South African businesses and individuals with income outside PAYE should keep a close eye on provisional tax calculations after the South African Institute of Chartered Accountants (SAICA) raised concerns about uncertainty in the current rules. In a submission dated 7 October 2026, SAICA asked National Treasury to consider clearer rules, safe-harbour relief and more practical penalty treatment for taxpayers whose provisional taxpayer status only becomes apparent after the end of the tax year.

This is a policy proposal, not an enacted change. The current rules remain in force. However, the submission is relevant to small businesses, sole proprietors, landlords and other taxpayers whose income varies during the year.

What SAICA is proposing

SAICA’s submission says some taxpayers may not be able to determine with certainty during the year whether they fall within the provisional taxpayer definition. The final position may depend on actual receipts, deductible expenses, exemptions and thresholds that are only clear once the year has ended.

SAICA specifically proposes that provisional taxpayer status should be based on objective facts that are known or reasonably determinable during the year. It also recommends that taxpayers should not face administrative or understatement-related penalties in a first year where their status only becomes clear after year-end, provided they regularise their position within a reasonable period.

The institute further suggests a safe harbour for people with small, irregular or uncertain non-remuneration income. These proposals appear in SAICA’s submission to National Treasury on the 2027 Budget Review.

Why this matters for business cash flow

Provisional tax is paid ahead of the final assessment. If an estimate is too low, the taxpayer may face a shortfall, interest or penalties. If it is too high, the business may tie up cash that could otherwise support stock purchases, wages or supplier payments.

For a small business, the practical challenge is often not a refusal to comply but the difficulty of forecasting taxable income accurately. Seasonal sales, delayed customer payments, once-off contracts, repair costs and fluctuating operating expenses can all affect the estimate.

SARS guidance confirms that provisional taxpayers must estimate taxable income and that the Commissioner may ask a taxpayer to justify an estimate. If SARS is not satisfied, the estimate may be increased and the increase is generally not subject to objection or appeal. Businesses should therefore retain clear working papers supporting their calculation.

What businesses should check now

  • Reconcile year-to-date income: Compare accounting records, bank receipts and invoices issued.
  • Review deductible costs: Separate business expenditure from private or capital items and retain supporting documents.
  • Update the forecast: Include known changes in sales, margins, payroll, finance costs and major purchases.
  • Document assumptions: Record why the estimate was reasonable when submitted.
  • Check payment timing: Confirm the applicable provisional tax period and avoid leaving payment arrangements until the deadline.

Practical next steps

Businesses should not wait for the proposed policy changes before improving their provisional tax process. A monthly management-accounting review can identify whether profit is tracking above or below the original estimate and help owners plan cash requirements earlier.

SAICA’s recommendations may lead to future legislative or administrative changes, but no such change should be assumed until formally enacted or issued by the relevant authority. For help with forecasting, tax calculations and accounting controls, businesses can review Your Financial Partner’s accounting and advisory services.