Why a Software Firm Keeps 70 Cents and a Grocer Keeps 2

A software company can keep 70 cents of every dollar it earns. A grocery store fights to keep two.

Same word, “profit.” Wildly different machines underneath. And the reason isn’t luck, hustle, or even how good the product is. It comes down to a handful of forces that quietly govern every business on earth.

Underneath it all, a business is a simple machine: it spends money to make something, then sells it for more than it spent. The gap is profit. But almost every interesting question hides inside that one sentence. What does it cost to make one more? What price should you charge? And once you’re making money, what stops a rival from taking it? Let’s build the whole answer from the ground up.

Why this matters

You don’t need to run a company for this to pay off.

If you ever buy anything, these forces decide what you pay. If you ever invest, they separate the businesses that last from the ones that flame out. If you ever ask for a raise, sell a service, or price a side project, they tell you what your work is actually worth.

Most people guess at all of this. A few understand the machinery and make better decisions for it. By the end of this article you’ll be in the second group.

Costs: the foundation everything sits on

Start with two kinds of cost, because the rest of business stands on this one distinction.

• Fixed costs don’t change with how much you produce, at least in the short run. Rent, salaries, machinery, insurance. You pay the rent whether you sell one cake or a thousand.
• Variable costs scale with each unit. Flour and eggs for the cake, packaging, shipping, the wage of the worker who bakes it.

Add them together and you get total cost. Simple so far.

The number that really matters, though, is marginal cost: the cost of producing one more unit. This is the single most important figure in any pricing decision, and it’s where economics gets surprising.

For a physical cake, marginal cost is mostly ingredients. Making one more always costs real money. But for a digital good, marginal cost is almost zero. One more Spotify stream, one more app download, one more Google search costs a sliver of a cent. That single fact explains the whole software economy: once you’ve paid the fixed cost of building the product, every extra sale is nearly pure gain.

Think of a toll bridge. The fixed cost is the toll you pay to open the bridge each morning. The variable cost is the gas each car burns crossing it. If almost nobody crosses, the toll crushes you. If a million cars cross, the toll splits a million ways and barely registers. That splitting is the heart of “scale.”

The U-shaped curve: why bigger is better, until it isn’t

Divide total cost by the number of units and you get average total cost - the cost per unit. As you make more, the fixed cost spreads over more units, so cost per unit falls.

But push past your capacity (overtime pay, crowded machines, rushed mistakes) and cost per unit climbs again. Plot it and you get the famous U-shaped cost curve: expensive when you make too little, cheapest in a sweet spot in the middle, expensive again when you overstretch.

The bottom of that U has a name: minimum efficient scale, the smallest output where your cost per unit bottoms out.

When that low-cost stretch runs wide, you get economies of scale - bulk discounts on materials, dedicated machinery, research costs spread over millions of units. Walmart and Amazon are the textbook cases. Their sheer volume lets them buy and ship cheaper than anyone, which lets them charge less, which brings more volume. A reinforcing loop that’s brutally hard to break into.

But bigger isn’t infinitely better. Past a point you hit diseconomies of scale: bureaucracy, slow decisions, layers of managers who don’t talk to each other. The chain is real. More people means more coordination, which means slower decisions and duplicated work, which pushes cost per unit back up despite the size.

Revenue, profit, and the truth that margin reveals

Revenue is price times quantity, the total money coming in. Profit is revenue minus total cost, what’s left after paying for everything. Easy.

The subtlety lives in margin, the ratios that show how healthy a business really is.

• Gross margin = (revenue − cost of goods sold) ÷ revenue. The profit on the product itself, before overhead.
• Net margin = net profit ÷ revenue. What you keep after everything.
• Contribution margin = price − variable cost per unit. The dollars each sale chips in toward covering your fixed costs.

Here’s the contrast that should reshape how you see companies. Grocery retail runs on razor-thin net margins. Walmart keeps roughly 2-3 cents of every dollar. A software firm often runs 70-80% gross margins because its marginal cost is near zero.

The grocer survives on volume. The software firm survives on margin. Same word “profit,” two completely different machines.

Common misconceptions

A few myths quietly cost people money and bad decisions. Worth clearing up.

Myth: high revenue means high profit. It doesn’t. Revenue is the top line, and it’s easy to grow by selling cheaply. Profit is the bottom line, what actually feeds the owners. Amazon ran losses or razor-thin profits for years while pouring revenue into growth. Uber lost money for roughly a decade. Big top line, no bottom line.

Myth: sunk costs should factor into your decision. A sunk cost is money already spent that you can’t get back. It should be ignored in any forward-looking choice, yet people do the opposite all the time: “We’ve poured two years into this, we can’t quit now.” The two years are gone either way. The only real question is whether the next dollar is worth spending. Good decision-makers ask “what now?”, not “what already?”

Myth: a higher price abroad means you’re being ripped off. Usually it’s rational segmentation, which we’ll get to. A drug sold far cheaper in India than the US isn’t charity gone wrong. It lets the maker serve a poorer market it would otherwise abandon, while still profiting where incomes are higher.

Break-even: the line between loss and profit

Before a business makes a single cent of profit, it has to earn back its fixed costs. The point where revenue exactly covers all costs is the break-even point, and the formula leans on contribution margin:

Break-even units = fixed costs ÷ contribution margin per unit

Work an example. Say fixed costs are $100,000, you sell at $50 a unit, and each unit costs $30 to make. Your contribution margin is $50 − $30 = $20 per unit.

Break-even = $100,000 ÷ $20 = 5,000 units.

Below 5,000 units you lose money. Above it, each extra sale adds $20 of pure profit.

Now here’s the tension that haunts every price cut. Drop the price from $50 to $45 to win more customers, and your contribution margin falls from $20 to $15. Your break-even rises from 5,000 to about 6,667 units. You now need a third more sales just to stand still.

Cutting price always raises the volume you need. Sometimes that’s worth it. Often it isn’t. Contribution margin per unit is the engine here: anything that shrinks it (a price cut, a pricier supplier) raises the mountain you have to climb.

How firms actually set prices

There are four main approaches, and the smartest firms blend them.

1. Cost-plus pricing

Take your cost, add a percentage. A builder who spends $200 on materials and marks up 40% charges $280. Restaurants target a “food cost” around 30%, pricing a dish at roughly three times the ingredients.

It’s simple and everywhere. But it has a blind spot: it ignores what customers will actually pay. You can leave huge money on the table, or price yourself right out of the market.

2. Value-based pricing

Price to the perceived value to the buyer, not your cost. Software that saves a company 100 hours of labour can charge thousands even if it costs almost nothing to serve one more user. A medicine that saves a life isn’t priced from the cost of the pill.

This is where the fattest margins live. You’re paid for the value you create, not the effort you spent.

3. Competition-based pricing

Set your price relative to rivals: match them, undercut them, or charge a premium. This dominates commodity and price-transparent markets where buyers can easily compare, like fuel, flights, and basic electronics.

4. Price discrimination

Charging different buyers different prices for nearly the same thing. It sounds unfair, but it lets a firm serve both rich and poor customers profitably. There are three flavours:

• First degree - each buyer’s personal maximum. Haggling at a bazaar, or some AI-set personalised prices.
• Second degree - by quantity or version. Bulk discounts, or software tiers like Basic, Pro, and Enterprise.
• Third degree - by identifiable group. Student and senior discounts, regional pricing, airline business-versus-leisure fares.

Airlines are the masters. The same seat can sell at dozens of fares depending on when you book and whether it’s refundable. But price discrimination only works if the firm can do two things: segment buyers, and prevent resale. If a student could resell their cheap ticket to a businessman, the whole scheme collapses. That resale loophole is called arbitrage, and blocking it (region-locked software, non-transferable tickets) is essential.

Dynamic pricing and the fairness trap

Dynamic pricing means prices move with demand, time, and inventory. Done well, the discipline is called yield management, invented by airlines after US deregulation in 1978. Uber’s surge pricing is the modern icon. (One distinction worth keeping: surge only goes up, while dynamic can move either direction.)

Here’s the lesson that catches companies off guard, told through one short story.

In February 2024, news broke that Wendy’s would test “dynamic pricing.” Headlines screamed “Uber-style surge pricing on burgers.” #BoycottWendys trended. Burger King ran a cheeky “No urge to surge” promo.

Within days Wendy’s clarified it actually meant lowering prices in slow hours, not raising them at lunch rush. The economics were fine. The perception wasn’t.

People happily accept dynamic pricing for flights, hotels, and concert tickets, yet expect a stable everyday price from fast food. The takeaway: fairness perception can matter as much as the math. The exact same tool gets welcomed in one market and rejected in another.

Competitive moats: defending the profit you’ve earned

So you’ve found a profitable business. Now the hard part: keeping it. A moat is a durable structural advantage that protects a firm’s profits from competitors, a term Warren Buffett popularised in his 1990s shareholder letters. There are five classic kinds.

• Network effects - the product gets more valuable as more people use it. Visa, social networks, marketplaces. Each new user pulls in the next.
• Switching costs - painful or expensive to leave. Enterprise software your whole staff is trained on, or a bank holding all your records.
• Cost or scale advantage - you simply make or deliver it cheaper. Walmart, Amazon, GEICO’s direct-to-customer model.
• Intangible assets - brands, patents, regulatory licences. The Coca-Cola name, a pharma company’s 20-year drug patent.
• Efficient scale - a market just big enough for one or two players, so nobody else bothers entering. A pipeline, or a regional utility.

Why competition eats profit alive

Without a moat, profit is borrowed time. The chain is relentless:

1. High profits in a market attract attention.
2. New competitors rush in, chasing the money.
3. Supply rises and products get copied.
4. Prices fall toward marginal cost.
5. Economic profit drifts toward zero.

Economist Joseph Schumpeter called this churn creative destruction back in 1942: the new constantly devours the old.

Economists frame the extremes as perfect competition (many sellers, identical product, free entry, like commodity wheat where each farmer is a price-taker) versus monopoly (one seller, a price-maker). Reality usually sits in between, in monopolistic competition (many sellers of differentiated products, like restaurants and salons) or oligopoly (a few giants, like airlines, telecom, soft drinks).

Differentiation and moats are exactly how a firm escapes the zero-profit trap.

Why the same product costs different prices in different countries

Pick up an iPhone and its price swings wildly by country. An iPhone 16 Pro ranges from roughly €900 in South Korea to about €1,850 in Turkey. Several causes stack on top of each other:

1. Willingness to pay. Firms price to local incomes, which is geographic third-degree price discrimination. The idea that a sum of money should buy the same basket everywhere is called purchasing power parity. In reality it doesn’t, and firms exploit the gaps.
2. Taxes and tariffs. A tariff is a tax on imports; VAT is a sales tax. Turkey stacks a culture fee, a broadcast levy, a roughly 50% special consumption tax, and 20% VAT, pushing the effective tax above 100% of the base price. Nordic countries carry around 25% VAT.
3. Local costs. Wages, rent, and logistics differ everywhere.
4. Currency strength. Exchange-rate swings move prices even when nothing else changes.
5. Arbitrage prevention. Region-locked variants stop people buying cheap and reselling dear.

Two playful gauges make this visible. The Big Mac Index (from The Economist, launched 1986) compares the price of the identical burger worldwide. Switzerland is consistently the priciest, around $8 versus roughly $6 in the US, not because the franc is “wrong” but because Swiss wages, rents, and food standards are high. Picodi’s “iPhone Index” measures the same idea in work-days: a phone costs roughly 4 days of work in Switzerland versus around 73 in Turkey.

So a single product’s price in any country is a stack: base cost, plus local wages and rent, plus taxes and tariffs, plus currency, plus how much locals will pay. Change any layer and the shelf price changes, even when the product is identical.

How to use this

You can put all of this to work today. Five concrete moves:

1. Find the marginal cost of anything you sell. Ask what one more unit truly costs. If it’s near zero (digital products, content, software), you should be thinking about value and scale, not cost-plus pennies.
2. Calculate your break-even before you cut a price. Divide fixed costs by your contribution margin per unit. Then recompute it at the lower price. If the new volume you’d need feels unreachable, don’t cut.
3. Price to value, not effort. Before defaulting to “cost plus a markup,” ask what the buyer actually gains. The gap between your cost and their benefit is the money you’re leaving on the table.
4. Stress-test the fairness, not just the math. Before any dynamic or variable pricing, ask whether customers will see it as smart or as gouging. Remember Wendy’s.
5. For any business you’d invest in, join, or start, ask one question: what stops a competitor from copying this and competing the profit away? If there’s no honest answer, today’s fat margins are running on a timer.

Conclusion

If you remember one thing, make it this: profit is never the same as profit. A grocer’s two cents and a software firm’s seventy come from entirely different machines, and the difference is marginal cost, margin, and whether a moat is keeping rivals out.

Once you can see those gears turning, prices stop looking arbitrary. The surge fare, the regional iPhone, the bargain enterprise tier, the burger chain’s PR disaster all start to make sense.

Here’s the loose thread worth pulling next. Everything above assumes the firm gets to set its price. But where does the customer’s willingness to pay actually come from in the first place? That question takes you into supply and demand, where prices aren’t chosen by anyone but emerge from millions of people quietly bidding against each other.