The old-age support ratio relates to the number of people who are capable of providing economic support to the number of older people who may be dependent on others' support.

It is computed as the ratio of the
working-age population (e.g. aged
20-64 years) per person aged 65 years
and over in Singapore.

Over the past decades, the old-age support
ratio of the resident population (comprising
Singapore citizens and permanent
residents) has steadily decreased.

Factors contributing to this downward trend include rising life expectancy and falling birth rates.