The government-backed Post Office Senior Citizen Savings Scheme (SCSS) permits investments up to ₹30 lakh for individuals and ₹60 lakh jointly with a spouse, starting from ₹1,000. It's available to senior citizens aged 60 and above. For example, an investment of ₹30 lakh at an 8.2% interest rate will yield an annual interest of ₹2,46,000, which is approximately ₹20,500 monthly.