Stamp duty rates are calculated on the property purchase price. Stamp duty rates are different for residential and commercial property. Current Stamp Duty Rates: Band Residential CommercialUnder £125k 0% 3%*£125k to £250k 2% 5%£250k to £925k 5% 8%£925k to £1.5m 10% 13%Over £1.5m 12% 15%* An additional property purchased for less than £40k will attract 0% tax. For purchases from £40k to £125k the rate will be 3%.