Mexico’s annual inflation rose to 3.45% in September, up from 3.26% in August. But the central bank’s independence and patient approach to interest rates are keeping the broader price picture steadier than the headline suggests, according to figures the National Institute of Statistics and Geography (INEGI) released Thursday, 8 October. Core inflation, which strips out volatile items, eased from 3.88% to 3.75%.
Both readings came in just below forecasts: 3.47% for headline inflation and 3.79% for core. Consumer prices rose 0.42% from August.
What Drove the Increase
The jump came mostly from the grocery aisle, not from broad-based price pressure. The non-core index, covering more volatile goods, rose 1.20% in September. Fruit and vegetable prices climbed 4.40% on the month and 8.78% from a year earlier. Tomatoes surged 30.25%, onions 23.00%, and household LP gas 3.14%. Tomatoes and onions alone added 0.20 percentage points—nearly half the monthly increase, Expansión reported.
Some prices fell. Potatoes dropped 13.92%, avocados 8.11%, and internet, phone and pay-TV bundles 2.06%. That last decline reflects the sort of price relief competition tends to deliver.
September marked the second straight monthly rise in headline inflation, after 3.12% in July. A year earlier, annual inflation stood at 3.76%. Core inflation has fallen every month since May, when it reached 4.19%, while core prices rose 0.20% in September. Within that index, goods inflation slowed to 3.21% and services inflation to 4.27%, though restaurant and education costs are still rising faster than the headline rate.
Central Bank Discipline
Banco de México (Banxico), the autonomous central bank, targets 3% inflation, with a tolerance of one percentage point on either side. On Thursday, 24 September, it said headline inflation would reach that target in the fourth quarter of 2027.
That same day, the board voted unanimously to keep its overnight rate at 6.50%, marking its third consecutive hold. The last cut came in May. The rate stood at 10.00% at the start of 2025, so policymakers have already eased substantially while keeping real rates positive.
The U.S. Federal Reserve took the opposite path, raising its target range by a quarter point in September to 3.75% to 4.00%. It was the Fed’s first increase since July 2023. Banxico said Mexican monetary policy “would not have to react mechanically” to Fed moves because economic conditions differ between the two countries.
Minutes published Thursday showed that the board isn't of one mind. Three of the five members were open to a rate cut, and one called it a possible one-off. The other two urged caution; one warned Banxico might otherwise have to discuss matching Fed hikes. The minutes didn't identify the members open to a cut, and no one committed to a date. Analysts surveyed by Citi, as cited by Expansión, expected the rate to remain at 6.50% through December.
The Peso Question
Banxico’s FIX reference rate climbed from 16.98 pesos per U.S. dollar on Tuesday, 1 September, to 18.11 on Thursday, 8 October. A dollar bought 6.7% more pesos than on 1 September, but 1.3% fewer than a year earlier. Banxico listed peso depreciation as an upside risk to inflation: a weaker peso makes imported goods, including those from the United States, more expensive for Mexican buyers. How much of the recent slide will feed into prices remains unknown.
At the FIX rate, US$100 converted to about 1,811 pesos. Remittances reached US$5.45 billion in August, 3.6% less than a year earlier. A basket of 170 goods and services tracking minimum living costs for lower-income households rose 3.29% from a year earlier.
Producer prices, published separately that same day, rose 4.05% year over year, signaling higher costs for U.S. companies buying goods made in Mexico.
INEGI didn't explain why tomato and onion prices jumped, so it's unclear whether the increase will reverse in October. Citi's survey, cited by Expansión, had forecast 3.46% headline inflation and 3.78% core inflation.
The Federal Reserve meets on 27 and 28 October. Banxico’s next rate decision is due Thursday, 5 November, at 1 p.m. Mexico City time. INEGI publishes October inflation on Monday, 9 November.
Why This Matters:
September’s data shows inflation well inside Banxico’s tolerance band, while the underlying core measure has fallen every month since May. That’s what an independent central bank, insulated from political pressure to cut rates early, is supposed to deliver. The risks lie elsewhere. A weaker peso raises import costs, producer prices are up 4.05%, and a hawkish Fed narrows Banxico’s room to ease. For U.S. firms sourcing from Mexican suppliers, higher producer prices and a volatile currency pose real budgeting concerns. For Mexican households, especially lower-income ones, food price swings bite hardest. Banxico’s cautious, data-driven approach, rather than a rush to cut, is what keeps those risks from hardening into entrenched inflation.