Porter’s Five Forces

Understand who can claim value in an industry—and why attractive growth does not always produce attractive profits.

In one minute

Five Forces examines the structure of an industry through:

1. rivalry among existing competitors;
2. threat of new entrants;
3. threat of substitutes;
4. bargaining power of buyers;
5. bargaining power of suppliers.

The unit of analysis is the industry, not one competitor. The goal is to explain the drivers of long-run profitability, identify where pressure is strongest and choose a position or action that improves the organisation’s exposure.

Best for: market entry, positioning, investment and business-model analysis.
Avoid when: the industry boundary is undefined or you only want a competitor feature comparison.

The problem it addresses

Managers often define competition too narrowly as “the companies that look like us.” Profit can also be constrained by powerful customers, scarce suppliers, easy entry or a different way of solving the same customer need.

The intended outcome is an evidence-backed view of structural pressure and the strategic choices that follow from it.

When to use it

• before entering or leaving an industry segment;
• when growth is strong but margins are weak;
• when buyer or supplier terms are changing;
• when a platform, regulation or technology changes entry barriers;
• when deciding where to differentiate;
• before using SWOT to assess your relative position.

When not to use it

Do not use Five Forces:

• as a scorecard for named competitors;
• to predict a quarterly market share;
• without defining the product, customer and geographic boundary;
• as proof that an industry is permanently attractive or unattractive;
• instead of customer research, capability analysis or financial modelling;
• as a static picture in a rapidly changing market.

For a platform or ecosystem, one organisation can be a supplier, channel, buyer and complementor at the same time. Map those roles explicitly, then pair Five Forces with ecosystem and capability analysis. The framework can still expose value pressure, but it should not erase positive complementarities or rapid innovation.

Inputs required

• a defensible industry definition;
• revenue pools, margins and growth by segment where available;
• buyer concentration, switching costs and price sensitivity;
• supplier concentration, uniqueness and forward-integration risk;
• entry requirements and credible entrant types;
• substitute solutions and customer switching behaviour;
• rivalry indicators such as capacity, differentiation and exit barriers.

Step-by-step process

1. Define the industry

Name the customer need, product scope, geography and value-chain level. Too broad hides important economics; too narrow excludes real substitutes.

2. Identify actors and value flows

Map who pays, who supplies critical inputs, who controls access and which alternatives satisfy the same need.

3. Analyse each force by its drivers

Avoid rating a force from intuition alone. For example, buyer power may be higher when buyers are concentrated, can switch cheaply, can credibly integrate backward or view the offer as undifferentiated.

4. Separate current strength from direction

Record both:

• current pressure: low / medium / high;
• expected direction: weakening / stable / strengthening.

5. Explain the profit mechanism

Describe how each force affects price, cost, investment need or risk. This is more useful than a five-point score with no economic explanation.

6. Identify the pivotal forces

One or two forces usually matter most to the strategic question. Prioritise the drivers that are both material and influenceable.

7. Form strategic responses

Consider how to:

• position where forces are weaker;
• build differentiation or switching value;
• reduce dependency;
• influence industry structure;
• exit a structurally poor position;
• test assumptions before committing capital.

Visual model

Text alternative: rivalry sits at the centre and is affected by entrants, suppliers, buyers and substitutes. Together the five forces shape industry profit potential and inform strategic choices.

Interactive example

Scenario

Northstar is considering scheduling software for independent clinics.

• Three practice-management platforms already bundle basic booking.
• Clinics can export patient lists, but migrating workflows takes several weeks.
• Payment and messaging APIs are supplied by a few large platforms.
• A small software team can build a simple booking product, but certification and clinic integrations take time.
• Clinics can continue using phones, web forms or general calendar tools.
• Most clinics are small, while a few buying groups negotiate for many locations.

Your move

Choose the strongest force and name the driver—not just the force label.

Worked answer

There is no automatic single answer. A defensible choice is supplier power, driven by dependence on a small number of messaging and payment platforms. Another is rivalry, driven by bundling from established practice-management vendors.

A weak answer says “competition is high.” A strong answer links evidence to economics: “Bundled booking lowers buyers’ willingness to pay for a standalone product, increasing price pressure unless Northstar differentiates on workflow or outcomes.”

Facilitation notes

• Assign one force to each pair of participants.
• Require at least two evidence points for a high rating.
• Ask “compared with what segment?” whenever ratings become generic.
• Include substitutes that look different but solve the same job.
• End with economic implications and decisions, not only force ratings.

Expected output

• a clear industry boundary;
• a map of actors and value flows;
• driver-level analysis of all five forces;
• current strength and expected direction;
• a short economic explanation for each force;
• 2–4 strategic responses and assumptions to test.

Common mistakes

1. Listing competitors instead of analysing industry structure.
2. Confusing a complement with a substitute.
3. Treating every supplier or buyer as equally powerful.
4. Using market growth as proof of profitability.
5. Adding unrelated factors as a “sixth force” without explaining the mechanism.
6. Averaging five scores and losing the pivotal force.
7. Ignoring changes in boundaries and business models.

Quality checklist

• The industry boundary names need, product scope and geography.
• Each force is supported by driver-level evidence.
• Current strength and future direction are separate.
• The analysis explains effects on price, cost or investment.
• Substitutes are defined from the buyer’s job, not product similarity.
• The pivotal forces are identified.
• Strategic responses state what assumption they depend on.

Template

Knowledge check

A customer can switch to a spreadsheet that solves the basic scheduling need at lower cost. Which force does this primarily strengthen?

A. Rivalry
B. Threat of substitutes
C. Supplier power
D. Threat of entrants

Answer: B. The spreadsheet is a different type of solution that can satisfy the same underlying need.

Related tools

• Precedes: SWOT Analysis
• Often combined with: PESTLE Analysis
• Supports: Ansoff Matrix, Scenario Planning
• Not to be confused with: competitor benchmarking

References

1. Porter, M. E. “How Competitive Forces Shape Strategy.” Harvard Business Review, March–April 1979. HBR article (opens in a new tab). Primary publication introducing the framework.
2. Porter, M. E. “The Five Competitive Forces That Shape Strategy.” Harvard Business Review, January 2008. HBR article (opens in a new tab). Primary updated exposition.
3. Porter, M. E. Competitive Strategy: Techniques for Analyzing Industries and Competitors. Free Press, 1980. ISBN 978-0-02-925360-1. Primary book-length treatment.
4. Teece, D. J. Dynamic Capabilities and Related Paradigms. Cambridge University Press, 2025. Cambridge Core (opens in a new tab). Independent contemporary critique: Five Forces can understate innovation, complements, capabilities and ecosystem dynamics, especially for digital platforms.

Sources reviewed 27 July 2026.