The BCG matrix for smaller businesses: where to invest, what to keep and what to let go
Most owner-managed businesses sell more than one thing. A practice offers several services, a retailer carries several product ranges, a manufacturer serves several types of customer. Yet many owners spread their time, cash and marketing budget across all of them in roughly equal measure, simply because that is how it has always been done.
The BCG matrix is a simple way to step back and ask a harder question: which parts of the business deserve more investment, which should be kept ticking over, and which are quietly draining resources? It was developed by the Boston Consulting Group for large corporations, but with a few adjustments it works just as well for a business with five staff as for one with five thousand.
What the BCG matrix is
The matrix sorts each product, service or business line into one of four boxes, using two measures:
- Market growth – how quickly the market for that product or service is growing.
- Market share – how strong your position is in that market compared with your competitors.
Plotting the two measures against each other gives four categories:
| High market share (strong competitive position) |
Low market share (weak competitive position) |
|
| High market growth | Stars Strong position in a growing market. Need investment to keep up with growth.Product: a new range that customers are actively asking for, such as energy-saving or eco-friendly products. Service: a specialist service you are known for in a growing market, such as heat pump installation or R&D tax claims. |
Question marks Growing market, but you are not yet a leading player. Need a decision: invest or step back.Product: a new product line or online range that is still finding its customers. Service: a newly launched service with only a handful of clients so far. |
| Low market growth | Cash cows Strong position in a mature market. Generate more cash than they need.Product: core best-sellers with loyal repeat buyers and steady margins. Service: recurring contracts or retainers, such as annual servicing or monthly bookkeeping. |
Dogs Weak position in a slow market. Often tie up time and money for little return.Product: slow-moving lines that are regularly discounted or written off. Service: one-off, low-margin jobs that pull skilled staff away from planned work. |
The underlying idea is about cash. Cash cows fund the business. Stars and question marks consume cash because they need investment to grow. Dogs should be fixed, repositioned or released, so that time and money can go where they earn a better return.
Why it needs adapting for smaller businesses
The original model assumes you can measure your share of a national or global market, and that a high market share brings lower costs through scale. For most small businesses neither assumption holds. You are unlikely to know your share of the UK market, and you may not be competing nationally at all.
The answer is to use measures you can actually see in your own figures:
- Instead of market growth, look at the growth in demand you can observe: enquiries, orders or sales for that line over the last two or three years, and whether your customers and local competitors are seeing the same trend.
- Instead of relative market share, judge your competitive strength: your gross margin on that line compared with your others, how often you win the work when you quote, repeat business, pricing power, and whether you are known for it locally or in your niche.
- Add a third measure: contribution. Small businesses rarely fail for lack of strategy. They fail for lack of cash. Showing the gross profit each line contributes (for example, as the size of a circle on the chart) keeps the analysis grounded in pounds, not just positions.
It also helps to analyse at the right level. For a small business, the “units” are usually service lines, product ranges, customer segments or sales channels, rather than individual products.
How to apply it in five steps
- List your main products, services or income streams. Aim for four to eight. A business that sells both can put products and services on the same chart. Too few and the exercise tells you nothing. Too many and it becomes a spreadsheet rather than a decision tool.
- Pull the numbers for each one. Sales and gross profit for the last two or three years, the number of customers, and any direct costs or staff time you can allocate. Your management accounts and bookkeeping software should give you most of this.
- Score growth and strength. A simple score of 1 to 5 for each is enough. Be honest: the value of the exercise comes from challenging the stories we tell ourselves about our favourite products.
- Place each line on the matrix. Draw it on a sheet of paper or a whiteboard, with growth on the vertical axis and strength on the horizontal axis. Size each circle by its gross profit.
- Agree an action for each one. The matrix is only useful if it changes what you do next month.
What to do with each category
Stars – invest to keep the lead. These are your future cash cows, but only if you keep pace with the market. They usually need people, systems, stock or marketing ahead of the revenue. Plan the cash carefully: a growing star can create a cash squeeze even while it is profitable on paper.
Cash cows – protect and harvest. Keep service levels and margins high, and resist the temptation to cut the investment that keeps them strong. Use the surplus cash they generate to fund stars and carefully chosen question marks, and to build reserves.
Question marks – decide, don’t drift. These lines are the hardest to manage. Set a clear test, a budget and a time limit: for example, “if we can win ten new clients for this service in the next nine months at a margin of at least 40%, we invest further; if not, we stop.” Without a decision, question marks quietly absorb management time for years.
Dogs – fix, reposition or exit. Not every dog should be dropped. A low-growth, low-margin service may bring in customers who buy your more profitable lines, or it may be needed to offer a complete service. But if it has no strategic role, consider raising prices, simplifying it, outsourcing it or withdrawing it, and redeploying the people and space it uses.
Worked examples: a service business and a product business
A service business
Consider a small building services company with four income streams:
- Heat pump and solar installations – demand rising quickly, and the company has built a good local reputation and accreditation. A star: worth investing in training, vans and marketing, with a cash flow plan to fund the growth.
- Boiler servicing contracts – a steady, mature market where the company has many loyal, repeat customers and good margins. A cash cow: protect the service quality and use the regular income to fund the heat pump expansion.
- Smart home installations – a growing market, but the company has only done a handful of jobs and faces strong competition. A question mark: run a six-month trial with a set budget and a target number of jobs before committing further.
- Small one-off plumbing repairs – low margins, unpredictable, and taking skilled engineers away from planned work. A dog: raise the minimum charge, offer it only to contract customers, or refer it to a trusted local partner.
A product business
Now consider a small food producer selling through local shops and its own website:
- Plant-based snack range – sales growing fast online and repeat orders are strong. A star: invest in production capacity and packaging, and plan the cash needed for extra stock.
- Classic range in local delis and farm shops – a steady, mature market with loyal stockists and reliable margins. A cash cow: keep quality and supply consistent, and use the income to fund the snack range.
- Monthly subscription boxes – a growing market, but only a small number of subscribers and plenty of competition. A question mark: set a subscriber target and a marketing budget for six months, then decide.
- Seasonal gift hampers – high packaging and delivery costs, unsold stock after Christmas and thin margins. A dog: reduce the range, take pre-orders only, or drop it.
The same approach works for a professional practice (compliance work as the cash cow, advisory services as the star), a retailer (core ranges versus new online lines) or a hospitality business (dining, events and takeaway).
How the matrix links to the 7-stage business life cycle
Your business moves through the 7 stages of the business life cycle, and each product or service you sell follows a similar path of its own: it starts as a question mark, becomes a star if it wins, matures into a cash cow, and eventually turns into a dog. Knowing your stage tells you what mix of products and services to expect, and where the gaps are.
| Life cycle stage | Typical portfolio | What to focus on |
| 1Seed & Development | Question marks | Almost everything is a question mark. Test ideas cheaply and choose the one with real demand to back. |
| 2Start-up / Launch | Question marksStars | Concentrate cash and time on the question mark showing traction, so it can become your first star. Drop distractions early. |
| 3Growth | StarsQuestion marks | One or two stars drive the business. Fund them properly, plan the cash for growth and limit new side projects. |
| 4Established | Cash cowsStars | Early stars mature into cash cows. Protect their margins and use the surplus to develop your next stars. |
| 5Expansion | Cash cowsQuestion marks | Cash cows fund new question marks: new locations, markets, products or acquisitions. Give each one a target, a budget and a deadline. |
| 6Maturity / Shake-out | Cash cowsDogs | Mostly cash cows, with dogs starting to appear. Cut or reprice the dogs and look for new stars before demand flattens. |
| 7Exit, Decline or Renewal | DogsCash cowsQuestion marks | Cash cows weaken into dogs. Either harvest and prepare for a sale, sell individual lines, or reinvest in new question marks to renew the business. |
Solid chips show the category that usually dominates at each stage, lighter chips the one to watch. Click a stage to read more about it.
A useful test: if your matrix does not match your stage (for example, an established business with no cash cows, or a mature business with no new question marks), that is often the first sign of a cash squeeze or a stall in growth.
Tax and finance points to consider
Decisions made from the matrix often have tax and funding consequences, so it is worth taking advice before you act:
- Investing in stars: capital allowances, including full expensing for companies and the annual investment allowance, may reduce the cost of equipment and vehicles. Development work on new products or processes may qualify for research and development tax relief.
- Funding growth: stars and question marks often need external finance. A clear cash flow forecast and management information make it easier to secure business funding on good terms.
- Selling or closing a dog: disposing of part of a business can create a capital gain, VAT questions and employment obligations. The availability of reliefs such as Business Asset Disposal Relief depends on how the disposal is structured, so plan early. See our capital gains tax planning service.
- Using cash cow profits: review how surplus profits are extracted or reinvested, including salary, dividends and pension contributions. See profit extraction.
Common mistakes to avoid
- Using turnover instead of profit. A high-turnover line can be a dog once direct costs and staff time are allocated.
- Doing it once. Markets move. Review the matrix at least once a year, ideally alongside your budget.
- Ignoring the links between lines. Some services exist to win customers for others. Check what you would lose before cutting anything.
- Starving the cash cow. Under-investing in your most reliable income to fund new ideas can weaken the whole business.
- Treating it as the only tool. The matrix shows where to look. It does not replace a proper review of costs, pricing, customers and cash flow.
How Silver Throne can help
We help owner-managed businesses turn their accounts into decisions. Our business intelligence service analyses profitability by product, service, customer and channel, so you can see which lines really are your stars and cash cows. We can also prepare cash flow forecasts, review your KPIs, and advise on the tax impact of investing in, restructuring or selling part of your business.
To talk through your own matrix, book an appointment, call us on 0333 880 8400, or send us a request for proposal.
This article gives general information only and is not advice for your circumstances. Please speak to a member of Silverthrone before acting.
