Mexico Peso Firms to 18.13 Ahead of Inflation Data
Mexico’s peso has eased back from last Thursday’s weakest fixing, and a fresh inflation reading arrives on Thursday. Both feed straight into an expat’s monthly budget.
Key Facts
- The rate Banxico (Mexico’s central bank) determined its FIX exchange rate at 18.1343 pesos per US dollar on Monday 5 October 2026. It was 18.1903 on Friday 2 October and 18.3688 on Thursday 1 October.
- The data Statistics office INEGI publishes September inflation on Thursday 8 October. Annual inflation was 3.42% in the first half of September.
- The policy rate Banxico held its benchmark interest rate at 6.50% on 24 September. Its next decision is Thursday 5 November.
- Why it matters to you If you earn in dollars, each dollar buys slightly fewer pesos than on 1 October. Everyday prices are rising at about 3.4% a year.
- Prediction markets Polymarket prices “no change” at Banxico’s November meeting at 95.0% (US$36,672 traded; 6 October, 00:47 ET). These are bets, not forecasts.
Where the Peso Stands
Banxico determined the FIX at 18.1343 pesos per dollar on Monday 5 October. The FIX is the rate Banxico publishes each business day to settle dollar obligations in Mexico.
The previous two values were 18.1903 on Friday and 18.3688 on Thursday. The gazette (DOF) published 18.1903 on Monday, which is Friday’s value. That is why some news sites show 18.19 for Monday.
At 18.1343, MXN 10,000 is about US$551. At Thursday’s 18.3688 it was about US$544.
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Why Banxico Matters Right Now
Banxico left its interest rate at 6.50% on 24 September, by a unanimous vote. It said its policy does not need to follow US moves mechanically.
The US Federal Reserve raised its range by 0.25 points to 3.75–4.00% on 16 September. A higher US rate usually makes the dollar more attractive, which can weaken the peso. A rate gap between Mexico and the US is one of the forces that guide the exchange rate, not the only one.
Banxico’s next decision is on Thursday 5 November. The Fed meets again on 27 and 28 October.
What the Inflation Data Show
INEGI reported annual inflation of 3.42% for the first half of September, up from 3.26% in the second half of August. The core rate, which leaves out volatile food and energy prices, was 3.79%.
Tomatoes rose 22.79% between half-month readings, and private primary-school fees rose 5.85%, according to El Financiero’s report on the INEGI data. The EODHD economic calendar shows a consensus of 3.47% for the full September figure on Thursday. That is a forecast, not ours.
What This Means for Foreign Residents
Dollar earners. US$2,000 a month is about MXN 36,269 at 18.1343, against about MXN 36,738 at 18.3688. That is about MXN 469 more per month than on 1 October, or about US$26.
Peso earners and savers. If your income is in pesos, a firmer peso makes dollar-priced items such as travel and electronics a little cheaper.
Prices. Inflation near 3.4% means a MXN 20,000 monthly rent would rise by about MXN 680 a year if it followed prices. Your lease terms decide what you pay.
The Other Direction
The peso has gained in the last two fixings, but one day’s move does not make a trend. Banxico said its decision weighed the exchange rate and the absence of demand pressure. Thursday’s inflation reading and the Fed’s decision on 28 October both feed into what comes next.
What Prediction Markets Say
Polymarket prices “no change” at Banxico’s November decision at 95.0%, a 25-point rise at 3.4% and a 25-point cut at 2.1% (US$36,672 traded). A separate Polymarket contract on Mexico’s 2026 annual inflation puts the 4.00% to 4.49% band at 45.5% (US$76,457 traded). Stand: 6 October 2026, 00:47 ET. These prices are bets, not forecasts.
Why we show this: prediction markets turn real-money bets into a live probability that moves within minutes of the news, which is why investors, campaigns and newsrooms in the United States now follow them closely. We show them next to polls and official results, never instead of them.
What Is Not Yet Known
We do not know what INEGI will show for the full month of September. We also do not know whether the peso’s recent gains survive the Fed’s meeting on 28 October.
Sources
- Banco de México, FIX series and DOF publication, 1, 2 and 5 October 2026.
- Banco de México, monetary policy announcement of 24 September 2026, as reported by El Financiero and Expansión.
- INEGI, consumer price index, first half of September 2026 (bulletin 605/26), and its release calendar.
- US Federal Reserve, decision of 16 September 2026.
- Polymarket, Bank of Mexico November decision and Mexico annual inflation 2026 markets, read 6 October 2026, 00:47 ET.
More on Mexico: Mexico hub. Related coverage: today’s LatAm Expat & Nomad Daily Guide, Mexican Peso Gains 0.3% to 18.13 per Dollar on Monday and Brazil’s Dollar Falls 4.6% as Real Rallies After Vote.
Frequently Asked Questions
What is Banxico’s FIX rate today?
The latest FIX, determined on Monday 5 October 2026, is 18.1343 pesos per US dollar. The value published in the gazette (DOF) that day, 18.1903, was Friday’s FIX.
When is Mexico’s next inflation report?
INEGI publishes September inflation on Thursday 8 October 2026. Annual inflation was 3.42% in the first half of September.
Will Banxico change interest rates soon?
Banxico held its rate at 6.50% on 24 September, and its next decision is on Thursday 5 November. Polymarket prices “no change” in November at 95.0%, a bet and not a forecast.
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