What percent of the principal is earned or paid per year?

The percentage of the principal that is earned or paid per year depends on the interest rate associated with the investment or loan. For example, if an investment has an interest rate of 5%, then 5% of the principal is earned annually. Similarly, if a loan has a 6% interest rate, 6% of the principal is paid as interest each year. The specific percentage can vary widely based on the financial product and market conditions.