Borrowing costs in Brazil were supposed to keep falling this year. That story is now getting shorter, and an oil shock is the reason.

Brazil's Finance Ministry revised its 2026 inflation forecast sharply upward on Monday, to 4.5% from the 3.7% it projected just two months ago. The culprit is the Middle East conflict and what it has done to global oil prices. The ministry's average oil price estimate for this year has climbed 25% since March, to $91.25 per barrel. That single number is enough to push inflation to the outer edge of the central bank's acceptable range, which is centered at 3% and allows up to 1.5 percentage points of deviation in either direction.

The consequence for Brazilian households and businesses is straightforward: the rate-cut cycle that started in March will now be shallower. The government now expects Brazil's benchmark lending rate, the Selic, to end 2026 at 13%, not 12% as previously forecast. The Selic currently sits at 14.5%, after two cuts of 0.25 percentage points each. Fewer cuts means credit stays expensive for longer. Mortgages, auto loans, business financing: all of it costs more when the benchmark rate stays elevated.

The market is even more cautious

The government's revised forecast is actually the optimistic take. Economists surveyed weekly by Brazil's central bank have raised their inflation estimate for ten consecutive weeks. Their current median sits at 4.92%, and they expect the Selic to end the year at 13.25%, higher than the government's own projection. The gap matters because private lenders and bond markets price off what economists expect, not what the government hopes for.

Brazil's Finance Ministry did note that President Luiz Inácio Lula da Silva's government has taken steps to limit how much higher global fuel prices bleed into what Brazilians pay at the pump and in energy bills. A stronger currency by year-end is also expected to provide some cushion. But those factors were not enough to offset a 25% jump in the ministry's oil price assumption in just two months.

The government kept its economic growth forecast unchanged at 2.3% for this year, though it flagged an expected slowdown in the second and third quarters before a modest pickup at year-end. The economists surveyed by the central bank are more skeptical, putting growth closer to 1.85%.

This is not a Brazil-only problem

The same pressure is landing elsewhere. Australia's central bank raised its benchmark rate to 4.35% this month, reversing all of the cuts it made in 2025, partly over fears that rising oil costs would feed quickly into consumer prices. Sarah Hunter, an assistant governor at the Reserve Bank of Australia, said in a speech on Tuesday that "higher oil prices mean higher costs and higher consumer prices in the near term, that is a given." She added that Australia's already-strained domestic economy makes the pass-through faster and more extensive than it might otherwise be.

Brent crude futures were trading above $110 a barrel as of Monday, with the Strait of Hormuz still closed due to the conflict. If oil stays at these levels or climbs further, the pressure on central banks to hold rates higher for longer will intensify across multiple economies at once.

That is the broader pattern worth watching. Oil shocks do not just raise fuel prices. They push up the cost of producing and shipping almost everything, they force central banks to slow or reverse rate cuts, and they leave households and businesses facing tighter credit at exactly the moment when economic growth is already under pressure. The immediate news is Brazil's revised forecast. The systemic story is that a single geopolitical disruption in one region is now quietly tightening financial conditions from São Paulo to Sydney.