Commission earners face a unique tax challenge in South Africa. Unlike salaried employees whose income is predictable month to month, commission income fluctuates — sometimes significantly. This makes accurate PAYE deduction difficult and creates specific rules under the Income Tax Act for how commission is taxed and what expenses commission earners can deduct.

Is Commission Taxed Differently to Salary?

Commission income is taxed using the same SARS progressive tax brackets (18%–45%) as salary. There is no special commission tax rate. What differs is how the tax is calculated each month, and which deductions you are entitled to claim.

The key difference is the Section 11(a) business expense deduction available to commission earners — employees who earn more than 50% of their total remuneration from commission can deduct qualifying work-related expenses in a way that ordinary salaried employees cannot.

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The 50% Commission Test — Who Is a Commission Earner?

SARS defines a commission earner for deduction purposes as an employee whose commission income is more than 50% of their total gross remuneration for the tax year. If you earn R20,000/month in base salary and R25,000/month in commission, commission is 55.6% of your total — you qualify.

If your commission is below 50% of total remuneration, you are treated as an ordinary employee for deduction purposes and cannot deduct commission-related expenses.

What Commission Earners Can Deduct

Commission earners who meet the 50% test can deduct the following expenses from their commission income before calculating tax:

  • Motor vehicle expenses — fuel, maintenance, and wear-and-tear in proportion to business use (logbook required)
  • Home office expenses — a portion of rent/bond interest, electricity, and rates proportional to the home office floor area, if the space is used exclusively and regularly for work
  • Cell phone and data — the business-use portion
  • Professional memberships and subscriptions — relevant to your field
  • Stationery and equipment — used directly to generate commission income

The deduction is claimed on your annual tax return (ITR12), not through payroll. Your employer cannot deduct these through PAYE — they calculate PAYE on gross commission income. You reclaim the benefit when SARS processes your tax return.

How Employers Calculate PAYE on Commission

Commission income is variable, which creates a challenge for monthly PAYE calculation. SARS allows two methods:

Method 1 — Annualisation

The employer multiplies the current month's commission by 12 to estimate annual income, applies the tax tables to that estimate, and divides by 12 to get the monthly PAYE. In months with large commissions, this results in high PAYE deductions; in low months, deductions are lower. This often leads to either over- or under-payment across the year.

Method 2 — Averaging

The employer uses the average commission earned in the current and preceding months of the tax year to project annual income. This smooths out the peaks and troughs of annualisation and often produces more accurate monthly deductions for earners with reasonably consistent commission income.

In either case, the year-end reconciliation on assessment typically results in a refund or additional tax owed. Commission earners should budget for the possibility of a tax shortfall at assessment.

Worked Example — R40,000 Commission Month

A sales consultant earns R10,000 base salary + R40,000 commission this month. Using the annualisation method:

Monthly income: R50,000
Annualised income: R50,000 × 12 = R600,000
Tax on R600,000 (36% bracket): R125,599 + 36% × (R600,000 − R530,200) = R150,727
Less rebate: −R17,820
Annual tax: R132,907
Monthly PAYE: R132,907 ÷ 12 = R11,076

In a low month where total income is R15,000:
Annual estimate: R15,000 × 12 = R180,000 → tax R24,840 → less rebate R17,820 → R7,020/year → monthly PAYE R585

The swings in monthly PAYE can be dramatic. Commission earners need strong cash flow management to avoid a large tax bill at year-end.

Commission and Provisional Tax

If your commission-based employment produces additional income outside your employment (freelance work, rental income, investments), you may also need to register as a provisional taxpayer. A tax practitioner can advise on whether this applies to you.

See also our Bonus Tax Calculator — the tax treatment of variable income such as bonuses follows similar principles to commission.

Reducing Commission Tax — Legal Strategies

  • Maximise retirement fund contributions — RA, pension or provident fund contributions reduce your taxable income by up to 27.5% of remuneration (capped at R430,000). Even modest contributions significantly reduce the marginal rate applied to commission income.
  • Medical aid — the Section 6A credit directly reduces your PAYE regardless of income level.
  • Keep a detailed logbook — motor vehicle deductions for commission earners can be substantial but require a SARS-compliant logbook.
  • Claim home office legitimately — if you work from home to make client calls, prepare proposals or complete administrative work, a proportional home office deduction may apply.

Frequently Asked Questions

Frequently Asked Questions

How is commission income taxed in South Africa?
Commission income is taxed at the same SARS progressive rates as salary — 18% to 45% depending on annual taxable income. There is no special commission rate. Your employer calculates monthly PAYE on commission using an annualisation or averaging method. You may be able to deduct qualifying work expenses on your annual return if commission exceeds 50% of your total remuneration.
What expenses can commission earners deduct in South Africa?
If commission is more than 50% of your total gross remuneration, you may deduct qualifying expenses: vehicle costs (fuel, maintenance, wear-and-tear — logbook required), a proportional home office, cell phone and data for business use, professional memberships, and stationery. Deductions are claimed on your ITR12 annual return — not through payroll.
Why is my PAYE different every month on commission?
Your employer annualises your current month's income to estimate your annual tax, then deducts one-twelfth of that estimate. In high-commission months the estimate is high, producing large PAYE deductions; in low months the estimate drops and PAYE is small. This produces swings month to month. The year-end assessment usually results in a refund or additional tax owed.
Do I need to register as a provisional taxpayer if I earn commission?
Not automatically. If commission is your only source of income and it is taxed through PAYE by your employer, you are generally not required to register as a provisional taxpayer. You become required if you also receive taxable income from other sources (rental income, investments, freelance work) that is not taxed at source. Consult a tax practitioner if in doubt.
Is a car allowance treated differently to commission for tax purposes?
Yes. A car allowance is a travel allowance and is taxed differently — 80% of the allowance is included in your taxable income by your employer (20% if your employer is satisfied you travel more than 80% for business purposes). The actual expenses can then be claimed on assessment against the travel allowance income. This is separate from the general business expense deduction available to commission earners.

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Disclaimer: This article is for informational purposes only. Tax figures are based on SARS 2026/2027 tables. Individual circumstances vary. Consult a registered tax practitioner for advice specific to your situation. Read full disclaimer →