BASIS OF PROPERTY TAX CALCULATION Calculation of Property TaxFor Triennial Revision of Assessment Previous Annual Rental Value increased by 10% to 25% = Annual Rental Value (ARV) ARV x 23.5% = Property Tax per year 23.5 % is the cumulative tax percentage of House Tax (13.5%) and Water Tax (10%)Monthly Rent x 10 = Annual Rental Value (ARV) (Converting monthly Rent to Annual Value by taking 10 months instead of 12 as common value) ARV x 23.5% = Property Tax per year 23.5 % is the cumulative tax percentage of House Tax (13.5%) and Water Tax (10%)New constructed building (Building Value + Land Value)/20 = Annual Rental Value (ARV) ARV x 23.5% = Property Tax per year 23.5 % is the cumulative tax percentage of House Tax (13.5%) and Water Tax (10%)