NovThailand News
Thailand fuel prices climbed 1.70 baht per litre in one week
What changed on 12 and 19 August
Bangchak's historical price series shows regular diesel at 36.69 baht per litre on 6 August, 37.54 from 12 August and 38.39 from 19 August. Gasohol 95 moved from 35.99 to 36.84 and then 37.69 baht per litre over the same dates. Gasohol 91 rose from 35.62 to 36.47 and 37.32 baht, while E20 went from 30.99 to 31.84 and 32.69 baht.
For these common grades, each of the two increases was 0.85 baht per litre. Premium fuels did not all follow the same pattern, so the 1.70-baht cumulative increase should not be applied to every product on the price board.
For a simple household example, a 40-litre fill would cost about 68 baht more after a 1.70-baht-per-litre increase than it did before the first August rise. That is only an illustration of the pump-price difference, not a full estimate of monthly motoring costs.
September increases have already overtaken the August figures
The 19 August prices did not remain the latest benchmark. Bangchak's historical data records additional changes on 2, 9 and 15 September. By 15 September, its regular diesel price was 40.69 baht per litre and Gasohol 95 was 39.94 baht.
That means the 19 August figures — 38.39 baht for regular diesel and 37.69 baht for Gasohol 95 — are useful for understanding the August event, but not as today's pump prices. From 6 August to 15 September, regular diesel had increased by 4.00 baht per litre and Gasohol 95 by 3.95 baht. On a 40-litre fill, those differences work out to about 160 baht and 158 baht respectively.
Published benchmark prices apply to Bangkok and nearby provinces and may not match the amount charged at a particular station elsewhere in Thailand. Energy price tables also note that quoted standard retail prices may exclude local maintenance tax.
What it means for day-to-day spending
For someone who drives every day, the important point is not just a single 0.85-baht adjustment but the sequence of increases over a short period. A transport budget based on early-August prices should therefore be refreshed using the current price of the fuel grade the vehicle actually uses.
The direct effect will be smaller for households that rely mainly on rail or other public transport. Higher fuel prices also add cost pressure for taxis, delivery services and businesses running their own vehicles, but that does not mean every fare or service charge rises by the same amount or immediately.
For renters or property buyers, the fuel increase is not evidence that rents or home prices will rise. Its clearer relevance is to the recurring cost of living in locations where daily life involves long drives or heavy car use.
Sources
- Bangchak Corporation — Historical Retail Oil Prices — prices from 6 August to 15 September 2026.
- Energy Policy and Planning Office — retail oil price structure — 19 August 2026.
- Thairath — fuel price increase effective 12 August 2026 — 11 August 2026.
- Thairath — fuel price increase effective 19 August 2026 — 18 August 2026.
- Thairath — fuel prices on 15 September 2026 — 15 September 2026.