The HDFC Bank RD rate of interest differs based on the investor’s age, investment tenure, RBI policies and economic conditions in the country. The RD rates of HDFC Bank are higher than their saving account rates. One can estimate the returns from their HDFC Bank RD investment using the HDFC Bank recurring deposit calculator. For senior citizens, the RD rates range between 5% to 7.75% p.a. HDFC Bank RD rates range between 4.5% to 7.00% p.a. The bank has a tenure of 6 months to 10 years, and the interest rates vary with the tenure. HDFC Bank RDs are investments that allow investors to save small amounts regularly.