What £1,750,000 means for your stamp duty bill
At £1,750,000 the top 12% band applies to everything above £1.5 million. The total SDLT is £123,750, an effective rate of 7.1%. This is the highest band for a standard residential purchase, and there is no cap above it.
At this level stamp duty is often one of the largest single costs of the transaction, comfortably exceeding legal and survey fees combined. If the property includes non-residential land, or you are buying multiple dwellings, different rules may reduce the bill — mixed-use property is charged at commercial rates, which are lower at the top end. That is worth taking specialist advice on.
For context, £1,750,000 is about 503% above the UK average house price of roughly £290,000. Your marginal rate at this price is 12%, meaning that is the rate charged on the next pound you add to the purchase price.