Hi, I am trying to calculate total land tax that I have to pay for my situation: I and spouse jointly own 4 lands (50% each) - value 400k each. total 400*4 = 1600k As we are joint owner there will be only one threshold used for calculating land tax. So as per current threshold in nsw: Assessment for joint owners(Primary) Mr A + Mrs B (all 4 properties): Total land tax payable on 4 lands (land value $1600,000) = $17,988 ((1600k - 482k) *1.6 % +100) A’s 50% share = $800,000 Assessment for A as secondary tax payer: Total land value of A’s interests = $800k Land tax payable on total land value of $800,000 before deduction = $5,188 Now let's calculate deduction (to prevent double taxation): Calculation 1: ($800,000 divided by $1600,000) multiply by $17,988 = $8,994. Calculation 2: ($800,000 divided by $800,000) multiply by $5188 = $5188 A's allowable deduction is $5188 (lesser of calc1 & calc2), so his total land tax payable will be: $5188 minus $5188 = $0. Hence, in this structure A+B jointly pay $17,988 towards land tax. Second structure: Had we purchased lands individually, that is 2 lands each: Then A's land tax would be ($800k - 482k ) * 1.6 % +100 = $5,188 Same calculation for B, land tax = $5,188 So, in this structure total land tax paid by A & B is 5,188*2 = $10,376 As you can see there is a massive difference of $7,612. We have to pay $7,612 more per year just because we made a mistake by owning properties jointly. Can someone please verify if above calculation is correct and I am not missing anything? I understand there are several other disadvantages of joint ownership, but let consider only land tax for now.