Hi there and thank you for your question,
I will try to assist you with your legal question but please feel free to ask as many follow up questions as you like until you are 100% satisfied.
Well from a legal point of view, if you buy the car in the name of your business (I assume a company, or a close corporation) then the business becomes the owner of the vehicle. If anything happens to your business (e.g. liquidation) then you won't have a claim against the vehicle as you would if you bought the vehicle in your personal name. Really the big difference is who the owner of the vehicle is. If it is in the name of your business, your personal creditors would not be able to attach the vehicle to settle judgments that they obtain against you in your personal name.
From an accounting point of view, it becomes quite complicated since SARS has complex rules about how much you can claim for a car. That, an accountant will need to explain.
To set this up, you really just need to ensure that when you buy the vehicle it is registered in the name of your business. You can be the "representative", but the business needs to be listed as the "registered owner".
Does that assist?
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Good luck and best regards,