When 5% Inflation Doesn't Tell the Whole Story

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South Africa's headline inflation rate increased to 5.0% in June 2026, but for many businesses the impact of inflation is far greater than the headline figure suggests.

While consumers often focus on the overall inflation rate, accountants and business advisers know that different sectors experience inflation very differently. For businesses that rely heavily on diesel, transport or logistics, rising operating costs may be significantly higher than the national average.

Inflation Reaches a Two-Year High

According to Statistics South Africa, the Consumer Price Index (CPI) increased from 4.5% in May to 5.0% in June 2026, the highest annual inflation rate since June 2024. Prices increased by 0.7% between May and June.

The largest contributor to the increase was transport. Annual transport inflation rose to 12.7%, while fuel prices increased by 34.3% over the past year.

Within the fuel category, the increases differed considerably:

• Diesel prices increased by 50.8%

• Petrol prices increased by 31.7%

Meanwhile, core inflation, which excludes food and fuel, increased to 4.1%, suggesting that inflationary pressures are becoming more broad-based. Food inflation remained comparatively low at 1.6%.

Why Diesel Prices Matters More Than the Headline Rate

For many businesses, diesel is not simply another expense, it is a core operating cost.

Transport companies, construction firms, agricultural businesses, mining contractors and plant hire companies all depend heavily on diesel to keep equipment and vehicles operating. A business that spends a significant proportion of its operating budget on diesel is likely to experience overall cost pressures that are substantially higher than those suggested by the headline inflation rate.

Clients who entered into fixed-price contracts during 2025 may now find that their operating costs have increased far beyond what they originally budgeted for, placing pressure on profitability.

Review Pricing and Contracts

The latest inflation figures also provide a timely reminder to review contracts that include inflation-linked escalation clauses. Many commercial agreements, including leases, service contracts, maintenance agreements and management fee arrangements, provide for annual increases based on CPI. However, these clauses do not always reference the same inflation measure.

Some contracts refer to:

• the CPI published immediately before the anniversary date;

• CPI for a specified month;

• the average annual CPI; or

• another agreed inflation measure.

Since annual CPI increased from 3.1% in March 2026 to 5.0% in June 2026, the timing specified in the contract could materially affect the annual adjustment.

For example, on a R2 million annual contract, the difference between applying a 3.1% increase and a 5.0% increase amounts to R38,000.

Understanding exactly how escalation clauses operate can therefore have a meaningful financial impact.

Practical Steps for Accountants

Now is an ideal time to help clients assess how rising costs are affecting their businesses. Consider reviewing:

• fuel costs as a percentage of turnover over the past 12 months;

• gross profit margins on fixed-price contracts;

• contracts containing CPI-linked escalation clauses;

• whether selling prices still reflect current operating costs; and

• the business's cash flow forecasts if fuel prices remain elevated.

These discussions can help clients identify pricing pressures before they significantly affect profitability.

Don't Forget Your Own Practice

The same principles apply to accounting practices. If your firm's fees have increased by less than your own operating costs, inflation may be quietly eroding profitability. Reviewing fee structures regularly helps ensure that your practice remains sustainable while continuing to deliver quality professional services.

Why This Matters

Headline inflation provides an important snapshot of the economy, but it does not tell every client's story. By looking beyond the national CPI and understanding which costs are driving each client's business, accountants can provide more meaningful advice on pricing, budgeting, contract management and profitability. In many cases, the greatest value lies not in explaining the inflation figures themselves, but in helping clients understand what those figures mean for their business.

Read the full document issued by Statistics South Africa on the Consumer Price Index, June 2026 here.