Western Thailand's Five Provinces: Business Economy 2026
In short
Western Thailand's five provinces hold 48,086 registered companies as of 17 July 2026. Together they report 875.48 billion baht of revenue, which is 1.09 percent of the national total. The region has 2.42 percent of the nation's companies, so each firm books less than half the national average. Ratchaburi alone produces 42.7 percent of the regional revenue. Prachuap Khiri Khan has the most companies but the lowest revenue per company.
How big is the western Thai economy?
Small, and lopsided. Kanchanaburi, Tak, Ratchaburi, Phetchaburi and Prachuap Khiri Khan hold 48,086 registered companies (DBD, 2026). That is 2.42 percent of the 1,989,709 companies in the national register. Their combined revenue is 875.48 billion baht. That is only 1.09 percent of the 80.15 trillion baht reported nationwide. The gap between those two shares tells the story. The west has plenty of firms and few big ones. The average western company books 18.21 million baht, against 40.28 million baht for the country as a whole, a ratio of 0.45.
Revenue by western province
- Ratchaburi374
- Kanchanaburi161
- Tak129
- Prachuap Khiri Khan120
- Phetchaburi92
Figures in billion baht of reported revenue.
Ratchaburi out-earns Prachuap Khiri Khan more than three to one, even though Prachuap has more registered companies.
Five provinces against the national average
| Province | Companies | Revenue, billion baht | Revenue per company, million baht | Index vs national |
|---|---|---|---|---|
| Ratchaburi | 11,932 | 374 | 31 | 1 |
| Kanchanaburi | 10,010 | 161 | 16 | 0 |
| Tak | 6,239 | 129 | 21 | 1 |
| Prachuap Khiri Khan | 13,177 | 120 | 9 | 0 |
| Phetchaburi | 6,728 | 92 | 14 | 0 |
| Western region total | 48,086 | 875 | 18 | 0 |
| Thailand | 1,989,709 | 80,146.50 | 40 | 1 |
Companies, revenue and revenue per company, as of 17 Jul 2026. Index is revenue per company divided by the national figure of 40.28 million baht.
Ratchaburi is the engine, Prachuap is the crowd
Ratchaburi holds 24.8 percent of the western companies. It books 42.7 percent of the regional revenue. Its 31.30 million baht per company is the only figure in the region that comes close to the national average, at 0.78 of it. Tak follows at 20.74 million baht, then Kanchanaburi at 16.10 million and Phetchaburi at 13.63 million. Prachuap Khiri Khan is the opposite case. It has 13,177 companies, 27.4 percent of the region. Yet its revenue per company is 9.09 million baht, about a quarter of the national figure. The registry cannot say why, but a long coastline of many small firms would produce exactly this pattern.
Why this matters
Western Thailand sits between Bangkok and the Andaman coast, and it is easy to treat it as a corridor rather than a market. The numbers disagree for Ratchaburi and agree for the other four. A business planner who averages the five provinces will be wrong about all of them. Ratchaburi behaves like a mid-sized industrial economy. Prachuap Khiri Khan behaves like a dense network of micro firms. Anyone selling to the west, lending to it or opening a branch there should size each province on its own, and should read company counts and revenue side by side. Count alone would rank Prachuap first. Revenue puts it last in the region.
Definitions
- Revenue per company
- Total reported revenue of a province divided by its number of registered companies.
- Index vs national
- A province's revenue per company divided by the national revenue per company. A value of 0.50 means half the national average.
- Registered company
- A juristic person listed in the DBD registry, whether or not it filed a financial statement.
- Aggregate
- A total across all companies in a group, not an average of individual firm results.
Assumptions
- Revenue includes only companies that filed a financial statement, while the company count includes all registered entities.
- Provinces are assigned by registered address, so a firm operating in several provinces is counted once, at its registered location.
- Revenue is a size measure, not profit, and says nothing about margins.
Methodology
Company counts and total reported revenue per province come from the Department of Business Development registry, aggregated by registered province, as of 17 July 2026. Revenue covers only companies that filed a financial statement, while company counts include every registered entity, so revenue per company is a conservative figure. National figures come from the same registry on the same date. Western Thailand here means the five provinces of the official western region. Shares and ratios were recomputed from the raw values and rounded to two decimals.
How we verified this
- Company counts summed: 13,177 + 11,932 + 10,010 + 6,728 + 6,239 = 48,086.
- Revenue summed: 119.72 + 373.51 + 161.12 + 91.72 + 129.42 = 875.48 billion baht, from raw total 875,481,578,858 baht.
- Company share: 48,086 / 1,989,709 = 2.42 percent. Revenue share: 875.48 / 80,146.50 = 1.09 percent.
- Regional revenue per company: 875,481,578,858 / 48,086 = 18.21 million baht. National: 80,146,498,562,464 / 1,989,709 = 40.28 million baht. Ratio 0.45.
- Ratchaburi: 11,932 / 48,086 = 24.8 percent of companies and 373.51 / 875.48 = 42.7 percent of revenue. Per company 373.51 billion / 11,932 = 31.30 million baht, index 0.78.
- Prachuap Khiri Khan: 13,177 / 48,086 = 27.4 percent of companies, 119.72 billion / 13,177 = 9.09 million baht, index 0.23. Ratchaburi revenue divided by Prachuap revenue is 3.12.
- Province computed_at and national computed_at both equal 2026-07-17, so the data as-of date is 17 July 2026, newer than the 7 July anchors in the data guide. The national total of 1,989,709 companies is unchanged.
References
- Department of Business Development. (2026). Registered juristic persons and financial statement aggregates by province. Ministry of Commerce, Thailand. https://www.dbd.go.th/
Frequently asked questions
Which western Thai province has the most companies?
Prachuap Khiri Khan, with 13,177 registered companies as of 17 July 2026, followed by Ratchaburi with 11,932.
Which western province earns the most revenue?
Ratchaburi, with 373.51 billion baht, or 42.7 percent of the regional total.
How does western Thailand compare with the national average?
Its companies average 18.21 million baht of revenue each, against 40.28 million baht nationally, a ratio of 0.45.
Which provinces make up Western Thailand?
Kanchanaburi, Tak, Ratchaburi, Phetchaburi and Prachuap Khiri Khan.
Cite this page
Chatpong L. (2026). Western Thailand's Five Provinces: Business Economy 2026. Max Data Insights. https://maxdatathailand.com/insights/western-thailand-five-provinces-business-economy-2026
Data & corrections
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Written by
Chatpong L.Founder, Max Data, Max Solutions Co., Ltd.
Chatpong L. leads Max Data, a company-intelligence platform built on Thailand's official business registry. He writes about the structure of the Thai economy using primary registry data. His work covers company formation, industry concentration, and regional business activity.
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This page reports company-level and aggregate statistics only. It names no individuals and makes no claims about any person. Figures are provided for information and may be revised as source data updates.