Every business competes within an industry, and industries differ enormously in how profitable they are. Some allow most competitors to earn healthy returns. In others, even good operators struggle. Much of that difference comes not from individual companies’ efforts but from the structure of the industry itself: how intense rivalry is, how much power suppliers and customers hold, how easily newcomers can enter and how readily customers can switch to substitutes.
Harvard professor Michael Porter set out this idea in a 1979 Harvard Business Review article and his 1980 book Competitive Strategy. His five forces framework remains one of the most useful tools for understanding an industry, and his generic strategies remain a clear way to think about how to compete within it. Both apply to small businesses as much as to multinationals.
This article explains the five forces with practical questions, illustrates them with a global fast-food chain, sets out the generic strategies with examples, shows how to choose a strategy and suggests simple ways to monitor competitors.
The five forces
1. Competitive rivalry
How many competitors are there, how strong are they and how aggressively do they compete? Rivalry tends to be intense when:
- There are many competitors of similar size.
- The industry is growing slowly, so growth comes by taking share.
- Products are similar, so customers choose on price.
- Fixed costs are high, so firms cut prices to fill capacity.
- Exit is difficult, so struggling firms stay and compete.
When rivalry is strong, businesses must work harder to win customers, through sharper pricing, needs-based services and effective marketing. Otherwise customers go elsewhere, and suppliers may favour rivals who offer them better deals. When rivalry is weak, and especially when you have a unique proposition and innovative products, you can earn good margins.
A global fast-food chain faces intense rivalry from other burger, chicken, pizza and coffee chains and countless local outlets. Its responses include very competitive entry-level pricing and localised menus, for example vegetarian and spicier options suited to Indian tastes.
2. Bargaining power of suppliers
How much power do your suppliers have to raise prices, reduce quality or change terms? Supplier power is high when:
- There are few suppliers, or one dominant supplier.
- Their input is critical and has no substitute.
- Switching suppliers is costly or slow.
- Suppliers could integrate forward and compete with you.
High supplier power squeezes your margins. If you have many alternative suppliers, you can switch when one raises prices. The fast-food chain has many potential suppliers for most inputs, which limits their power. Its suppliers also do not control the distribution network that delivers products to restaurants.
3. Bargaining power of buyers
How much power do your customers have to push down prices or demand more? Buyer power is high when:
- Customers are few or large relative to you.
- They buy in large volumes.
- Products are standardised, so switching is easy.
- Customers are price-sensitive or could make the product themselves.
- Customers have good information about prices and alternatives.
If a few customers account for most of your revenue, they hold considerable power over price and terms. A broad customer base spreads that power. Fast-food customers individually have little power, but collectively they have many choices, so the chain must set prices and quality according to their tastes and preferences.
4. Threat of new entrants
How easily could new competitors enter your market? The easier entry is, the more your share and margins are at risk. Barriers to entry include:
- Cost advantages of established firms.
- Access to inputs and distribution channels.
- Economies of scale that newcomers cannot match quickly.
- Strong brand identity and customer loyalty.
- Capital requirements.
- Regulation, licences and certifications.
- Proprietary technology and know-how, which is one reason to protect intellectual property.
For the fast-food chain, the threat of new entry is moderate. Starting a small fast-food business is relatively cheap, but matching the chain’s brand, scale and loyal customer base is very difficult.
5. Threat of substitutes
How easily can customers meet the same need in a different way? Substitutes are not direct competitors but alternatives. A home-cooked meal substitutes for takeaway. Video calls substitute for some business travel. A redesigned assembly that eliminates a fastener substitutes for the fastener. The threat is higher when substitutes offer good value and switching is easy and cheap, both immediately and over time.
Using the five forces
Industry growth, regulation and technological change also matter, but Porter argued that the five forces are the enduring structural drivers of profitability in every industry. Understanding them helps you:
- Judge how attractive an industry or segment is.
- See where pressure on your margins comes from.
- Decide where to invest, such as building barriers, diversifying suppliers, broadening your customer base or differentiating against substitutes.
- Anticipate how the industry may change.
Assessing the forces for your business
For a small business, a simple assessment is often enough:
| Force | Key questions | Rating (low/medium/high) |
|---|---|---|
| Rivalry | How many competitors? How similar? How price-driven? | |
| Supplier power | How many suppliers? How critical? How easy to switch? | |
| Buyer power | How concentrated are customers? How easily can they switch? | |
| Threat of entry | How easy is it to start competing with us? | |
| Threat of substitutes | What alternatives solve the same problem? |
High ratings show where profits are under pressure and where strategy needs attention.
Porter’s generic strategies
Porter argued that firms achieve competitive advantage in one of a few broad ways, depending on whether they compete on cost or differentiation, and across a broad market or a narrow focus:
| Lower cost | Differentiation | |
|---|---|---|
| Broad market | Cost leadership | Differentiation |
| Narrow market | Cost focus | Differentiation focus |
Cost leadership
Become the lowest-cost producer in the market, appealing to price-conscious customers. Ways to achieve it include:
- High asset turnover: serving more customers with the same assets, such as fast table turnover in a restaurant or quick turnarounds in a taxi service.
- Economies of scale: buying and producing in large volumes to reduce unit costs. Large discount retailers use this approach.
- Technology that reduces cost and increases productivity.
- Minimal overheads.
- Hard negotiation with suppliers.
- Lower-cost locations for rent, utilities and labour.
Low-cost airlines are classic examples: simple service, high aircraft utilisation and low prices for customers who do not need full-service extras. Some detergent brands have won large markets by keeping manufacturing and overhead costs exceptionally low.
Cost leadership usually requires scale, so it is difficult for most small businesses to pursue across a broad market.
Differentiation
Offer something customers value and competitors do not, such as superior features, design, quality, durability, service, speed or brand, and charge a premium for it. Technology companies that launch genuinely new products with outstanding design can command high prices, sustained by research, quality, brand and distribution. Watchmakers that move from basic durability to style and design can raise prices while still offering value compared with luxury brands.
Cost focus
Offer low prices to a specific, narrow segment. Examples include take-and-bake pizza businesses that avoid restaurant overheads, regional low-cost airlines on selected routes, and online furniture retailers targeting young working couples who prefer ordering online at lower prices than showrooms.
Differentiation focus
Offer something distinctive to a specific, narrow segment willing to pay for it. Craft breweries, organic food producers and specialist engineering firms serving particular industries all fit this pattern. Customer loyalty within the niche can be very strong.
Why focus strategies suit small businesses
Most small businesses cannot be the lowest-cost producer across a whole market, and broad differentiation requires significant resources. Focus strategies let them compete by understanding a specific segment’s needs better than larger competitors. A small firm can be the best choice for a particular type of customer, region, application or problem.
Avoid being stuck in the middle
Porter warned that firms trying to be everything to everyone, neither the cheapest nor clearly different, risk being “stuck in the middle” with no clear advantage. Many small businesses drift into this position by chasing every enquiry. Choosing a clear strategy, and saying no to work that does not fit it, is often the hardest and most valuable strategic decision.
Choosing your strategy
- Analyse yourself: a SWOT analysis shows which strengths could support cost or differentiation advantages.
- Analyse the industry: the five forces show where pressure lies and where opportunities exist.
- Study customers and segments: which groups are underserved? Which value what you do best?
- Study competitors and prices: where are they strong, and where are there gaps?
- Choose the strategy that best increases customer value and your revenue, and align operations, pricing, marketing and investment with it.
Monitoring competitors
Strategy needs ongoing awareness of competitors. Simple, low-cost methods include:
- Online alerts for your company name, competitors’ names, products, industry terms and location, which notify you when they appear online.
- Search engine optimisation tools, which show which keywords competitors rank for, their traffic sources and the content that attracts links.
- Content analysis tools, which reveal what topics and formats perform best in your industry.
- Social media analytics and listening tools, which compare engagement and track what customers say about competitors.
- All-in-one digital marketing platforms, which combine keyword, advertising and competitor analysis.
- Old-fashioned methods: competitors’ websites, price lists, trade shows, job advertisements, customer conversations and supplier gossip.
Choose one or two tools that fit your business, and review competitor information regularly, for example quarterly, as part of strategy reviews. Learn from competitors, but do not simply copy them. Competition is most useful as a push to improve.
Improving your position against each force
Small businesses cannot change an industry’s structure, but they can improve their position within it:
- Against rivalry: differentiate, specialise in a niche, build relationships and service that competitors find hard to match, and avoid price wars you cannot win.
- Against supplier power: qualify alternative suppliers, standardise inputs where possible, join buying groups, or agree longer-term contracts that secure supply and price.
- Against buyer power: broaden your customer base, increase switching costs through integration, documentation and service, and offer value that customers cannot easily get elsewhere.
- Against new entrants: build brand, reputation, certifications, specialist know-how and customer relationships that take years to replicate.
- Against substitutes: understand the underlying customer need, improve your value relative to alternatives, or add the substitute to your own offer.
A worked example
A small precision machining business analyses its industry. Rivalry is high for standard parts, with many local shops and imports competing on price. Supplier power is low, because metal is widely available. Buyer power is high, because several large customers account for most revenue and could switch to other shops. The threat of entry is moderate, because machines are expensive but used equipment is available. The threat of substitutes is rising, because some customers are adopting additive manufacturing for prototypes.
The business concludes that competing on cost for standard parts is a losing strategy. It chooses differentiation focus: complex, tight-tolerance parts for medical and scientific equipment makers, where quality systems, inspection capability and fast engineering support matter more than price. It invests in inspection equipment and documentation, diversifies its customer base within the niche to reduce buyer power, and adds additive manufacturing for prototypes, turning a substitute into a complementary service. Margins and customer loyalty improve.
Frequently asked questions
Is the five forces model still relevant in a digital economy? Yes. Digital platforms change the strength of the forces, for example by lowering barriers to entry and increasing buyers’ access to information, but the forces themselves still explain where profits are made and lost.
What about complementors? Some strategists add a sixth consideration: complementors, meaning businesses whose products make yours more valuable, such as software that works with your hardware. Partnerships with complementors can strengthen your position.
Can a business pursue more than one generic strategy? Some do, with separate business units or brands for different segments. Within one offer, though, trying to be both cheapest and most differentiated usually leads to being stuck in the middle.
Summary
Porter’s five forces of rivalry, supplier power, buyer power, threat of entry and threat of substitutes explain why some industries and segments are more profitable than others, and where pressure on your margins comes from. His generic strategies of cost leadership, differentiation, cost focus and differentiation focus describe the main ways to build advantage. Small businesses usually win through focus, by serving a specific segment better than anyone else. Use SWOT, the five forces and customer and competitor insight to choose a clear strategy, avoid being stuck in the middle, and monitor competitors regularly.
Sources: small-business training notes on Porter’s five forces, Porter’s generic competitive strategies and competitor analysis tools, together with Michael Porter’s published work (1979 and 1980). Examples are illustrations.
