What type of income can someone earn from a savings account at a commercial bank?

When an individual deposits money into a savings account at a commercial bank, they earn income in the form of interest. This interest is a payment made by the bank to the account holder for the use of their funds. It is calculated as a percentage of the balance in the savings account and is typically credited monthly or quarterly.

Interest is a fundamental concept in personal finance, serving as a passive income source that rewards individuals for saving money. It is different from capital gains, which are profits from the sale of an asset, such as stocks or real estate, and rely on market fluctuations rather than the stability of a bank. Commission income, on the other hand, is earned through sales or services rendered and is not related to savings accounts. Diversified income refers to earning from multiple sources, which may or may not include interest from savings but is not the primary focus in this context.

In summary, the correct answer is interest because it specifically pertains to the income generated from maintaining a savings account at a commercial bank.