Interest rate

An interest rate is the percentage a lender charges a borrower for the use of money, expressed as an annual figure on the loan’s principal. It is the price of borrowed money, and the return paid to savers. Rates shape mortgages, credit cards, business loans, bond yields, and the broader cost of capital across an economy.

When a bank lends $10,000 at a 7% annual rate, the borrower owes $700 in interest for that year, plus the original amount. The same logic runs in reverse for depositors, who earn interest when banks borrow their cash.

Most consumer rates are quoted as an Annual Percentage Rate (APR), which folds in certain fees alongside the headline interest figure. According to the U.S. Securities and Exchange Commission, APR helps buyers compare loan offers on a like-for-like basis. Rates may be fixed for the life of a loan or variable, moving with a benchmark such as the Secured Overnight Financing Rate (SOFR).

Economists distinguish nominal rates from real rates. A real rate strips out inflation, so a 6% loan during 3% inflation carries a real cost closer to 3%. That gap matters for households deciding whether to borrow and for investors choosing between bonds, equities, and cash.

How it works

Central banks set a policy rate that anchors the broader rate structure. In the United States, the Federal Open Market Committee adjusts the federal funds target range, and the Federal Reserve publishes its decisions eight times a year. Commercial banks then price loans off that benchmark plus a spread for risk, term, and operating cost.

Lenders weigh four inputs when quoting a rate: the policy benchmark, the borrower’s credit profile, the loan term, and the inflation outlook. A borrower with a strong credit score pays less than one with a thin file — because expected losses are lower. Longer terms usually carry higher rates, since uncertainty rises with time.

According to the International Monetary Fund, global policy rates climbed sharply between 2022 and 2024 as central banks fought post-pandemic inflation, then began easing in late 2024 as price pressures cooled.

Interest can be simple or compound. Simple interest is charged only on the original principal, while compound interest accrues on prior interest as well. The U.S. Consumer Financial Protection Bureau notes that compounding is what makes long-dated debt and long-horizon savings behave so differently from a short loan.

Examples

A 30-year U.S. fixed mortgage quoted at 7.0% in 2024 — near a two-decade high — cost about $1,330 a month in interest and principal for every $200,000 borrowed, according to Freddie Mac survey data. Borrowers who waited for rates to drop into the low-6% range in 2025 trimmed roughly $130 a month off the same balance.

In July 2023, the European Central Bank — the eurozone’s monetary authority — lifted its deposit facility rate to 3.75%, the highest setting since the euro launched in 1999. The move pushed variable-rate business loans across Germany, France, and Italy higher within weeks, and tipped several eurozone economies into shallow contractions through early 2024.

Emerging markets show how policy and credit rates interact. Brazil’s Selic rate hit 13.75% in 2022 before the central bank began cutting in 2023, while Turkey ran negative real rates for years before reversing course in 2023 with a series of large hikes. Both moves rippled into local mortgage and small-business lending almost immediately.

Outsourcing buyers feel rates too. When the cost of capital rises, finance teams scrutinise large contracts more closely, and providers in the Philippines and India often see a shift toward shorter pilot engagements before full rollouts.

Related terms

• Bond: a debt security whose price moves inversely to interest rates.
• Dividend: cash paid to shareholders, often compared against bond yields when rates shift.
• Asset allocation: the mix of stocks, bonds, and cash that rate cycles can tilt.
• Capital loss: the hit a bondholder takes when rising rates push prices down.
• Growth investing: a style especially sensitive to rate moves through discounted future cash flows.
• Value investing: a counterpart style that often holds up better when rates climb.
• Seed money: early-stage capital whose cost rises sharply in tight-rate cycles.

FAQ

What is the difference between a nominal and a real interest rate?

A nominal rate is the quoted figure on a loan or deposit, while a real rate subtracts expected inflation. The real rate shows the true purchasing-power cost of borrowing or the real return on savings.

Who sets interest rates?

Central banks set a policy rate that anchors short-term borrowing costs, and commercial lenders price retail and business loans off that benchmark plus a risk spread. Market forces, especially bond traders, set longer-dated rates.

Why do central banks raise interest rates?

Central banks raise rates to cool demand and pull inflation back toward target. Higher rates make borrowing more expensive, which slows spending, hiring, and price increases over time.

How does an interest rate change affect my mortgage?

A fixed-rate mortgage keeps the same payment for its term, so rate moves only matter at refinance. A variable-rate or adjustable mortgage reprices periodically, so a higher benchmark pushes monthly payments up at the next reset.

What is APR and how is it different from the interest rate?

APR, or Annual Percentage Rate, bundles the interest rate with certain mandatory fees, so it shows the all-in annual cost of a loan. The headline interest rate alone excludes those fees, so APR is usually the higher of the two figures.

Are higher interest rates always bad?

No. Higher rates hurt borrowers but help savers, retirees living off fixed-income returns, and pension funds matching long-dated liabilities. The effect depends entirely on which side of the balance sheet you sit on.

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