<P> The poverty threshold, poverty limit or poverty line is the minimum level of income deemed adequate in a particular country . In practice, like the definition of poverty, the official or common understanding of the poverty line is significantly higher in developed countries than in developing countries . In 2008, the World Bank came out with a figure (revised largely due to inflation) of $1.25 a day at 2005 purchasing - power parity (PPP). In October 2015, the World Bank updated the international poverty line to $1.90 a day . The new figure of $1.90 is based on ICP purchasing power parity (PPP) calculations and represents the international equivalent of what $1.90 could buy in the US in 2011 . The new IPL replaces the $1.25 per day figure, which used 2005 data . Most scholars agree that it better reflects today's reality, particularly new price levels in developing countries . The common international poverty line has in the past been roughly $1 a day . At present the percentage of the global population living under extreme poverty is likely to fall below 10% according to the World Bank projections released in 2015 . </P> <P> Determining the poverty line is usually done by finding the total cost of all the essential resources that an average human adult consumes in one year . The largest of these expenses is typically the rent required to live in an apartment, so historically, economists have paid particular attention to the real estate market and housing prices as a strong poverty line affector . Individual factors are often used to account for various circumstances, such as whether one is a parent, elderly, a child, married, etc . The poverty threshold may be adjusted annually . </P>

The calculation of the poverty line is based on