Porter's Five Forces Explained with Real World Examples

Porter's Five Forces explained: what the model actually tells you (and what it doesn't)

A client once asked me to "run a Porter's Five Forces" on their market. Two hours later I handed back a slide with five arrows and a sentence saying the industry was "moderately attractive." They looked at it, nodded politely, and I could see the exact thought behind their eyes: we paid for this?

That was my fault, not the model's. Porter's Five Forces is one of the few strategy frameworks from the early 1980s that still earns its place, but only if you treat it as a way to explain where the money in an industry goes — and where it leaks out. Used as a checkbox exercise, it produces exactly the kind of bland slide I handed over that afternoon.

So here's how to use it properly, with real company examples, the numbers that matter per force, and the honest limits nobody puts on the diagram.

What is the purpose of Porter's Five Forces analysis?

The purpose is to answer one question before you invest a euro, a hire, or three years of your life: is this industry structurally capable of producing good profits, and who captures them?

Michael Porter introduced the framework at the start of the 1980s, at a moment when most strategy writing focused on the internal strengths of a firm. His argument was blunt: companies don't fail mainly because they execute badly. They fail because they compete in a structure that quietly transfers their profits to suppliers, customers, or new entrants.

That distinction matters more than it sounds. A great operator in a bad structure will lose to a mediocre operator in a good one, most of the time. I've watched this play out in two software niches at once — one where customers could switch tools in an afternoon, one where switching meant re-migrating five years of data. Same product quality. Wildly different margins.

It is not a company audit

The most common mistake is running the five forces on your own business. Don't. The unit of analysis is the industry — the arena where you compete. Only after you understand the arena do you ask whether your specific position inside it is defensible.

The five forces, in one paragraph

• Supplier power — can your suppliers squeeze your margin by raising prices or restricting supply?
• Buyer power — can your customers force prices down or demand more for the same money?
• Threat of new entrants — how easy is it for someone new to show up and take your customers?
• Threat of substitutes — can buyers solve the same job with something entirely different?
• Competitive rivalry — how brutal is the fight among existing players for the same demand?

Read that list again and notice something. Three of the five forces aren't about your competitors at all. Suppliers, buyers, and substitutes rarely appear on a competitor slide, yet they typically decide who keeps the profit.

Porter's Five Forces example: Starbucks

Starbucks is a useful case because the company sits in a category that looks commoditized — coffee — yet has historically sustained margins that commodity players can't touch. That gap is exactly what the framework explains.

Supplier power: low, and deliberately so

Coffee beans are grown by millions of smallholders scattered across dozens of countries. No single farm, or even a single producing nation, can dictate terms to a chain of Starbucks' size. Fragmented supply plus a concentrated buyer equals weak supplier power.

Starbucks reinforced that imbalance on purpose, through long-term contracts, farmer support programs, and its own buying operation. It also hedges coffee prices on futures markets, which smooths input costs. When I looked at this for a client in food retail, the lesson was clear: the buyer who can walk away from any individual supplier always wins the negotiation.

Buyer power: individually weak, collectively loud

You buy one latte. You have no leverage. But look at the other buyers: airport concessions, licensed stores inside supermarkets and hotels, corporate catering contracts. Those are concentrated, contract-driven, and far more demanding on price.

So the force splits. Retail customers are weak individually but price-sensitive in aggregate, which is why the company leans on loyalty programs and mobile ordering to reduce the number of decisions a customer makes elsewhere. Every point of friction you remove from a purchase is a point of buyer power you take away.

Threat of new entrants: high at the bottom, low at the top

Anyone can open a coffee shop. The capital needed is modest, the equipment is standard, and a lease is a lease. That means the low end of the market is permanently contested — independent cafés open and close constantly.

What's hard to replicate is not the coffee. It's the real estate footprint in high-traffic locations, the brand recognition, the supply chain, and the app with tens of millions of users. Those are the barriers. The product itself is not one.

Threat of substitutes: the force that keeps executives awake

Energy drinks, bubble tea, bottled water, a soft drink from the fridge, or simply brewing at home. Starbucks isn't competing with other coffee chains so much as with the entire set of ways a person can get caffeine or a moment of calm. Price elasticity here is real: when disposable income tightens, home brewing wins.

Competitive rivalry: intense and getting worse

Dunkin', Costa, Tim Hortons, McDonald's McCafé, and regional chains all fight for the same morning routine. Add local specialty roasters competing on quality and provenance, and you have a market where differentiation is the only escape from price competition.

Force	Intensity for Starbucks	Main reason
Supplier power	Low	Fragmented growers, hedging, long-term contracts
Buyer power	Low to moderate	Weak retail buyers, stronger licensed partners
New entrants	Moderate	Cheap to open, expensive to scale brand and locations
Substitutes	High	Energy drinks, tea, home brewing, other habits
Rivalry	High	Global chains and local roasters fighting for daily routines

The strategic conclusion isn't "coffee is attractive." It's narrower: coffee is structurally unattractive except for the player who owns the brand, the real estate, and the ordering habit. That is the position Starbucks built, and it's why the framework is worth running.

Porter's Five Forces example: Coca-Cola

Now compare a beverage business with a completely different force profile. Coca-Cola sells a product that costs cents to produce and sells for a multiple of that — which only makes sense if you look at the structure around it.

Supplier power: very low

Sugar, water, glass, aluminium, and caffeine are all available from a large pool of suppliers. The concentrate formula is proprietary and produced in-house, which removes the single ingredient that mattered most. Aluminium prices swing, but so do the prices of many commodities, and the company hedges accordingly.

Buyer power: concentrated, and that's the catch

This is where the blind spot sits. In most markets, a handful of grocery chains and foodservice distributors control the shelves and the fridges. They negotiate hard, demand promotional support, and can delist a product line if terms don't work.

So buyer power for Coca-Cola is moderate to high, not low — despite the brand. That's a nuance the popular version of this example tends to skip. The bottling partners add another layer: they're buyers of concentrate and sellers to retailers, and their economics are far thinner than the brand owner's.

Threat of new entrants: low for cola, higher for everything else

Launching a rival cola is close to impossible. Distribution, shelf space, advertising budgets, and decades of habit form a wall. But launching a new sparkling water, kombucha, or energy drink is entirely feasible — and the big players themselves fund that route, buying up small brands rather than fighting them.

Threat of substitutes: the structural threat of the decade

Water. That's the substitute. As health-consciousness pushed consumers away from sugary drinks, bottled water and low-calorie alternatives took volume that used to belong to carbonated soft drinks. No competitor did this to Coca-Cola; a shift in consumer preference did.

Competitive rivalry: duopoly with a crowded fringe

The cola category is effectively a two-player contest, which normally keeps rivalry contained. The wider soft-drink market is a different story: hundreds of brands, aggressive pricing, and constant promotional pressure in retail.

Put together, Coca-Cola's profile looks like this: weak suppliers, strong buyers, near-impenetrable entry barriers in its core category, a substitute threat that has already reshaped the portfolio, and contained rivalry at the top. High margins sustained over decades make sense once you see that combination.

How to measure each force instead of guessing

Here is the part that makes the difference between a useful analysis and a slide that gets ignored. Every force has a number underneath it.

1. Supplier power — what share of your input cost goes to your three largest suppliers? If it's above half, they own your margin.
2. Buyer power — what share of your revenue comes from your three largest customers? Anything above roughly a third is a structural risk.
3. New entrants — how much capital and time does it take to reach a viable scale? Months and thousands is an open door.
4. Substitutes — if your price rises 10%, how much volume walks to a different solution? That single elasticity number tells you more than a paragraph of prose.

On a real project, I scored each force from 1 to 5, weighted supplier and buyer power highest because they acted fastest, and ended up with a composite that predicted margin compression about two quarters before it showed up in the accounts. It wasn't elegant. It was right.

What a Porter's Five Forces PDF won't tell you

The downloadable templates are fine as a starting grid. What they leave out is the reasoning. A filled-in diagram with five arrows pointing sideways tells you nothing about which force is about to change.

Ask instead: is a supplier consolidating? Are your customers merging? Has a new regulation lowered entry costs? Is a substitute becoming cheaper or more socially acceptable? Those are the movements that reprice an industry, and they rarely appear in a template.

Where the model breaks down

I'll defend Porter's framework, but not blindly. It was designed for a world of relatively stable industry boundaries, and that world is gone in several sectors.

• It's static. One snapshot, no timeline. You have to run it repeatedly to see the direction of travel.
• Industry definitions are fuzzy. Is a streaming service competing with cinemas, video games, or sleep? The answer changes which forces apply.
• It underweights complementors. Some frameworks added a sixth force for partners whose products make yours more valuable. Porter himself resisted that addition; I think the criticism has merit in platform businesses.
• It says nothing about execution. Two firms in the same structure can perform very differently, and the model won't explain why.

None of that makes it obsolete. It makes it a starting point rather than a conclusion.

The question that matters more than the diagram

Drawing five arrows takes twenty minutes. The work is in deciding which force is currently moving, how fast, and whether your position protects you when it arrives.

Most companies I've seen run this analysis come away with a list of threats and no decision. The ones that get value do the opposite: they pick the single force most likely to erode their margin over the next two years, and they build the business around surviving it. Everything else on the diagram can wait.

So before you buy the template, answer one thing honestly. If your strongest force turned against you tomorrow, would you know it before it showed up in the numbers? If the answer is no, the diagram was never the problem.