Many companies pride themselves on maintaining strong profit margins. Executives often view margins as a key indicator of operational discipline and business health.
But an excessive focus on maintaining high margins can unintentionally limit growth.
In practice, many companies reject initiatives that would increase total profits simply because those initiatives dilute their margin percentage. This mindset can prevent organizations from scaling, investing in new opportunities, and expanding their competitive position.
Strategic decision-making should not focus on protecting margin percentages. Instead, it should focus on maximizing incremental profit and long-term enterprise value.
The Margin Illusion
Profit margins are an average metric. They describe how profitable a business has been historically. Strategic decisions, however, should not be evaluated using historical averages. They should be evaluated using incremental economics.
You should ask about the returns on your next invested dollar. If the returns are profitable and above your cost of capital, you should make the investment, regardless of what it does to your profit margins.
This distinction between average margin and incremental margin is fundamental but often misunderstood in operating decisions.
A company that rejects profitable opportunities because they reduce average margins is effectively choosing lower total profits.
The Marginal Advertising Decision
Consider a company with the following current performance:
Revenue: $1,000,000
Profit margin: 10%
Total profit: $100,000
The company is evaluating whether to increase advertising spending.
Suppose an additional $100,000 in advertising generates $200,000 in incremental revenue. After accounting for production, fulfillment, and overhead costs, the incremental profit margin on this new revenue is 8%.
Many leaders hesitate in this situation because the incremental margin (8%) is lower than the existing margin (10%) and dilutes the overall profit margin metric of the organization.
But this comparison is misleading.
The correct comparison is total profit before and after the decision. The business just increased total profit by 16 percent, even though average margins declined slightly.
Rejecting this opportunity to preserve margin percentage would leave meaningful profit unrealized.
The Correct Decision Rule
The decision framework for growth investments is straightforward. Continue investing as long as incremental profit remains positive.
In economic terms, firms should expand activity until the marginal return approaches zero.
This applies to many common business decisions:
- advertising and marketing spending
- hiring additional employees
- expanding production capacity
- launching new products
- entering new geographic markets
- adding new sales channels such as wholesale
In each case, the key question is whether the incremental investment generates positive profit.
If it does, the initiative contributes to growth even if it reduces the average margin.
At any given scale, businesses should continuously work to improve operating efficiency and expand profit margins. However, margin optimization should never come at the expense of growth. The primary strategic objective should always be to expand the level of business: whether through increased market share, higher revenue, broader geographic reach, or new product lines. As long as a project generates a return greater than the firm’s weighted average cost of capital (WACC), it creates economic value and should be seriously considered, even if it temporarily dilutes average margins.
Hiring and the Margin Dilution Effect
The same logic applies to hiring decisions.
Payroll increases are often viewed as a threat to margins, particularly in small and mid-sized businesses where founders closely monitor operating expenses.
However, hiring expands the organization’s capacity to:
- produce more goods or services
- support additional customers
- launch new initiatives
- accelerate execution
For example, a business generating:
Revenue: $2 million
Profit margin: 10%
Profit: $200,000
may hire additional staff to expand operations and grow to:
Revenue: $5 million
Profit margin: 8%
Profit: $400,000
While margins declined, total profit doubled.
Focusing solely on margin preservation would have prevented this growth.
Scale Creates Strategic Options
Higher revenue and larger profit pools create flexibility.
Companies with greater scale can reinvest profits to:
- improve operational efficiency
- negotiate better supplier terms
- expand product offerings
- enter new markets
- strengthen brand presence
Over time, these investments can actually improve margins again through operational leverage.
In contrast, businesses that resist growth investments often remain trapped in a cycle of small-scale operations with limited strategic flexibility.
Revisit the example chart earlier in the article. Most companies would have chosen to not make the investments in growth as they dilute the margins. In that case, the revenue stays at $1M and the profits stay at $0.3 M. On the other hand, making the investments in growth until the incremental profits become zero leads the company to a $8 M revenue and $1.52 M in profits.
The margins decline from 28% to 19% in this example. Would you give up this much margin for a 5 times increase in net profit? Or would you rather stay with higher margin and lower profit?
Why Companies Fall Into the Margin Trap
Several behavioral and organizational factors contribute to margin-focused decision making.
Percentage Bias
Executives naturally gravitate toward percentage metrics because they appear cleaner and easier to benchmark. However, businesses ultimately generate value through absolute profit dollars, not percentages.
Risk Aversion
Growth investments involve uncertainty. Protecting existing margins can feel safer than pursuing initiatives with uncertain outcomes.
Misaligned Incentives
When performance metrics emphasize margin targets rather than total profit growth, managers may avoid profitable investments that dilute margins.
A Better Way to Evaluate Growth Investments
Organizations benefit from evaluating growth initiatives through two lenses:
Incremental return on investment
Does the next dollar invested generate positive profit? Is this profit above the weighted average cost of capital? If it costs you 5% to borrow and you can invest in a project that returns 8%, it is a great investment even if it brings your net margin % down.
Total profit expansion
Will the initiative increase overall profit for the business?
When both conditions are satisfied, declining average margins should not be viewed as a negative outcome. Instead, it may indicate that the company is investing effectively in growth.
Conclusion
Profit margins remain an important indicator of operational efficiency. But when businesses focus too heavily on protecting margin percentages, they risk rejecting opportunities that would increase profits and expand the organization.
Growth requires investment, and investment often comes with temporary margin dilution.
Executives who understand the difference between average margins and incremental profitability are better positioned to make decisions that scale their businesses over time.
Sometimes the most profitable decision is not the one that protects margins. It is the one that deploys capital into opportunities that generate positive incremental returns and build long-term competitive advantage.