Halo or noose?
Treasury's February numbers assumed 1.6% growth, and the economy shrank in the second quarter. At the MTBPS, the design of the new fiscal anchor decides whether discipline turns out to be a halo or a noose.
−0.2%. That was South Africa's second-quarter GDP figure, the first contraction after six quarters of growth. It came on top of a fiscal framework that in February assumed 1.6% growth for 2026. Finance Minister Enoch Godongwana tables the Medium-Term Budget Policy Statement on Wednesday 21 October. The question is whether that framework can bend without breaking. It can, if the new fiscal anchor is designed well.
The framing comes from Raymond Parsons and Waldo Krugell, writing in Business Day on 10 September. They ask whether Treasury can keep its credibility while the economy grows "more tardily than previously envisaged". Their answer is "probably yes", because revenue is holding up and spending is contained. Their warning: "a halo only has to fall a few centimetres to become a noose."
What discipline has bought
The halo is real. The main budget moved into a primary surplus (revenue above non-interest spending) in 2023/24, the first since the 2008 financial crisis. On 14 September, Treasury Director-General Duncan Pieterse told investors that this year's surplus is tracking about R131 billion, with collections ahead of budget on strong corporate tax. In November 2025 S&P gave South Africa its first upgrade from a major agency in 16 years, a month after the country left the FATF grey list.
This is the path from the February Budget Review that the MTBPS now has to defend:
| % of GDP | 2025/26 | 2026/27 | 2028/29 |
|---|---|---|---|
| Main-budget primary surplus | 0.9 | 1.6 | 2.3 |
| Consolidated deficit | 4.5 | 4.0 | 3.1 |
| Gross loan debt | 78.9 | 77.3 | 76.5 |
Debt stabilises in 2025/26 for the first time since 2008, and interest falls from 21.3% of revenue to 20.2% by 2028/29. Even so, interest this year is budgeted at R432 billion, against R310 billion for health.
What has changed since February
Parsons and Krugell think growth of about 1.2% is more plausible for 2026 than Treasury's 1.6%. On 23 September the Reserve Bank's Monetary Policy Committee unanimously raised the repo rate to 7.25%, with August inflation at 4.4%, above the new 3% target. Monetary policy can't ease the squeeze, so any extra growth has to come from delivering reforms.
None of this breaks the arithmetic, but it narrows the margin. With debt near 79% of GDP, each percentage point of slower nominal growth adds roughly 0.8 points to the debt ratio within a year. That's the debt arithmetic set out in Chapter 2 of the textbook.
Four things to watch on 21 October
1. How the anchor is designed. Pieterse says the legislation is drafted and that Treasury prefers "the principle of fiscal sustainability" to a hard numerical rule. Under the Budget Review's proposal, each new administration would table a medium-term fiscal plan. This is the halo-or-noose choice in miniature. A principle with teeth would lock in the gains without forcing cuts in a bad year: a published plan, independent checking, and a defined escape clause for genuine shocks. A vague principle lets the halo slip. A rigid number in a 1%-growth economy is the noose. Chapter 2 reaches the same view from Chile's and Colombia's rules: credible targets with clear escape clauses.
2. Growth, shown honestly. A credible downgrade that still stabilises debt is worth more than a heroic assumption nobody believes. Watch whether Treasury shows how lower growth changes revenue and debt.
3. Infrastructure and municipalities. Treasury's first sovereign infrastructure bond raised R11.8 billion in December 2025. Money is no longer the binding constraint. The pipeline is: in 2025/26 the Budget Facility for Infrastructure accepted 10 of 42 projects submitted in its first three windows. That makes the Tier 1 reform in Chapter 3, "accelerate the PPP framework for infrastructure", the one to watch. The MTBPS can either speed up project preparation or show that it is still stuck. SA Policy Space tracks it as PPP and infrastructure financing reform. Municipalities are the other half. In June the Minister withheld equitable-share transfers from 69 municipalities for mismanagement, and released them at the end of July. Watch whether that becomes a rule-based system or stays a one-off.
4. The wage bill and bracket creep. The Early Retirement Programme has approved 7,687 applications, for an estimated net saving of R5.5 billion over three years. February also adjusted tax brackets for inflation for the first time since 2023/24. Watch whether both hold in a tighter year, with municipal elections on 4 November as the backdrop.
Which one wins
The arithmetic of debt stabilisation is in hand. What is still open is whether the rule written into law protects that work through the next downturn and the next election, without turning a slow year into a forced cut. The test on 21 October is specific: a principle that binds, an escape clause that is defined in advance, and a growth path the numbers can carry. Parsons and Krugell want the budget to back the Reserve Bank governor's call for "uncomfortable structural risks" to lift growth. For Treasury, that means reforming what it spends rather than spending more: projects chosen for their return, municipalities that can bill and maintain, and a wage bill that buys skills. Get the design right, and South Africa keeps its halo.