In our previous lesson, we talked about supply, demand, and the way they affect prices. We learned that prices may rise when many people want a product but there is not enough supply.
Source: ChatGPT
But what happens when the prices of many products and services keep rising across the economy?
This situation is called inflation. When inflation becomes too high, central banks often respond by increasing interest rates. We hear this frequently in economic news, but the relationship between inflation and interest rates can seem confusing.
Why would making loans more expensive help control prices?
Let’s explain it with simple examples.
Inflation means a general increase in prices over time.
Imagine that you normally spend $100 on groceries every week. A year later, the same products cost $110. Your money can now buy less than before. In other words, your purchasing power has fallen.
One expensive product does not necessarily mean there is inflation. The price of strawberries may increase because of bad weather, for example. Inflation happens when prices rise more generally across the economy, including food, housing, transportation, and other services.
A small and stable level of inflation is common in many economies. The problem begins when prices rise too quickly or unpredictably.
An interest rate is basically the cost of borrowing money.
Imagine that you borrow $1,000 from a bank. You must repay the original amount and some extra money. That extra cost is connected to the interest rate.
Interest also affects savings. When interest rates are higher, people may receive a better return for keeping their money in a savings account.
Central banks set an important rate called the policy interest rate. This rate influences other interest rates in the economy, including the rates on consumer loans, business loans, credit cards, and savings accounts.
Let’s imagine that loans are cheap and easy to obtain. More people may borrow money to buy cars, homes, furniture, or other products. Businesses may also borrow more to invest and expand.
This increases spending and demand in the economy. If businesses cannot increase supply quickly enough, strong demand can push prices higher.
When the central bank raises interest rates, borrowing usually becomes more expensive. Some people may delay buying a new car or home. Others may use their credit cards less. Businesses may postpone new investments because financing costs are higher.
At the same time, saving money may become more attractive.
As borrowing and spending slow down, demand may also become weaker. Businesses then face less pressure to increase their prices. Over time, this can help slow inflation.
Imagine a popular café with only 20 tables. Every evening, many customers arrive, and the café is always full. Because demand is very strong, the owner may feel comfortable increasing prices.
Now imagine that people begin spending less. Some customers make coffee at home, while others visit the café less often.
The café may no longer be able to raise its prices so easily. It may even offer discounts to attract customers.
The central bank cannot directly decide the price of coffee. However, by changing interest rates, it can influence borrowing, saving, and spending across the economy.
Usually, no.
An interest rate increase does not change everyone’s behaviour the next morning. People and businesses need time to adjust their spending, saving, borrowing, and investment decisions.
For this reason, monetary policy often affects the economy with a delay. It may take several months before the full results become visible.
Higher interest rates also cannot solve every cause of inflation. If food prices rise because of a drought or energy prices increase because of a supply problem, higher interest rates cannot produce more food or energy.
However, they may stop these price increases from spreading too widely across the economy.
High interest rates can help control inflation, but they also have costs.
Expensive loans can reduce home purchases, business investments, and consumer spending. Companies may produce less or hire fewer workers. Economic growth may slow down.
This is why central banks face a difficult balancing act. If interest rates are too low, inflation may remain high. If they are too high for too long, economic activity may become too weak.
There is no automatic or perfect result. The effect depends on why inflation is rising, how people respond, and the general condition of the economy.
We can remember the basic relationship in this way:
When inflation is high, a central bank may raise interest rates. Higher rates make borrowing more expensive and saving more attractive. This can reduce spending and demand, helping inflation slow down over time.
The important phrase is over time. Interest rates are powerful, but they do not work like an instant switch.
The next time you hear that a central bank has changed its interest rate, ask yourself: Is it trying to reduce inflation, support economic activity, or balance both?
Discussion question: Have higher interest rates ever changed one of your spending, saving, or borrowing decisions?
