Fixed deposit (FD) is one of the popular investment avenues for senior citizens. For senior citizens comparing FDs, the interest rate is an important factor, but it should not be the only consideration. The FD tenure, premature withdrawal rules and minimum deposit requirements are some of the other key factors that senior citizens should check before investing in FDs. Here we take you through the list of banks offering up to 8.50% interest rate to senior citizens on a five-year FD.