More than 50 countries worldwide face the risk of a pension crisis as the number of people over the age of 65 is set to exceed that of the young by 2030.
New independent research by Joseph Chamie suggests by 2030 there will be a total of 56 countries who have more old people than young - 26 additional countries from the present.
New Zealand is also among the 56 countries, as is Britain, the United States, Australian, Thailand, Cuba and Albania - just a few countries anticipating a crisis.
As of June last year the ageing population of New Zealand had nearly doubled in 2013 since 1981, according to Statistics NZ.
The 2013 Census recorded 607,032 residents aged 65 years and older, forecasting that number to more than double again by 2038 to 1,285,800.