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Extreme poverty

Condition characterized by severe deprivation of basic human needs

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A graph showing the amount of people in and not in extreme poverty over time.
Unknown author Unknown author · CC BY-SA 4.0

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Extreme poverty mainly refers to an income below the international poverty line of $3 per day in 2025 ($2.99 in 2025 dollars), set by the World Bank. This is the equivalent of $1.00 a day in 1985 US prices, hence the widely used expression "living on less than a dollar a day". The vast majority of those in extreme poverty reside in Sub-Saharan Africa. As of 2026, it is estimated that the country with the most people living in extreme poverty is the DRC, at 76.2 million.

In the past, the vast majority of the world population lived in conditions of extreme poverty. The percentage of the global population living in absolute poverty fell from over 80% in 1800 to around 10% by 2025. According to UN estimates, in 2025 roughly 831 million people or 10% remained under those conditions. In 2000, there had been 2.23 billion people in extreme poverty. Despite the significant number of individuals still below the international poverty line, these figures represent significant progress for the international community, as they reflect a decrease of more than one billion people over 25 years.

The reduction of extreme poverty and hunger was the first Millennium Development Goal (MDG1), as set by the United Nations in 2000. Specifically, the target was to reduce the extreme poverty rate by half by 2015, a goal that was met five years ahead of schedule. In the Sustainable Development Goal 1, which succeeded the MDGs, the goal is to end extreme poverty in all its forms everywhere. With this declaration the international community, including the UN and the World Bank have adopted the target of ending extreme poverty by 2030.

Definition

Previous definitions

In July 1993, Leandro Despouy, the then UN Special Raporters on extreme poverty and human rights made use of a definition he adapted from a 1987 report to the French Economic and Social Council by Fr. Joseph Wresinski, founder of the International Movement ATD Fourth World, distinguishing "lack of basic security" (poverty) and "chronic poverty" (extreme poverty), linking the eradication of extreme poverty by allowing people currently experiencing it a real opportunity to exercise all their human rights:

The lack of basic security connotes the absence of one or more factors enabling individuals and families to assume basic responsibilities and to enjoy fundamental rights. The situation may become widespread and result in more serious and permanent consequences. The lack of basic security leads to chronic poverty when it simultaneously affects several aspects of people's lives, when it is prolonged and when it severely compromises people's chances of regaining their rights and of reassuming their responsibilities in the foreseeable future.

This definition was mentioned previously, in June 1989, in the preliminary report on the realization of economic, social and cultural rights by the UN Special Rapporteur Danilo Türk. It is still in use today, among others, in the current UN Guiding Principles on Extreme Poverty and Human Rights adopted by the UN Human Rights Council in September 2012.

Consumption-based definition

Extreme poverty is defined by the international community as living below $3.00 a day, as measured in 2021 international prices (equivalent to $3.69 in 2026). This number, also known as the international poverty line, is periodically updated to account for inflation and differences in the cost of living; it was originally defined at $1.00 a day in 1996. The updates are made according to new price data to portray the costs of basic food, health services, clothing, and shelter around the world as accurately as possible. The latest revision was made in 2025 when the World Bank increased the line to international-$3.00.

Because many of the world's poorest people do not have a monetary income, the poverty measurement is based on the monetary value of a person's consumption. Otherwise the poverty measurement would be missing the home production of subsistence farmers that consume largely their own production.

Alternative definitions

The $3/day extreme poverty line remains the most widely used metric as it highlights the reality of those in the most severe conditions. Although widely used by most international organizations, it has come under scrutiny due to a variety of factors. For example, it does not account for how far below the line people are, referred to as the depth of poverty. For this purpose, the same institutions publish data on the poverty gap.

The international poverty line is designed to stay constant over time, to allow comparisons between different years. It is therefore a measure of absolute poverty and is not measuring relative poverty. It is also not designed to capture how people view their own financial situation (known as the socially subjective poverty line). Moreover, the calculation of the poverty line relies on information about consumer prices to calculate purchasing power parity, which are very hard to measure and are necessarily debatable. As with all other metrics, there may also be missing data from the poorest and most fragile countries.

Several alternative instruments for measuring extreme poverty have been suggested which incorporate other factors such as malnutrition and lack of access to a basic education. The Multidimensional Poverty Index (MPI), based on the Alkire–Foster Method, is published by the Oxford Poverty & Human Development Initiative (OPHI): it measures deprivation in basic needs and can be broken down to reflect both the incidence and the intensity of poverty. For example, under conventional measures, in both Chad and Guinea-Bissau about 40% of the population is considered extremely poor, but based on the MPI, 84% of Chadians and 64% of Bissau-Guineans are in multidimensional poverty.

The MPI is useful for development officials to determine the most likely causes of poverty within a region, using the M0 measure of the method (which is calculated by multiplying the fraction of people in poverty by the fraction of dimensions they are deprived in). For example, in the Gaza Strip of Palestine, using the M0 measure of the Alkire–Foster method reveals that poverty in the region is primarily caused by a lack of access to electricity, lack of access to drinking water, and widespread overcrowding. In contrast, data from the Chhukha District of Bhutan reveals that income is a much larger contributor to poverty as opposed to other dimensions within the region. However, the MPI only presents data from 105 countries, so it cannot be used for global measurements.

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