Retirement planning starts with the income you may need, the age you want flexibility, inflation and expected longevity. The National Pension System (NPS) is a regulated retirement-account framework with its own contribution, investment-choice, withdrawal and annuity rules. It should be compared with provident-fund balances, deposits, mutual funds and other assets rather than viewed in isolation. Rules, tax treatment and exit conditions can change, so check current official information before acting.