Should a Business Put Its Prices Up?

Why a 10% Cost Increase Does Not Automatically Mean a 10% Price Rise

If your costs rise by 10%, why not simply increase your prices by 10%?

At first glance, that sounds sensible. Ingredients become more expensive, electricity bills increase and suppliers charge more. Surely customers must pay a little extra?

But customers have decisions to make too.

They might buy less, choose a cheaper alternative, visit a competitor or decide they can manage without the product altogether.

A higher price means more money from each sale. It does not necessarily mean more revenue overall — and revenue is not the same as profit.

For GCSE and A level Business students, this everyday decision brings together pricing strategies, costs, competition, customer loyalty and price elasticity of demand. It also demonstrates something essential about studying business:

A strong answer explains what could happen, why it could happen and what the outcome depends on.

Let us start with a café.

1. The Café Owner’s Dilemma

Imagine an independent café selling takeaway coffee for £3 a cup.

Its variable cost is £1.50 per cup. This covers items that vary directly with sales, such as coffee, milk, cups and lids.

The café sells 1,000 cups a week.

For this simplified example, weekly fixed costs are £1,000. These represent costs that do not change with the number of cups sold within the range we are considering.

The figures are:

Revenue = selling price x quantity sold

Revenue = £3 x 1,000 = £3,000

Total variable costs = £1.50 x 1,000 = £1,500

Profit = revenue - total variable costs - fixed costs

Profit = £3,000 - £1,500 - £1,000 = £500

Now suppose the variable cost per cup rises by 10%, from £1.50 to £1.65.

If the café keeps its £3 price and sells the same number of cups:

Profit = £3,000 - £1,650 - £1,000 = £350

A 10% increase in variable cost per cup has caused a 30% fall in profit.

That is an important lesson. A relatively modest cost increase can have a substantial effect on a business with a limited profit margin.

But does the café need to increase its selling price by 10%?

Not automatically.

The extra cost is 15p per cup. If sales and fixed costs remain unchanged, increasing the price from £3 to £3.15 would preserve the original £500 weekly profit.

That is a 5% price rise.

The percentage increase in costs and the percentage increase in selling price apply to different starting amounts. They should not simply be treated as interchangeable.

2. What Happens If the Café Charges £3.30?

Suppose the owner decides to raise the price by 10%, from £3 to £3.30.

Some customers may barely notice. Others may reconsider their daily coffee.

Here are several possible outcomes. All figures are hypothetical.

Scenario	Price per cup	Weekly cups sold	Revenue	Variable cost per cup	Weekly profit
Before the cost increase	£3.00	1,000	£3,000	£1.50	£500
Higher costs; price unchanged	£3.00	1,000	£3,000	£1.65	£350
Higher costs; price rises; sales fall 5%	£3.30	950	£3,135	£1.65	£567.50
Higher costs; price rises; sales fall 15%	£3.30	850	£2,805	£1.65	£402.50

Fixed costs remain £1,000 in every scenario.

With a 5% fall in sales, the price rise produces a profit of £567.50 — more than the original £500.

With a 15% fall in sales, profit reaches only £402.50.

However, notice something interesting.

In that final scenario, revenue falls below its original level, but profit is still higher than the £350 earned by holding the price unchanged after costs increase.

The café sells fewer cups, so it also incurs fewer variable costs.

This is why managers must compare realistic alternatives carefully. “Revenue has fallen” does not, by itself, prove that the pricing decision was wrong.

Equally, the best option in this simplified weekly calculation might have longer-term disadvantages. Losing regular customers could also reduce future sales of cakes, sandwiches and other drinks.

3. Contribution: What Each Sale Leaves Behind

Contribution helps explain these results.

Contribution per unit = selling price - variable cost per unit

Contribution is the amount each sale provides towards fixed costs and, once those are covered, profit.

After the cost increase, at a £3 selling price:

Contribution per cup = £3 - £1.65 = £1.35

At a £3.30 selling price:

Contribution per cup = £3.30 - £1.65 = £1.65

The higher price increases contribution per cup by 30p.

The business can therefore sell fewer cups and still generate the same total contribution.

To restore its original £500 weekly profit, the café needs £1,500 of total contribution: £1,000 to cover fixed costs and £500 for profit.

Required sales = (fixed costs + target profit) / contribution per unit

Required sales = (£1,000 + £500) / £1.65

Required sales = approximately 909.1 cups

As it cannot sell a fraction of a cup in this example, it needs at least 910 cups a week.

That gives the owner a useful question:

Is a fall from 1,000 cups to fewer than 910 cups likely?

A calculation becomes valuable when it helps management identify what it needs to investigate.

4. Price Elasticity: How Strongly Will Customers React?

At A level, we can explore customer response using price elasticity of demand, usually shortened to PED.

PED = % change in quantity demanded / % change in price

Suppose the café raises its price by 10% and quantity demanded falls by 5%.

Using the original values as the bases for these percentage changes:

PED = -5% / 10% = -0.5

The negative sign shows that quantity demanded falls as price rises.

When classifying demand, we normally consider the size of the number without its minus sign:

• Less than 1: demand is price inelastic. Quantity demanded changes proportionately less than price.

• Greater than 1: demand is price elastic. Quantity demanded changes proportionately more than price.

• Equal to 1: demand is unit elastic. The proportional changes are equal.

If sales fall by 15% after the same 10% price increase:

PED = -15% / 10% = -1.5

Demand is price elastic over that change.

The usual revenue relationship is that a price rise increases revenue when demand is inelastic and reduces revenue when demand is elastic. This assumes other influences on demand remain unchanged.

For sizeable changes, percentage calculations using original values and those using midpoint values can differ. Students should follow the method specified in the question and check the actual revenue figures where they are available.

PED helps explain revenue. It does not calculate profit for us.

Our café example shows precisely why that distinction matters.

5. What If Competitors Keep Their Prices Down?

Imagine two similar cafés on the same street.

One raises its coffee price to £3.30. The other continues charging £3.

Customers now face a clearer price difference. Those who consider the coffees equally good may switch.

However, the businesses may not be equally attractive to customers.

One café might offer:

• Faster service for commuters.

• Better coffee or more consistent quality.

• Comfortable seating and a welcoming atmosphere.

• A convenient location.

• Staff who know regular customers’ preferences.

These differences can reduce customers’ willingness to switch.

This is where differentiation becomes relevant. A business offering something customers value has more scope to justify its price.

Even then, competitors may respond. They could introduce a loyalty offer, improve their service or advertise their lower prices.

The café’s decision therefore depends partly on what other businesses do next.

6. Loyal Customers Still Have Budgets

Customer loyalty can make demand less price sensitive, but loyalty has limits.

A customer who enjoys visiting the café may accept an occasional increase. Repeated increases could eventually make the visit unaffordable.

Different customers may also respond differently.

A customer buying one coffee a week faces a small additional expense. Someone buying a coffee every working day experiences a larger cumulative increase.

This is a useful reminder for Business students:

A market is made up of customers with different incomes, priorities and alternatives.

Statements such as “customers are loyal, so sales will not fall” are too confident. A better argument explains why loyalty might reduce the fall in sales, while recognising that affordability still matters.

7. Does Being a Necessity Make a Price Rise Safe?

Products regarded as necessities often have relatively inelastic demand, particularly when there are few substitutes.

However, we must distinguish between demand for a product category and demand from an individual supplier.

People need food. They do not necessarily need to buy it from one particular shop.

Someone may need transport to work but still have choices about routes, providers or how often they travel.

Similarly, a customer might regard coffee as part of their morning routine but decide to make it at home.

Time matters too. Customers may initially accept a higher price because changing habits takes effort. Over several months, they may find alternatives.

A product’s importance does not remove competition.

8. The Same Decision Looks Different in Other Businesses

A private tutor: limited hours and the importance of continuity

A tutor has a limited number of teaching hours available.

If all suitable lesson slots are filled and enquiries continue to arrive, a price increase might raise revenue without reducing the number of lessons taught.

If there are many unfilled slots, the same increase may make attracting students harder.

Families also consider subject expertise, teaching quality, preparation, resources and the relationship between tutor and student. Changing tutor during an examination course can carry a cost in lost continuity.

From a teaching perspective, I find this a particularly useful example because students can see both sides of the decision: the business needs to remain sustainable, while families need to manage their budgets.

A sensible evaluation considers both.

A clothing retailer: stock that must sell

A clothing retailer may earn more contribution per item after a price rise but sell fewer items.

That becomes a particular problem when stock is seasonal. Unsold coats, summer clothes or fashion items may later require substantial discounts.

Managers need to consider stock turnover, cash tied up in inventory and likely markdowns alongside the initial margin.

A streaming service: small changes across many subscribers

A subscription service may gain substantial additional monthly revenue from a small price increase across a large customer base.

But customers can cancel, rotate between services or choose a cheaper package.

Managers must consider cancellations, new subscriptions and customer retention over time. The first month’s extra revenue may not reveal the full effect.

9. Raising Every Price Is Only One Option

Businesses can respond to rising costs in several ways.

Approach	Possible benefit	Possible drawback
Increase selected prices	Protects margins where customers are less price sensitive	Requires good knowledge of products and customers
Offer basic and premium options	Gives customers choices at different prices	Adds operational complexity
Improve efficiency	Reduces costs without increasing prices	Savings may be limited or require investment
Use bundles or loyalty offers	May encourage repeat purchases or larger transactions	Discounts can reduce contribution
Absorb some extra costs	May protect customer relationships	Reduces profit and may be unsustainable

These approaches connect with different pricing strategies.

Cost-plus pricing starts with costs and adds a mark-up. It is straightforward but does not guarantee customers will accept the resulting price.

Competitive pricing considers rivals’ prices. However, copying competitors can be dangerous if their costs or objectives differ.

Value-based pricing considers what customers believe the product or service is worth. That requires a convincing offer and a good understanding of the customer.

The appropriate approach depends on the business’s circumstances and objectives.

10. Why PED Does Not Make the Decision for Management

Even a reliable PED estimate leaves several questions unanswered.

What is happening to costs?
A forecast of revenue is insufficient without the associated variable and fixed costs.

What is the objective?
The business might prioritise immediate profit, market share, customer retention or survival.

Will the estimate remain reliable?
Customer behaviour may change with incomes, seasons, competitors and the size of the increase.

What happens over time?
Customers may accept the new price initially and switch later.

How will the decision affect other sales?
Losing a coffee customer might also mean losing a sandwich purchase.

Managers should also be cautious about attributing every sales change to price. If the café raises prices in a week of heavy rain, roadworks or a competitor’s promotion, the change in sales cannot confidently be explained by price alone.

PED is useful evidence. Its value depends on how well it was estimated and how carefully it is interpreted.

11. Turning This Into a Strong Examination Answer

A basic answer might say:

“The business should raise its prices because costs have increased.”

That identifies an issue but does little analysis.

A stronger chain of reasoning would be:

“Raising prices would increase contribution per unit, provided variable cost per unit remained unchanged during the price change. However, quantity demanded might fall as customers switch to competitors. If demand were relatively inelastic, total revenue would be likely to increase. The effect on profit would then depend on total contribution and any changes in fixed costs.”

Evaluation develops the argument further:

“For a café with loyal customers, a convenient location and few close substitutes, a modest increase may protect profit. However, if nearby competitors maintain lower prices and customers see little difference in quality, the loss of sales could outweigh the higher contribution per cup. The owner should compare likely sales outcomes before deciding the size and timing of an increase.”

Notice the progression:

Price rise -> customer response -> quantity sold -> revenue -> contribution and profit -> justified judgement

This is the kind of thinking I want students to develop at Hemel Private Tuition. Knowing a definition is a starting point. Using it to explain a real decision is where understanding becomes much stronger.

Conclusion: The Best Price Needs a Reason

Should a business put its prices up?

Sometimes, yes. Holding prices unchanged while costs rise can steadily undermine a business’s ability to survive and invest.

But increasing prices is not a mechanical exercise in matching percentages.

The decision depends on customers’ alternatives, the value they perceive, competitors’ reactions, contribution per sale and the business’s longer-term objectives.

Before increasing a price, ask:

How many sales could we lose before the decision stops helping us — and what evidence do we have about whether that will happen?

That question connects the calculation to the judgement.

At Hemel Private Tuition, I help GCSE and A level Business students make those connections through practical examples, clear calculations and carefully developed examination answers.

If your son or daughter can remember the terminology but finds it harder to explain, analyse and evaluate, get in touch to discuss online or in-person Business Studies tuition in Hemel Hempstead.