Strategic Business Leader · Competitive forces

Buyer and Supplier Bargaining Power in ACCA Strategic Business Leader

Updated 11 October 2026 · Fact-checked

Bargaining power is the ability of customers (buyers) or suppliers to push the firm on price, quality and terms. Power is high when they are few, large, or hard to replace. To answer, list the factors, apply each to the case facts, judge the overall strength, then recommend ways to reduce the power.

Understand Buyer and Supplier Bargaining Power

Porter's Five Forces model includes two forces that sit on either side of your business. Buyer power is the strength of customers to force prices down or demand higher quality and service. Supplier power is the strength of suppliers to raise prices or cut quality and service. Both squeeze industry profit.

Think of it as a tug of war over the margin. If buyers have power, they take profit through lower prices. If suppliers have power, they take profit through higher input costs. The firm is stuck in the middle.

Power comes from the balance of dependence. Whoever has more alternatives, and whoever can walk away more cheaply, holds the power. So the factors below are all different ways of asking: who needs whom more?

Buyer power is typically high when there are few buyers or they buy in large volumes, products are standard and undifferentiated, switching costs are low, buyers are price sensitive, buyers can credibly integrate backwards and make the product themselves, or buyers have full information on prices. Supplier power is typically high when there are few suppliers, the input is unique or differentiated, switching costs for the firm are high, there is no good substitute input, the supplier could integrate forwards into your market, or your firm is a small customer for them.

In SBL, the examiner does not want a list of Porter's factors. You are expected to apply them to the scenario, say which matter most, and advise what the board should do. Power can also be reduced, which is where the strategy marks lie.

Key rules to remember

Buyer power: high when: Few or large buyers + standard product + low switching costs + price sensitivity + threat of backward integration + good price information; Not every factor must be present. Judge the net effect from the case facts.
Supplier power: high when: Few suppliers + unique or differentiated input + high switching costs + no substitute input + threat of forward integration + firm is a minor customer; Also consider whether the input is a large share of your total costs.
Power test: Power = relative dependence (who has more alternatives and lower cost of walking away); A useful single question to frame any answer.
Ways to reduce buyer power: Differentiate + raise switching costs + widen the customer base + loyalty schemes + forward integration; Each should be tied to the firm's situation.
Ways to reduce supplier power: Multiple sourcing + develop alternatives + backward integration + partnership or long-term contracts + pool purchasing; Check feasibility and cost before recommending integration.

How to solve Buyer and Supplier Bargaining Power questions

Use this method for any question on buyer or supplier power. It keeps you applied to the scenario and covers the professional skills marks.

1Read the requirement. Decide whether it asks about buyers, suppliers or both, and whether it asks you to assess, advise or both.
2Identify who the buyers and suppliers actually are in the case. Name them specifically, not generically.
3Go through the power factors and pick those with evidence in the case. Quote or paraphrase the facts.
4Make a judgement. Say whether power is high, moderate or low, and why the strongest factors dominate.
5Explain the impact on the firm: margin, price, quality, risk of supply disruption or lost customers.
6Recommend ways to reduce the power. Choose options that fit the firm and give a reason for each.
7Note limits or risks, such as cost of integration, loss of flexibility or regulatory issues.
8Close with a short conclusion or recommendation addressed to the reader named in the requirement.

Quickest way: Factor, fact, so-what

When to use it: Use it when time is short, for example a 10 to 12 mark requirement in a case task.

Write two or three factors only: the ones the case clearly supports.
For each factor, give one case fact as evidence.
Add the so-what: the effect on price, cost, margin or risk.
Give a verdict in one line: high or low power.
Add two reduction strategies, each with one reason it suits this firm.

Common mistakes in Buyer and Supplier Bargaining Power

Listing Porter's factors without applying them to the case
Students memorise the textbook list and write it out to feel safe.
Fix: Use each factor only with a case fact next to it. If there is no fact, leave the factor out.
Confusing buyer and supplier power
Both forces use the same factors in mirror image, so it is easy to flip them.
Fix: Label who is who first. Buyers pay you. Suppliers sell to you. Then apply the factors.
Assuming big buyers always have power
Size seems like power. But if the buyer has high switching costs or depends on your product, power is lower.
Fix: Always ask who depends on whom. Power depends on alternatives, not only size.
Only assessing power and not saying how to reduce it
Students stop at analysis because the model feels like a descriptive tool.
Fix: If the requirement says advise or recommend, include strategies. Even when it does not, one line on the response shows commercial awareness.
Recommending integration without considering cost or risk
Backward or forward integration is the textbook answer, so it is written automatically.
Fix: State the cost, skills needed and risk. Compare with simpler options such as multiple sourcing or contracts.
Ignoring end consumers or the wider chain
Students focus only on the direct customer, such as a retailer.
Fix: Consider whether the direct buyer is a distributor and whether the final consumer matters to the firm's power.

Worked examples

Example 1

A UK-based furniture maker sells 70% of its output to two national retail chains. Its products are similar to those of five rivals. Retailers can switch supplier at little cost and regularly demand discounts. Assess the bargaining power of buyers and suggest two ways to reduce it.

Show the solution

Identify the buyers: the two national retail chains.
Factor 1: concentration. Two buyers take 70% of output, so each is very important to the firm and could hurt it by leaving.
Factor 2: low switching costs and similar products from five rivals. Retailers can easily move orders elsewhere.
Factor 3: evidence of power in use. Regular discount demands show the power is being exercised.
Verdict: buyer power is high. This reduces the firm's margin and makes its sales volume uncertain.
Reduction strategy 1: differentiate. Develop a branded or design-led range so retailers cannot easily substitute it. Reason: it reduces the product similarity that weakens the firm.
Reduction strategy 2: widen the customer base. Sell to smaller retailers or online direct to consumers. Reason: it cuts reliance on two buyers, though it needs extra marketing and distribution cost.

Answer: Buyer power is high because of customer concentration, low switching costs and undifferentiated products, and it is already pushing prices down. The firm should differentiate its range and broaden its customer base, while accepting the extra cost and effort.

Example 2

A mobile phone assembler depends on a single supplier for a specialist camera sensor that makes up 25% of its component costs. The supplier has recently raised prices twice. Alternative sensors would require a six-month redesign. Evaluate supplier power and recommend two responses.

Show the solution

Identify the supplier: the single sensor producer.
Factor 1: sole source. There is only one supplier, so the assembler has no ready alternative.
Factor 2: high switching costs. A six-month redesign makes changing supplier slow and expensive.
Factor 3: importance of the input. It is 25% of component costs, so price rises have a large effect on margin.
Evidence of use: two price rises show the supplier is using its position.
Verdict: supplier power is high.
Response 1: develop a second source. Start the redesign now for a compatible alternative sensor. Reason: it cuts dependence over time and gives negotiating leverage, but costs engineering time.
Response 2: negotiate a long-term supply contract with price caps. Reason: it gives short-term protection while the redesign takes place. The supplier may ask for volume commitments, which limits flexibility.

Answer: Supplier power is high because of a sole source, high switching costs and a significant cost share. The assembler should start qualifying an alternative sensor and secure a long-term price-capped contract in the meantime.

Exam tips

Name the actual buyers and suppliers from the case. Generic answers score low on application.
Pick the two or three strongest factors and develop them. Depth with evidence beats a long list.
Always give a verdict on whether power is high or low. Examiners reward judgement.
When advising on reduction, comment on cost, feasibility or risk. This earns professional skills marks for analysis and commercial acumen.
Link the power to the wider strategy. If the firm competes on cost, explain how supplier power threatens that position.

Practice questions from Competitive forces

Buyer and Supplier Bargaining Power: frequently asked questions

What is the difference between buyer power and supplier power?

Buyer power is the ability of customers to push down prices or demand more for their money. Supplier power is the ability of suppliers to raise prices or reduce quality of inputs. The factors are mirror images, but the direction of the squeeze on profit is different.

What factors affect supplier power in Porter's model?

Supplier power is higher when there are few suppliers, the input is unique, switching costs are high, no substitute input exists, or the supplier may integrate forwards. It is also higher when the firm is a small customer of the supplier.

How can a firm reduce buyer power?

It can differentiate its products, raise switching costs, widen its customer base, build loyalty or integrate forward. The best choice depends on cost and feasibility in the scenario.

How can a firm reduce supplier power?

It can use multiple suppliers, develop alternative inputs, integrate backwards, pool purchasing or build long-term partnerships. You should weigh the cost and risk of each option in your answer.

Do I need to draw the Five Forces diagram in SBL?

No. SBL rewards applied written analysis, not diagrams. Use the model as a structure and spend your time on case evidence and recommendations.