There are various investment avenues available through which one may accumulate retirement corpus to avail pensions. However, there are three options which are directly linked to build the corpus \u2013 Public Provident Fund (PPF), Employees' Provident Fund (EPF) and National Pension System (NPS). While PPF is a purely voluntary scheme, EPF is mandatory for private sector employees, subject to fulfillment of certain conditions, and NPS is compulsory for government employees. Public Provident Fund (PPF) Any earning individual may open an PPF account for self and\/or his\/her minor child and can make total contribution (taking together all the accounts) of Rs 1,50,000 in a financial year, which is revised by the government from time to time. The government also fixes the interest rate on PPF, which is currently 8 per cent per annum. Employees' Provident Fund (EPF) Employees' Provident Fund is applicable to an organisation having 20 or more employees. The contribution to EPF is managed by the Employees' Provident Fund Organisation (EPFO) and entails employees benefits of Provident Fund (PF), Employees' Pension Scheme (EPS) and Employees' Deposit-Linked Insurance (EDLI). The interest rates on EPF are decided by the EPFO and is currently fixed at 8.55 per cent per annum. National Pension System (NPS) National Pension System or NPS (earlier New Pension Scheme) was created by an Act of Parliament to provide pension to government employees, who joined services on or after January 1, 2004 and was opened later for general public. Under the NPS, individual savings are pooled in to a pension fund which are managed by Pension Fund Regulatory and Development Authority (PFRDA) regulated professional fund managers and investments are made as per the approved investment guidelines in to the diversified portfolios comprising of government bonds, bills, corporate debentures and shares. At present, there are eight pension fund managers (PFMs), out of which SBI Pension Funds Pvt Ltd (SBIPF), LIC Pension Fund Ltd (LICPF) and UTI Retirement Solutions Ltd (UTIRS) belong to public sector and are oldest fund managers. The private sector PFMs are HDFC Pension Management Co Ltd (HDFCPM), ICICI Prudential Pension Fund Management Co Ltd (ICICIPF), Kotak Mahindra Pension Fund Ltd (KotakMPC), Reliance Capital Pension Fund Ltd (RcapPF) and Birla Sun Life Pension Management Ltd (BSLPM), of which BSLPM is the youngest PFM, which has started managing pension funds only from May 2017. There are two types of NPS accounts \u2013 Tier-I is for retirement purpose and matures when the contributor retires at the age of 60, while there is no such restriction or withdrawal in Tier-II accounts. However, to claim 80C benefits, one has to keep money invested in the Tier-II account for at least three years. On the other hand, voluntary contributions to Tier-I accounts entail a contributor tax deductions u\/s 80CCD up to Rs 50,000 in a financial year. Apart from choice of accounts, there are three investment choices are also available to corporate or individual contributors. The choices are \u2013 Asset Class E, in which investments are made predominantly in equity market instrument; Asset Class C, in which investments are made predominantly in fixed income instruments other than Government Securities and Asset Class G, in which investments are made predominantly in Government Securities. However, at present, there is only one default scheme for Tier I for Government employees, for which, the contribution is allocated to three pension fund managers (PFM), namely SBI Pension Funds Private Limited, UTI Retirement Solutions Limited and LIC Pension Fund Limited in a predefined proportion. Following tables show the periodic compound annual growth rate (CAGR) generated by PFMs under various options. As Birla Sun Life Pension Management Ltd (BSLPM) is yet to complete two years of operations, the PFM is not included in the tables as 1-year performance is too short to predict long-term returns needed to generate retirement corpus. So, according to above tables, the return for 5 years or more on any NPS scheme is higher than the fixed interest rates on PPF and EPF.