Company Size Distribution in Thailand: Micro to Large (2026)
In short
Thailand's company base is overwhelmingly small. Micro firms account for 75.3 percent of all registered companies as of 2 July 2026, and once small firms are added, the two groups make up 97.4 percent of the total. Large companies number just 13,810, or 0.7 percent. The Thai economy runs on a very long tail of tiny businesses.
How are Thai companies split by size?
Of the 1,986,709 companies with a size classification, 1,495,029 are micro businesses (DBD, 2026), a 75.3 percent share. Another 439,043 are small, bringing the combined micro and small total to 97.4 percent. Medium firms number 38,827, and only 13,810 companies qualify as large. In other words, fewer than one company in a hundred is large.
Share of companies by size band
- Micro75.3%1,495,029
- Small22.1%439,043
- Medium2.0%38,827
- Large0.7%13,810
Micro and small firms fill almost the entire pie.
Companies by size band
| Size band | Companies | Share |
|---|---|---|
| Micro | 1,495,029 | 75.3% |
| Small | 439,043 | 22.1% |
| Medium | 38,827 | 2% |
| Large | 13,810 | 0.7% |
Company count and share by size, as of 2 Jul 2026.
What a long tail means
A company base this skewed shapes everything from policy to sales strategy. Support programmes reach the most firms when they are built for micro and small owners, since those two bands are 97.4 percent of the field. Yet the 13,810 large companies, small in number, carry a disproportionate share of revenue, employment and tax. Anyone selling to Thai business has to decide early whether they are chasing the vast tail of small firms or the narrow head of large ones.
Definitions
- Micro company
- The smallest size band, typically the lowest tier of revenue and headcount in the official classification.
- SME
- Small and medium enterprises, here the micro, small and medium bands taken together.
Assumptions
- Size bands follow the registry classification and may lag a firm's current revenue or headcount.
- Companies without a size band are excluded from the classified total.
Methodology
Companies are grouped into micro, small, medium and large bands using the size classification carried in the registry, which reflects thresholds on revenue and employment. Counts are summed across all industry sections from the DBD registry as of 2 July 2026 and cover the 1,986,709 companies that carry a size band. Shares are computed against that classified total.
How we verified this
- Size bands summed to 1,986,709, matching the classified company total.
- Micro and small shares recomputed and added to 97.4 percent of the total.
- Large-company share confirmed as 13,810 divided by 1,986,709, or 0.7 percent.
References
- Department of Business Development. (2026). Registered juristic persons and financial statement aggregates. Ministry of Commerce, Thailand. https://www.dbd.go.th/
- National Statistical Office. (2025). Statistical yearbook Thailand. Office of the National Economic and Social Development Council. https://www.nso.go.th/
Frequently asked questions
What share of Thai companies are micro or small?
Together they make up 97.4 percent of all classified companies, with micro firms alone at 75.3 percent.
How many large companies are there in Thailand?
About 13,810, which is only 0.7 percent of the classified total.
Why does the size split matter?
It tells you the Thai market is a long tail of tiny firms with a small head of large ones, which shapes policy, sales and support design.
Cite this page
Chatpong L. (2026). Company Size Distribution in Thailand: Micro to Large (2026). Max Data Insights. https://maxdatathailand.com/insights/company-size-distribution-in-thailand-2026
Data & corrections
Download the data (CSV)Spot something off, or want to ask about the data? Email insights@maxsolutions.co.th. We publish corrections.
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.