Most South African companies don’t lose money on tax through poor bookkeeping or non-compliance, but through timing. A wear-and-tear allowance not claimed before an asset purchase falls into the wrong financial year. A provisional tax estimate padded upward “to be safe”, tying up cash that could have been working in the business. A shareholding or trust structure left unchanged for years because restructuring always felt like a project for later.
None of this shows up as an error on the return. It just shows up as a bigger tax bill than necessary.
Most of the decisions that reduce a 2027 tax bill need to happen before the return is prepared. This article covers where South African companies and SMEs commonly leave tax on the table, what the Income Tax Act and related legislation actually allow, and what to do in the second half of 2026, while the current year of assessment is still open.
What Is Tax Optimisation?
Tax optimisation is the lawful structuring of a business’s income, expenses, and transactions to reduce its overall tax liability, within the rules set out in the Income Tax Act 58 of 1962 and administered by the South African Revenue Service (SARS) under the Tax Administration Act 28 of 2011.
Tax optimisation is not the same as tax evasion. Evasion involves misrepresenting income or expenses to SARS, which is a criminal offence. Optimisation involves using the deductions, allowances, exemptions, and structuring options the law already provides, for example, claiming legitimate business expenses, timing capital purchases to make use of wear-and-tear allowances, or choosing an appropriate business structure under the Companies Act 71 of 2008.
For SMEs in particular, optimisation also includes correctly assessing eligibility for Small Business Corporation (SBC) tax rates, where applicable, and making sure provisional tax estimates are accurate enough to avoid underpayment penalties.
Why Planning for 2027 Should Start Now
A tax year of assessment cannot be optimised retroactively. Once a financial year has closed, most of the decisions that reduce a company’s tax bill (how income was structured, which assets were purchased and when, which expenses were incurred and documented) have already been made. Planning ahead of the 2027 year of assessment, rather than during it, gives a business the ability to influence its position before the numbers are fixed.
Several factors make early planning particularly relevant for South African businesses heading into 2027:
- SARS’s data matching. SARS cross-references data from banks, third-party service providers, and other government departments, making unsupported or poorly documented deductions more likely to be queried.
- Provisional tax accuracy. Companies and individuals registered for provisional tax face penalties under the Income Tax Act where estimates fall materially short of actual taxable income, so early forecasting reduces this risk.
- Structural decisions take time. Changes such as restructuring shareholding, setting up a trust for succession purposes under the Trust Property Control Act 57 of 1988, or registering for VAT under the Value-Added Tax Act 89 of 1991 all involve administrative lead time that cannot be compressed into the final weeks of a financial year.
Key Areas Where SA Businesses Can Optimise Their Tax Position
1. Business Structure
The legal form a business takes, for example, sole proprietor, partnership, private company (Pty Ltd), or trust, directly affects its tax treatment. A company incorporated under the Companies Act 71 of 2008 is taxed separately from its owners, while a sole proprietor’s business income is taxed as part of their personal income at marginal rates. For growing SMEs, converting from a sole proprietorship to a private company can, depending on the numbers, reduce the effective tax rate on retained profits. This should be assessed against the business’s specific income and cash flow position, not adopted as a general rule.
2. Provisional Tax Forecasting
Companies and provisional taxpayers submit two (and optionally a third, “top-up”) provisional tax estimates per year of assessment. Underestimating taxable income can trigger penalties; overestimating ties up cash unnecessarily. Reviewing year-to-date performance against the prior estimate, ideally each quarter, allows a business to adjust its provisional tax payments before the next deadline rather than after.
3. Allowable Deductions and Allowances
Common areas where SMEs under-claim include:
- Wear-and-tear allowances on business equipment and vehicles used for trade purposes.
- Home office deductions, where strict SARS criteria for a specifically fitted-out space, used regularly and exclusively for work, are met.
- Bad debt write-offs, where debts have genuinely become irrecoverable, and this is properly documented.
- Legitimate travel, subsistence, and business-related expenses, provided records are kept in line with SARS requirements.
4. VAT Registration and Input Tax Recovery
Businesses that cross, or expect to cross, the compulsory VAT registration threshold under the Value-Added Tax Act 89 of 1991 need to register in good time. Voluntary registration below the threshold can also make sense for businesses with significant input costs, since it allows recovery of VAT paid on qualifying expenses. Getting this wrong in either direction (registering too late or failing to recover input tax correctly) has a direct cash flow impact.
5. Succession and Estate Structuring
For owner-managed businesses, how the business is held matters for tax purposes both now and on eventual transfer. Structures such as trusts, governed by the Trust Property Control Act 57 of 1988, are sometimes used to manage succession and estate duty exposure, but they carry their own compliance and tax obligations and are not appropriate for every business. This is an area where advice specific to the business’s circumstances is needed rather than a template approach.
Practical Implications for Businesses
For a South African company or SME, the practical effect of planning early for 2027 is straightforward: better-documented deductions, more accurate provisional tax payments, and fewer surprises at year-end. Businesses that leave tax planning until the return is due typically lose the ability to make structural changes and miss deductions they cannot retroactively substantiate.
Early planning also gives a business time to correct past-year issues before they compound. If prior returns contain errors, addressing these proactively, including through SARS’s voluntary disclosure processes, where applicable, is generally a better position than waiting for SARS to identify them.
How Secundes Can Help
Secundes works with South African companies and SMEs to review their current tax position, identify where deductions and allowances are being under-claimed, and put a realistic provisional tax and compliance plan in place ahead of the new year of assessment. This includes advice on business structuring, VAT registration decisions, and succession planning where relevant.
Businesses that want a head start on 2027 can view Secundes’s tax advisory services or contact the Secundes team directly to discuss their specific position.
Frequently Asked Questions
1. What does “tax optimisation” mean for a small business in South Africa?
Tax optimisation means legally structuring income, expenses, and business affairs to reduce the overall tax owed, using the deductions and allowances provided for under the Income Tax Act 58 of 1962. It does not involve underreporting income or misstating expenses.
2. When should a company start planning its tax strategy for the next year of assessment?
Ideally at the start of, or partway through, the current financial year. Structural changes, provisional tax forecasting, and documentation of deductions all require lead time to be effective.
3. Do SMEs need to register for VAT?
VAT registration under the Value-Added Tax Act 89 of 1991 is compulsory once a business’s taxable supplies exceed the statutory threshold in a 12-month period. Businesses below the threshold may register voluntarily in certain circumstances. Current thresholds should be confirmed with SARS or a tax advisor, as these are periodically reviewed.
4. What happens if a company underestimates its provisional tax?
Where a provisional tax estimate falls materially below actual taxable income, SARS can impose a penalty under the Income Tax Act. Reviewing forecasts regularly against actual performance reduces this risk.
5. Can a sole proprietor reduce their tax by converting to a private company?
It depends on the business’s income level and profit retention needs. A private company registered under the Companies Act 71 of 2008 is taxed separately from its owners, which can be more efficient for businesses retaining profits in the business, but this should be assessed case by case rather than assumed.
While every reasonable effort is taken to ensure the accuracy and soundness of the contents of this publication, neither writers of articles nor the publisher will bear any responsibility for the consequences of any actions based on information or recommendations contained herein. Our material is for informational purposes.