Top 5-Digit TSIC Codes by Small Company Count in Thailand 2026
In short
TSIC code 41002 holds 28,400 small companies, the most of any 5-digit code in Thailand as of 17 July 2026. That is 6.44 percent of all 441,008 small firms. The top five codes together hold 68,532, or 15.54 percent. Those five are 0.41 percent of the 1,228 codes on the register. A handful of codes carries a disproportionate share of Thailand's small firms.
Which 5-digit codes hold the most small companies?
TSIC 41002 leads by a wide margin with 28,400 small companies (DBD, 2026). The next code, 56101, holds 12,921, so the leader carries 2.20 times as many. Wholesale code 46599 follows with 10,143. Transport code 49323 has 9,184 and construction code 43210 has 7,884. Small companies make up 22.2 percent of the register, but a short list of codes holds a big slice of them. The top five codes alone hold 15.54 percent of every small firm in the country.
Small companies by 5-digit TSIC code, top 10
- 4100228,400
- 5610112,921
- 4659910,143
- 493239,184
- 432107,884
- 410017,827
- 475247,471
- 681036,862
- 477326,397
- 681046,128
Figures in small companies.
Code 41002 is more than twice the size of the runner-up.
The ten codes with the most small companies
| Rank | TSIC code | Industry section | Small companies | Share of all small firms | All companies in code | Small share of code |
|---|---|---|---|---|---|---|
| 1 | 41002 | Construction | 28,400 | 6.44% | 165,550 | 17.2% |
| 2 | 56101 | Accommodation and food service | 12,921 | 2.93% | 51,204 | 25.2% |
| 3 | 46599 | Wholesale and retail trade | 10,143 | 2.30% | 36,728 | 27.6% |
| 4 | 49323 | Transportation and storage | 9,184 | 2.08% | 25,521 | 36.0% |
| 5 | 43210 | Construction | 7,884 | 1.79% | 25,733 | 30.6% |
| 6 | 41001 | Construction | 7,827 | 1.77% | 38,439 | 20.4% |
| 7 | 47524 | Wholesale and retail trade | 7,471 | 1.69% | 19,645 | 38.0% |
| 8 | 68103 | Real estate | 6,862 | 1.56% | 26,155 | 26.2% |
| 9 | 47732 | Wholesale and retail trade | 6,397 | 1.45% | 15,036 | 42.5% |
| 10 | 68104 | Real estate | 6,128 | 1.39% | 16,435 | 37.3% |
Small company count, total companies and small share by 5-digit TSIC code, as of 17 Jul 2026. Small share is small companies divided by all companies in the code.
Big counts and high small shares are different things
Code 41002 tops the count, yet only 17.2 percent of its 165,550 companies are small. Most of the rest are micro firms. Retail code 47732 tells the opposite story. It has 6,397 small companies, and they are 42.5 percent of its 15,036 firms. Construction supplies three of the top ten codes: 41002, 43210 and 41001. Together they hold 44,111 small firms, or 42.74 percent of the top ten total. Wholesale and retail also takes three places, and real estate takes two.
Why this matters
The small band is the middle rung of the size ladder, and it is where a micro firm either grows or stalls. A supplier, lender or landlord who wants small customers does not need to search 1,228 codes. Five of them cover more than one small firm in every seven. The ranking also shows that raw counts mislead. A code with a huge number of micro shells can top a list of small firms without being a small-firm industry at all. Read the count and the share side by side before sizing any market, because the biggest code is not the most small-firm-heavy one.
Definitions
- TSIC
- Thailand Standard Industrial Classification, the national scheme that assigns each company an industry code. The 5-digit level is the finest grain used here.
- Small company
- A company in the small size band of the DBD registry, the middle rung between micro and medium.
- Small share of code
- Small companies in a code divided by all companies in that code.
- Aggregate
- A total or ratio computed across many companies, not a figure for any single company.
Assumptions
- Size bands follow the registry classification, not a separate survey.
- Registered companies include dormant ones, so counts show registrations, not trading firms.
- The 5-digit table sums to 441,008 small firms, 80 more than the national figure of 440,928, a refresh timing gap.
- Code descriptions are unavailable, so only the parent industry section is named.
Methodology
Counts come from the Department of Business Development registry, aggregated per 5-digit TSIC code with a computation date of 17 July 2026. A company is small if it falls in the small size band assigned in the registry. Shares use the 441,008 small companies summed across all 1,228 codes as the denominator. Sub-industry names are not available at the 5-digit level, so codes are shown with their parent industry section. The sum of codes is 80 above the national size band total of 440,928 because of registry refresh timing.
How we verified this
- Top five small counts 28,400 + 12,921 + 10,143 + 9,184 + 7,884 = 68,532, and 68,532 / 441,008 = 15.54 percent.
- Top ten sum 68,532 + 7,827 + 7,471 + 6,862 + 6,397 + 6,128 = 103,217, and 103,217 / 441,008 = 23.40 percent.
- 28,400 / 441,008 = 6.44 percent and 28,400 / 12,921 = 2.20 times.
- Small share of register 441,008 / 1,986,709 = 22.20 percent, matching the data guide's 22.2 percent.
- Construction codes 28,400 + 7,884 + 7,827 = 44,111, and 44,111 / 103,217 = 42.74 percent.
- Five codes of 1,228 is 0.41 percent. Code 41002 small share 28,400 / 165,550 = 17.2 percent. Code 47732 6,397 / 15,036 = 42.5 percent.
References
- Department of Business Development. (2026). Registered juristic persons and size band aggregates. Ministry of Commerce, Thailand. https://www.dbd.go.th/
Frequently asked questions
Which 5-digit TSIC code has the most small companies in Thailand?
Code 41002 has 28,400 small companies as of 17 July 2026, according to DBD registry aggregates.
How many small companies are there in Thailand?
The 5-digit code table sums to 441,008 small companies, which is 22.2 percent of the 1,986,709 companies with a size band.
How concentrated are small companies by code?
The top five codes hold 15.54 percent of all small firms and the top ten hold 23.40 percent, out of 1,228 codes.
Is the top code a small-firm industry?
Not really. Only 17.2 percent of the companies in code 41002 are small. Code 47732 has a 42.5 percent small share.
Cite this page
Chatpong L. (2026). Top 5-Digit TSIC Codes by Small Company Count in Thailand 2026. Max Data Insights. https://maxdatathailand.com/insights/top-5-digit-tsic-codes-by-small-company-count-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.