One of the first questions many buyers ask after receiving a home loan offer is, “What interest rate will I get?”
The next question usually follows soon after.
“Should I choose a fixed or variable interest rate?”
It’s an important decision because your interest rate directly affects how much you’ll repay each month and how much your home loan will cost over its lifetime.
At LEAP Home Loans, we regularly work with buyers who are unsure how interest rates work or whether fixing their rate is the right move. The answer isn’t always straightforward because the best option depends on your financial circumstances, your plans for the property and what is happening in the wider economy.
Understanding the difference between fixed and variable interest rates can help you make a more informed decision before signing your home loan agreement.
What Determines Home Loan Interest Rates?
Home loan interest rates in South Africa are closely linked to the country’s monetary policy.
The South African Reserve Bank (SARB) sets the repo rate, which is the interest rate at which commercial banks borrow money from the Reserve Bank.
Commercial banks then use the repo rate to determine the prime lending rate, which serves as the benchmark for most home loans.
When the Reserve Bank increases the repo rate, the prime lending rate usually increases too. When the repo rate is reduced, the prime lending rate generally falls.
For buyers with variable rate home loans, these changes affect monthly bond repayments.
This is why announcements from the South African Reserve Bank receive so much attention from homeowners. Even relatively small adjustments to the repo rate can influence household budgets over time.
How Do Banks Decide What Interest Rate You’ll Receive?
Although the prime lending rate provides the benchmark, not every borrower receives exactly the same interest rate.
Banks assess several factors before making an offer, including:
- Your credit record and credit score.
- Your income and affordability.
- Your employment stability.
- The size of your deposit.
- The property’s value.
- Your overall financial profile.
A buyer with a strong credit history, stable income and lower lending risk may receive an interest rate below prime.
Someone with a higher risk profile may receive a rate above prime.
This is one of the reasons we encourage buyers to obtain a home loan pre-approval before beginning their property search. It provides a realistic indication of affordability and allows buyers to understand how different banks may assess their application.
Through LEAP Home Loans, one application can be submitted to multiple participating banks, giving buyers the opportunity to compare offers rather than approaching each lender individually.
What Is a Variable Interest Rate?
A variable interest rate is the standard type of home loan offered in South Africa.
As the name suggests, the interest rate changes whenever the prime lending rate changes.
If the Reserve Bank lowers the repo rate and commercial banks reduce prime, your monthly repayment usually decreases.
If interest rates increase, your monthly repayment also increases.
For many buyers, this flexibility is beneficial because they automatically benefit from future interest rate reductions without having to renegotiate their loan.
Over the life of a 20 year home loan, interest rates are likely to rise and fall several times.
This means buyers with variable rate loans experience both higher and lower repayments throughout the loan term.
What Is a Fixed Interest Rate?
A fixed interest rate allows you to lock in your home loan interest rate for a specific period.
Rather than your repayments increasing or decreasing with changes to the prime lending rate, they remain the same during the agreed fixed rate period.
This provides certainty and can make monthly budgeting easier.
It’s important to understand that fixed rates are not normally selected when the home loan is first granted.
Once your bond has been registered, you can approach your bank to enquire whether a fixed rate option is available. The bank will then provide a quotation based on the current interest rate environment and the period you wish to fix.
Fixed rate periods are typically available for a limited number of years, after which the loan generally returns to a variable interest rate unless another agreement is reached.
Why Would Someone Choose a Fixed Interest Rate?
There isn’t a universal right or wrong answer.
In our experience, buyers usually consider fixing their interest rate when they believe borrowing costs are likely to increase significantly.
For example, someone with a tight monthly budget may prefer knowing exactly what their bond repayment will be for the next few years rather than worrying about future interest rate increases.
Fixed rates can also provide peace of mind for first time buyers who are still adjusting to the costs of home ownership.
Knowing that one of their largest monthly expenses won’t change for a while can make financial planning much easier.
However, this stability comes with an important trade off.
If interest rates fall during the fixed rate period, buyers generally won’t benefit from those lower repayments until the fixed term ends.
Why Do Many Buyers Stay on Variable Rates?
Variable interest rates remain the most common choice for one simple reason.
They allow borrowers to benefit whenever interest rates decrease.
Over the life of a long term home loan, interest rates naturally move through different economic cycles.
While repayments may increase during periods of rising inflation, they can also decrease when the Reserve Bank begins lowering rates again.
Many buyers are comfortable managing these fluctuations because they understand that home ownership is a long term commitment rather than a short term financial decision.
Which Option Is Better?
This is probably the question we hear most often.
The truth is that neither option is automatically better.
The right decision depends on your personal circumstances.
A fixed interest rate may suit buyers who:
- Prefer predictable monthly repayments.
- Have limited room in their monthly budget.
- Value certainty over flexibility.
- Believe interest rates are likely to rise.
A variable interest rate may suit buyers who:
- Can comfortably manage some repayment fluctuations.
- Want to benefit from future interest rate reductions.
- Are planning to own the property for many years.
- Prefer the flexibility of remaining linked to the prime lending rate.
Rather than trying to predict future interest rate movements, we encourage buyers to choose the option that best supports their own financial situation.
How Do Interest Rate Changes Affect Your Monthly Repayments?
Even relatively small changes to the prime lending rate can influence your monthly bond repayment.
The larger your outstanding home loan balance, the greater the effect each interest rate adjustment is likely to have.
This is why it’s important not to borrow right up to your maximum affordability.
At LEAP Home Loans, we often encourage buyers to leave themselves some financial breathing room. Building a buffer into your budget can make it much easier to absorb future interest rate increases without placing unnecessary strain on your finances.
Can You Negotiate Your Interest Rate?
Many buyers don’t realise that interest rates are often negotiable.
While no bank is obliged to reduce its offer, buyers with strong financial profiles may receive better interest rates by comparing multiple lenders.
Banks compete for quality borrowers, and the first offer isn’t always the most competitive.
Submitting your application through a bond originator allows multiple participating banks to assess your application simultaneously, increasing the opportunity to compare available offers.
Even a small reduction in your interest rate could save you thousands of rand over the lifetime of your home loan.
Interest Rates Are Only One Part of the Decision
While interest rates are important, they shouldn’t be the only factor influencing your home loan decision.
Buyers should also consider:
- Monthly affordability.
- Bond registration and transfer costs.
- The property’s long term suitability.
- Their employment stability.
- Emergency savings.
- Future financial goals.
Buying a home is one of the biggest financial commitments most people will ever make. Choosing a loan that fits comfortably within your budget is often more valuable than focusing only on securing the lowest possible interest rate.
Choosing the Right Home Loan for Your Situation
Every buyer’s financial circumstances are different.
Some value the certainty of fixed repayments, while others prefer the flexibility that comes with a variable interest rate.
Neither approach is automatically better. The right choice depends on your income, financial goals, appetite for risk and how comfortably you can manage future changes in interest rates.
At LEAP Home Loans, we help buyers understand more than just the interest rate offered by the bank. We explain how different home loan options work, compare offers from multiple participating lenders and guide buyers through the process with practical advice every step of the way.
If you’re preparing to buy a home and would like to understand what interest rate you may qualify for, or simply want to compare your options before making an offer, we’re here to help.
Because the best home loan isn’t always the one with the lowest advertised rate. It’s the one that supports your long term financial goals while giving you the confidence to enjoy your new home.
