經濟一問－豪宅印花稅

If everything remains unchanged, an increase in stamp duty will increase the cost of the buyer for the flat. Hence, a decrease or slope down of the demand curve. Stamp duty is to be shared between the buyer and seller in equally.

As spoken, an increase in tax will trigger a downturn of demand unless the buyer thinks the additional cost is immaterial relative to the cost of purchase. In this scenario, there will be no change in supply and demand. However, if the seller think the additional stamp duty will keep the buyer away, he will then lower the selling price. If this will be of a medium term of impact to the property market, more sellers will come and thus an increase or slope up of the supply curve assuming there is no change in demand.