Demystifying Interest Rates in South Africa: How the Repo and Prime Lending Rates Impact your Wallet

Written by Arthur Van Wyk



For many people, financial terms like “repo rate” and “prime lending rate” can be confusing.

While most of us know that these rates impact how much interest we pay on loans, the details of how they work and how they are set may be less clear. In South Africa, these two key rates play a big role in the economy, especially when it comes to buying property, taking out loans, and saving money.

In this guide, we will explain what the repo rate and prime lending rate are, how they work together, and how they affect the property market and personal finance in a way that’s easy to understand.

What is the South African Reserve Bank?

Before diving into the definitions of repo rate and prime lending rate, it’s important to understand the role of the South African Reserve Bank.

The South African Reserve Bank (SARB) is the central bank of the country. It is responsible for managing the country's money supply, ensuring price stability, and promoting a stable financial system. In simpler terms, they are the ones in charge of keeping our economy balanced.

One of the main ways the Reserve Bank does this is by adjusting interest rates. They do this to influence how much money people spend or save. When interest rates are high, people are less likely to borrow money and are encouraged to save more. On the other hand, when interest rates are low, borrowing becomes cheaper, which encourages spending and investment. By managing interest rates, the Reserve Bank can help control inflation (the rate at which prices of goods and services rise) and support economic growth.

What is the Repo Rate?

The repo rate is the interest rate at which commercial banks borrow money from the South African Reserve Bank. In simple terms, it's the cost of borrowing for the banks. When the Reserve Bank raises or lowers the repo rate, it directly affects how much it costs banks to get money. This, in turn, affects the interest rates that banks offer to consumers when they lend money for things like home loans, personal loans, or car loans.

For example, if the repo rate is set at 6.75%, banks have to pay that interest rate when borrowing money from the Reserve Bank. If the Reserve Bank increases the repo rate, it becomes more expensive for the banks to borrow money. As a result, banks pass these costs onto consumers by raising the interest rates on loans. When the repo rate goes down, borrowing costs decrease, and banks lower interest rates, making loans cheaper for consumers.

What is the Prime Lending Rate?

The prime lending rate is the interest rate that commercial banks charge their most reliable or creditworthy customers.

It is usually a few percentage points higher than the repo rate, as banks need to make a profit when they lend money. The difference between the repo rate and the prime lending rate is the bank's profit margin.

In South Africa, the prime lending rate is typically set at a few percentage points above the repo rate. For example, if the repo rate is 6.75%, the prime lending rate might be around 10.25%. The prime lending rate is important because it serves as the base rate for most loans in the country. When you apply for a loan, the interest rate you are offered will likely be the prime lending rate plus an additional amount, depending on how risky the bank considers lending to you.

How Do Banks Set Interest Rates?

When banks decide how much interest to charge on loans, they don’t offer the same rate to everyone. Instead, they start with the prime lending rate and adjust it based on the borrower’s risk profile. A person who has a good credit score, steady income, and reliable financial history might be offered a loan at prime rate or slightly above it. This is because they are considered a low-risk borrower. On the other hand, someone with a poor credit score or unstable income may be considered higher risk and could be offered a loan at a rate higher than prime (e.g., prime + 2%).

Banks are willing to take on more risk for higher potential profits, which is why riskier borrowers tend to pay higher interest rates. On the flip side, low-risk borrowers are likely to get lower interest rates as banks are confident they will repay the loan.

How Repo and Prime Rates Work Together

The repo rate and prime lending rate are closely linked. When the Reserve Bank changes the repo rate, it has a ripple effect on the prime lending rate. For example, if the Reserve Bank raises the repo rate by 0.5%, banks will also raise the prime lending rate by a similar amount. This increase means that loans linked to the prime rate, such as home loans, will become more expensive.

If the repo rate goes down, the opposite happens. Banks reduce the prime lending rate, and consumers benefit from lower interest rates on loans. This link between repo and prime rates is crucial for understanding how much you’ll pay on loans, especially large loans like home loans.

The Impact on Property Buyers



When interest rates are high, buying property becomes more expensive. This is because the monthly repayments on home loans increase when interest rates go up. As a result, fewer people can afford to buy homes, leading to a drop in demand.

When there are fewer buyers, property prices tend to grow more slowly, and in some cases, they may even decline.

For example, if the prime lending rate is 10.25% and a buyer takes out a home loan at prime plus 1.75%, the interest rate on their loan would be 12%. If the Reserve Bank raises the repo rate by 0.5%, the prime rate would also rise, making the loan's interest rate 12.5%. This increase in the interest rate means higher monthly repayments, making it more expensive to buy property.

The Impact on Property Sellers

Higher interest rates don’t just affect buyers—they also impact property sellers. When interest rates are high, fewer people can afford to buy homes, which can lead to longer selling times and less competition among buyers. In a high-interest-rate environment, property prices tend to stabilise or even decrease because the demand for homes drops.

For sellers, this can mean that it takes longer to sell a home, and they may need to lower the asking price to attract buyers. On the other hand, when interest rates are low, more people can afford to buy homes, and there is often greater competition among buyers. This increased demand can lead to faster sales and higher property prices.

How Do Interest Rates Affect the Economy?

Interest rates don’t just impact the property market; they have a broader effect on the overall economy. When the Reserve Bank raises interest rates, it becomes more expensive for businesses and individuals to borrow money. This can lead to a slowdown in economic growth as people cut back on spending and businesses reduce their investments.

Lower interest rates, on the other hand, stimulate economic growth by making it cheaper to borrow money. This encourages spending and investment, which can help the economy grow. However, the Reserve Bank must be careful when lowering rates because too much growth too quickly can lead to inflation.

How to Navigate Changing Interest Rates

Understanding the repo rate and prime lending rate is essential for making informed financial decisions, especially when it comes to large commitments like home loans or property investments. These rates directly influence how much interest you'll pay on loans, which can have a significant impact on your monthly expenses and long-term financial planning.

One of the most important aspects of navigating changing interest rates is staying informed.

Interest rates can fluctuate due to various economic factors, such as inflation, government policy, or global financial events. By keeping track of these changes, you can anticipate shifts in borrowing costs and make strategic decisions about when to take out a loan or refinance an existing one.

If you're considering buying property, it's crucial to understand how interest rates affect your bond payments. Higher interest rates mean higher monthly repayments and more money paid in interest over the life of your loan. On the other hand, when interest rates are low, it can be an opportune time to lock in a more affordable bond. This can save you thousands over the long term, especially for big purchases like homes. Monitoring rate trends allows you to plan and potentially save on future payments.

For sellers, understanding the interest rate environment can help you gauge market demand. When interest rates rise, fewer buyers can afford high loan repayments, which may lead to slower sales and lower offers. Conversely, in a low-interest-rate environment, buyer demand tends to increase, giving sellers an advantage in setting competitive prices and attracting quicker sales.

In conclusion, whether you're buying or selling, interest rates are a key factor in your financial journey.

Staying informed and understanding how they work will help you navigate the market, avoid pitfalls, and take advantage of opportunities that arise during periods of rate changes. By making interest rates a regular part of your financial awareness, you can position yourself to make smart, strategic moves in property and other financial investments.