of the vehicle. The more it weighs, the higher the vehicle tax. In addition, vehicles used for business purposes attract a higher vehicle tax than those for private use.
Private use up to 975kg is $207 and 976-1154kg is $240. The tare weight listed for my NC is 1100kg so it's firmly in the second bracket. I then got curious about my ND, and checked the tare weight and it is 985kg ... tantalisingly only 10kg over the first bracket. So close to saving $33 per year on rego!

I seem to recall the tare weight for the NA6 was listed at around 955kg which means cheaper rego (although CTP is a killer). Can someone confirm?