How to Use the BCG Matrix to Make Smarter Business Decisions

How Does the BCG Matrix Work?

The BCG Matrix grid has two axes. Market growth rate runs vertically. Relative market share runs horizontally. Each product becomes a circle placed where its two numbers meet, and the circle’s size usually reflects revenue.

Teams commonly draw the line between high and low growth at 10% and the line between high and low share at 1.0. Treat those as starting points. A mature industry like cement may call 5% growth high, while a software category may need 20%.

Market Growth Rate

Market growth rate shows how fast the whole market is expanding, not just your product. It signals how much cash a product will need. Fast markets demand spending on capacity, marketing and distribution to keep up.

If the market grows 15% a year and you grow 5%, you’re losing ground even though sales are rising.

Relative Market Share

Relative market share compares your sales to those of your largest competitor. A figure above 1.0 means you lead the market. A figure of 0.4 means you sell 40% of what the leader sells.

Why not use plain market share? Because 15% share means very different things in a market where the leader holds 16% and one where the leader holds 60%.

This is what a typical BCG matrix diagram looks like.

	High relative share (above 1.0)	Low relative share (below 1.0)
High growth	Stars	Question Marks
Low growth	Cash Cows	Dogs

Also read: What is the Product Life Cycle? Stages, Key Strategies and Effective Management Tips

What Are the Four Quadrants of the BCG Matrix? 

Each quadrant shows a different combination of growth in the market and competitive advantage.

Each quadrant requires a different action. 

BCG Matrix Diagram

Stars: When Should Businesses Invest in High-Growth Products?

Stars lead fast-growing markets. They earn well but also consume cash, since staying on top means constant spending on capacity, features and promotion.

Invest in them as long as the market keeps growing. The goal is to hold the lead until growth slows. At that point a Star turns into a Cash Cow, which is exactly what you want.

Think of a leading electric scooter model in a city where adoption is climbing 25% a year. You’d keep funding service centres and battery supply, even if profit looks thin for now.

Cash Cows: How Can Businesses Maximise Consistent Returns?

Cash Cows hold a big share of a slow market. They need little investment and produce steady cash. Packaged tea, basic accounting software and tooth powder often fit here.

Protect them, but don’t overspend. Focus on cost efficiency, loyalty and small product refreshes. Their real job is to pay for Stars and Question Marks.

A word of caution. A cow can turn into a problem when a company uses it too much. 

Question Marks: Should Businesses Invest in or Divest These Products?

Question Marks sit in growing markets but hold a small share. They burn cash and may or may not pay off. This is the hardest quadrant to judge.

Don’t fund them all. Pick the two or three with real evidence of traction, such as rising repeat purchase or strong reviews, and back them hard. Drop or sell the rest.

Half measures fail here. A product with a tiny budget in a fast market rarely climbs. It just slides into the Dog quadrant when growth cools.

Dogs: When Should Businesses Reposition or Discontinue Products?

Dogs have a low share in slow markets. They rarely earn much and they tie up management attention. Most should be fixed, sold or shut.

Look before you cut, though. Some Dogs cover shared costs, bring in customers who buy other products, or serve a profitable niche. Check three things before deciding.

• Does it still generate positive cash flow
• Do other products depend on it
• What would exit actually cost

If the answers are no, no and a lot, you probably keep it for now and stop investing. Otherwise, trim it.

Must read: Strategic Management Process: Steps, Models, and Examples

How to Calculate Market Growth Rate and Interpret the BCG Matrix?

You don’t need special software. A spreadsheet and reliable sales figures are enough. The harder part is getting trustworthy market data, which we’ll come back to.

How to Calculate Relative Market Share

Divide your product’s sales by the sales of your largest competitor in the same market.

Relative market share = your product’s sales ÷ largest competitor’s sales

Suppose your product sells ₹40 crore and the top rival sells ₹20 crore. Your relative share is 2.0. If you sell ₹10 crore and the leader sells ₹25 crore, it’s 0.4.

One thing to remember. If you’re the leader, you compare yourself to the second-largest player, not to yourself.

How to Calculate Market Growth Rate

Compare total market sales this year with last year.

Market growth rate = (this year’s market sales − last year’s market sales) ÷ last year’s market sales × 100

If the market was ₹500 crore last year and is ₹560 crore now, growth is 12%. Using a three-year average smooths out one-off spikes.

Here’s how a sample portfolio might read.

Product	Market growth	Relative share	Quadrant
Protein bar	18%	0.4	Question Mark
Premium chips	14%	1.8	Star
Canned soup	3%	2.2	Cash Cow
Rice cakes	2%	0.3	Dog

Do read: Decision Making Models: The Complete Guide for Business and Leadership

How to Use the BCG Matrix to Make Better Business Decisions?

Plotting is the easy part but taking decisions is the main point. Here’s how to turn the grid into action.

Prioritize those Products that Require Further Investment

Start by ranking Stars followed by Question Marks. Choose Question Marks near the 1.0 share curve since they require less effort to move ahead.

Define your criteria for approval before providing funds. For instance, the protein bar should have reached 0.7 relative share in 18 months, or else there is no more funding.

Use Cash Cows to Fund Future Growth

Move surplus cash from mature lines into growth lines. A company might take 20% of the soup profit each year and put it behind the protein bar.

Track it openly. If nobody can say where Cow profit went, it usually disappears into general overhead.

Identify Products That Need Repositioning or Divestment

Dogs and failing Question Marks deserve a hard look. Options include a new price point, a narrower target audience, a sale to a smaller player, or a clean shutdown.

Repositioning works when the product is sound but aimed at the wrong buyer. It doesn’t work when the market itself is shrinking.

Manage Investment Risks Across the Product Portfolio

A healthy portfolio has a mix. Too many Question Marks drain cash. Too many Cows leave you with no future growth. Too many Dogs signal that nobody’s been pruning.

Aim for a balance where Cows fund Stars and a few chosen Question Marks. Review the spread each year and ask whether next year’s Cows are being built today.

Also read: Techniques of Decision-Making: 15+ Tools & Methods for Success

What Are the Advantages and Limitations of the BCG Matrix?

The model is very simple, and that’s both its strength and its weakness. It still misses a few points. Here are the advantages and disadvantages:

Advantages	Limitations
Easy to build and explain	Reduces a product to two variables
Links strategy to cash flow	Ignores synergies between products
Helps rank competing budget requests	Needs reliable market data
Works for products or business units	Market definition changes the result

The market definition problem is real. Define “snacks” broadly and your protein bar looks tiny. Define it as “protein snacks” and it might lead. Same product, different quadrant.

Share also doesn’t always equal profit. Some low-share players earn excellent margins in niches. And a high-growth label says nothing about whether that growth will last, which is why the grid works best alongside other tools like SWOT or the Ansoff Matrix.

Use it as a starting point for discussion. Don’t treat the quadrant label as a verdict.

Conclusion

The BCG Matrix earns its place because it forces honest answers about where money comes from and where it goes. Plot your products, run the two formulas, and match each quadrant to a clear action. Fund the Stars, protect the Cows, test the Question Marks and review the Dogs.

Then do it every year. Markets can move, and a Star today can be a Cow in two years. Start with your three biggest products and see where they land.

Ready to start your journey? Book a free consultation with upGrad today to find the best path for your career.