IB Business Management SLTopic 1 — Types of Business EntityPaper 1 & 2Core idea~10 min read
Sole Traders, Partnerships and Companies
Inside the private sector there are four structures you need to know, and they line up neatly. As you move along the line you get more owners, more money and more rules — and at one particular point, your personal savings stop being at risk. That point is the most important idea on this page.
📘 What you need to know
A sole trader has one owner. Easy to set up, total control, but unlimited liability.
A partnership has two or more owners who share the work, the money and the decisions — and usually still have unlimited liability.
A private limited company (Ltd) is a separate legal thing from its owners, so the owners get limited liability. Its shares are sold privately.
A public limited company (PLC) sells shares to anyone on a stock exchange, which raises huge sums but brings scrutiny and cost.
Limited liability means an owner can lose only the money they put in, never their house.
There is no “best” structure. The right answer depends on how much money is needed, how much risk there is, and how much control the owner wants to keep.
The ladder of ownership
Most businesses start small and simple. A person has an idea, starts trading, and worries about paperwork later. If it goes well they take on a partner, and later still they may turn the whole thing into a company. Each step gives them access to more money but costs them some control and some privacy.
The jump that really matters sits between partnership and private limited company. That is where the owner’s personal money stops being at risk.
Sole traders
A sole trader is a business with a single owner. They may still employ people — a barber with three staff is still a sole trader — but only one person owns it and carries the risk.
The attraction is speed and freedom. You can start trading almost immediately, keep every penny of profit, and change your prices on a Tuesday afternoon because you feel like it. The problem is that everything rests on one pair of shoulders: one skill set, one bank account, one person who can never really take a holiday.
Sole trader: advantages
Sole trader: disadvantages
Cheap and quick to set up, with very little paperwork
Unlimited liability — personal savings and property are at risk
Complete control over every decision
Hard to raise finance; banks see one person as a bigger risk
All the profit belongs to the owner
One person cannot be good at everything
Decisions are made instantly, so the firm reacts fast
Illness or holidays can stop the business trading
Simple tax arrangements and strong personal satisfaction
The business usually ends when the owner stops
Partnerships
A partnership is two or more people running a business together. It is common where the product is really the people themselves — law firms, accountants, dental practices, architecture studios.
Sensible partners write a partnership agreement before they start. It sets out how profits are split, who can vote on what, and what happens if somebody wants to leave. It sounds like dull paperwork, and it is exactly the document that saves the friendship when the business has a bad year.
Partnership: advantages
Partnership: disadvantages
More capital, because several people put money in
Usually still unlimited liability
A wider mix of skills and experience
Decisions must be agreed, so disputes are common
Work and worry are shared, so holidays become possible
Profits are often split equally even when effort is not
Still fairly cheap and simple to set up
One partner’s bad decision binds all of them
Losses are shared rather than carried alone
Ownership is difficult to transfer or sell
If a case study mentions partners falling out, the marks are usually in the agreement: who decides, how profit is split, how somebody leaves. Point at the missing document, not just the argument.
Limited liability: the idea everything turns on
Here is the whole thing in one scenario. A business owes 50,000 and cannot pay. What happens next depends entirely on whether the business is legally separate from its owner.
Limited liability does not make the debt disappear. It caps how far the debt can reach, and that cap is what makes people willing to invest.
Definition
Limited liability = an owner can lose only the money they invested, never their personal property
Private limited companies (Ltd)
To get limited liability, the owners turn the business into a company. There is a fee to pay, and a document called the Articles of Association that sets out who owns what and who votes on what. From that moment the company is a separate legal person: it can own things, owe money and be taken to court in its own name.
Ownership is split into shares, but those shares cannot be sold to the general public. They go to family, friends or invited investors, which is why so many private limited companies are family businesses.
Private limited company: advantages
Private limited company: disadvantages
Limited liability protects the owners’ personal assets
More expensive and slower to set up
Easier to raise finance; banks trust an incorporated business more
More legal rules to follow than a sole trader
Ownership can be transferred by selling shares
Accounts must be filed and audited every year
Looks more professional to customers and suppliers
Less privacy, since some financial information becomes public
The company continues even if an owner leaves
Small shareholders have little real say if the founder runs it
Public limited companies (PLC)
When a company grows fast it can need far more money than friends and family can supply. The answer is to go public: sell shares to anyone through a stock exchange. The first sale is called an initial public offering, and the whole process is a stock market flotation.
The money raised can be enormous — the biggest flotations in history have raised tens of billions of dollars in a single day. But the moment your shares are on open sale, strangers own part of your company and the world can read your accounts.
What a PLC gains
Why that matters
Access to capital
Very large sums can be raised quickly, often more cheaply than borrowing from a bank
Shared risk
Ownership is spread over thousands of shareholders, so no single person carries much of it
Liquidity
Shares can be bought and sold easily, which makes people more willing to hold them
Expertise
A board of directors brings outside experience the founders may lack
Profile
Being listed raises visibility with customers, suppliers and future investors
Continuity
Shares can be sold or passed on, so the company outlives its founders
The price of going public. Detailed accounts must be published, journalists comment on every decision, legal and accounting bills are large, and if enough investors buy shares the founders can lose control of their own business. Never write about flotation as if it is free money.
🧩 How to answer “which structure should they choose?”
How much money do they need? A market stall needs hundreds; a factory needs millions. Big numbers push you towards a company.
How risky is it? High risk of debt makes limited liability far more valuable.
How much control do they want? An owner who hates being told what to do will resist bringing in shareholders.
How big and how fast? A small, steady, local business rarely needs to be a PLC.
Then recommend, and say what would change your mind. That final sentence is where evaluation marks live.
Worked examples
WORKED EXAMPLE
Define the term limited liability. [2]
State the cap, then say who it protectsLimited liability means the owners of a company are only responsible for its debts up to the amount they have invested.Second element:Their personal assets, such as savings or a home, cannot be taken to pay the company’s debts.2 marks
WORKED EXAMPLE
Explain one advantage and one disadvantage for two friends of forming a partnership rather than each trading alone. [4]
Advantage — capital and skillsTwo people can put in twice the starting capital and cover each other’s weak areas, so the business can buy better equipment and open longer hours than either could alone.
Disadvantage — shared controlEvery major decision now needs agreement, which slows the business down and can cause serious disputes, especially if profits are split equally while one partner works harder.
Both points developed = 4 marksNotice both points are compared back to trading alone. The question said “rather than”, so the comparison is compulsory.
WORKED EXAMPLE
A bakery run as a sole trader has annual sales of 40,000 and wants to open two more shops. Recommend a suitable change of legal structure. [10]
Step 1: what does the business actually need?
It needs capital for two shops and protection if the expansion fails. Sales of 40,000 are far too small for a stock market flotation.Step 2: test the obvious option
Becoming a private limited company gives limited liability and makes borrowing easier, at the cost of set-up fees and annual accounts.
Step 3: test the alternative
Staying a sole trader keeps full control and zero paperwork, but every loan is secured against the owner personally.
Step 4: decide, then qualifyBecome a private limited company (Ltd)The extra paperwork is small next to the risk of losing a home. This would change if the owner could fund the shops from savings and wanted no outside investors at all.
💡 Exam tip
Use the numbers in the stimulus. A firm with tiny sales is not ready to float. Quoting the figure earns application marks.
Liability is the fastest mark on the page. Whenever risk, debt or failure is mentioned, bring it in.
Say what the owner loses, not only what they gain. More capital almost always means less control.
Recommend one option and stick to it. Sitting on the fence caps your marks, even if you wrote a lot.
Finish with a condition: “this depends on whether the owner is willing to give up some control”. That single sentence lifts a level 2 answer to level 3.
⚠ Common mix-up
A public limited company is not in the public sector. It is privately owned; “public” only means the shares are on open sale.
A sole trader can have employees. Sole refers to the number of owners, not the number of staff.
Limited liability protects owners, not the business. The company still owes every penny; it is the owners’ personal money that is out of reach.
Selling shares does not mean borrowing. Shareholders buy a slice of ownership; they are not lenders and cannot demand their money back.
Bigger is not automatically better. Plenty of successful firms stay private on purpose, to keep control and privacy.
Do not confuse profit with cash. A profitable firm can still fail to pay a debt on the day it falls due.
Up next: Social Enterprises That Make a Profit — businesses that trade like any other firm but exist for a cause, and put most of the surplus back into it.
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