Stamp duty revenue is highly concentrated on sales of expensive properties, something that could present a risk, according to a report by the Office for Budget Responsibility on risks to the economy.
There are risks from the concentration of tax receipts among a small number of taxpayers, the OBR said. Some 14% of all stamp duty revenue in 2015-16 came from the sale of 9,250 homes in Kensington & Chelsea and Westminster.
The OBR expects stamp duty revenue to rise to £17bn by 2021-22, from £11.6bn in 2016-17.
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