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Should you invest ALL your extra money into your bond?

Should you invest in equities or put all your extra cash into your bond? Stealthy Wealth, a blog site run by an embedded software engineer with degrees in electronic engineering and IT, who is on a mission to retire by the age of 45, answers a reader’s question.


I have been hammering my bond with all my extra cash in order to avoid paying huge interest for years to come. I am doing quite well and should be bond free within the next couple of years.

The problem is I have no other investments i.e. equities or savings. I am currently of the belief I need to obliterate the bond first and then start investing as intensively as I have been paying off the bond.

There are lots of tax breaks with pumping the bond full versus equities. I look forward to reading your stealthy wealthy point of view on this contentious subject matter. – Chris


Well, first off Chris, being bond-free is going to be pretty sweet! Once you get there, that is a major expense you can scratch off your budget, and will put you in a league above most people; so soak it in! (In fact some people will never get to experience this feeling – too many “upgrades” during their lifetime.)

The next thing I want to say is that paying off debt is always a good idea; there are no two ways about it.

The advantages of paying extra into your bond:

  1. It is risk free – the money you put in cannot be wiped out

  2. It is tax free – one of the few things in life that is!

  3. It is inflation beating – as long as the interest rate is above inflation (as far as I know this has always been the case in South Africa)

  4. Low cost – there are no extra fees involved (your bond fee is charged regardless)

  5. Highly liquid – you can always take the money out again if you need to (I am assuming a flexi reserve account on your home loan)

And this is why I say that paying extra into your home loan is definitely a good idea! Assuming you have a bond at prime, by paying extra, you are earning a 10.5% risk-free, tax-free, fee-free, inflation-beating and highly liquid return. Not too shabby!

So I think we can agree that paying extra into your bond is a very good idea. But I guess the question is, is it the best idea?

How exposed is Chris?pants down

On the down side, Chris has identified that he has no other investments, and this is one disadvantage of throwing everything into your bond. He has ended up in a situation where he has no diversification (although I am basing this on the email, Chris may have a pension plan or similar). Also it may be possible to get a better return from some other investment classes than what you would get by paying extra into your bond.

Chris is also quite correct that this is a highly contentious issue with one camp saying home loan debt is not so bad because it is used to finance an appreciating asset, while the other camp claims that all debt is bad and should be extinguished immediately.

Well here is my 2 cents on it…but before continuing you may also want to check out this nicely balanced write up on the topic by Alexander Forbes. So, if you are not going to be putting your extra dosh into your bond, what are your other options?

You could go for some government bonds or similar (like James Bonds – wow terrible!), but the Stealthy Wealth Numbers Page says your return will be less than the prime interest rate (currently 10.5%). So the home loan trumps this.

The other option is equities – the returns are generally better than the prime interest rate over the longer term, so this seems like a contender. I will examine some scenarios…run for cover, here come the numbers!

First off, some assumptions

So in this scenario your monthly payment is R8,985. As much as I would like you all to think I calculated that in my head, I cannot claim it. Luckily for us we live in an age where the tools we need are almost always freely available, we just need to find them. For this calculation I used the handy Property24 calculator (you can view this particular scenario by clicking here).

So if we were to just go along our lives and pay the minimum, it will result in us paying off the house at the end of the 20 years. But I would like to think we are more Stealthy than that, and firstly we did not find the most expensive house we could afford, but instead bought one that suited our needs. And secondly, we tend to spend less than other people. All this results in us being able to put some extra money into our bond every month*.

I will run a 20-year scenario since that is the base case and general duration of a home loan when nothing extra is added.

Scenario 1 – Extra R2,000south african money

So you have worked out according to your budget that you have an extra R2,000 a month. You decide that you will either pay this extra R2,000 into your bond, or you will invest it in equities instead.

Option A) Extra R2,000 into bond

  • This means that your house is now paid off in around 12 years.
  • After that you have an extra R10,985/month to invest (you no longer have a bond payment of R8,985, and you no longer have to put the R2,000 extra in every month).
  • So for the remainder of the 20-year period you invest the full R10,985 into equities.

Taking this option means that after 20 years you get

1 – A paid off house

2 – A nice nest egg of R1,919m

Option B) Invest the R2,000

  • You pay the minimum into your bond, and your house is paid off after 20 years
  • You invest R2,000 per month into equities every month for 20 years

Taking this option means that after 20 years you get

1 – A paid off house

2 – A nicer nest egg of R2,715m

So Option B seems to be the better choice by around R800,000.

Scenario 2 – Extra R6,000bad money habits resize

In this scenario you have your extra R2,000 a month, but in addition to this your boss decides to emigrate to Kazakstan to try and find Borat, and you land his nice cushy job, resulting in you having an extra R6,000 per month despite now doing less work than you used to. And because you are super Stealthy, you realise that increased earnings should not equal increased expenses, and you decide the money should be put to good use.
So again, your options are either pay this extra money into your bond, or invest it into equities.

Let’s see what happens in each scenario:

Option A) Extra R6,000 into bond

  • This means that your house is now paid off in just over 7 years.
  • After that you have an extra R14,985/month to invest (you no longer have a bond payment of R8,985, and you no longer have to put the R6,000 extra in every month).
  • So for the remainder of the 20-year period, you invest the full R14,985 into equities.

Taking this option means that after 20 years you get

1 – A paid off house

2 – A nice nest egg of R6,539m

Option B) Invest the R6,000

  • You pay the minimum into your bond, and your house is paid off after 20 years
  • You invest R6,000 per month every month for 20 years (a.k.a Discipline!)

Taking this option means that after 20 years you get

1 – A paid off house

2 – A very lekker nest egg of R8,077m

So once again Option B seems like the better choice.

Investing the money is the better choice, or is it?

futuristic house

Why should you rethink your impulse to buy the unique home? Click the pic

In both the scenarios above it seemed obvious that you would be better off investing any extra money into equities instead of putting it into your bond. But unfortunately there is more to it.

The main issue here is that when putting the money into your bond your returns are guaranteed, whereas investing in equities they are not. Furthermore, the shorter your time frame, the more unreliable the equity returns can be. There is a chart which Coronation produced which I quite like and first showed in my blog post on Inflation Rates and Investment Returns in South Africa.

stealthy coronation graph

From the chart you can see that on shorter time frames, for example over five years, the returns from the equity market can vary drastically: in this case from 46.19% (wowziz!) to a mere 0.57% (ouch!). However, if you start looking over longer periods, the returns become a lot more “predictable” – the 15 years numbers are significantly better. But as always, the past returns are no guarantee of future performance.

So the way I see it is as follows:

  • If the extra repayment into your bond is going to result in you decreasing the loan time to around 15 years, then you should maybe consider putting the extra money into a low-cost equity ETF instead – because there is a good chance the returns from equities will outperform the interest rate of the bond.

  • If the extra repayment is going to result in you paying off your bond in 10 years or less, then maybe the safer option would be to squash your bond because the equity returns are somewhat less reliable and more risky.

Of course any combination of the two is definitely an option as well. Why not get the benefits of both by investing some of the extra money into equities and putting the rest into the bond? You could do a 50/50 split, or 60/40 (or if you are plain weird a 24.63/75.37 split). I guess it all depends on your risk appetite and where you are currently at in your life.

Personally, I am throwing most of my extra cash into equity investments because I am on a 15-year time frame, but having said that I am also putting some extra money into my bond.

(For some slightly different examples and assumptions answering the same question you may be interested in checking out this Maya on Money Article).

A last word on interest rates and taxtax-man-resize

The above scenarios used an interest rate of 10.5%. The scenarios also assumed equities would return 15.28%. This difference between the equity returns and the interest rate is what makes the investment into equity option come out on top in both scenarios.

An important consideration is therefore the current interest rate. If this rate goes up then it certainly starts bending my preference back towards the guaranteed returns of the bond. And, likewise, if the interest rate drops then the equity investment scenario becomes even more favourable. So it is important not to get too fixated one method and completely forget about the other. Be prepared to be flexible and adapt as the economic climate changes.

And always remember that the bond returns are tax free! However, now that we have TFSAs your investment could also be tax free (yay for the government – not often we get to say that!) In the scenarios above I did not factor in any tax implications of selling the investment at the end of the 20-year period. If you did not invest the extra funds into a TFSA and you were to sell, you could incur a capital gains tax (keeping in mind there would be tax implications for the selling of both Option A and Option B). For me this is not too much of an issue since I am planning on maxing out both my wife’s and my TFSA allocations, and we don’t plan on selling any investments outright, but rather living off them using the 4% Rule.

Summing it all upabacus

I think all this can be summarised nicely into a table showing the characteristics of the two options:

Into Bond Invest in Equities
Risk Risk free Riskier, especially over shorter periods
Tax Tax free Can be tax free, but it all depends on your TFSA situation
Return Guaranteed inflation beating return (provided interest rate stays above inflation) With the additional risk taken you can expect better returns. Can be inflation beating and over longer periods bond interest rate beating too
Fees Zero fees There will be fees (however these can be low if using ETFs)
Liquidity Highly liquid Pretty liquid – you can cash out at any time

The other important take away from all this is that whether you go one way or the other, or a blend of the two, there is no right or wrong answer and whatever you end up deciding will leave you better off in the long run – provided you are disciplined! Being in a situation where you are not only aware of the benefits of paying off your home loan quicker, but also in a position to do so, and faced with the dilemma of whether to invest the money instead, means you are actually facing a very nice problem.

I am sure there are many people out there who have been faced with this same decision of whether to put extra money into your bond, or invest it. I would love to hear about your thinking and eventual decision, and how it worked out/is working out for you?

Top photo: This beautiful seven-bedroom Constantia home is on the market for R32m through Pam Golding Properties. Click here to view it

This article is republished with the kind permission of Stealthy Wealth, a blog site run by an embedded software engineer with degrees in electronic engineering and IT, who is on a mission to retire by the age of 45. 

* My dad (that’s Stealthy Senior to you) always used to say, if you cannot afford to put an extra 10% into your bond every month then the house you are buying is too expensive. What happens if you are on the edge and the interest rates suddenly go up 3%? You could end up having your house repossessed. Some solid advice!

Disclaimer: The information above is not intended to be and does not constitute financial advice, investment advice, trading advice or any other advice or recommendation of any sort offered or endorsed by HomeTimes and Stealthy Wealth. Any expression of opinion is personal to the author and the author makes no guarantee of any sort regarding accuracy or completeness of any information or analysis supplied.


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