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Real Interest Rate


The real interest rate is the nominal interest rate adjusted for inflation, reflecting the true cost of borrowing or the real return on investments. It is a measure of growth in purchasing power over time. When the real interest rate is positive, your money grows in terms of purchasing power; when it is negative, your purchasing power declines.


The phonetics of “Real Interest Rate” are:Real: /ˈriːəl/ – REE-uhlInterest: /ˈɪn.trəst/ – IN-truhstRate: /reɪt/ – RAYT

Key Takeaways

  1. Real Interest Rate is the rate of return on a loan or investment, adjusted for inflation.
  2. It is considered a more accurate reflection of the true cost of borrowing or the real yield on an investment, as it accounts for changes in purchasing power over time.
  3. Real Interest Rate can be calculated by subtracting the rate of inflation from the nominal interest rate (which is not adjusted for inflation).


The Real Interest Rate is an important concept in business and finance because it represents the true return or cost of borrowing, taking into account the impact of inflation. By adjusting the nominal interest rate for inflation, the real interest rate provides a more accurate measure of the actual purchasing power gained or lost through an investment or loan. This information is crucial for investors, borrowers, and policymakers as it helps them to make informed decisions, compare the attractiveness of different investments, understand the costs associated with borrowing, and analyze the overall health of an economy. In essence, the real interest rate serves as a key indicator in assessing the economic landscape and shaping financial strategies.


The real interest rate serves a crucial role in the financial and economic landscape, as it helps investors, businesses, and individuals make informed decisions by factoring in the actual purchasing power of their borrowed funds or investments. By adjusting nominal interest rates for inflation, real interest rates provide a more accurate representation of the cost of borrowing and the return on investments. This enables everyone to better evaluate the opportunities, risks, and rewards associated with loans, bonds, savings accounts, and other financial activities. The real interest rate can help borrowers comprehend the true cost of taking out a loan and assist lenders in analyzing the real yields of their loans, ensuring effective resource allocation and making well-informed decisions.Additionally, real interest rates are integral to understanding and formulating monetary policies, as they serve as an important analytical tool for central banks and policymakers. Central banks often set real interest rates to promote stable economic growth while keeping inflation in check. Through adjustments of nominal interest rates, they can stimulate or cool down an economy, while taking into account prevailing inflation. Analyzing real interest rates aids the interpretation of various economic indicators and macroeconomic trends such as GDP growth, unemployment, and business cycle dynamics. In summary, real interest rates play a fundamental role in financial markets and economic policymaking, facilitating clear insights into the true cost of money, and helping to maintain a balanced and prosperous economic environment.


1. Mortgage Loans: When you take out a mortgage to buy a house, the real interest rate is a key factor in determining your monthly payments. For example, if the nominal interest rate on your mortgage is 4%, and the annual inflation rate is 2%, the real interest rate would be approximately 2% (4% – 2%). This real interest rate reflects the actual cost of borrowing money, after accounting for changes in the value of money due to inflation.2. Savings Accounts: Banks and other financial institutions offer interest rates on savings accounts as an incentive for individuals to save money. For example, if a bank offers a 2% nominal interest rate on its savings account, and the annual inflation rate is 1.5%, the real interest rate on your savings would be 0.5% (2% – 1.5%). This means that, in real terms, the value of your savings is growing by 0.5% each year, after adjusting for inflation.3. Government Bonds: Government bonds are issued to finance public projects and are considered relatively low-risk investments. The real interest rate on government bonds is important for both investors and governments, as it determines the real cost of borrowing. For example, if a government issues a 10-year bond with a 3% nominal interest rate, and the average annual inflation rate over those 10 years is 2%, the real interest rate on the bond would be 1% (3% – 2%). Investors would use this real interest rate to assess the actual return on their investment, while governments would use it to evaluate the true cost of financing public projects.

Frequently Asked Questions(FAQ)

What is the Real Interest Rate?

The Real Interest Rate is the rate of interest that has been adjusted to remove the effects of inflation, representing the actual growth in the value of the money loaned. It gives a clearer indication of the true cost of borrowing and the real return on an investment.

How is the Real Interest Rate calculated?

The Real Interest Rate can be calculated using the Fisher equation:Real Interest Rate = [(1 + Nominal Interest Rate) / (1 + Inflation Rate)] – 1

What is the difference between the Real Interest Rate and the Nominal Interest Rate?

The Nominal Interest Rate is the unadjusted rate of interest on a loan or an investment, not taking into account inflation. The Real Interest Rate, on the other hand, accounts for the eroding effects of inflation over time, providing a more accurate measure of the true cost of borrowing or real return on an investment.

Why is the Real Interest Rate important?

The Real Interest Rate is critical for both borrowers and investors, as it provides a more accurate measure of the true cost of borrowing and the real return on an investment. It assists in comparing the performance of various financial assets over time and helps in making more informed financial decisions.

How does inflation affect the Real Interest Rate?

Inflation erodes the purchasing power of money over time. When calculating the Real Interest Rate, inflation is factored in to showcase the actual value of money. Higher inflation reduces the Real Interest Rate, making borrowing less expensive and potentially encouraging economic growth, while lower inflation raises the Real Interest Rate and incentivizes saving.

How do central banks use the Real Interest Rate?

Central banks, such as the Federal Reserve in the United States, use the Real Interest Rate as a monetary policy tool by adjusting the target rates to influence borrowing, investing, and saving behaviors, ultimately aiming to achieve economic stability and growth.

Can the Real Interest Rate become negative?

Yes, the Real Interest Rate can be negative when the rate of inflation is higher than the nominal interest rate. Under such circumstances, the purchasing power of money decreases, making borrowing more attractive, while investing and saving become less appealing.

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