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((refimprove|date=January 2017))
The '''potential support ratio''' ('''PSR''') is the number of people age 15–64 per one older person aged 65 or older.  This ratio describes the burden placed on the [[working population]] ([[unemployment]] and children are not considered in this measure) by the non-working elderly population.<ref name="name">World Population Ageing 1950-2050, p 41 [https://www.un.org/esa/population/publications/worldageing19502050/pdf/95annexi.pdf Definition of the Indicators of Population Ageing]</ref>

As a population ages, the potential support ratio tends to fall. Between 1950 and 2009, the potential ratio declined from 12 to 9 potential workers per person aged 65 or over. By 2050, the potential support ratio is projected to drop further to reach 4 potential worker per older person. The reduction of potential support ratio has important implications for social security schemes, particularly for pay-as-you-go pension systems under which taxes on current workers pay the pensions of retirees.

In 2015, Japan has the lowest PSR in the world, at 1.8.<ref>[https://population.un.org/wpp/Publications/Files/WPP2019_DataBooklet.pdf World Population Prospects], page 7.</ref>

==See also==
*[[Dependency ratio]]

==References==
((reflist))

((DEFAULTSORT:Potential Support Ratio))
[[Category:Ageing]]

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