Public Provident Fund and National Savings Certificate are two of the very secured saving instruments. The NSC is a savings scheme established by the post-office while the PPF was generated by the central government in 1968. But both are very safe since they are supported by the government. What is the Contribution? The minimum amount one must contribute towards their PPF account in a year is Rs 500. The maximum one can put is Rs"Public Provident Fund (PPF) Vs National Savings Certificate(NSC) Comparison"