Net interest margin of banks in the U.S. 1995-2018

Average net interest margin of banks in the United States from 1995 to 2018

by M. Szmigiera, last edited May 2, 2019
Net interest margin of banks in the U.S. 1995-2018 Net interest margin is a measure of the difference between the interest income generated by banks or other financial institutions and the amount of interest paid out to their lenders relative to the amount of their (interest-earning) assets. It is similar to the gross margin of non-financial companies. In 2018, the average net interest margin of the U.S. banks amounted to 3.30 percent.
Why do banks charge and pay interest?

When a bank accepts a deposit, it pays an interest rate to the depositor as payment for that deposit. This is because the bank will then use that money to issue loans. The loans also have an interest rate, for two reasons. First, the bank wants to generate profit. Second, the bank knows that loans have risk of default. If a borrower does not repay the bank, the loan is considered non-performing. This is costly for the bank, since some or all of the loan value is lost.

Interest rate drivers

In addition to changes in the federal funds rate, expectations of inflation affect interest rates, particularly of longer loan maturities such as mortgages. Similarly, having a lower credit score signals that a borrower carries a higher default risk. Banks charge these borrowers higher interest rates to account for that risk.
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Average net interest margin of banks in the United States from 1995 to 2018

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Net interest margin
20183.3%
20173.14%
20163.03%
20152.98%
20143.1%
20133.2%
20123.41%
20113.55%
20103.76%
20093.36%
20083.27%
20073.35%
20063.45%
20053.56%
20043.62%
20033.75%
20024.07%
20013.85%
20003.93%
19994.04%
19984.04%
19974.3%
19964.3%
19954.23%
Net interest margin
20183.3%
20173.14%
20163.03%
20152.98%
20143.1%
20133.2%
20123.41%
20113.55%
20103.76%
20093.36%
20083.27%
20073.35%
20063.45%
20053.56%
20043.62%
20033.75%
20024.07%
20013.85%
20003.93%
19994.04%
19984.04%
19974.3%
19964.3%
19954.23%
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by M. Szmigiera, last edited May 2, 2019
Net interest margin is a measure of the difference between the interest income generated by banks or other financial institutions and the amount of interest paid out to their lenders relative to the amount of their (interest-earning) assets. It is similar to the gross margin of non-financial companies. In 2018, the average net interest margin of the U.S. banks amounted to 3.30 percent.
Why do banks charge and pay interest?

When a bank accepts a deposit, it pays an interest rate to the depositor as payment for that deposit. This is because the bank will then use that money to issue loans. The loans also have an interest rate, for two reasons. First, the bank wants to generate profit. Second, the bank knows that loans have risk of default. If a borrower does not repay the bank, the loan is considered non-performing. This is costly for the bank, since some or all of the loan value is lost.

Interest rate drivers

In addition to changes in the federal funds rate, expectations of inflation affect interest rates, particularly of longer loan maturities such as mortgages. Similarly, having a lower credit score signals that a borrower carries a higher default risk. Banks charge these borrowers higher interest rates to account for that risk.
Show more
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