What £160,000 means for your stamp duty bill
At £160,000 only two bands come into play. The first £125,000 is taxed at 0%, and everything above that is taxed at 2%. Nothing reaches the 5% band, which starts at £250,001, so your bill stays modest relative to the purchase price — an effective rate of 0.4%.
This is the cheapest part of the SDLT curve for a standard purchase. Each additional £10,000 you spend at this level adds only £200 in tax. That changes once you cross £250,000, where the marginal rate jumps from 2% to 5%.
For context, £160,000 is about 45% below the UK average house price of roughly £290,000. Your marginal rate at this price is 2%, meaning that is the rate charged on the next pound you add to the purchase price.