Quick reference
Memory aid
Five forces: Rivals, Buyers, Suppliers, New Entrants, Substitutes — who has the power?
TL;DR
Analyze five structural forces that determine industry profitability. Rate each force, assess overall attractiveness, then position your strategy to mitigate strong forces and exploit weak ones.
What Is Porter's Five Forces?
Porter's Five Forces helps you understand how competitive your industry really is by analyzing five forces that determine profitability: how intense rivalry is, how much bargaining power buyers and suppliers have, how easy it is for new competitors to enter, and whether substitutes could replace what you offer.
The essence of strategy is choosing what not to do.
— Michael E. Porter, "What Is Strategy?" Harvard Business Review (1996)
The framework argues that industry profitability is not determined by what the product looks like or whether it embodies high or low technology, but by industry structure. The five forces collectively determine the intensity of competition and thus the profit potential of the industry. A strong force can be considered a threat because it will reduce profit, while a weak force is an opportunity because it allows the company to earn greater profits. The key for strategists is to understand the forces that shape competition, then craft a strategy that positions the organization favorably.
Five Forces Competitive Pressure Map
A central element representing Industry Rivalry surrounded by four forces pushing inward: New Entrants from above, Substitutes from below, Supplier Power from the left, and Buyer Power from the right.
A central element representing Industry Rivalry surrounded by four forces pushing inward: New Entrants from above, Substitutes from below, Supplier Power from the left, and Buyer Power from the right.
Origin & context
Porter published the Five Forces framework in the Harvard Business Review article 'How Competitive Forces Shape Strategy.' It became one of the most influential strategy frameworks in business history.
Core Components
Competitive Rivalry
The intensity of competition among existing firms in the industry.
Example
The airline industry has high rivalry due to many competitors, low differentiation, and high fixed costs.
Threat of New Entrants
How easy or difficult it is for new competitors to enter the industry.
Example
The pharmaceutical industry has high barriers to entry due to R&D costs, patents, and regulatory approval.
Bargaining Power of Suppliers
The ability of suppliers to drive up prices or reduce quality.
Example
Intel's dominance in processors gave it enormous supplier power over PC manufacturers.
Bargaining Power of Buyers
The ability of customers to pressure for lower prices or higher quality.
Example
Large retailers like Walmart have significant buyer power over consumer goods manufacturers.
Threat of Substitutes
The likelihood that customers will switch to alternative products or services.
Example
Streaming services are a substitute for traditional cable television.
Porter first set out the model in his 1979 Harvard Business Review article 'How Competitive Forces Shape Strategy.' Others later proposed complementors as a 'sixth force,' notably Adam Brandenburger and Barry Nalebuff; in his 2008 HBR update, 'The Five Competitive Forces That Shape Strategy,' Porter treated complements as a factor that works through the five forces rather than as a force of its own.
When to Use Porter's Five Forces
Evaluating industry attractiveness for investment
Problem it solves: Determines whether an industry's structural characteristics support sustained profitability.
Real-world application
A venture capital firm uses Five Forces to screen industries before allocating funds — avoiding sectors with high rivalry and low barriers to entry.
Developing competitive strategy
Problem it solves: Identifies which competitive forces to address and how to position the firm defensively or offensively.
Real-world application
A SaaS company discovered high buyer power was compressing margins, leading them to invest in switching costs through deeper platform integration.
Anticipating industry disruption
Problem it solves: Reveals vulnerabilities in industry structure that could be exploited by new entrants or substitutes.
Real-world application
Traditional taxi companies that analyzed Five Forces in 2010 would have seen that their protection rested on regulatory entry barriers such as medallion limits rather than on customer loyalty — the weakness Uber later exploited.
Don't confuse Five Forces with competitor analysis. Five Forces analyzes the structure of the entire industry, not individual competitors.
How to Apply Porter's Five Forces: Step by Step
Before you start
- →Clear definition of the industry boundaries
- →Market data on competitors, suppliers, and customers
- →Understanding of regulatory and technology trends
Define the Industry
Clearly scope the industry you are analyzing — too broad and the analysis becomes meaningless.
Tips
- ✓Define by product/service type, geography, and customer segment
Common mistakes
- ✗Defining the industry too broadly or too narrowly
Analyze Each Force
Systematically evaluate each of the five forces using relevant data and indicators.
Tips
- ✓Use specific metrics: concentration ratios, switching costs, capital requirements
Common mistakes
- ✗Relying on gut feel instead of structural indicators
Rate Force Intensity
Rate each force as High, Medium, or Low based on your analysis.
Tips
- ✓Create a visual summary showing all five forces and their intensity
Common mistakes
- ✗Treating forces as binary — they exist on a spectrum
Assess Overall Industry Attractiveness
Synthesize the five forces into a holistic view of industry profitability potential.
Tips
- ✓Look at how forces interact — high buyer power plus many substitutes is worse than either alone
Common mistakes
- ✗Looking at forces in isolation without considering interactions
Develop Strategic Implications
Determine how to position your organization to mitigate strong forces and exploit weak ones.
Tips
- ✓Focus on forces you can influence — some are structural and unchangeable
Common mistakes
- ✗Stopping at analysis without generating strategic actions
Value & Outcomes
Primary benefit
Reveals the structural determinants of industry profitability, helping leaders make informed strategic choices.
Additional benefits
- ✓Provides a common framework for discussing competitive dynamics
- ✓Helps anticipate shifts in industry structure
- ✓Supports investment and market entry decisions
What you'll learn
- →How to analyze the structural drivers of competition
- →How to assess industry attractiveness objectively
- →How to develop strategies that address competitive forces
Typical outcomes
Best Practices
📋 Preparation
- •Define industry boundaries precisely
- •Gather quantitative data on market shares, pricing trends, and entry barriers
🚀 Execution
- •Analyze each force independently before synthesizing
- •Use specific indicators, not generalizations
🔄 Follow-Up
- •Revisit annually or when significant industry changes occur
- •Monitor forces that are shifting from weak to strong
💎 Pro Tips
- •Compare your Five Forces analysis across time periods to identify structural shifts
Rate each force as High, Medium, or Low. Industries where all five forces are weak tend to be highly profitable — think about why and whether that's sustainable.
The airline industry is a classic Five Forces case study: intense rivalry (many carriers, low differentiation), high buyer power (price-sensitive travelers with easy comparison), significant supplier power (Boeing and Airbus duopoly), threat of substitutes (video conferencing, high-speed rail), and a steady threat of new entrants, since aircraft can be leased rather than bought. This structural analysis explains why airlines historically earn below-average returns despite massive revenues.
Limitations & Pitfalls
Assumes relatively stable industry structures — less useful in rapidly changing industries
Mitigation: Supplement with scenario planning for dynamic industries
Does not account for complementors (firms that add value to your offering)
Mitigation: Use the Value Net framework to incorporate complementors
Focuses on threats rather than collaboration opportunities
Mitigation: Balance with stakeholder analysis and ecosystem thinking
Where this comes fromMichael E. Porter, in How Competitive Forces Shape Strategy (1979).
Porter's Five Forces through other lenses
Same concept, different angle — explore how Porter's Five Forces fits across Stratrix.
More Management Frameworks
Other frameworks in the Stratrix library.
Ansoff Matrix
A growth strategy framework that presents four strategic options — Market Penetration, Market Development, Product Development, and Diversification — based on whether the organization pursues existing or new products in existing or new markets.
Strategic AnalysisScenario Planning
A strategic foresight methodology that develops multiple plausible future scenarios to test strategies, prepare for uncertainty, and make more resilient decisions in complex, unpredictable environments.
Strategic AnalysisVRIO Framework
A resource-based framework that evaluates whether organizational resources and capabilities are Valuable, Rare, costly to Imitate, and supported by the Organization — determining if they provide sustained competitive advantage.
Risk & GovernanceFMEA
A systematic method for identifying potential failure modes in a product, process, or system, analyzing their effects, and prioritizing actions to prevent or mitigate failures.
Leadership & TalentRadical Candor
A feedback and management framework built on two dimensions: caring personally about people while challenging them directly, creating a culture of kind but honest communication.
Marketing & CustomerCustomer Journey Mapping
A visual representation of every interaction a customer has with your brand across all touchpoints and channels, from initial awareness through purchase to post-purchase, revealing pain points and opportunities for improvement.
More from Stratrix
The Strategist’s Craft
The methods behind the job: the planning cycle, initiative charters, decision rights, the memo that gets a yes.
Methods and templatesStart with the craft →Test a decision, free
Set a live decision against the companies that made it before you.
AcquisitionsThe Distance TestDivestituresThe Divestiture TestDiversificationThe Diversification TestMake or buyThe Make-or-Buy TestNew analyses, by email
The defining moves in business, checked against the record, as they publish.
See Porter's Five Forces in the wild.
Follow Porter's Five Forces across the companies and lenses where it actually shaped the strategy — the decision, the rationale, and how it played out.