What is National Pension System and how does it work?

National Pension Scheme (NPS) is a government-sponsored pension scheme. It was launched in January 2004 for government employees. However, in 2009, it was opened to all sections. The scheme allows subscribers to contribute regularly in a pension account during their working life. On retirement, subscribers can withdraw a part of the corpus in a lumpsum and use the remaining corpus to buy an annuity to secure a regular income after retirement.