Business and Technology · The formal and informal business organisation

Formal and Informal Organisation in ACCA BT

Updated 11 October 2026 · Fact-checked

The formal organisation is the official structure: defined roles, authority, rules and reporting lines set by management. The informal organisation is the unofficial network of friendships, groups and communication that staff create themselves. To answer exam questions, define both, contrast them, then give the advantages and disadvantages of each in context.

Understand Formal and Informal Organisation

Every organisation has two structures running side by side. You can see one on paper. You can only see the other by watching how people behave.

The formal organisation is the deliberate structure designed by management. It has organisation charts, job descriptions, policies, procedures, reporting lines and levels of authority. Its purpose is to coordinate work and achieve the organisation's objectives. Authority comes from the position a person holds.

The informal organisation grows up without being planned. It comes from friendships, shared interests, common backgrounds, working next to each other or going to lunch together. People form groups, share gossip and information (often called the grapevine), and ask each other for help outside official channels. Influence comes from personal standing and respect, not from job title.

The two are linked. Informal groups exist inside the formal structure and can support it or work against it. A good manager does not try to abolish the informal organisation, because that is not realistic. Instead, the manager understands it and uses it. For example, an informal leader who is respected by the team can help to introduce a change smoothly.

For BT, you need to be able to define each type, state the differences, and judge the advantages and disadvantages. Questions are usually short and objective, so precise wording matters.

Key formulas to remember

Formal organisation: Formal = planned + official + position-based authority + written rules; Created by management to meet organisational objectives. Shown on the organisation chart.
Informal organisation: Informal = unplanned + unofficial + personal influence + social relationships; Created by staff. Not shown on the organisation chart. Includes the grapevine.
Source of authority: Formal: authority from position. Informal: influence from personal standing.; A frequent test point. An informal leader may have no official title.
Communication channels: Formal: official channels (memos, reports, meetings). Informal: grapevine, conversations.; Informal communication is usually faster but less reliable.

How to solve Formal and Informal Organisation questions

Use this method for any question on formal and informal organisation, whether it is a multiple choice item or a short scenario.

1Read the question and decide what is being asked: a definition, a difference, an advantage or disadvantage, or a scenario to classify.
2Identify the key signals in the wording. Words such as official, planned, job description, chart or policy point to the formal organisation. Words such as friendship, gossip, grapevine, unwritten or social point to the informal one.
3Ask where the authority or influence comes from. Position means formal. Personal respect or relationships means informal.
4Check whether the behaviour is planned by management or arose naturally among staff.
5For advantage and disadvantage questions, think about the effect on communication, morale, speed, control and change.
6In a scenario, decide whether the informal group is helping or harming the organisation's objectives.
7Eliminate options that overstate a point, such as saying informal organisation is always harmful.
8Choose the answer that fits the scenario most precisely.

Quickest way: Plan or people test

When to use it: Use this when you have about a minute for an objective test question and need to classify a feature or choose a statement.

Ask: was it planned by management and written down? If yes, it is formal.
Ask: did it grow naturally from relationships between staff? If yes, it is informal.
For advantages and disadvantages, remember the pairs: formal gives control and clarity but can be rigid; informal gives speed and morale but can spread rumours and resist change.
Reject any option using absolute words like always or never.

Common mistakes in Formal and Informal Organisation

Saying the informal organisation is always bad for the business.
Students link informal with unofficial and assume it is disruptive.
Fix: Remember it can help: it speeds up communication, builds morale and fills gaps in the formal structure. It can also harm. Give both sides.
Saying the informal organisation can be abolished by management.
Students think management controls everything in the business.
Fix: Informal groups form naturally wherever people work together. Management can only understand and influence them.
Confusing informal organisation with informal communication only.
The grapevine is the best-known example, so it becomes the whole definition.
Fix: Informal organisation also covers groups, friendships, norms and informal leaders, not just gossip.
Assuming an informal leader must be a manager.
Students link leadership with job title.
Fix: Informal leaders gain influence from personality, skill or respect. They may hold no formal rank.
Treating the organisation chart as the full picture of how work gets done.
The chart is easy to see and learn.
Fix: The chart shows only the formal structure. Real decisions and information often flow through informal networks as well.

Worked examples

Example 1

A junior accountant at a company often asks a friendly senior colleague in another department for advice, instead of going through the official reporting line. The senior colleague has no authority over the junior accountant. Which type of organisation does this relationship illustrate, and give one advantage and one disadvantage.

Show the solution

Identify the signal: the relationship is based on friendship, not job position.
The senior colleague has no official authority over the junior accountant, so the influence is personal.
The advice is outside official reporting lines, so this is the informal organisation.
Advantage: the junior gets quick help and learns faster, and cross-department cooperation improves.
Disadvantage: the advice may be wrong or inconsistent with company policy, and the junior's own manager may be bypassed.

Answer: This is the informal organisation. An advantage is faster help and better cooperation; a disadvantage is the risk of inaccurate advice that bypasses proper authority.

Example 2

Which ONE of the following is a feature of the formal organisation? (A) Gossip passing between staff at lunch (B) A job description setting out a role's duties and reporting line (C) A friendship group that plays sport after work (D) An employee whom colleagues trust and follow despite having no rank

Show the solution

Test each option with the plan or people test.
Option A is the grapevine, which is unplanned and social, so informal.
Option C is a social group formed by choice, so informal.
Option D is an informal leader with personal influence, so informal.
Option B is written down, planned by management and sets position-based duties and reporting lines, so formal.

Answer: B. A job description is part of the formal organisation.

Exam tips

Read the first signal word in the scenario: official, written or position means formal; friendship, gossip or unwritten means informal.
Avoid absolute statements. Options that say informal groups are always harmful or can be eliminated are usually wrong.
In multiple response questions, select the stated number only. Check each option against the plan or people test separately.
Be ready to give both advantages and disadvantages of each type, since questions often ask for one of each.
Link this topic to communication and culture. Informal networks and the grapevine often appear in related questions.

Practice questions from The formal and informal business organisation

Formal and Informal Organisation in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

CMA FoundationFormal and Informal Communication

Formal and Informal Organisation: frequently asked questions

What is the main difference between formal and informal organisation?

The formal organisation is planned by management, with defined roles, rules and authority from position. The informal organisation arises naturally from relationships between staff, with influence based on personal standing. One appears on the organisation chart and the other does not.

What are the advantages of informal organisation?

It can speed up communication, improve morale and give staff a sense of belonging. It can also fill gaps in the formal structure and help staff cooperate across departments. Managers can use it to support change.

What are the disadvantages of informal organisation?

It can spread rumours and inaccurate information. Informal groups may resist change or set norms that conflict with organisational goals. It can also undermine formal authority if staff follow informal leaders instead.

Can management control the informal organisation?

Not fully. Informal groups form naturally wherever people work together. Management can understand them, communicate openly to reduce rumours and work with informal leaders to gain support.