Tax deductions for small businesses in South Africa: what you can actually claim.

The South African Income Tax Act is long and complex, but the core principle for deductions is simple: expenses incurred in the production of income are deductible, provided they are not of a capital nature and not specifically prohibited. Everything else is a detail.

Here's what that looks like in practice for owner-managed businesses.

Ordinary business expenses

The most straightforward deductions are expenses you incur directly in running the business:

Staff costs: Salaries, wages, bonuses, and the employer's portion of UIF. Also skills development levies (SDL) paid to SARS, and costs of employee benefits directly connected to employment.

Rent and premises: Rental on office, retail, or industrial space. Also utility costs — electricity, water, rates — when paid directly by the business.

Professional services: Accounting, legal, consulting, and advisory fees directly related to the business. SARS scrutinises "management fees" paid between connected persons, so the arm's length principle matters here.

Marketing and advertising: Direct costs of acquiring customers — digital advertising, print, sponsorships, website costs, and the like.

Vehicle expenses: Where a vehicle is used for business purposes, a portion of the expenses is deductible. The claim must be based on a logbook showing business vs private kilometres. Without a logbook, SARS will disallow the claim. The logbook requirement is non-negotiable.

Home office: If you run your business from home and have a dedicated workspace used exclusively for business, a portion of home costs — bond interest, rates, electricity, and security — is deductible. The calculation is based on the floor area of the workspace divided by total floor area. "Exclusively for business" is the operative phrase; a desk in the corner of the bedroom doesn't qualify.

Travel and subsistence: Actual business travel at the SARS prescribed rate per kilometre (updated annually in the Budget). Subsistence claims for trips away from your usual place of work.

Capital allowances

Expenditure on fixed assets (plant, machinery, equipment, vehicles) is generally not fully deductible in the year of purchase — it's claimed over the asset's useful life via allowances. These vary by asset type:

• General machinery and plant: 40% in year 1, 20% in years 2 and 3, and 20% in year 4 (under Section 12C for manufacturing) or 33.3% per year straight-line for most other assets.
• Computer equipment: SARS generally allows accelerated write-off for IT equipment.
• Small business assets: Companies that qualify under the Small Business Corporation (SBC) provisions can claim enhanced first-year write-offs.

The rules here are detailed and asset-specific. Getting the allowance category wrong means either under-claiming (leaving deductions on the table for years) or over-claiming (which creates a tax liability and potential penalties).

Retirement fund contributions

For business owners who take a salary, contributions to an approved pension fund, provident fund, or retirement annuity are deductible up to 27.5% of the greater of remuneration or taxable income, capped at R350,000 per year. This is one of the most powerful legal tax reduction tools available.

The contribution must be to a SARS-approved fund. Contributions above the cap are carried forward to future years — they're not lost.

Interest expense

Interest paid on borrowings used to produce income is deductible. The borrowing must be connected to the income-producing activities of the business — a loan to buy business equipment qualifies; a loan to fund personal expenses doesn't.

SARS has thin capitalisation rules for related-party loans that can restrict deductibility in some structures. If your company has borrowed money from a shareholder or related company, the deductibility needs to be reviewed.

What you can't claim

Some expenses are specifically prohibited under the Act, regardless of how legitimate they seem:

• Fines and penalties: SARS penalties, traffic fines, regulatory fines — none are deductible.
• Domestic or private expenses: Anything personal — school fees, home improvements outside the home office rules, personal insurance — is not deductible even if paid through the business account.
• Entertainment above the threshold: Business entertainment is deductible subject to a prescribed limit and only where it meets the business purpose test. Lavish client entertainment without clear business purpose is risky.

The real opportunity: proactive planning

The difference between a business that pays the right amount of tax and one that overpays is usually not about knowing an obscure deduction. It's about timing and structure: incurring deductible expenses in the right year, structuring your remuneration to use the retirement fund deduction fully, ensuring your vehicle logbook is complete, and reviewing your position before year-end rather than after.

Tax planning done at year-end is too late. By then, the decisions that could have reduced your liability are already made. We review every client's tax position quarterly — so that when year-end arrives, the planning is already done. This is how we approach tax under both our Peace of Mind and Confident Decisions services. Related reading: how to pay yourself as a SA business owner.