Fiscal drag is the tendency of revenue from taxation to rise as a share of GDP in a growing economy. Tax allowances, progressive tax rates and the threshold above which a particular rate of tax applies usually remain constant or are changed only gradually. By contrast, when the economy grows, income, spending and corporate profit rise. So the tax-take increases too, without any need for government action. This helps slow the rate of increase in demand, reducing the pace of growth, making it less likely to result in higher inflation. Thus fiscal drag is an automatic stabilizer, as it acts naturally to keep demand stable.