For 2016-17 NHS spending was 145 billion which is 6.5% of GDP of about 2.2 trillion. Private health spending is thought to be a little above 1% of GDP or about 26 billion, giving total health expenditure of 7.5 - 8% of GDP, but adding in social care for international comparison, total health expenditure by international definition is about 9.9% of GDP. For comparison Germany, France, Sweden and Japan spend about 11% of (a larger per capita) GDP.