By Antonios Fotakis | July 2026
A note before you read: The Price-to-Sales ratio exists because of a simple problem – some of the most interesting companies in the world don’t have earnings yet. The P/E ratio breaks down entirely for these businesses. The P/S ratio steps in. Understanding when and how to use it could change how you evaluate an entire category of investment opportunities.
What is the P/S ratio (Price-to-Sales). Let me ask you something.
Imagine a new restaurant has just opened in your city. It’s packed every night. There are queues out the door. Word of mouth is extraordinary – people are talking about it everywhere. Revenue is growing at 80% per year.
But the kitchen is expensive, the staff costs are high, and the owners are reinvesting everything into opening new locations. Right now, the restaurant makes no profit at all. In fact, it’s losing money.
Does that mean the business has no value?
Of course not. The revenue is real. The customer demand is real. The growth trajectory is real. The profit simply hasn’t arrived yet – because the owners are choosing to build something larger before they optimise for margin.
If you wanted to value this restaurant without any earnings to reference, you’d naturally look at its revenue – and ask how much you’re paying for each euro of sales it generates.
That’s the Price-to-Sales ratio.
And for an entire class of companies – growth businesses, early-stage disruptors, and companies in temporarily unprofitable phases – it’s the most honest valuation tool available.
So What Is the P/S Ratio, Exactly?
The P/S ratio (Price-to-Sales ) – sometimes called the revenue multiple – compares a company’s market value to its annual revenue.
The formula: P/S Ratio = Market Capitalisation ÷ Annual Revenue
Or at the per-share level: P/S Ratio = Share Price ÷ Revenue Per Share
If a company has a market cap of €2 billion and generates €500 million in annual revenue, its P/S ratio is 4. Investors are paying €4 for every €1 of annual sales the company generates.
Simple. Clean. And crucially – it works even when every other valuation metric breaks down, because revenue exists before profit does.
The P/S ratio doesn’t ask how much the company earns. It asks how much you’re paying for the machine that generates the sales – regardless of whether that machine is currently profitable.
Why the P/S Ratio Exists – The Problem It Solves
To understand why the P/S ratio matters, you need to understand exactly where the P/E ratio fails.
The P/E ratio divides share price by earnings per share. But what happens when earnings per share is zero – or negative? The calculation either produces an undefined result or a meaningless negative number. The metric simply stops working.
This is a significant problem because many of the most interesting investment opportunities involve companies that are deliberately unprofitable – not because they’re failing, but because they’re investing aggressively in growth.
Amazon lost money for most of its first decade of existence. Spotify has operated at a loss for much of its life as a public company. Many of the most successful technology, biotech, and platform businesses go through extended periods of negative earnings while building the infrastructure, customer base, or market position that will eventually generate enormous profit.
For all of these companies, the P/E ratio says nothing. The P/S ratio still gives you a meaningful valuation framework – because even when there are no earnings, there is revenue. And revenue is the foundation that future earnings will eventually be built on.
The P/S ratio is the valuation tool for companies where the story is in the growth, not yet in the profit.
What Is a Good P/S Ratio?
As with every metric in this screener series – the answer is always the same: it depends entirely on the sector, the growth rate, and the stage of the business.
| P/S Ratio | What It Generally Suggests |
|---|---|
| Below 1x | Very cheap — either deeply undervalued or the market sees serious problems |
| 1x – 3x | Moderate — typical for mature, slow-growth businesses |
| 3x – 8x | Reasonable for businesses with solid growth and improving margins |
| 8x – 15x | Growth premium priced in — market expects significant revenue expansion |
| Above 15x | High expectations — requires exceptional growth justification |
| Above 30x | Speculative territory — usually only sustainable for the fastest-growing companies |
But these ranges shift dramatically based on context. A software company with 40% revenue growth and 70% gross margins deserves a very different P/S multiple than a retailer with 5% revenue growth and 25% gross margins – even if both are currently unprofitable.
The P/S ratio is not a verdict. It’s a starting point for asking whether the price you’re paying is justified by the revenue trajectory.
The Critical Variable P/S Ignores: Profit Margin
Here is the most important limitation of the P/S ratio – and understanding it will save you from one of the most common mistakes in growth investing.
The P/S ratio treats all revenue equally. But €1 of revenue at a 30% profit margin is worth dramatically more than €1 of revenue at a 5% profit margin. Revenue is just the top line – what matters ultimately is how much of that revenue converts into profit.
This means two companies with identical P/S ratios can be radically different investments:
Company A: P/S of 8x, gross margin of 75%, growing revenue at 35% per year with a clear path to 20%+ net margins at scale. The high P/S is arguably justified – high-margin, fast-growing revenue compounds into exceptional earnings power.
Company B: P/S of 8x, gross margin of 25%, growing revenue at 20% per year with no clear path to meaningful profitability. The same P/S multiple here is much harder to justify – the revenue is less valuable because most of it gets consumed by costs.
A high P/S on high-margin revenue can be completely rational. The same P/S on low-margin revenue may be extremely dangerous.
This is why the P/S ratio should always be read alongside profit margin – specifically gross margin, which tells you how profitable the core product or service is before overhead costs are applied. Together, they give you a picture that neither can provide alone.
P/S vs P/E – When to Use Each
Now that you understand both metrics, here is the clearest possible guide to when each one is most useful:
| Situation | Better Metric | Why |
|---|---|---|
| Profitable, mature company | P/E | Earnings exist and are meaningful – P/E gives a direct valuation anchor |
| Unprofitable growth company | P/S | No earnings to reference – P/S is the only meaningful valuation tool |
| Company in temporary loss due to investment | P/S (+ forward P/E) | Current earnings are distorted – revenue growth tells the real story |
| Comparing companies across different tax regimes | EV/EBITDA or P/S | P/E distorted by different tax rates |
| Capital-light, high-margin business | Both P/E and P/S | Both work well – use both for confirmation |
| Very early stage or pre-revenue | Neither | At pre-revenue stage, valuation requires entirely different frameworks |
The most sophisticated investors don’t choose between P/E and P/S – they use both, and look for consistency or interesting divergences between them. A company with a low P/S but a high P/E might be generating revenue efficiently but converting it to earnings poorly. A company with a low P/E but a very high P/S might be highly profitable on small revenue – but the growth ceiling could be low.
Want to understand how to combine valuation metrics when evaluating real growth companies? Get the complete Stocks Explained guide here.
The Bubble Warning: When P/S Gets Dangerous
The P/S ratio is extraordinarily useful – and it has also been at the centre of some of the most destructive investment bubbles in recent history.
During the dot-com bubble of the late 1990s, investors applied enormous P/S multiples to internet companies with tiny revenues and no earnings, on the premise that the revenue would eventually grow into the valuation. For most of those companies, it never did.
During the 2020–2021 growth stock frenzy, many technology and software companies traded at P/S multiples of 30x, 50x, or even higher. When interest rates rose sharply in 2022, those multiples compressed violently – some companies falling 70–80% from their peaks while their underlying revenue continued to grow. The revenue was real. The multiple had simply become detached from any reasonable expectation of future earnings.
The P/S ratio has no natural ceiling – which means it can reflect genuine opportunity or pure speculation, and the number alone cannot tell you which one you’re looking at.
The anchor that keeps P/S grounded is always the path to profitability. The question is not just “how fast is revenue growing?” but “at what margins, and when does this convert into real earnings?” A company with a clear, credible answer to that question deserves a higher P/S. A company with no answer, or an answer that keeps getting pushed further into the future, deserves significantly more caution.
EV/Sales – The More Complete Version
Just as we discussed with EV/EBITDA – Enterprise Value gives a more complete picture of what a company truly costs to acquire than market cap alone, because it accounts for debt and cash.
The same logic applies here. EV/Sales (Enterprise Value divided by Revenue) is a more complete version of P/S for the same reason: it adjusts for the debt a company carries, so two companies with the same revenue but very different debt levels don’t appear equally valued.
EV/Sales = Enterprise Value ÷ Annual Revenue
For most beginner purposes, P/S is sufficient – and it’s the version you’ll most commonly see on screeners. But if you’re comparing companies with significantly different debt profiles, EV/Sales gives the more honest comparison. The methodology is identical; only the numerator changes.
How P/S Fits Into Our Three Categories
The Price-to-Sales ratio appears most prominently in one specific corner of the AF Core Global universe – but it’s relevant across all three philosophies in different ways.
In Fortress, we work primarily with broad ETFs and index funds – so individual company P/S matters less than the aggregate market valuation. At a macro level, market-wide P/S ratios can signal whether equities broadly are at historically expensive or reasonable levels.
In Cash Flow, P/S is rarely the primary tool – income investors are generally looking at profitable, established businesses where P/E, dividend yield, and EV/EBITDA give more meaningful valuation anchors. P/S can be useful as a sanity check, but it’s not the metric that drives Cash Flow decisions.
In High Voltage, P/S is one of our most important tools. Many High Voltage picks are growth companies without meaningful current earnings – which means P/E is unavailable and EV/EBITDA may be distorted. P/S, read alongside gross margin and revenue growth, gives us the clearest picture of whether we’re paying a reasonable price for an early-stage growth story. Every High Voltage pick that lacks current earnings gets evaluated through P/S – always cross-referenced with gross margin, revenue growth rate, and the credibility of the path to profitability.
One metric. Three different contexts. One consistent principle: know what you’re measuring and what it cannot tell you.
Not blind trust. Informed choice.
What to Look For When You See P/S on a Screener
When the Price-to-Sales ratio appears in your research, work through this sequence:
Does P/E exist for this company? If yes – use P/E as your primary valuation anchor and P/S as a secondary check. If no – P/S becomes your primary tool.
What is the gross margin? High P/S is far more defensible on high-margin revenue than on low-margin revenue. A P/S of 12x on 70% gross margins is a different proposition from the same multiple on 20% gross margins.
How fast is revenue growing? P/S multiples are paid for growth. A company growing revenue at 5% per year deserves a much lower P/S than one growing at 40%. If revenue growth is slowing, the multiple should compress – and if it hasn’t yet, it will.
What is the path to profitability? Not “when will this company be profitable” in the abstract – but specifically: at what revenue scale does the business model generate positive operating margins? Is that scale achievable, and on what timeline?
How does it compare to sector peers? A P/S of 10x in a sector where competitors trade at 6x needs a clear explanation – faster growth, better margins, or a stronger competitive position. Without one, you may be paying someone else’s premium.
Is the trend in the multiple compressing or expanding? A rising P/S driven by accelerating revenue growth can be rational. A rising P/S while revenue growth slows is a warning sign – the market is becoming more optimistic exactly as the business is decelerating.
For a complete guide to valuation and growth company analysis, our Stocks Explained guide covers everything you need. 👉 Get the Stocks Explained Guide Here
Nothing in this article constitutes financial advice. All content is for informational and educational purposes only. Always do your own research before making any investment decision.
