Thai Gross Margin Barely Predicts Net Margin in 2026
In short
Gross margin and net margin are only weakly linked. Across 539,448 Thai companies with usable margin data as of 17 July 2026, the two ratios correlate at just 0.13, so gross margin explains barely 1.6 percent of the swing in net margin from one company to the next. Sort companies into gross margin quartiles, though, and a clear pattern appears. Average net margin climbs from negative 2.0 percent in the bottom quartile to positive 9.3 percent in the top quartile. Even in that top quartile, one in four companies still posts a net loss.
Does a strong gross margin guarantee a strong net margin?
No, not for an individual company. Correlating gross margin against net margin across 539,448 Thai companies with usable data as of 17 July 2026 produces a Pearson coefficient of just 0.13 (DBD, 2026). Squared, that figure means gross margin statistically accounts for only 1.6 percent of the variation in net margin from one company to the next. A company can post a fat gross margin and still bleed cash once overhead, interest and tax are paid. Another can run a thin gross margin and still turn a respectable profit. Knowing one company's gross margin tells you almost nothing about its net margin. The relationship only becomes visible once companies are grouped rather than compared one at a time.
Average net margin by gross margin quartile
- Bottom quartile-2
- Second quartile2
- Third quartile5
- Top quartile9
Figures in percent net margin.
Grouped by quartile, the climb is steady even though the company-level correlation is weak.
Net margin outcomes by gross margin quartile
| Gross margin quartile | Gross margin range | Companies | Average net margin | Share posting a net loss |
|---|---|---|---|---|
| Bottom quartile | up to 9.0% | 134,862 | -2.0% | 33.5% |
| Second quartile | 9.0% to 24.6% | 134,862 | 1.8% | 20.5% |
| Third quartile | 24.6% to 49.9% | 134,862 | 4.7% | 21.1% |
| Top quartile | 49.9% and above | 134,862 | 9.3% | 25.2% |
539,448 Thai companies split into four equal gross margin quartiles, as of 17 Jul 2026.
Why the pattern only shows up in groups
National margin statistics compress an entire economy into two numbers, one gross and one net, and imply a fixed relationship between them. The company-level picture is messier and more honest. A firm's path from gross profit to net profit runs through fixed costs, debt service, tax timing and one-off items that have little to do with how it prices its product. The Bank of Thailand has flagged rising operating cost and financing pressure as a real drag on smaller firms this year, part of what it calls a deepening strain on the small business sector (Thai Examiner, 2026). That drag lands unevenly across companies with similar pricing power. It shows up directly in the numbers here. A company sitting in the very top gross margin quartile still carries a 25.2 percent chance of reporting a net loss, almost identical to the 25.1 percent net loss rate across the entire 539,448 company sample. For a lender, investor or supplier sizing up one Thai company, gross margin is a starting clue, not a verdict. Ask for the net margin too, because the gap between the two hides most of the story.
Definitions
- Gross margin
- Gross profit as a share of revenue for a single company, calculated before overhead, interest and tax are subtracted.
- Net margin
- Net profit as a share of revenue for a single company, calculated after every cost including overhead, interest and tax.
- Pearson correlation coefficient
- A number from negative 1 to positive 1 that measures how closely two variables move together in a straight line. Zero means no linear relationship and 1 means they move in perfect lockstep.
- R squared
- The correlation coefficient squared. It states the share of variation in one variable that a straight line relationship with the other variable explains, on a scale from 0 to 1.
- Quartile
- One of four equal groups formed by sorting companies from lowest to highest gross margin and splitting them into four groups of the same size.
- Net loss
- A company whose net margin for the period is negative, meaning total cost exceeded revenue.
Assumptions
- The analysis is limited to companies with both a gross margin and a net margin computable from a filed statement, 631,892 of the 1,239,733 companies in the underlying company-level financial table.
- Companies whose gross margin or net margin ratio falls beyond plus or minus 200 percent are excluded, about 14.63 percent of the 631,892 with both fields present, because near-zero revenue or cost denominators produce ratios in the thousands of percent that would swamp both the correlation and the quartile averages.
- Margins are calculated from each company's most recent filed statement, not restated or averaged across multiple years.
- Quartile averages are simple means of each company's own ratio, not a revenue-weighted aggregate, so they differ from the national aggregate net margin figure the registry publishes at the whole-economy level.
- Correlation measures a straight line relationship only. A weak Pearson coefficient does not rule out a real but non-linear or grouped pattern, which the quartile breakdown here shows does exist.
Methodology
Gross margin and net margin are calculated per company from the DBD registry's filed financial statements, held in the registry's company-level financial data table as of 17 July 2026. Of the 1,239,733 companies in that table, 631,892 report a usable gross margin and net margin. Companies whose gross margin or net margin ratio falls beyond plus or minus 200 percent are excluded, since those come from firms with revenue or cost figures close to zero, producing ratios that run into the thousands of percent and would distort both the correlation and the quartile averages. That leaves 539,448 companies. Correlation is the standard Pearson coefficient computed across every company in that set. Quartiles are formed by sorting companies by gross margin and splitting them into four equal groups of 134,862 companies each. Averages within each quartile are simple means of each company's own net margin, not a revenue-weighted aggregate, so they will not match the national aggregate net margin figure the registry reports.
How we verified this
- 539,448 companies have both a usable gross margin and net margin within plus or minus 200 percent, recomputed by filtering the 631,892 companies with both fields present down to those within that range, a retention rate of 539,448 divided by 631,892 equals 85.37 percent.
- Pearson correlation between company gross margin and net margin across the 539,448 companies recomputed as 0.1268, and its square, the share of net margin variance gross margin explains, recomputed as 0.1268 times 0.1268 equals 0.0161, or 1.61 percent.
- Quartile boundaries were formed by sorting on gross margin and splitting into four equal groups, recomputed as 539,448 divided by 4 equals 134,862 companies per quartile.
- Average net margin by quartile recomputed directly from the data as -2.03 percent, 1.79 percent, 4.70 percent and 9.26 percent for quartiles one through four, a climb of 9.26 minus negative 2.03 equals 11.29 percentage points from bottom to top.
- Share of companies posting a net loss recomputed per quartile as the negative-net-margin count divided by quartile size: 45,200 divided by 134,862 equals 33.52 percent in the bottom quartile and 34,028 divided by 134,862 equals 25.23 percent in the top quartile.
- Economy-wide net loss rate recomputed as 135,325 companies with a negative net margin divided by the 539,448 company base equals 25.09 percent, confirming the top quartile's 25.23 percent loss rate sits close to the overall average despite that quartile's much higher gross margin.
References
- Department of Business Development. (2026). Registered juristic persons and financial statement aggregates. Ministry of Commerce, Thailand. https://www.dbd.go.th/
- Thai Examiner. (2026, September 11). Bank of Thailand warns economic potential is falling with a severe crisis in the small business sector. https://www.thaiexaminer.com/thai-news-foreigners/2026/09/11/bank-of-thailand-warns-economic-potential-is-falling-with-a-severe-crisis-in-the-small-business-sector/
Frequently asked questions
Does a high gross margin guarantee a high net margin in Thailand?
No. Across 539,448 Thai companies the correlation between gross margin and net margin is only 0.13, so gross margin explains about 1.6 percent of the difference in net margin from one company to the next.
How much higher is net margin in the top gross margin quartile than the bottom?
Average net margin rises from negative 2.0 percent in the bottom gross margin quartile to positive 9.3 percent in the top quartile, an 11.3 percentage point gap, based on data as of 17 July 2026.
Can a company have a strong gross margin and still lose money?
Yes. 25.2 percent of companies in the top gross margin quartile still reported a net loss, a rate close to the 25.09 percent net loss rate across the whole 539,448 company sample.
Cite this page
Chatpong L. (2026). Thai Gross Margin Barely Predicts Net Margin in 2026. Max Data Insights. https://maxdatathailand.com/insights/thai-companies-gross-margin-doesnt-predict-net-margin-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.