What is a good P/S ratio for growth stocks?

There is no universal good P/S ratio — it depends entirely on the sector and revenue growth rate. For high-growth software companies (30%+ revenue growth), a P/S of 8–15 can be reasonable. For slower-growth businesses, anything above 3–4x typically demands a clear margin expansion story. The more useful framework is to compare a company's P/S to sector peers and its own historical range, then check whether revenue growth is fast enough to compress the multiple over 2–3 years at the current price.

Is P/S ratio better than P/E for screening tech stocks?

P/S is more useful than P/E specifically for pre-profit or recently profitable tech companies where earnings are volatile or negative. P/E cannot be computed when earnings are negative, and it's easily distorted by one-time charges, stock-based compensation, and depreciation policy. P/S cuts through these issues because revenue is harder to manipulate. That said, for mature, consistently profitable tech companies, P/E and EV/EBITDA give a more complete picture of earning power than P/S alone.

How do I use P/S ratio to spot overvalued stocks?

Compare a stock's current P/S to its 3–5 year historical average and to sector peers. If a company's P/S is more than 50% above its own historical median without a corresponding acceleration in revenue growth, that's a warning sign. Also watch for P/S expansion without gross margin improvement — paying more for revenue that's not getting more profitable is a red flag. Combining P/S with revenue growth deceleration data is one of the most reliable ways to identify overvalued momentum stocks before multiple compression sets in.

Price-to-Sales Ratio: How to Screen Stocks Without Earnings

P/S ratio screens for value when P/E fails — ideal for high-growth and pre-profit companies. Learn exact thresholds. Start screening on DeltaScreener today.

Price-to-earnings breaks down when a company has no earnings — but that doesn't mean valuation is impossible. The price-to-sales (P/S) ratio is the metric serious screeners reach for when P/E returns nothing useful, and it's one of the most underused filters in fundamental analysis. Used correctly, it surfaces genuine value in high-growth sectors and flags overvaluation before the market catches on.

What the P/S Ratio Actually Measures

P/S ratio is calculated as market capitalization divided by trailing twelve-month revenue (or share price divided by revenue per share). Unlike P/E, it can't be gamed by accounting choices around depreciation, amortization, or one-time charges. Revenue is harder to manipulate than earnings, which makes P/S a useful sanity check even for profitable companies.

A P/S of 1.0 means you're paying $1 for every $1 of annual revenue. A P/S of 10 means you're paying $10. The ratio only becomes meaningful in context — compared to sector peers, the company's own historical range, and its revenue growth rate.

The key insight: a high P/S is only defensible if revenue is growing fast enough to compress it over time. A software company growing revenue at 40% annually can justify a P/S of 15-20. A mature retailer with 3% revenue growth cannot.

Sector Benchmarks You Need to Know

P/S thresholds vary dramatically by sector, and applying the wrong benchmark is a common screening mistake. Here are realistic ranges based on historical norms:

Software/SaaS: 5–20x is typical; above 25x requires exceptional growth (40%+ YoY)
Semiconductors: 3–8x for diversified players; fabless designers often trade higher
Biotech (pre-revenue): P/S is irrelevant; use pipeline value or cash runway instead
Healthcare equipment: 2–5x; above 6x needs strong recurring revenue component
Consumer discretionary: 0.5–2x; above 3x is premium territory requiring brand or margin story
Retail/grocery: 0.1–0.5x; these are low-margin businesses and P/S reflects it
Industrial: 0.8–2.5x; capital-intensive businesses with thin margins rarely justify more

When screening, set your P/S ceiling at the 75th percentile for the sector, not at an absolute number. A P/S of 4x is cheap for enterprise software and expensive for a grocery chain.

The P/S + Growth Rate Combination Screen

The most powerful application of P/S is combining it with revenue growth to calculate the Price/Sales-to-Growth (PSG) ratio — analogous to the PEG ratio but for pre-profit companies. Divide the P/S by the annual revenue growth rate (as a whole number). A PSG below 1.0 suggests the market may not be fully pricing in the growth trajectory.

For example: a company with a P/S of 8 and revenue growing at 35% annually has a PSG of 0.23 — potentially undervalued relative to its growth. The same P/S of 8 with 8% revenue growth yields a PSG of 1.0 — fair value at best.

When building this screen, filter for:

P/S below sector median
Revenue growth above 20% YoY (or above sector average)
Gross margin above 40% (low-margin businesses shouldn't trade on high P/S multiples)
Revenue growth accelerating or stable over 3 consecutive quarters

When P/S Gives False Signals

P/S has real blind spots. A company with $1B in revenue and a P/S of 0.5 looks cheap — until you discover it's burning $200M annually in operating losses. Revenue without a credible path to profitability isn't valuable; it's a liability dressed up as growth.

Always pair a low P/S screen with at least one margin filter. Gross margin is the first gate: below 20%, any premium P/S is hard to justify. Operating margin trend matters too — a company moving from -30% to -10% operating margin over three years on rising revenue is a very different risk profile than one stuck at -40%.

Also watch for revenue that's lumpy, one-time, or recognition-accelerated. SaaS companies that front-load contract revenue can show inflated TTM revenue that won't repeat. Check deferred revenue trends and net revenue retention rates where disclosed.

Building a P/S Screen on DeltaScreener

DeltaScreener's screener lets you filter by P/S ratio alongside revenue growth, gross margin, and market cap in a single pass. A practical starting screen for identifying undervalued growth companies:

P/S ratio: below 6 (adjust by sector)
Revenue growth (YoY): above 15%
Gross margin: above 35%
Market cap: above $500M (filters out microcap liquidity risk)
Sector: Technology or Healthcare (where P/S is most informative)

This combination typically returns 40–80 candidates from the US market, which you can then sort by P/S ascending to prioritize the most attractively valued names relative to their revenue base. From there, manual review of revenue quality, competitive position, and balance sheet strength separates the genuine opportunities from the traps.

P/S is a starting filter, not a buy signal — but as a first pass for finding growth companies the market hasn't fully priced, it's one of the most efficient tools available. Run this screen at deltascreener.com/screener and refine it with your own sector and margin thresholds.