Eighteen years ago, South Africa’s public debt sat at 23.6% of GDP, ballooning to 78.9% at its peak. Debt-service costs consumed roughly 21 cents of every rand the government collected, making interest payments the biggest non-discretionary drain on the fiscus, exceeding what we spent on health, basic education, or social protection individually.
But several things fell in South Africa’s favour in recent years. The Government of National Unity calmed the political temperature. Load shedding ended. A commodity rally lifted mining taxes. SARS collected more aggressively. By February 2026, the main budget deficit had narrowed to 4.5% of GDP, Treasury was running a primary surplus for the first time in years, and S&P Global had upgraded the credit rating, the first since 2005. A planned VAT increase was scrapped after tax revenue beat expectations by R21.3 billion. Foreign buyers purchased a net R72.4 billion in government bonds. And the rand strengthened 13%, its best year since 2009.
For the first time in a generation, investors are finally buying into a realistic fiscal turnaround.
Then the Strait of Hormuz closed, rewriting the near-term outlook for economies around the world.
Brent crude has surged past $126 a barrel, up from around $70 in late 2025. Since South Africa imports nearly all its oil and fertiliser, higher energy costs feed directly into transport, food prices, and what SARS can collect. Inflation isforecast to hit 4.5% by April due to steep fuel price hikes. While the SARB held rates at 6.75% on 27 March, it has shelved any prospect of cuts anytime soon.
The 10-year bond yield has now spiked back above 9% — up over 100 basis points since the February Budget — forcing Treasury to pay a crisis premium on new debt weeks after it promised borrowing costs were coming down. The rand has weakened from R15.87 to over R17 to the dollar. Foreign investors pulled R41.3 billion out of government bonds in a single week, the largest outflow since at least 2019.
The weak link exposed
Growth – or the lack of it – was the problem long before the Middle East crisis. GDP is projected at 1.4% this year, averaging 1.8% over the medium term, which is half the 3% needed to dent unemployment. The oil shock is magnifying that weakness, compressing growth while pushing up the cost of everything the state buys and subsidises.
The survival of these fiscal gains rests squarely on the Treasury. By forging a “fiscal anchor”, which is a set of binding rules, Treasury wants to mandate a strict path of debt reduction.
The proposal, expected at the Mid-Term Budget Policy Statement later this year, would require each new administration to publish a medium-term debt reduction strategy subject to independent oversight. The IMF expects legislated caps: 70% debt-to-GDP by the early 2030s, 60% long-term. Instead, Treasury has opted for a principles-based framework, which is a broad guideline. But rating agencies and foreign bond buyers take their cues from the IMF. If the fund considers the fiscal framework too loose, it will reflect in the yield South Africa pays to borrow.
Many countries struggle for years with crippling debt; Jamaica was one of the first to turn things around. Its legislated fiscal rules, backed by an independent commission, halved its debt-to-GDP ratio from 144% to 72% in a decade. Colombia regained investment grade the same year it legislated a structural balance rule in 2011, then got downgraded back to junk in 2025. Brazil’s 2000 Fiscal Responsibility Law drove primary surpluses above 4% of GDP, until it abandoned its fiscal rules and debt nearly doubled. Fiscal rules only work when they have teeth, not when governments find ways around them.
If the anchor is legislated with genuine independence, it changes the investment case structurally, but the devil’s in the details: it needs to define escape clauses, whether there’s oversight with real authority, and whether it binds future governments.
The ceiling problem
Even if the fiscal anchor works perfectly, there’s a structural limit to what SA assets can return. Before the oil shock, South African bonds offered real yields above 9% with inflation at 3%. If inflation reaches 4.5% and yields stay near 9%, real returns are only around 4.5%, which is still attractive globally, but no longer as attractive as they were in January.
The rally of the past two years was built on a credible fiscal trajectory, not because the debt crisis had been resolved. Whether it survives depends on four things: the MTBPS fiscal anchor proposal, whether the primary surplus hits 1.9% by 2027/28, rating actions from Fitch and Moody’s, and how long Hormuz stays closed.
Written by Harry Scherzer, CEO of Future Forex