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The Private-Versus-Business Principle
SARS allows deductions for expenses incurred in producing income, which is why the deductibility of car insurance hangs entirely on business use. Insurance on a purely private car is not deductible; insurance on a car used to earn income can be, in proportion to that use.
Everything below is an application of this one principle to the three common situations — salaried employee, sole proprietor, and company. The structure you operate under decides how the deduction is claimed, but the underlying test is always the same.
Salaried Employees
For most salaried employees, insurance on a private vehicle is not deductible at all. The exception is where you receive a travel allowance and claim against it: by keeping a SARS-compliant logbook you can claim a portion of running costs, including insurance, attributable to business kilometres.
Without a travel allowance and a logbook, there is no route to deduct private motor insurance as an employee. The logbook is the gateway — no logbook, no apportionment, no claim.
Sole Proprietors
A sole proprietor using a vehicle for the business may deduct insurance in proportion to business use. If the car is used 60% for business, then 60% of the premium is deductible against business income, alongside the same proportion of fuel, maintenance and other running costs.
The apportionment must be evidenced, which again means a logbook recording business versus private travel across the year. The percentage is calculated at year-end from that record, not estimated.
Companies
Insurance on a company-owned or company-leased vehicle is generally fully deductible as a business expense at the company level. The private-use element is dealt with separately, as a fringe benefit taxed in the hands of the employee who uses the car, rather than by disallowing part of the premium.
This is why the company route can be cleaner for a vehicle with mixed use: the premium is deducted in full by the company, and the personal-use adjustment happens on the individual's side through the fringe-benefit rules.
The Records SARS Expects
Whatever the structure, the deduction stands or falls on documentation. Keep the annual policy schedule, proof of premium payments, a logbook for any usage apportionment, and the business-use endorsement on the policy itself, since SARS can ask for all of these in an audit.
A business-use deduction on a policy that was never endorsed for business use is a weak position to defend. The endorsement and the logbook together are what make the claim both correct for insurance purposes and defensible for tax.
Excess, Payouts and Other Edges
An excess paid on a business-use claim is typically deductible in the same business-use proportion as the premium, since it is a cost of the business activity. The treatment follows the use, just as the premium does.
Claim payouts run the other way. A payout that simply replaces a vehicle is generally not income, but for a business a payout exceeding the asset's tax value can have recoupment implications. This is where the edges get technical and professional advice earns its fee.
Getting It Right
The practical sequence is to match the policy's use class to reality, endorse it for business use where applicable, keep a logbook from the start of the tax year, and retain every schedule and payment record. Do that, and the deduction is straightforward to claim and defend.
Sole proprietors and companies usually benefit from a tax practitioner to handle apportionment and recoupment correctly; a salaried traveller can generally manage a logbook-based travel-allowance claim on eFiling. Either way, the records come first and the claim follows from them.