How To Improve Margins Through Product Group Expansion - The Easy Way
- Paul Bensley
- Jun 17
- 8 min read
Updated: 6 days ago
For years I’ve watched businesses approach product expansion in almost exactly the same way.
The R&D or product team book a meeting. They review market reports that don’t always tell the whole story. Ideas are debated internally, a few prototypes are sketched out, and eventually something is presented to the board and then to the sales team.
At that point everyone sits back and hopes.
Some products work. Some don’t. And very few people can clearly explain why.
What baffles me is that the single most obvious ingredient is often missing from the process:
Customers.
We are still managing by hope, not on purpose
If you’re lucky, a product team might speak to a handful of customers in a focus group. More often they speak to none at all.
Decisions about range expansion (which should be one of the most powerful levers for improving sales and gross margin) are made largely inside meeting rooms.
Then we act surprised when the market response is lukewarm.
I’ll die on this hill: the best way to grow sales and margin through complementary products is simply to ask customers, at scale, what they actually want to buy from you.
Not what we think they should want. Not what a report suggests. What they would genuinely switch spend to tomorrow.
Put commercial and product in the same boat
The breakthrough happens when commercial teams are involved alongside product teams from day one.
Salespeople hear every day:
what customers are buying elsewhere
what frustrates them about current suppliers
where they feel overcharged
which products are “good enough” and which need to be better
Those conversations are gold dust - yet they rarely shape formal product strategy.
The questions are everything. For example:
Are there other products you’re buying from elsewhere that you’d like to be better value, performance or reliability?
What specifically would need to improve?
How much do you currently spend on those items?
If we produced that product with those changes, what would stop you switching supply to us?
Ask that of dozens, ideally hundreds of customers and something remarkable happens.
You don’t end up with vague ideas. You end up with:
a clear specification
a realistic price point
immediate, quantifiable market opportunity
Validate before you build
Only then should prototypes begin.
And even then the process should loop back to the same customers:
“Here is the spec we’ve shaped from your feedback. Here is the price. Here is the availability. If we produce this, would you switch your supply to us?”
Some further development may be needed. Fine - test again.
By the time the product reaches launch you already have:
committed customers
known volumes
confidence in margin
sales to existing accounts rather than expensive new acquisition
That is product expansion on purpose.
Product Group Expansion & Why this matters for margin
Selling more to existing customers is almost always the most profitable growth a business can find.
No new acquisition cost. No long trust-building cycle. Fewer surprises on credit or payment behaviour.
Yet most companies still gamble on internally designed extensions while ignoring the simplest route to margin improvement: build what your current customers are already buying from someone else.
Final thought
This isn’t complex strategy. It’s disciplined listening.
Talk to enough customers, ask the right questions, aggregate the answers and the market will practically design the product for you.
Do that and product group expansion stops being a leap of faith and becomes one of the most reliable engines of sales and gross margin a business can have.
I’ll keep sharing practical, commercial-first approaches like this in my other articles on my website and here on LinkedIn for anyone interested in growing revenue the simple way rather than the traditional way.
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FAQs
What is product group expansion?
Product group expansion means adding complementary products or categories to an existing range so customers can buy more from the same supplier. Done well, it can increase revenue, share of wallet and gross profit without relying entirely on acquiring new customers.
How can product expansion improve gross margin?
Product expansion can improve gross profit by capturing additional spend from customers the business already serves. Because the customer relationship already exists, the business may avoid some of the acquisition costs and commercial effort associated with winning completely new customers. The economics still depend on product margin, cost-to-serve and working-capital requirements.
What is the easiest way to identify new products to sell?
Ask existing customers what products they currently buy from other suppliers that they would consider buying from you instead. Then investigate what would need to change in price, quality, performance, availability or service for them to switch.
Why should businesses ask customers before developing new products?
Customers can provide direct evidence about what they already buy, what frustrates them, how much they spend and what would cause them to switch supplier. This gives product teams stronger commercial evidence before investing in development.
What questions should you ask customers when considering product expansion?
Useful questions include: What else are you buying from other suppliers? What would you like to improve about those products? How much do you currently spend? What price would you expect? And what would stop you switching that spend to us?
How do you identify cross-selling opportunities with existing customers?
Examine the customer's wider purchasing requirements and identify products they buy elsewhere that are adjacent to your existing offer. Customer interviews, account reviews and purchasing data can help estimate the share of wallet currently going to competitors.
What is share of wallet?
Share of wallet is the proportion of a customer's total spending within a relevant category that goes to your business. Increasing share of wallet means capturing more of the customer's existing expenditure rather than relying solely on increasing the size of the overall market.
Why is selling more to existing customers attractive?
Existing customers already understand the business, its products and service proposition. This can reduce some of the friction associated with acquiring new customers and make complementary products easier to introduce, particularly when there is already trust and regular commercial contact.
Should sales teams be involved in product development?
Yes, particularly when developing products for existing markets. Salespeople regularly hear what customers are buying, where competitors are strong and what frustrates customers about existing solutions. That information can provide valuable input alongside product, technical and market research.
What role should product teams play in customer-led product development?
Product teams can translate customer needs into specifications, technical requirements, manufacturing options and viable propositions. The strongest approach combines commercial customer insight with the technical expertise required to determine whether the opportunity can be delivered profitably.
How can sales and product teams work together on range expansion?
Commercial teams can help identify and quantify customer demand, while product teams evaluate feasibility and develop the solution. Both teams can then return to customers to test specification, price, availability and switching intent before significant investment is committed.
What does “validate before you build” mean?
It means testing the commercial assumptions behind a new product before committing fully to development or launch. Businesses can show potential customers the proposed specification, price and proposition and ask whether they would genuinely switch their existing spend.
How can businesses validate demand for a new product?
Speak to enough relevant customers to establish whether demand is repeated rather than anecdotal. Quantify current expenditure, likely switching volume, acceptable pricing and customer requirements, then test the proposed solution with those customers before launch.
Is customer feedback enough to justify launching a product?
Not by itself. Customers may express interest without eventually purchasing. Feedback should therefore be combined with analysis of market size, economics, technical feasibility, competitive response, operational complexity and credible purchase intent.
How many customers should you speak to before launching a new product?
There is no universal number. The objective is to gather enough feedback across the relevant customer base to identify consistent patterns rather than relying on a handful of individual opinions. Larger opportunities generally justify broader validation.
How do you estimate the revenue opportunity for a new product?
Identify how much target customers currently spend on the category, estimate what proportion could realistically switch and multiply this across the addressable customer base. The assumptions should then be adjusted for likely conversion, pricing, volume and implementation timing.
How do you estimate the margin opportunity from product expansion?
Revenue potential should be combined with expected gross margin, cost-to-serve, development cost, inventory requirements and other incremental costs. A large revenue opportunity is not necessarily attractive if the economics of supplying it are poor.
Why do new product launches fail?
New products can fail because businesses overestimate demand, misunderstand customer needs, choose the wrong price, underestimate competitive response or develop products without sufficient customer validation. Internal enthusiasm is not evidence of external demand.
What is customer-led product development?
Customer-led product development uses structured customer insight to help determine what should be developed, which problems should be solved and what customers are likely to value enough to buy. Customers inform the opportunity rather than simply being asked for feedback after the product has already been designed.
Should customers design your products for you?
Not literally. Customers are valuable sources of information about problems, dissatisfaction, desired outcomes and purchasing behaviour, while the business still needs to apply technical, commercial and strategic judgement to determine the best solution.
How can businesses reduce the risk of new product development?
Validate the major assumptions before committing significant resources. Test whether there is a real customer problem, sufficient expenditure, acceptable pricing and credible willingness to switch. Development can then proceed through repeated customer feedback and refinement rather than one large bet.
Why is asking customers what they buy elsewhere so powerful?
It moves the conversation from hypothetical demand to existing expenditure. Instead of asking customers whether they might like an imaginary product, the business identifies something they already purchase and investigates what would be required to transfer that spend.
What does “build what your customers already buy from someone else” mean?
It means looking for growth within your existing customer relationships by identifying relevant products they currently source from competitors. If the business can offer a sufficiently compelling alternative, it can capture existing demand rather than having to create demand from nothing.
Can product expansion increase customer retention?
Potentially. Providing more of the products customers need can deepen the commercial relationship and make the supplier more valuable. However, expansion should remain relevant and well executed. Adding products that create service problems or unnecessary complexity can have the opposite effect.
What are the risks of expanding a product range?
Risks include inventory growth, working-capital requirements, operational complexity, cannibalisation, weak demand and distraction from core products. Product expansion should therefore be based on attractive customer demand and economics rather than simply increasing the number of products offered.
When should a business not expand its product range?
Expansion may be inappropriate when customer demand is weak, margins are unattractive, the product creates excessive complexity or the business lacks the capability to deliver it effectively. More products do not automatically create more value.
What is the biggest mistake businesses make with product range expansion?
One of the biggest mistakes is developing the product internally and asking customers what they think after most of the important decisions have already been made. Customer validation should influence what gets built, not simply validate something the business already wants to build.
What is a practical process for customer-led product expansion?
A simple process is:
Identify adjacent customer spend → ask customers what they buy elsewhere → quantify the opportunity → identify unmet needs → develop the proposition → test specification and price → validate switching intent → launch → measure actual conversion and margin.
This turns product expansion from an internally generated idea into a commercially validated growth process.
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