How Do Supermarkets Make Money on Products With Tiny Profit Margins?
Walk through a supermarket and the business model can look almost impossible.
A carton of milk costs only a few dollars.
A loaf of bread may carry a tiny markup.
Shoppers compare prices aggressively.
Stores constantly run promotions.
Employees have to be paid.
Refrigerators operate 24 hours a day.
Food spoils.
Products are stolen or damaged.
Credit-card companies collect transaction fees.
Trucks continuously deliver fresh inventory.
And competitors may sit only a few streets away.
Yet enormous supermarket groups remain profitable.
How?
The answer is not that grocery stores secretly make enormous amounts on every product.
They usually do not.
The real power of supermarket profit margins comes from scale.
A supermarket might earn only a small amount from one carton of milk, but it does not sell one carton.
It sells thousands of products every day.
Large chains repeat those transactions across hundreds or thousands of stores.
They turn inventory rapidly.
They negotiate enormous supplier contracts.
They develop private-label brands.
Some receive supplier allowances.
Many operate pharmacies and fuel stations.
Increasingly, they sell advertising using their websites, apps and loyalty-program data.
A tiny percentage applied to a huge river of money can become a very large number.
That is the supermarket business model.
The Food Industry Association, FMI, reports that U.S. food retailers earned an average net profit of just 2.1% in 2025. At the same time, the average supermarket generated approximately $668,377 in sales every week. FMI’s current Food Industry Facts puts those two numbers side by side.
That tells us almost everything we need to know about supermarket profit margins.
The percentage is small.
The sales volume is enormous.
Supermarket Profit Margins at a Glance
| Profit Driver | How It Helps |
|---|---|
| Enormous sales volume | Tiny profits are repeated millions of times |
| Fast inventory turnover | Cash tied up in inventory returns quickly |
| Large purchasing scale | Chains can negotiate better buying terms |
| Private-label brands | More control over product, price and sourcing |
| Supplier allowances | Can reduce merchandise costs or support new products |
| Product mix | Some categories contribute more margin than others |
| Loyalty programs | Encourage repeat spending and personalized offers |
| Retail media | Brands pay supermarkets for advertising access |
| Pharmacies and fuel | Add traffic and alternative revenue |
| Efficient distribution | Lowers the cost of getting products onto shelves |
| Waste reduction | Small reductions in spoilage can materially affect profit |
| Scale | Fixed costs are spread across enormous revenue |
The most important thing is understanding the difference between gross margin and net profit margin.
Gross Margin and Net Profit Are Not the Same Thing
Suppose a supermarket buys a product from a supplier for $8.
It sells the product for $10.
That does not mean the supermarket made $2 of profit.
The $2 is closer to gross profit before many operating expenses.
The store still has to pay for:
employees;
electricity;
rent;
refrigeration;
distribution;
insurance;
technology;
credit-card fees;
cleaning;
security;
waste;
administration;
taxes.
Once all those expenses are deducted, only a small amount may remain as true profit.
This distinction is crucial when discussing supermarket profit margins.
Kroger provides a useful real-world example.
In fiscal 2025, the U.S. grocery giant reported a 22.9% gross margin on sales. But that number is nowhere near the amount the company ultimately keeps as profit because operating expenses must still be paid. Kroger’s 2025 annual filing shows merchandise costs, advertising, warehousing, transportation and operating expenses absorbing most of the revenue.
That is why saying:
“Supermarkets have a 20% margin”
can be very misleading.
Gross margin may be around that range for some operators.
Net supermarket profit margins can be only a few percent.
1. Supermarkets Make Tiny Profits Millions of Times
Imagine earning only a few cents from one transaction.
That sounds like a terrible business.
Now repeat the transaction one million times.
Suddenly it becomes interesting.
Large supermarkets process extraordinary transaction volumes.
Shoppers do not usually buy one product either.
Their carts might contain:
milk;
cereal;
bread;
meat;
vegetables;
toothpaste;
coffee;
snacks;
detergent;
drinks;
toilet paper.
Each item contributes a little to the economics of the entire basket.
A store therefore cares about basket size as much as the profit on one individual product.
This is the first secret behind supermarket profit margins.
A grocery store does not need to become rich from your bottle of ketchup.
It needs you to buy ketchup plus another 25 products—and return again next week.
FMI’s 2026 industry research continues to describe food retail as a historically narrow-margin business. The Food Retailing Industry Speaks 2026 emphasizes that retailers remain focused on efficiency precisely because there is little margin available for waste.
The business model is based on repetition.
2. Grocery Shopping Happens Again and Again
Supermarkets have another enormous advantage.
People cannot permanently stop buying food.
A household may delay purchasing:
a television;
new furniture;
a luxury handbag;
a car.
Food is different.
People continually need:
breakfast;
lunch;
dinner;
drinks;
cleaning products;
household essentials.
That produces frequent repeat traffic.
Many households visit a supermarket weekly or even several times a week.
This makes grocery retail a high-frequency business.
A supermarket earning a modest amount from one household can earn that amount repeatedly across an entire year.
Then multiply the pattern by:
thousands of local households;
hundreds of stores;
millions of customers.
Small supermarket profit margins begin generating substantial absolute profit.
This is also why grocery chains care so much about customer loyalty.
Getting you into the store once matters.
Getting you to return every week matters far more.
3. Fast Inventory Turnover Makes Thin Margins More Powerful
Imagine two stores.
Store A buys an item for $90 and sells it for $100 once a year.
Store B earns a much smaller percentage each time but repeatedly sells and replaces its inventory throughout the year.
Which model can generate more total return from the capital tied up in inventory?
Potentially Store B.
This is the importance of inventory turnover.
Grocery products move quickly.
Milk arrives and sells.
Bananas arrive and sell.
Bread arrives and sells.
Another shipment replaces them.
The same shelf space can generate revenue over and over.
Warehouse retailer Costco explicitly describes its own model as combining high sales volume and rapid inventory turnover with efficient purchasing and distribution, allowing it to operate profitably at substantially lower gross margins than many other retailers. Costco’s fiscal 2026 annual filing even notes that in some cases it sells inventory before payment to suppliers becomes due.
Traditional supermarkets differ from Costco, but the underlying principle is highly relevant.
Fast turnover makes thin margins more economically useful.
The News Ink’s detailed breakdown of the Costco business model shows how extreme scale and rapid inventory movement can turn low merchandise margins into billions of dollars.
4. Huge Chains Can Buy at Huge Scale
Suppose an independent grocery shop needs 100 cases of cereal.
A multinational supermarket chain may need millions.
Which customer matters more to the cereal manufacturer?
Scale changes negotiations.
Large retailers can negotiate over:
purchase prices;
packaging;
promotions;
delivery terms;
distribution;
product placement;
volume commitments.
A tiny reduction in purchasing cost may look irrelevant on one box.
Across billions of dollars of merchandise, it becomes substantial.
This is why supermarket profit margins depend heavily on procurement.
A grocer does not need to increase the shelf price to improve margin.
It can also reduce the amount it pays to obtain the product.
Costco’s filings explicitly identify volume purchasing and efficient distribution as key ingredients in its low-margin model.
Traditional supermarket chains use the same general economic power, though with much larger product assortments.
Scale therefore works twice:
more sales generate more profit;
and greater purchasing volume can improve the economics of each sale.
5. Private-Label Products Change the Equation
Look carefully around a modern supermarket.
Beside the famous cereal brand sits the supermarket’s own cereal.
Beside national-brand pasta is store-brand pasta.
Milk.
Frozen food.
Sauces.
Cleaning products.
Coffee.
Snacks.
Private-label products have become central to grocery economics.
Kroger says its own brands generated more than $39 billion in sales during 2025, with an average supermarket stocking more than 13,000 private-label items. Kroger’s annual filing shows just how large supermarket-owned brands have become.
Albertsons reported $16.9 billion in own-brand retail sales during fiscal 2025 across more than 14,000 products. Albertsons’ 2025 annual report describes brands ranging from Signature SELECT to O Organics.
Why are private labels attractive?
The supermarket controls much more of the commercial strategy.
It can decide:
specifications;
packaging;
positioning;
supplier;
price tier;
promotion.
There is also no competing retailer down the street selling exactly the same supermarket-exclusive brand.
Private labels can therefore improve customer loyalty while giving retailers another way to manage supermarket profit margins.
That does not mean every store-brand product automatically produces a larger margin than every national brand.
Product economics vary.
The real advantage is control and differentiation.
6. Not Every Product Has the Same Margin
A supermarket does not apply one universal markup to everything.
Different categories have different economics.
A retailer may accept very low margins on highly visible products because customers know their prices.
Milk.
Eggs.
Bread.
Bananas.
These products influence whether shoppers perceive the entire supermarket as cheap or expensive.
Other categories may contribute more gross margin.
Prepared foods.
Specialty products.
Premium private labels.
Flowers.
Bakery items.
Certain household products.
A supermarket therefore manages the entire product mix rather than demanding the same margin from every item.
One low-profit item can help bring the shopper into the building.
The store then earns money from the rest of the basket.
This helps explain why comparing one supermarket solely on the price of milk does not reveal its complete business model.
Supermarket pricing is portfolio economics.
7. Some Products Function Almost Like Advertising
Retailers sometimes deliberately price important products extremely aggressively.
Economists and retailers often discuss loss leaders—products priced unusually low to attract customers.
A shopper may come specifically because chicken is on promotion.
But once inside, they also purchase:
rice;
drinks;
dessert;
vegetables;
cleaning supplies.
The promotional chicken itself may contribute very little.
The basket can still be profitable.
This is why supermarket profit margins must be measured across the whole shopping trip.
The same psychology helps explain why supermarkets distribute weekly promotions and personalized digital coupons.
The objective is not necessarily maximizing the price of every product.
It is maximizing:
traffic;
basket value;
purchase frequency;
customer retention.
The supermarket wins when you keep choosing that store.
8. Suppliers Can Help Fund Promotions and Shelf Placement
The relationship between supermarkets and manufacturers is more complicated than:
retailer buys product;
retailer adds markup;
retailer sells product.
Suppliers may provide various allowances linked to:
promotions;
advertising;
product introductions;
distribution;
merchandising.
Kroger’s financial statements specifically disclose vendor allowances and explain that when possible they are applied to the cost of the related inventory, reducing merchandise cost as products are sold.
Another controversial practice is the slotting allowance.
The U.S. Federal Trade Commission defines a slotting allowance as a payment from a supplier to a retailer associated with initial product placement on shelves or access to warehouse space. The FTC’s grocery slotting-allowance investigation found substantial variation between categories and retailers.
Not every supermarket charges every supplier a slotting fee.
And not every supplier arrangement works the same way.
But these relationships demonstrate that supermarket profit margins cannot be understood purely by subtracting the wholesale price printed on an invoice from the shelf price.
Behind one shelf can sit an entire network of commercial agreements.
9. Spoilage Is a Profit Problem
A supermarket buys 100 boxes of strawberries.
If 100 sell, excellent.
If 15 spoil before anyone buys them, the supermarket effectively paid for inventory that produced no retail revenue.
That lost inventory is sometimes part of what retailers call shrink.
Shrink can also include:
theft;
damage;
administrative errors;
supplier issues;
expired stock.
Because supermarket profit margins are so thin, small changes in shrink can matter enormously.
A company operating on a 2% net margin cannot casually lose several additional percentage points of inventory.
This is why supermarkets invest heavily in:
demand forecasting;
automatic ordering;
temperature monitoring;
markdown systems;
security;
inventory analytics.
The strange discount sticker placed on tonight’s sandwiches at 7 p.m. is part of this system.
Selling the sandwich cheaply may be more profitable than throwing it away tomorrow.
Fresh food creates a constant race between revenue and spoilage.
10. Distribution Efficiency Can Create Millions in Savings
A customer sees a cereal box sitting on a shelf.
Behind it may be a remarkable logistics operation.
The product traveled through:
manufacturing;
warehousing;
distribution centers;
trucks;
store receiving;
shelf replenishment.
Every unnecessary handling step adds cost.
Large supermarket chains therefore invest enormous amounts in distribution systems because logistics improvements compound across millions of products.
Kroger said its 2025 gross-margin improvement partly reflected sourcing improvements, lower shrink and lower supply-chain costs.
Those sound like boring operational details.
Financially, they are crucial.
If the retailer lowers the cost of moving every carton through its network by only a tiny amount, total savings across billions of units can materially improve supermarket profit margins.
The News Ink’s article on why rising oil prices affect daily life shows the reverse effect: when transportation and fuel become more expensive, supermarkets and suppliers eventually face greater pressure across the same logistics chain.
11. Supermarkets Spread Fixed Costs Across Huge Sales
Consider the cost of the supermarket building.
The store needs:
lighting;
cleaning;
management;
IT systems;
security;
parking;
insurance.
Many of those costs exist whether the store sells $100,000 or $150,000 that day.
The more revenue flowing through the same infrastructure, the smaller those fixed expenses become relative to each dollar of sales.
This creates powerful economies of scale.
The same applies at chain level.
One supermarket needs accounting.
Five hundred stores do not necessarily need 500 completely separate accounting departments.
A large chain can centralize:
procurement;
marketing;
technology;
finance;
data analysis;
distribution.
That spreads corporate costs across enormous revenue.
It is another reason large grocery chains can survive on supermarket profit margins that would be uncomfortable for many small businesses.
12. Checkout Speed Is More Important Than It Looks
Suppose every supermarket transaction takes an extra minute.
Across one shopper, the difference seems meaningless.
Across millions of shoppers, it creates:
longer queues;
more labor hours;
lower checkout capacity;
frustrated customers.
That is why supermarkets continuously experiment with:
self-checkout;
mobile scanning;
automated inventory systems;
electronic shelf labels;
better scheduling.
Efficiency is not glamorous.
But in low-margin retail, seconds become money.
The goal is to process more sales using the same physical infrastructure without reducing the customer experience.
This again illustrates the mathematics behind supermarket profit margins.
Tiny improvements become important because they are repeated at extraordinary scale.
13. Loyalty Programs Are About More Than Discounts
Scan a loyalty card and the supermarket learns something.
A transaction becomes associated with a customer or household.
Over time the retailer can understand:
what categories the household buys;
how often it shops;
which offers produce a response;
whether the customer is becoming less active.
That information can help the retailer personalize promotions.
Instead of offering everyone a discount on coffee, it can offer one to someone likely to purchase coffee—or perhaps someone a competitor is at risk of winning.
Kroger says more than 95% of its customer transactions are connected to a loyalty card and that it serves approximately 63 million households annually.
Albertsons reports more than 51 million loyalty-program members and says customer data helps it personalize deals and optimize product assortment.
For supermarket profit margins, personalization has a simple objective:
spend promotional money where it is more likely to produce additional sales.
Giving everybody the same discount is expensive.
Giving targeted customers relevant offers can be more efficient.
14. Customer Data Has Created a New Business: Retail Media
This is one of the biggest changes in modern supermarket economics.
Imagine a cereal manufacturer wants to advertise.
Traditionally it might buy:
television ads;
billboards;
online banners.
Now it can advertise directly inside a supermarket’s ecosystem.
Sponsored search results in the grocery app.
Ads on the supermarket website.
Promoted products.
In-store screens.
Email campaigns.
Digital coupons.
The supermarket already knows who actually bought cereal after seeing the advertisement.
That makes the advertising space valuable.
Kroger describes its Kroger Precision Marketing operation as a high-margin business capable of connecting advertising exposure directly with household purchases.
The economics are significant.
Kroger reported that its broader alternative profit businesses contributed $1.5 billion of operating profit in 2025. Kroger’s fiscal 2025 results highlight how important activities beyond basic grocery markup have become.
This fundamentally changes the meaning of supermarket profit margins.
A shopper entering the store does not create value only by purchasing groceries.
The shopper also creates:
traffic;
attention;
transaction data.
Those assets can support additional businesses.
15. Pharmacies, Fuel and Services Bring Additional Revenue
Modern supermarkets increasingly look like ecosystems.
A large grocery store may contain or operate:
a pharmacy;
fuel pumps;
banking or money services;
delivery;
pickup;
prepared meals.
Each can create revenue while strengthening the relationship with customers.
Kroger, for example, operated 2,250 supermarket pharmacies and 1,731 fuel centers as of January 2026.
These activities also create cross-shopping.
A customer arrives to collect medicine.
They buy groceries.
Someone buys fuel.
Fuel rewards encourage another supermarket visit.
The supermarket therefore tries to capture more of the household’s regular spending.
This is another way retailers strengthen supermarket profit margins without dramatically increasing the price of basic food.
16. Supermarkets Can Generate Cash Very Quickly
Retail also has an interesting cash-flow characteristic.
The shopper usually pays immediately.
You place groceries on the checkout belt.
You pay.
The supermarket receives cash or a card payment.
Suppliers, meanwhile, may be paid according to agreed commercial terms later.
The exact timing varies widely.
But fast-selling inventory combined with supplier payment periods can make working-capital economics powerful.
Costco describes an extreme version of this in its annual report: rapid inventory turnover sometimes allows it to sell inventory before supplier payments are due while still benefiting from early-payment discounts.
That is one reason inventory turnover matters beyond simple shelf space.
The faster products sell, the less capital remains trapped in unsold merchandise.
The principle resembles another financial system The News Ink explored in what happens to your bank deposit: timing and movement of cash can be as important as the nominal amount appearing on a balance sheet.
17. High Revenue Can Produce Huge Profit Even at 2%
This is the part that often feels counterintuitive.
People see a company earning hundreds of millions or billions and assume its margins must be enormous.
Not necessarily.
FMI reports average U.S. food-retail net profit of only 2.1% for 2025.
A few percent of a very large number remains a very large number.
This is why absolute profit and profit margin must not be confused.
Imagine two businesses:
one generates enormous margins on very few sales;
another earns tiny margins across enormous sales.
Both can be profitable.
Supermarkets largely belong to the second category.
The News Ink’s broader Economy guide explains why percentages and absolute economic amounts often tell very different stories.
Supermarket profit margins look tiny.
Supermarket revenue does not.
18. Why Grocery Stores Cannot Simply Raise Prices for Bigger Margins
If margins are so narrow, why not increase every price by 10% and become much more profitable?
Competition.
Food prices are highly visible.
Consumers remember the approximate price of staple products.
They compare stores.
Discount chains advertise aggressively.
Online grocery shopping makes price comparison easier.
If one supermarket becomes noticeably expensive, shoppers can move their weekly basket elsewhere.
That can be devastating because the supermarket does not lose only the extra margin on milk.
It can lose the entire household’s grocery spending.
Retailers therefore often prefer:
high volume;
customer loyalty;
competitive pricing
over maximizing markup on individual items.
That is one reason supermarket profit margins remain thin.
Competition keeps pressure on prices.
Why Supermarket Revenue Is Not the Same as Supermarket Profit
Imagine a supermarket reports $100 million in revenue.
Some people intuitively think:
“That company made $100 million.”
No.
Revenue is the money collected from customers before expenses.
First comes the cost of the merchandise.
Then:
wages;
distribution;
buildings;
electricity;
technology;
waste;
marketing;
interest;
taxes.
Only what remains becomes profit.
This is why a grocery chain can report billions in sales while operating on a narrow final margin.
Albertsons illustrates the distinction vividly.
For fiscal 2025, it reported approximately $83.2 billion in net sales and other revenue and $22.6 billion in gross margin, but selling and administrative expenses alone reached about $21.9 billion. Albertsons’ annual filing
The gap between gross profit and final profit is where the cost of running thousands of stores lives.
Why Supermarkets Care So Much About Where Products Sit
Why is one cereal at eye level?
Why are chocolates near checkout?
Why do supermarkets place milk deep inside the store?
Not every popular claim about supermarket psychology is universally true, but shelf placement unquestionably matters.
A product nobody notices is difficult to sell.
Retailers therefore analyze:
shelf position;
category layout;
customer movement;
product adjacency;
promotions.
Suppliers care about visibility too.
That is partly why merchandising arrangements and promotional allowances exist.
The goal is to improve sales per unit of scarce shelf space.
Every supermarket aisle is effectively commercial real estate.
A product occupies space.
It needs to justify that space through:
sales;
margin;
customer attraction;
or strategic value.
Why Prepared Food Has Become So Important
Modern supermarkets increasingly compete with restaurants.
Rotisserie chicken.
Sushi.
Pizza.
Sandwiches.
Salad bars.
Bakery products.
Ready meals.
These categories solve a consumer problem:
“I need dinner, but I do not want to cook.”
That can increase the amount a household spends in one visit while helping the supermarket compete for money that otherwise might go to restaurants or delivery apps.
The News Ink’s analysis of why restaurant food tastes better explains how convenience, preparation and sensory quality affect consumers’ willingness to pay for prepared food.
Supermarkets increasingly participate in the same battle for meal spending.
The Real Enemy of Supermarket Profit Is Waste
When margins are tiny, inefficiency becomes dangerous.
Suppose a retailer saves 1% through:
better inventory forecasting;
lower theft;
less food waste;
better transport;
energy efficiency.
In another industry, 1% might appear insignificant.
Against supermarket profit margins of only a few percent, it can be transformative.
This explains why grocery businesses obsess over operational details.
How many strawberries were discarded?
How long did a delivery truck wait?
How much electricity did refrigeration consume?
How many employee hours were scheduled against actual demand?
What percentage of shoppers used cards carrying transaction fees?
FMI reported in its 2026 benchmarking work that credit and debit cards represented 81% of food-retail sales in 2025, making swipe fees another meaningful operating cost.
A supermarket is a giant machine built from tiny numbers.
Frequently Asked Questions
What are typical supermarket profit margins?
Supermarket profit margins are generally low compared with many other businesses. FMI reports average U.S. food-retailer net profit of about 2.1% in 2025, although margins vary by company, year and business model.
How do supermarkets make money with such small margins?
They compensate through enormous sales volume, repeat purchases, rapid inventory turnover, purchasing scale, private brands, supplier arrangements, efficient logistics and additional businesses such as pharmacies, retail media and fuel.
Do supermarkets make only 2% on every product?
No. A 2% net profit margin is a company-level result after expenses. Individual products can have very different gross margins.
What is the difference between gross margin and net profit?
Gross margin reflects the difference between sales and merchandise-related costs under a company’s accounting definitions. Net profit remains only after operating costs, interest, taxes and other expenses are considered.
Are supermarket private-label products more profitable?
They can offer attractive economics and greater pricing and sourcing control, but margins vary by product. Private labels also help differentiate a supermarket because competitors cannot offer the identical store-owned brand.
What are slotting fees?
Slotting allowances are payments that some suppliers make to retailers in connection with initial shelf or warehouse placement of new products. Their use and size vary widely.
Why do supermarkets discount food close to expiry?
Selling a perishable product cheaply can recover some revenue that would otherwise disappear entirely if the product had to be discarded.
How do loyalty cards help supermarkets make money?
They can increase repeat shopping, make promotions more targeted and create transaction data useful for personalized marketing and retail-media businesses.
What is supermarket retail media?
Retail media allows brands to purchase advertising through a retailer’s websites, apps, search results, stores and other channels. Grocery chains can sometimes connect those ads directly to purchase data.
Why are groceries so expensive if supermarkets have low margins?
Retail prices include far more than retailer profit. Farmers, manufacturers, packaging, transport, energy, wages and commodity costs all contribute before the supermarket’s final net profit is calculated.
Do supermarkets make more money when food prices rise?
Not automatically. Higher prices can increase nominal sales while simultaneously raising merchandise, labor, transport and energy costs. Consumers may also change what they buy, so inflation does not translate directly into greater profit.
The Supermarket Business Model Is a Game of Pennies Played at Enormous Scale
The next time you walk into a supermarket, look at it differently.
Do not see shelves of individual products.
See a system.
A truck delivers thousands of items.
Employees move them onto shelves.
Software predicts what will sell.
Purchasing teams negotiate with suppliers.
Loyalty systems decide which discounts to send customers.
Private labels compete beside famous brands.
Fresh-food teams race against spoilage.
Distribution centers move merchandise continuously.
Checkout systems process thousands of purchases.
Advertising systems sell access to consumer attention.
Then everything begins again the next morning.
That is how supermarket profit margins work.
The supermarket does not need to make $10 from your loaf of bread.
It might need only a small contribution from that bread, another from the coffee, another from the vegetables and another from the detergent.
Then it needs you to return next week.
And the week after.
And it needs thousands of other households to do exactly the same thing.
At chain level, the multiplication becomes enormous.
That is why a business can operate at a net margin around a few percent and still produce substantial profits.
Volume compensates for margin.
Fast turnover compensates for margin.
Scale lowers purchasing costs.
Private labels provide control and differentiation.
Supplier allowances can reduce merchandise costs.
Efficiency keeps operating expenses from consuming the remaining margin.
Loyalty programs increase repeat business.
Retail media turns customer traffic and transaction data into another revenue opportunity.
The modern supermarket is therefore not merely:
buy product → add markup → sell product.
It is a much more sophisticated commercial machine.
And the most remarkable part is how little room for error exists.
When supermarket profit margins are only a few percent, an extra percentage point of waste, labor, energy or transport expense can consume a large portion of profit.
That is why supermarkets care so deeply about tiny improvements.
A few cents saved on one shipment look irrelevant.
A few minutes removed from one process look irrelevant.
One less spoiled product looks irrelevant.
But multiply each improvement across:
millions of items;
millions of customers;
thousands of employees;
hundreds of stores;
52 weeks every year.
Tiny numbers stop being tiny.
That is ultimately the secret behind supermarket economics.
They do not necessarily make a fortune from each thing you buy.
They make money because an extraordinary number of things are being bought all the time.
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