Business and Technology · Social and demographic factors

Demographic Factors and Population Change for ACCA Business and Technology

Updated 11 October 2026 · Fact-checked

Demographic factors are measurable features of a population: size, age structure, birth and death rates, migration and household make-up. They change what people buy and how many workers are available. To answer exam questions, identify the trend, then link it to demand, labour supply and business response.

Understand Demographic Factors and Population Change

Demographics are statistics that describe a population. They sit under the Social part of PESTEL analysis. Businesses study them because they change slowly and are fairly predictable, which makes them useful for planning.

The main features are population size, age structure (how many people are young, working age or retired), birth rate, death rate, migration and household composition (for example, more people living alone or smaller families).

Population change has two sources. Natural change is births minus deaths. Net migration is people arriving minus people leaving. Together they give total population change. Falling birth rates and longer life expectancy produce an ageing population, where the average age rises and the share of older people grows.

The effects fall in two places. On the demand side, different age groups buy different things. Young families buy baby products, schools and housing. Older people spend more on healthcare, leisure, pensions and care services. Smaller households need more, smaller homes and smaller pack sizes.

On the labour supply side, an ageing population means fewer young workers and a higher share of retirees. This can cause skills shortages, higher wages and pressure to hire older staff or use automation. Migration can add workers and skills, but may also raise social and political issues. Governments face higher pension and health costs, which may mean higher taxes.

Key formulas to remember

Natural population change: Natural change = births − deaths; Positive means the population grows from natural causes; negative means it shrinks.
Net migration: Net migration = immigrants − emigrants; Positive means more people are arriving than leaving.
Total population change: Population change = (births − deaths) + (immigrants − emigrants); A country can grow through migration even if births are below deaths.
Dependency ratio: Dependency ratio = (young dependants + older dependants) ÷ working-age population × 100; Age bands vary by country (commonly under 15 and 65 and over, with working age 15 to 64). Use the bands given in the question.

How to solve Demographic Factors and Population Change questions

Use this method for any question on demographic factors, whether it is a definition, a scenario or a calculation.

1Read the scenario and identify which demographic factor is changing: size, age, birth or death rates, migration or households.
2State the direction of the trend, for example an ageing population or a rising number of single-person households.
3Decide whether the question asks about demand, labour supply, costs or government policy.
4Link the trend to a specific effect. For demand, name the age group and what it buys. For labour, name the shortage or surplus.
5Judge whether the effect is an opportunity or a threat for the business in question.
6If numbers are given, apply the formula carefully and use the exact age bands in the question.
7For multiple response, select exactly the stated number and avoid options about factors that are not demographic, such as interest rates.

Quickest way: Trend, group, effect

When to use it: Use this for one- or two-mark objective test questions where you have about a minute.

Spot the trend in the stem (older, smaller households, more migrants).
Ask who is affected: customers or workers.
Pick the option that links that group to the right effect.
Reject options that describe economic, political or technological factors, or that reverse the direction of the trend.

Common mistakes in Demographic Factors and Population Change

Treating demographic factors as the same as all social and cultural factors.
Both sit under the Social heading in PESTEL, so they blur together.
Fix: Demographics are measurable population statistics. Attitudes, values and fashions are cultural factors.
Saying an ageing population always hurts business.
Students focus on labour shortages and pension costs only.
Fix: Give both sides. Healthcare, leisure and care providers gain demand, while employers may lose young recruits.
Confusing a falling birth rate with a falling population.
Population also depends on deaths and migration.
Fix: Use total change = natural change + net migration before deciding the direction.
Ignoring migration as a source of labour supply and demand.
Students think only about births and deaths.
Fix: Always consider migration. It can add workers, skills and new customer groups.
Writing general effects with no link to the business in the question.
Students recall notes instead of reading the scenario.
Fix: Name the business's products or workforce and tie each effect to them.
Mixing up the dependency ratio by dividing by total population.
The denominator is easy to misread.
Fix: Divide dependants by the working-age population only.

Worked examples

Example 1

A country has 4,00,000 births, 3,50,000 deaths, 1,20,000 immigrants and 80,000 emigrants in a year. Calculate the total population change.

Show the solution

Natural change = 4,00,000 − 3,50,000 = 50,000.
Net migration = 1,20,000 − 80,000 = 40,000.
Total change = 50,000 + 40,000 = 90,000.

Answer: The population increases by 90,000.

Example 2

A retailer sells mainly to under-30s in a country where the birth rate is falling, life expectancy is rising and household size is shrinking. Explain two likely effects on the retailer.

Show the solution

Trend: the population is ageing, so the share of under-30s is falling.
Demand effect: the retailer's core market is shrinking in relative terms. It may need to adapt its range for older customers or seek younger markets abroad.
Household effect: smaller households favour smaller pack sizes, smaller furniture and convenience products, which the retailer could add.
Labour effect: fewer young entrants may make recruiting store staff harder and raise wages, so the retailer might consider hiring older workers.

Answer: The retailer faces a relatively smaller young customer base and tighter young labour supply, but can gain from smaller-household products and from serving older customers.

Exam tips

Always state the direction of the trend before the effect. Marks go to the link, not the label.
In scenario questions, name the age group and the product or job role affected.
Check whether a question asks about demand or labour supply. They need different answers.
For calculations, use the age bands in the question and show each step, even in number entry questions where only the final figure is entered.
Remember demographics belong in the Social part of PESTEL.

Practice questions from Social and demographic factors

Demographic Factors and Population Change: frequently asked questions

What are the main demographic factors in ACCA BT?

They are population size, age structure, birth and death rates, migration and household composition. You must link each to demand and the labour market.

How does an ageing population affect business?

Demand rises for healthcare, leisure and care services, while the supply of young workers falls. Employers may face skills shortages and higher wage costs. Governments may face higher pension and health spending.

How does migration affect labour supply?

Inward migration can increase the number of workers and bring new skills, easing shortages. Outward migration can reduce the workforce. It also changes the mix of customers.

Are demographic factors the same as social factors?

No. Demographics are measurable population statistics. Social factors also include attitudes, values and lifestyles. Both fall under the Social heading of PESTEL.