The National Social Security and Insurance Trust (NASSIT) was established through an Act of Parliament and is charged with the responsibility of administering the Sierra Leone Pension Scheme. NASSIT started full operations in January 2002 as a defined benefits pay-as-you-go pension system. Membership is compulsory for all workers in the public and private sector and optional for self-employed persons and workers in the informal sector.

The National Social Security and insurance Trust (NASSIT) was established through Parliamentary Act No. 5 of 2001 and charged with the responsibility of administering the Sierra Leone Pension Scheme. The scheme started operations in January 2002 as a mandatory contributory defined benefit Pension Plan. As at December 2010, NASSIT had 161,000 active Members (Contributors) and operates a payroll of over 12,000 Pensioners. By end of December 2014, membership of the Scheme grew to 165,000 and the number of Pensioners grew to 14,500.

The National Social Security and Insurance Trust (NASSIT) was established through an Act of Parliament and is charged with the responsibility of administering the Sierra Leone Pension Scheme. NASSIT started full operations in January 2002 as a partially funded defined benefit pension plan which requires a member to contribute for at least 180 months on/before they retire at age 60 to qualify for full retirement pension.