Which Companies Can You Meaningfully Compare Using Price-to-Sales?
Equal revenue can produce different earnings and cash flow. Worked examples explain how to align revenue recognition, normalized margins, and capital structure when using PSR, and how it differs from EV/Sales.
PSR, or the price-to-sales ratio, divides market capitalization by revenue, allowing comparisons even for companies with small earnings or losses. But revenue is not the profit left for shareholders, so you need evidence linking it to profitability. Interpretation improves when companies have similar business models, revenue recognition methods, and capital structures.
Check that revenue means the same thing in the denominator
A company that buys and resells products may recognize the full transaction amount as revenue, while an intermediary may recognize only its commission. Similar transaction volumes can therefore produce very different revenue figures. In subscription businesses, recurring revenue and short-term implementation revenue also differ in sustainability. Mistaking transaction volume for accounting revenue, or using figures that ignore cancellations and refunds, changes the multiple itself. Before comparing companies, read the revenue recognition policies and segment mix in their annual reports and document the economic meaning of the denominator.
Build a bridge from revenue to earnings
Assuming positive net income and matching scope and periods, PSR equals PER multiplied by net profit margin. A business retaining little profit from each KRW 1 of revenue can have a lower sales multiple even at the same earnings multiple. When you find a low PSR, first estimate a sustainable normalized margin and the costs of reaching it. A business that must continually spend on advertising to retain customers is difficult to compare solely on revenue growth with one that retains customers at little additional cost.
Choose between an equity multiple and an enterprise value multiple
Revenue arises from business activity before interest is paid to creditors, while market capitalization represents shareholders’ claims. Comparing companies with very different debt levels using PSR alone can conceal this distinction. In such cases, use EV/Sales as a supplementary measure, alongside operating margins and reinvestment needs. If high revenue growth is used to explain losses, include the cash required to reach profitability and the possibility of additional share issuance. A revenue multiple is a starting point for deeper analysis of the earnings model, rather than a way to erase losses. Also separate growth from acquisitions that expand the consolidation scope from growth in the existing business. Reviewing the cash and debt used to fund acquisitions helps avoid attributing a lower multiple to revenue growth alone.
Worked example
Hypothetical example: Two companies each have revenue of KRW 100 billion and are assigned the same PER of 15x. With a normalized net margin of 4%, one company has net income of KRW 4 billion, market capitalization of KRW 60 billion, and PSR of 0.6x. At a 12% net margin, the other has KRW 12 billion, KRW 180 billion, and 1.8x, respectively. A threefold difference in PSR can therefore arise from the same valuation of earnings.
What to check
- Have you checked whether revenue is reported as gross transaction amounts or net commissions?
- Have you estimated the target margin together with the costs required to achieve it?
- Have you also considered EV/Sales for peers with different debt levels?
Sources and primary materials
This is educational material about research methods. For an actual company decision, verify the filings and primary sources for the relevant period.