Key points
- The Thai Tapioca Starch Association posted premium-grade starch at 22.10 THB/kg on 15 September, down 0.20 THB on the week — the first decline in the 2026 series
- The export quote fell alongside it, from USD 705 to USD 700/tonne FOB Bangkok
- Raw material moved the other way: nationwide factory-gate roots lifted their floor to 3.65 THB/kg at 25% starch, a third consecutive weekly rise
- Vietnamese mills added another USD 5/tonne to starch offers, reaching USD 620-660 FOB Ho Chi Minh City, narrowing the gap with Thailand to USD 40-80/tonne
- The Vietnam Cassava Association described the root prices starch plants have been paying as the highest in its recorded history
A series that changed direction
The Thai Tapioca Starch Association’s weekly table opened 2026 at 14.10 THB/kg on 6 January and climbed through the year.
From the 4 August posting the price settled at 22.30 THB/kg and USD 705/tonne, holding there for six consecutive postings through 8 September.
The 15 September posting is the first time this series has moved down all year.
| Posting date | Domestic (THB/kg) | Export FOB (USD/tonne) |
|---|---|---|
| 21 Jul 2026 | 22.15 | 700 |
| 4 Aug 2026 | 22.30 | 705 |
| 1 Sep 2026 | 22.30 | 705 |
| 8 Sep 2026 | 22.30 | 705 |
| 15 Sep 2026 | 22.10 | 700 |
Source: Thai Tapioca Starch Association, 2026 weekly price table
Raw material heading the other way
In the same week, the Thai Tapioca Trade Association’s table dated 15 September showed fresh roots at 25% starch in a range of 3.65-4.30 THB/kg.
The floor moved up from 3.60 THB a week earlier and 3.50 THB the week before that, while the upper bound stayed put throughout.
The provincial picture matches. The Northeastern Tapioca Trade Association’s announcement of 11 September put 30%-starch roots in Nakhon Ratchasima at 4.00-4.80 THB/kg.
Compared with its 7 September edition, three districts were higher, eight were unchanged, and none moved lower.
| Period | Roots 25%, factory gate (TTTA) | Roots 30%, Korat (NETTA) |
|---|---|---|
| Early September | 3.50-4.30 | 3.75-4.80 |
| Previous week | 3.60-4.30 | 3.90-4.80 |
| Latest | 3.65-4.30 | 4.00-4.80 |
Unit: THB/kg. Source: TTTA (1, 8 and 15 Sep 2026) and NETTA (31 Aug, 7 and 11 Sep 2026)
The northeastern association also reported average plant utilisation below 50% in both its 7 and 11 September announcements.
Vietnam moves up again
The Vietnam Cassava Association’s market bulletin of 14 September put Vietnamese mill offers at USD 620-660/tonne FOB Ho Chi Minh City, up USD 5 on both bounds from the previous week.
That is a second consecutive increase, after the range had held at USD 610-650 across the 17, 24 and 31 August bulletins.
Overland border prices moved more sharply, with DAF Lang Son at CNY 4,100-4,250/tonne, up by 100 to 150 CNY.
The bulletin cites FOB Bangkok at USD 705, which is the 8 September figure. Measured against Thailand’s latest quote of USD 700, the gap between the two origins stands at USD 40-80/tonne.
The reasons the Vietnamese association gives
The association sets out conditions region by region in its own bulletin, reporting that many plants in the Central Highlands would start their new season during that week.
For the north, it says some plants are clearing warehouse space and completing additional equipment installations, planning to begin running in the second half of October 2026.
In the south and Tay Ninh, it points to higher fuel prices in Cambodia and Laos together with tight fuel supply, making it harder to bring fresh roots from Cambodia into Vietnam.
On chips, the association expects supply in the 2026-2027 season to be very tight, because the root prices paid to starch plants have stayed very high — a level it records as the highest in its history.
These statements are the Vietnam Cassava Association’s own assessments as published in its bulletin dated 14 September 2026.
What this set of numbers shows
Starch and raw material moved in opposite directions this week, a picture that reads directly off the figures all three associations publish.
Buyers whose contracts reference an association price should check which posting date their contract is tied to, since each source publishes on a different day with a different set of numbers.
Readers who want every level on one page can follow our weekly cassava price update, and product specifications are on the products page.
ที่มา / Sources:
- Thai Tapioca Starch Association (TTSA), weekly price 15 Sep 2026 and the 2026 historical table - https://www.thaitapiocastarch.org/en/information/statistics/weekly_tapioca_starch_price
- Thai Tapioca Trade Association (TTTA), price table 15 Sep 2026 - https://ttta-tapioca.org/?lang=en
- Northeastern Tapioca Trade Association (NETTA), fresh root buying prices at starch plants, Nakhon Ratchasima, 11 Sep and 7 Sep 2026 - https://www.nettathai.org/2012-02-06-06-49-09.html
- Vietnam Cassava Association, cassava market bulletin 14.09.2026 - http://hiephoisanvietnam.org.vn/chi-tiet-tin/bang-tin-tham-khao-thi-truong-san-ngay-14-09-2026