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Thai inflation rises to 2.82% in September on fuel, below forecasts; core stays low

Published Data as of ThailandMacro & households
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Key points

Implications

ExecutivesPlan on headline inflation near the ministry's 1.8–2.2% range for 2026, with fuel prices as the main swing factor for household budgets.
InvestorsLow core inflation of 1.50% limits the case for higher policy rates, but rising headline prices reduce real disposable income for consumer-finance borrowers.
OperatorsRefresh affordability buffers for fuel- and food-heavy household budgets, especially in flood-affected provinces where income disruptions coincide with higher prices.

Facts

Headline: Thailand's consumer price index rose 2.82% 1 year on year in September, up from 2.53% in August, and 0.25% 2 month on month, the Trade Policy and Strategy Office (TPSO) of the Ministry of Commerce reported on 6 October. A Reuters poll had expected 3.06% 3. The reading stays within the Bank of Thailand's target band of 1–3% 4.

Drivers: energy contributed 1.85 pt 5 to the annual rate, more than half of the total, with fresh food (eggs, chicken, vegetables) also rising (The Nation).

Core and year to date: core inflation, which excludes fresh food and energy, was 1.50% 6, up from 1.44% in August. Average headline inflation for January–September was 1.54% 7 and average core inflation 1.01% 8.

Outlook: the ministry narrowed its 2026 headline inflation projection to 1.8–2.2% 9, narrowed from 1.5–2.5%.

Analysis

Over five months, headline inflation has moved from 2.53% 10 in August to 2.82% in September, after easing in July, with fuel the swing factor (chart). Core inflation has stayed far lower, at 1.50%, so the pressure on households is concentrated in fuel and food rather than broad demand.

Thailand's rate remains well below its Mekong neighbours Vietnam and Laos: Vietnam's September CPI rose 5.08% 11 and Laos's 7.8% 12. With the policy rate at 1.00% 13, real rates have narrowed as headline inflation climbed. For lenders, the relevant effect is on cash flow: fuel and food are a large share of spending for lower-income borrowers, who also carry most small-ticket consumer debt.

Headline CPI inflation, year on year (%)
01232.792026-052.422026-061.952026-072.532026-082.822026-09
Headline CPI inflation, year on year (%)
2026-052.79
2026-062.42
2026-071.95
2026-082.53
2026-092.82

Year-on-year change in the headline consumer price index, Ministry of Commerce (TPSO) · Source: Ministry of Commerce (TPSO) monthly CPI releases as reported by Xinhua, Kaohoon International and The Nation (2026-05, 2026-06, 2026-07, 2026-08, 2026-09)

Counterpoints and uncertainties

The September reading came in below the poll forecast, and lower oil prices would bring headline inflation down quickly. Monthly figures swing with temporary fuel and electricity measures, as in July, so a single month says little about the trend. The ministry's range is a projection and may be revised again as food and energy prices evolve.

Key figures

  1. Headline CPI inflation, September 2026: 2.82% (up from 2.53% in August). Year-on-year change in the headline consumer price index, Ministry of Commerce. Thailand, national. Basis date: 30 Sep 2026. Source: The Nation: Fuel and fresh food lift Thai September inflation to 2.82% as 2026 forecast narrows to 1.8–2.2% (2026-10-06)
  2. Headline CPI, month-on-month change, September 2026: 0.25%. Month-on-month change in the headline consumer price index, Ministry of Commerce. Thailand, national. Basis date: 30 Sep 2026. Source: The Nation: Fuel and fresh food lift Thai September inflation to 2.82% as 2026 forecast narrows to 1.8–2.2% (2026-10-06)
  3. Reuters poll forecast for September 2026 headline CPI: 3.06%. Median forecast in a Reuters poll for September year-on-year headline CPI. Thailand, national. Basis date: 6 Oct 2026. Source: Business Recorder (Reuters): Thai September headline CPI rises 2.82% on year, below forecast (2026-10-06)
  4. Bank of Thailand inflation target band: 1–3%. Monetary policy target range for headline inflation. Thailand. Basis date: 6 Oct 2026. Source: Business Recorder (Reuters): Thai September headline CPI rises 2.82% on year, below forecast (2026-10-06)
  5. Energy contribution to headline inflation, September 2026: 1.85 pt. Contribution of energy prices to year-on-year headline CPI inflation, Ministry of Commerce. Thailand, national. Basis date: 30 Sep 2026. Source: The Nation: Fuel and fresh food lift Thai September inflation to 2.82% as 2026 forecast narrows to 1.8–2.2% (2026-10-06)
  6. Core CPI inflation, September 2026: 1.50% (up from 1.44% in August). Year-on-year change in CPI excluding fresh food and energy, Ministry of Commerce. Thailand, national. Basis date: 30 Sep 2026. Source: The Nation: Fuel and fresh food lift Thai September inflation to 2.82% as 2026 forecast narrows to 1.8–2.2% (2026-10-06)
  7. Average headline inflation, January–September 2026: 1.54% (up from 1.37% for January–August). Average year-on-year headline CPI inflation, January–September. Thailand, national. Basis date: 30 Sep 2026. Source: The Nation: Fuel and fresh food lift Thai September inflation to 2.82% as 2026 forecast narrows to 1.8–2.2% (2026-10-06)
  8. Average core inflation, January–September 2026: 1.01%. Average year-on-year core CPI inflation, January–September. Thailand, national. Basis date: 30 Sep 2026. Source: The Nation: Fuel and fresh food lift Thai September inflation to 2.82% as 2026 forecast narrows to 1.8–2.2% (2026-10-06)
  9. Ministry of Commerce 2026 headline inflation outlook (October): 1.8–2.2% (narrowed from 1.5–2.5%). Ministry of Commerce projection range for average 2026 headline inflation. Thailand, national. Basis date: 6 Oct 2026. Source: The Nation: Fuel and fresh food lift Thai September inflation to 2.82% as 2026 forecast narrows to 1.8–2.2% (2026-10-06)
  10. Headline CPI inflation, y/y: 2.53% (up from 1.95% in July)
    Via Xinhua; original not obtained.
    . Year-on-year change in the headline consumer price index, Ministry of Commerce. Nationwide. Basis date: 31 Aug 2026. Source: Xinhua: Thailand's headline inflation quickens to 2.53 pct in August (2026-09-07, citing Ministry of Commerce)
  11. CPI inflation, September 2026: 5.08% (up 0.62% month on month and 4.20% above December 2025). Consumer price index, year on year, NSO. National. Basis date: 30 Sep 2026. Source: VnEconomy: Vietnam's September CPI rises 5.08% (2026-10-03, citing NSO)
  12. CPI inflation, y/y: 7.8% (up from 7.7% in August)
    Released by the Lao Statistics Bureau on 29 September 2026. Xinhua’s report gives 7.8% in its headline and 7.9% in its body text; the Laotian Times gives 7.8%.
    . Year-on-year change in the consumer price index. Nationwide. Basis date: 30 Sep 2026. Source: Laotian Times: Laos inflation rises to 7.8 percent in September as education, utility costs climb (2026-09-29)
  13. Bank of Thailand policy rate: 1.00%
    As reported by ADB.
    . One-day repurchase rate set by the BOT Monetary Policy Committee. Monetary policy. Basis date: 31 Aug 2026. Source: ADB: Developing Southeast Asia, Asian Development Outlook September 2026 (2026-09-23)

Sources

  1. The Nation: Fuel and fresh food lift Thai September inflation to 2.82% as 2026 forecast narrows to 1.8–2.2% (2026-10-06)
  2. Business Recorder (Reuters): Thai September headline CPI rises 2.82% on year, below forecast (2026-10-06)
  3. Xinhua: Thailand's headline inflation up 2.42 pct in June (2026-07-06)
  4. Kaohoon International: Thailand's Inflation Rises 1.95% in July From Fuel and Food Pressures
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A Japanese version of this article is available: 日本語版

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