What Is a Benchmark Interest Rate?

A benchmark interest rate is a widely recognized interest rate used as a reference point for setting or comparing other interest rates. It helps determine how much borrowers pay to borrow money and how much lenders or investors expect to earn.

Benchmark rates influence many parts of the financial system, including mortgages, business loans, credit cards, savings accounts, bonds, and other financial products. Understanding them can make it easier to understand why borrowing costs and savings rates change over time.

How Does a Benchmark Interest Rate Work?

A benchmark interest rate acts as a starting point for financial institutions when determining interest rates.

For example, suppose a bank offers a loan at a benchmark rate plus an additional percentage to compensate for the borrower's credit risk and other costs. If the benchmark is 4% and the lender adds 2%, the loan's interest rate could be 6%.

In simple terms:

Loan interest rate = benchmark rate + lender's additional margin

The margin can vary depending on factors such as creditworthiness, loan term, collateral, market conditions, and the type of financial product.

When the benchmark rate changes, interest rates on products linked to it may also change.

Why Are Benchmark Rates Important?

Benchmark rates provide a common reference for financial markets. Without widely accepted benchmarks, it would be more difficult to compare interest rates and price financial products consistently.

They can affect:

• Borrowing costs: Higher benchmark rates can make loans more expensive.

• Savings returns: Banks may increase deposit and savings rates when market rates rise.

• Mortgage payments: Variable-rate mortgages may become more expensive when their reference rate increases.

• Business financing: Companies may face higher costs when borrowing rates rise.

• Investment returns: Changes in benchmark rates can influence bond yields and other investments.

• Economic activity: Central banks use interest rates to influence borrowing, spending, investment, and inflation.

Because of these effects, benchmark rates are closely watched by banks, businesses, investors, and consumers.

Common Types of Benchmark Interest Rates

Different countries and financial markets use different benchmark rates.

Central Bank Policy Rates

One of the most important types of benchmark rates is a central bank policy rate. A central bank sets policy rates to influence broader financial conditions.

For example, the U.S. Federal Reserve establishes a target range for the federal funds rate. Changes in this rate can influence other interest rates throughout the U.S. economy.

Similarly, other central banks use their own policy rates to influence borrowing and economic activity.

A central bank may raise rates when it wants to slow demand and help control inflation. It may lower rates when it wants to encourage borrowing and economic activity.

SOFR

SOFR, or the Secured Overnight Financing Rate, is an important benchmark for U.S. dollar financial markets. It reflects the cost of borrowing cash overnight using U.S. Treasury securities as collateral.

SOFR became particularly important after the financial industry moved away from LIBOR, which had historically been used as a benchmark for many loans and financial contracts.

EURIBOR

EURIBOR, or the Euro Interbank Offered Rate, is a major benchmark associated with euro-denominated financial markets. It is used in various financial contracts, including some mortgages and loans.

The particular benchmark used depends on the currency, market, and financial product involved.

Benchmark Rate vs. Interest Rate

A benchmark interest rate and the interest rate you actually pay are not necessarily the same thing.

The benchmark provides a reference, while the final rate on a financial product can include an additional spread or margin.

For example, imagine a variable-rate business loan priced at:

Benchmark rate + 2.5%

If the benchmark is 4%, the loan rate would be 6.5%.

If the benchmark rises to 5%, the loan rate could increase to 7.5%, assuming the lender's margin remains unchanged.

This is why borrowers with variable-rate loans can see their payments increase when benchmark rates rise.

How Benchmark Rates Affect Consumers

Benchmark rates can have a significant effect on everyday finances.

Mortgages

Some variable- or adjustable-rate mortgages are linked directly or indirectly to benchmark rates. When the relevant benchmark rises, the mortgage interest rate may rise as well.

A higher rate can increase monthly payments and the total amount of interest paid over the life of the loan.

Fixed-rate mortgages are generally less immediately sensitive to benchmark changes after the loan has been issued because the interest rate is locked for the agreed period.

Personal and Business Loans

Variable-rate loans may also be tied to a benchmark. If the benchmark increases, borrowing can become more expensive.

For someone considering a loan, understanding which benchmark is used and how frequently the rate can change is important.

Credit Cards

Credit card interest rates can also be influenced by broader market interest rates. Many credit cards use variable rates, meaning their annual percentage rate can change over time.

However, the exact relationship between a particular credit card rate and a benchmark depends on the card's terms.

Savings Accounts

Benchmark rates can influence savings rates too. When market interest rates rise, banks may increase the rates they offer on deposits and savings accounts, although they do not necessarily pass along the entire increase.

This means changes in benchmark rates can affect both sides of personal finance: the cost of borrowing and the potential return on savings.

Why Do Benchmark Rates Change?

Some benchmark rates change because central banks adjust monetary policy. Central banks consider factors such as:

• Inflation

• Employment

• Economic growth

• Consumer spending

• Financial stability

• Overall economic conditions

Other benchmarks, particularly market-based rates, can move because of supply and demand, financial-market conditions, expectations, and other factors.

Benchmark rates therefore do not all behave in exactly the same way.

What Happens When Benchmark Rates Rise?

When benchmark rates rise, borrowing generally becomes more expensive.

For example, a borrower with a variable-rate loan may see the interest rate increase. New borrowers may also receive higher rates on mortgages, business loans, and other forms of credit.

At the same time, savers may benefit if banks increase deposit rates.

Higher rates can also discourage borrowing and spending. Businesses may delay investments, and consumers may postpone large purchases financed with loans.

What Happens When Benchmark Rates Fall?

When benchmark rates fall, the opposite can happen.

Borrowing may become cheaper, encouraging consumers and businesses to take loans and spend or invest more. Existing variable-rate borrowers may see their interest costs decrease.

Savings rates may also decline, however, meaning savers could earn less interest on deposits.

Therefore, changes in benchmark rates can create both benefits and disadvantages depending on whether you are primarily a borrower, saver, or investor.

What Should Borrowers Look For?

If you are considering a variable-rate loan, don't look only at the current interest rate. Find out which benchmark the loan uses and how the rate is calculated.

Important questions include:

1. Which benchmark determines the interest rate?

2. What margin or spread does the lender add?

3. How often can the interest rate change?

4. Is there a minimum or maximum rate?

5. How will a rate change affect the monthly payment?

6. Are there fees or other borrowing costs?

Understanding these details can help you estimate how your payments could change if market interest rates move.

The Bottom Line

A benchmark interest rate is a reference rate used to help determine or compare other interest rates. It plays an important role in financial markets and can influence the cost of loans, mortgage rates, credit card rates, savings returns, and business financing.

For consumers, the most important point is that a benchmark is usually not the final rate you pay. A lender may add a margin based on factors such as credit risk and the type of loan.

Understanding the benchmark behind a financial product can therefore help you better understand why its interest rate changes—and how changes in the broader economy may affect your finances.