Basic and minimum pensions along with social assistance are defined as the first layer of protection for the elderly within the pension system. They make up the first tier of the taxonomy of pension systems, which was set out in the previous indicator of the architecture of national pension schemes.
Basic pensions only exist in two non-OECD economies compared to five of the OECD countries listed. Five Asian economies provide a social assistance benefit equivalent to 8.1% of average earnings. Furthermore, five economies provide a minimum pension benefit, most often above the basic or social assistance level. For a full-career worker, the average minimum pension is 24.5% of average earnings.