Selling an asset for more than you paid for it feels like a win.
And it is.
But the number that lands in your bank account is not necessarily the number you get to keep.
Whether you are selling an investment property, shares, part of a business, or another capital asset, the transaction may create a capital gain. And if you only start thinking about Capital Gains Tax after the sale has happened, you have started the conversation too late.
CGT is something to understand before you sell, not after.
What Capital Gains Tax Actually Is
Capital Gains Tax, or CGT, is not a separate tax. When you dispose of an asset and make a capital gain, a portion of the net capital gain may be included in your taxable income and taxed as part of your normal income tax calculation.
A disposal does not only mean selling something. SARS lists events including a sale, donation, exchange, loss, death and emigration as events that can trigger a disposal for CGT purposes.
The starting point is broadly:
Proceeds from the disposal – Base cost = Capital gain or loss
But that simple calculation hides the part that causes problems: base cost.
Your Base Cost Is More Than What You Paid
Imagine you bought an investment property for R1.8 million and later sold it for R2.6 million.
Looking only at those two numbers makes it appear that you made an R800,000 gain. But that is not necessarily the amount that will ultimately be subject to CGT.
Certain qualifying costs connected to acquiring, improving and disposing of an asset can form part of its base cost, depending on the nature of the expenditure and the applicable tax rules. That is why keeping records matters.
The paperwork you keep while you own an asset can affect the tax calculation when you eventually sell it.
The Exclusions Matter
For the 2027 year of assessment, a natural person generally receives an annual exclusion of R50,000 against aggregate capital gains or losses.
A qualifying primary residence can also benefit from a R3 million exclusion on the capital gain or loss, subject to the CGT rules and requirements.
That does not mean every property sale gets a R3 million exclusion. An investment property is not automatically a primary residence. Neither is a second home simply because you use it occasionally. The nature and use of the asset matter.
You Are Not Necessarily Taxed on the Whole Gain
For individuals, 40% of the net capital gain is included in taxable income. The actual tax ultimately payable depends on the taxpayer’s circumstances and marginal income tax rate.
For the 2027 year of assessment, the maximum effective CGT rate for individuals and special trusts is 18%. Companies have a maximum effective rate of 21.6%, while other trusts can reach 36%.
This is why saying “CGT is 18%” is misleading. It is a maximum effective rate for an individual, not a flat 18% tax automatically charged to every capital gain.
Timing Can Matter More Than You Think
For property, SARS states that the disposal generally occurs when the sale agreement is concluded rather than when transfer is eventually registered at the Deeds Office. That distinction can affect the year of assessment in which the gain falls.
It is one more reason why the tax conversation should happen before you sign, not months later when the transaction is already complete.
Before You Sell, Ask These Five Questions
- What did the asset originally cost?
- What additional expenditure may form part of its base cost?
- What is the expected selling price?
- Does an exclusion apply?
- What will the transaction do to your overall taxable position?
Those questions are much easier to answer while you still have options.
The Mindset Shift
Most people think about tax after a transaction. They sell the asset, receive the money and then ask their accountant what SARS will want.
Flip it around. Tax should be part of the decision before the transaction happens.
Understanding the tax consequence does not mean avoiding a good sale. It means knowing what the sale is actually worth to you after tax, before you commit to it.
Keep It Simple
- CGT can arise when you dispose of assets such as property, shares or business interests
- Your capital gain is not simply the selling price less what you originally paid
- For the 2027 year of assessment, natural persons generally have a R50,000 annual exclusion
- A qualifying primary residence can benefit from a R3 million exclusion on the capital gain or loss
- Individuals include 40% of their net capital gain in taxable income
- Speak to your accountant before signing a significant disposal, not after
The selling price tells you what someone will pay. The tax calculation tells you what the deal is actually worth to you.
General information only. Chat to your accountant about your specific situation.