Business and Technology · Business organisational structure

Formal and Informal Organisations: Differences and Effects on Performance

Updated 11 October 2026 · Fact-checked

A formal organisation is the official structure: defined roles, reporting lines, rules and procedures set by management. An informal organisation is the unofficial network of relationships and groups that forms naturally between people. To answer exam questions, define both, contrast them, then explain how each affects behaviour and performance.

Understand Formal and Informal Organisations

Every organisation has two structures at once. One is designed. The other grows by itself.

The formal organisation is the structure management creates on purpose. It shows who reports to whom, who has authority over what, and which rules and procedures apply. You see it in organisation charts, job descriptions, policies and official communication channels. Its aim is to achieve organisational objectives in an orderly, accountable way.

The informal organisation is the web of personal relationships, friendships, social groups and unofficial communication that develops among people at work. Nobody designs it. It forms because people share interests, work close together, or need support that the formal structure does not give. Its communication is often called the grapevine.

The two interact. Informal groups can support the formal structure by speeding up communication, sharing know-how and raising morale. They can also work against it by spreading rumours, resisting change or setting output norms below what management wants. Your exam answers should show both sides.

The key contrast is where the authority and rules come from. In a formal organisation they come from the organisation's position and rules. In an informal one, influence comes from personal standing, trust and group norms, not job titles.

Key formulas to remember

Formal organisation features: Formal = defined roles + official authority + written rules + official channels; Created by management, deliberate, stable and documented.
Informal organisation features: Informal = personal relationships + group norms + unofficial channels; Arises spontaneously, not shown on an organisation chart, based on personal influence.
Advantages of formal structure: Clarity + accountability + control + consistency; Weakness: can be rigid, slow and bureaucratic.
Advantages of informal organisation: Speed + support + morale + flexibility; Weakness: rumours, resistance to change, goals that conflict with management.

How to solve Formal and Informal Organisations questions

Use this method for any question on formal and informal organisations, whether it is a single objective test question or a short scenario.

1Read the question and find the keyword: define, distinguish, advantage, disadvantage, or effect on performance.
2Decide whether each statement or scenario detail describes something designed by management (formal) or something that grew naturally (informal).
3Look for clues. Job titles, procedures, charts and official reports point to formal. Friendships, gossip, lunch groups and group norms point to informal.
4If asked for an effect, link it to behaviour first (motivation, communication, attitude to change), then to performance (output, efficiency, quality).
5Give both a positive and a negative effect unless the question asks for only one.
6For multiple response questions, count the number of options you must pick and test each option against the definitions.
7Check your answer matches the exact wording, for example 'informal' versus 'formal' or 'advantage' versus 'disadvantage'.

Quickest way: Designed or grown?

When to use it: Use this on objective test questions where you must classify a feature or statement quickly.

Ask: did management design this, or did it grow naturally?
Designed, written down or shown on a chart means formal.
Grown from friendships, shared interests or social contact means informal.
For advantage or disadvantage questions, remember: formal gives control but can be rigid; informal gives speed and morale but can resist management.
Eliminate options that mix the two types, then pick the best match.

Common mistakes in Formal and Informal Organisations

Saying informal organisations are always harmful.
Students link 'unofficial' with 'against the rules'.
Fix: State that informal groups can help (communication, morale, problem solving) or hinder (rumours, resistance). Give both sides.
Thinking the informal organisation appears on the organisation chart.
Students confuse relationships with reporting lines.
Fix: Remember that charts show only the formal structure. Informal links are unofficial and unwritten.
Treating the grapevine as a formal communication channel.
It carries real information at work, so it seems official.
Fix: Official channels are set by management, such as memos and meetings. The grapevine is informal, however fast it is.
Assuming a formal organisation has no flexibility problem.
Students focus on clarity and control only.
Fix: Mention that rigid rules and long reporting lines can slow decisions and reduce initiative.
Describing effects only on the group and not on performance.
Students stop at 'morale improves'.
Fix: Finish the chain: better morale leads to lower absence and turnover, and better output.
Mixing up the definition with the cause of an informal group, such as saying it is created by management.
Students hurry through definitions.
Fix: Use the phrase 'arises spontaneously from social needs' for informal and 'deliberately designed' for formal.

Worked examples

Example 1

A company has a written procedures manual and a clear chain of command. Staff in the finance department also eat lunch together daily and share advice on difficult tasks. Which of these is part of the informal organisation? Options: A The procedures manual; B The chain of command; C The lunch group sharing advice; D The job descriptions.

Show the solution

The procedures manual is written by management, so it is formal.
The chain of command is an official reporting line, so it is formal.
The lunch group formed naturally through social contact and is not designed by management, so it is informal.
Job descriptions are official documents, so they are formal.

Answer: C. The lunch group sharing advice is part of the informal organisation.

Example 2

Explain two ways in which an informal organisation can affect an organisation's performance, one positive and one negative.

Show the solution

Define the term briefly: the informal organisation is the unofficial network of relationships and groups that develops among staff.
Positive: informal networks speed up communication and give people support, which can raise morale and help problems get solved faster. This can improve productivity and reduce staff turnover.
Negative: informal groups can set their own norms, such as limiting output, or spread rumours and resist changes that management introduces. This can lower productivity and slow the implementation of strategy.
Conclude that managers should understand and work with informal groups rather than ignore them.

Answer: Positive: faster communication and higher morale improve productivity. Negative: group norms, rumours and resistance to change can reduce performance and delay strategy.

Exam tips

In objective tests, classify by asking who created it: management (formal) or the people themselves (informal).
In multiple response questions, pick exactly the number stated and check each option against both definitions.
Expect questions about advantages and disadvantages, so learn two or three of each for both types.
In Section B scenarios, underline clues such as 'friends', 'rumours' or 'procedures manual' and use them in your answer.
Link every effect to behaviour and then performance to show full understanding.

Practice questions from Business organisational structure

Formal and Informal Organisations 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 Organisations: frequently asked questions

What is the main difference between formal and informal organisation?

A formal organisation is the official structure designed by management, with set roles, rules and reporting lines. An informal organisation is the unofficial network of personal relationships and groups that forms naturally. The first is planned; the second grows by itself.

What are the advantages and disadvantages of an informal organisation?

Advantages include faster communication, better morale, social support and flexibility. Disadvantages include rumours, resistance to change and group goals that may conflict with management's aims.

Can management control the informal organisation?

Not directly, because it is not created by management. Managers can influence it by communicating openly, involving informal leaders and building a positive culture. Trying to suppress it usually backfires.

Is the grapevine part of the formal or informal organisation?

It is part of the informal organisation. It is the unofficial communication network that runs alongside official channels.