Thailand's Top 5 Provinces Hold 80% of Company Revenue, 2026
In short
Thailand's top five provinces by revenue, Bangkok, Samut Prakan, Chon Buri, Rayong and Pathum Thani, generate 80.5 percent of the country's 80.15 trillion baht in reported company revenue as of 7 Jul 2026. Ranked instead by company count, a different top five holds only 61.4 percent of registered companies. Bangkok alone produces 63.1 percent of national revenue. Rayong ranks tenth by company count but fourth by revenue, driven by heavy industry. Money concentrates in Thailand's provinces far more tightly than company headcount does.
What share of Thailand's company revenue sits in five provinces?
Rank Thailand's provinces by reported company revenue and the answer is stark. Bangkok, Samut Prakan, Chon Buri, Rayong and Pathum Thani together hold 80.5 percent of the country's 80.15 trillion baht in total reported revenue, as of 7 Jul 2026, according to the DBD registry (DBD, 2026). Those same five provinces hold only 57.9 percent of the country's registered companies. Rank the provinces instead by how many companies they host and a different top five appears: Bangkok, Chon Buri, Nonthaburi, Samut Prakan and Pathum Thani, covering 61.4 percent of registered companies but only 78.5 percent of revenue. Either way, money clusters harder than headcount. Bangkok alone generates 50.55 trillion baht, 63.1 percent of national revenue and 78.4 percent of the top five revenue total by itself.
Reported company revenue by province, 2026
- Bangkok51
- Samut Prakan5
- Chon Buri4
- Rayong3
- Pathum Thani2
- Rest of Thailand, 72 provinces16
Figures in trillion baht in reported revenue.
The other 72 provinces combined still report less revenue than Bangkok alone by more than three to one.
Top five provinces by reported revenue
| Province | Companies | Revenue, trillion baht | Share of national revenue | Avg revenue per company, million baht |
|---|---|---|---|---|
| Bangkok | 812,799 | 50.55 | 63.1% | 62.2 |
| Samut Prakan | 97,609 | 4.83 | 6.0% | 49.4 |
| Chon Buri | 127,023 | 3.81 | 4.8% | 30.0 |
| Rayong | 33,083 | 3.20 | 4.0% | 96.8 |
| Pathum Thani | 81,256 | 2.10 | 2.6% | 25.8 |
| Top 5 combined | 1,151,770 | 64.48 | 80.5% | 56.0 |
| Rest of Thailand, 72 provinces | 837,939 | 15.67 | 19.5% | 18.7 |
Company counts, revenue and revenue per company as of 7 Jul 2026.
Two rankings, two different lists
| Rank | Province, by company count | Companies | Province, by revenue | Revenue, trillion baht |
|---|---|---|---|---|
| 1 | Bangkok | 812,799 | Bangkok | 51 |
| 2 | Chon Buri | 127,023 | Samut Prakan | 5 |
| 3 | Nonthaburi | 102,370 | Chon Buri | 4 |
| 4 | Samut Prakan | 97,609 | Rayong | 3 |
| 5 | Pathum Thani | 81,256 | Pathum Thani | 2 |
The top five provinces by company count are not the top five by revenue.
Rayong breaks into the money list, not the headcount list
Rayong ranks only tenth in Thailand for sheer number of registered companies, with 33,083 against Chiang Mai's 65,164. Yet Rayong outproduces Chiang Mai in revenue by 6.06 times, reporting 3.20 trillion baht against Chiang Mai's 528.6 billion baht. Rayong's base of heavy petrochemical and industrial firms means fewer companies that are each far larger. Swap Nonthaburi for Rayong in a top five list and the revenue share climbs from 78.5 percent to 80.5 percent, while the company share falls from 61.4 percent to 57.9 percent. A handful of industrial giants can outweigh tens of thousands of small registered firms.
Why this matters
Thailand's national accounts show a similarly lopsided geography. NESDC's gross regional product data put the Bangkok metropolitan region at roughly half of national GDP in the most recent fiscal year measured (NESDC, 2024). The DBD company registry shows an even sharper tilt when measured by reported revenue: the top five provinces by revenue hold 80.5 percent of the total, well above their 57.9 percent share of company count. That gap has practical consequences. A revenue base concentrated this tightly means a downturn in one province or one industrial cluster, such as Rayong's petrochemical exports, can move the national revenue figure more than its share of companies would suggest. Counting registered companies by province alone understates just how concentrated Thailand's corporate revenue already is.
Definitions
- Reported revenue
- Aggregate revenue taken from the latest filed financial statement of each registered company, summed by province.
- Registered company
- A juristic person registered with the DBD and carrying a size band classification, whether currently active or dormant.
- Revenue concentration
- The share of total revenue held by a subset of provinces, here the five highest ranked by revenue.
- Top five by revenue vs top five by company count
- Two separate rankings of the same set of provinces, one sorted by aggregate revenue and one by number of registered companies. The two rankings do not contain the same five provinces.
Assumptions
- Revenue is attributed to the province listed as a company's registered address, which can differ from where its operations actually take place.
- Only companies with a filed financial statement contribute to revenue totals, while company counts include all registered companies with a size band.
- A small residual of revenue and companies with no recorded province, about 0.08 percent of national revenue, is excluded from every provincial total.
Methodology
Company counts and revenue are drawn from the Department of Business Development's registered juristic person database, aggregated by province in market_province_insight and cross checked against the national totals in market_national_insight, both as of 7 Jul 2026. Reported revenue is the sum of the latest filed financial statement revenue figure for each company with a filing on record, attributed to the province of its registered address. Registered companies covers all juristic persons carrying a size band classification, whether active or dormant. The top five by revenue and the top five by company count are two independently sorted rankings of the same 77 provinces plus Bangkok, and they are not the same five provinces. Shares are computed against the whole economy anchors of 1,989,709 registered companies and 80,148,033,688,000 baht in total reported revenue.
How we verified this
- Summed the five highest revenue provinces, Bangkok 50,546,964,253,127.01 plus Samut Prakan 4,826,110,417,220.06 plus Chon Buri 3,810,392,598,538.45 plus Rayong 3,201,564,240,994.13 plus Pathum Thani 2,097,686,603,114.81, equals 64,482,718,112,994.46 baht, divided by the national total of 80,148,033,688,000.39 baht gives 80.45 percent, rounded to 80.5 percent.
- Summed the five highest company count provinces, Bangkok 812,799 plus Chon Buri 127,023 plus Nonthaburi 102,370 plus Samut Prakan 97,609 plus Pathum Thani 81,256, equals 1,221,057 companies, divided by the registered company total of 1,989,709 gives 61.37 percent, rounded to 61.4 percent.
- Confirmed the two top five lists differ by exactly one province: Rayong appears in the revenue ranking but not the company count ranking, where Nonthaburi appears instead, by comparing both sorted lists directly from market_province_insight.
- Computed revenue attributed to the top five by company count instead, 62,899,981,046,602.88 baht, divided by the national total gives 78.48 percent, rounded to 78.5 percent, and their combined company count of 1,151,770 divided by the registered total gives 57.89 percent, rounded to 57.9 percent, when using the revenue based top five list instead.
- Divided the top five revenue provinces' combined revenue, 64,482,718,112,994.46 baht, by their combined company count, 1,151,770, giving 55.99 million baht average revenue per company, versus 15,665,315,575,005.93 baht divided by 837,939 companies in the remaining provinces, giving 18.70 million baht, a ratio of about 3.0.
- Confirmed Rayong's revenue of 3,201,564,240,994.13 baht is 6.06 times Chiang Mai's 528,648,685,034.05 baht despite Rayong having about half as many companies, 33,083 versus 65,164.
References
- Department of Business Development. (2026). Registered juristic persons and financial statement aggregates. Ministry of Commerce, Thailand. https://www.dbd.go.th/
- Office of the National Economic and Social Development Council. (2024). Gross regional and provincial product (GPP). https://www.nesdc.go.th/en/info/gross-regional-and-provincial-product-gpp/
Frequently asked questions
How much of Thailand's company revenue does Bangkok alone generate?
Bangkok generates 50.55 trillion baht, which is 63.1 percent of the country's total reported company revenue, already more than half of the national total by itself.
Which province is in the top five by revenue but not the top five by company count?
Rayong. It ranks fourth by revenue with 3.20 trillion baht but only tenth by company count with 33,083 registered companies. Nonthaburi takes its place in the company count top five.
Is company revenue concentration the same as GDP concentration in Thailand?
The two point the same direction but are not identical measures. NESDC's gross regional product data puts the Bangkok metropolitan region at roughly half of national GDP, while the DBD company registry puts the top five provinces at 80.5 percent of reported company revenue.
Cite this page
Chatpong L. (2026). Thailand's Top 5 Provinces Hold 80% of Company Revenue, 2026. Max Data Insights. https://maxdatathailand.com/insights/revenue-concentration-by-thai-province-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.