Small or Medium Sized Enterprises (SMEs) (AQA A Level Business): Revision Note

What is an SME?

• An SME is a business that falls below a set size, measured using employee numbers, annual turnover and company value

  • Under UK company size thresholds a business must meet at least two of the three criteria in a category to qualify for it

• Any business with 250 or more employees is classed as a large business

SMEs in the UK

• In 2026, small and medium-sized enterprises (SMEs) made up 99.85% of all UK private sector businesses

  • 5.64 million businesses (99.18%) are micro- or small, with 0 to 49 employees

  • 38,435 businesses (0.67%) are medium-sized, with 50 to 249 employees

  • Only 8,335 businesses (0.15%) are classed as large

• SMEs employed around 16.9 million people, approximately 60% of the UK's total private sector

  • Around 75% of all UK businesses operate with no employees beyond the owner

  • The majority of the SME population is made up of very small, owner-run businesses rather than medium-sized companies

• They generated an estimated £2.8 trillion in revenue, around 51% of the UK private sector's total revenue of £5.5 trillion

Source: DBT Business Population Estimates

Advantages of SMEs

Flexibility and fast decision-making

• With fewer layers of management, owners and managers can respond quickly to changes in customer needs or market conditions

Example

Gymshark's early rapid response to trends among fitness influencers allowed it to grow quickly from a small start-up business into a major fitness brand

Personalised customer service

• Their smaller size allows closer relationships with customers, helping to build loyalty that larger, more impersonal competitors may struggle to match

Lower overheads

• SMEs often operate with simple management structures and small premises

• This keeps fixed costs lower than those of their larger rivals

Ability to serve niche markets profitably

• SMEs can specialise in small, specific markets that are not large enough to attract interest from bigger competitors

Example

Charlie Bigham's built a successful business around premium, restaurant-quality ready meals

This was a specific niche that larger supermarket ready-meal ranges did not serve as effectively

Strong entrepreneurial culture

• Owner-managers often have direct control and strong personal motivation

• This allows new ideas to be implemented quickly without needing to persuade multiple layers of management

Access to targeted government support

• SMEs can benefit from schemes not available to larger businesses

• Examples include the UK government's Small Business Rate Relief and enhanced research and development tax credits, reducing their costs relative to larger rivals

Disadvantages of SMEs

Limited access to finance

• Lenders often see small businesses as higher risk due to limited trading history or collateral

• This often leads to higher interest rates or difficulty securing loans compared with larger, more established rivals

Lack of economies of scale

• SMEs rarely benefit from bulk buying in the same way as larger competitors, and cannot spread fixed costs over as many units of output

  • This means they have to operate with higher unit costs than larger rivals

Limited resources for marketing and innovation

• Smaller budgets restrict how much an SME can invest in advertising, research and development or new technology compared with larger rivals

Example

Bird & Blend Tea Co. began as a small market stall and struggled to get enough funding from banks to open more shops. Instead, it raised money directly from customers through crowdfunding on platforms like Crowdcube

Vulnerability to cash flow problems

• SMEs typically hold smaller cash reserves

• A single late payment from a customer or an unexpected cost can seriously threaten the business's survival

Owner or manager overload

• In many small businesses, one person is responsible for finance, HR, operations and marketing

• This increases the risk of poor decisions due to a lack of specialist expertise in any one area

Weaker negotiating power

• SMEs often have less bargaining power with large suppliers or customers

• They also have less financial resilience to withstand a price war or economic downturn than larger competitors