Maximizing Profits: The Strategy of Combined Leverage

Every business decision-maker eventually faces a moment of truth: should the company invest in more machinery, take on a bigger loan, or expand operations using its own capital? These choices look unrelated on the surface, but they are tied together by a single financial concept called combined leverage. It explains why a small bump in sales can sometimes turn into a massive jump in profits, or why a slight dip in revenue can wipe out earnings entirely. For finance managers, understanding combined leverage is the difference between making a calculated bet and rolling the dice.

What is combined leverage? 🔗

Combined leverage is the total magnifying effect that fixed costs (both operational and financial) have on a company’s earnings per share when sales fluctuate. It brings together two separate but connected ideas: operating leverage and financial leverage. The degree of total leverage, also called combined leverage, compares the rate of change in earnings per share to the rate of change in sales revenue. Put simply, it answers one critical question for managers: if my sales increase by 1%, by how much will my actual earnings per share change?

The reason combined leverage matters is that companies rarely deal with just one type of fixed cost. A manufacturer pays rent on its factory, salaries to permanent staff, and depreciation on machinery (operating fixed costs). At the same time, it also pays interest on bank loans and dividends on preference shares (financial fixed costs). Both these obligations stay the same regardless of how much the business sells, which means they amplify the impact of every additional rupee of revenue.

Breaking down the two forces behind combined leverage 🔗

Before diving deeper, it helps to understand the two underlying components that come together to create combined leverage. Each plays a distinct role in shaping how sales translate into profits.

Operating leverage 🔗

Operating leverage focuses on the cost structure of a company. It measures how sensitive earnings before interest and taxes (EBIT) are to changes in sales volume. Businesses with high fixed operating costs (think airlines, hotels, or steel plants) typically have high operating leverage. A small percentage change in sales can produce a much larger percentage change in operating profit because the fixed costs do not move with revenue.

For instance, a luxury hotel running at 60% occupancy versus 70% occupancy doesn’t see its electricity bills, staff salaries, or building maintenance costs change much. The extra rooms sold contribute almost entirely to operating profit, since the variable costs per guest are minimal compared to the fixed cost base.

Financial leverage 🔗

Financial leverage, on the other hand, looks at how a company finances itself. Financial leverage measures the financial risk of the company by examining the percentage change in earnings per share relative to changes in operating income. When a business borrows money, it has to pay interest. This interest is a fixed cost that doesn’t care whether the business is having its best year or its worst year.

The more debt a company carries, the higher its financial leverage. This means that once operating income rises beyond the interest payment threshold, every additional rupee of operating profit goes straight to the shareholders, boosting earnings per share dramatically. The flipside, of course, is that when operating income falls, EPS can collapse just as quickly.

The formula for combined leverage 🔗

The Degree of Combined Leverage (DCL) is the metric that quantifies this whole effect. There are two practical ways to calculate it, both of which produce the same answer.

The first method is the multiplication approach. DCL is calculated by multiplying the Degree of Operating Leverage (DOL) by the Degree of Financial Leverage (DFL). So if a company has a DOL of 2 and a DFL of 1.5, its DCL is 3. This means a 1% change in sales will produce a 3% change in EPS.

DCL = DOL × DFL

The second method works directly from the income statement using the contribution margin and earnings before tax:

DCL = Contribution / Earnings Before Tax (EBT)

Here, contribution is calculated as Sales minus Variable Costs. This formula is particularly useful because it shows the cushion between gross profit and taxable income, helping managers see exactly where the company stands.

A practical example to bring it to life 🔗

Consider a mid-sized tour operator running heritage tours across Rajasthan. The company has total sales of ₹25,00,000, variable costs of ₹12,50,000, fixed operating costs of ₹50,000, and has borrowed ₹12,50,000 at 8% interest.

Working through the numbers, the contribution would be ₹12,50,000 (Sales minus Variable Costs). Operating profit (EBIT) becomes ₹12,00,000 after deducting fixed costs. Interest on debt comes to ₹1,00,000, leaving an EBT of ₹11,00,000.

Now applying the formulas: the operating leverage would be Contribution divided by EBIT (₹12,50,000 ÷ ₹12,00,000 = 1.04). The financial leverage would be EBIT divided by EBT (₹12,00,000 ÷ ₹11,00,000 = 1.09). Multiplying these gives a combined leverage of approximately 1.13.

This tells the manager that for every 1% change in sales, the company’s EPS will change by roughly 1.13%. Not a dramatic multiplier, but a clear sign of relatively low risk.

Why a high combined leverage cuts both ways 🔗

Here’s where things get interesting. Combined leverage represents a company’s total risk related to operating leverage, financial leverage, and the net effect on EPS. When a company has both high operating leverage and high financial leverage, it sits in a zone of extreme volatility.

Consider what happens with a DCL of 4. A 10% increase in sales would lead to a 40% increase in EPS, while a 10% decrease in sales would cause EPS to fall by the same 40%. That is the classic double-edged sword. During boom periods, shareholders feel like geniuses. During downturns, the same shareholders watch their returns evaporate at four times the speed of the sales decline.

This is precisely why heavy industry companies that already carry massive fixed operating costs are usually advised against taking on too much debt. Stacking high financial leverage on top of high operating leverage can be financially fatal if revenues stumble even slightly.

How combined leverage shapes capital structure decisions 🔗

The real value of combined leverage analysis lies in helping companies design their risk profile deliberately rather than by accident. By monitoring changes in DCL over time, companies can assess the impact of financial decisions on overall profitability and sustainability. The Degree of Combined Leverage essentially becomes a balancing tool.

The trade-off principle 🔗

If a business naturally has high operating leverage (say, a chain of resorts with massive infrastructure costs), the prudent move is usually to keep financial leverage low. By relying more on equity than debt, the company avoids piling fixed financial obligations on top of already heavy fixed operating costs.

Conversely, a service-oriented business with mostly variable costs (like a small tour-booking agency) has low operating leverage. Such a company can afford to take on more debt because its operating profits don’t swing dramatically with sales. The interest payments become manageable even during slower seasons.

Sensitivity to economic cycles 🔗

Combined leverage also influences how a company weathers economic cycles. A high DCL firm tends to outperform competitors during expansion phases when sales rise rapidly. But when recession hits, the same firm becomes vulnerable to insolvency because both fixed operating costs and interest payments still need to be paid, regardless of revenue.

This is why a high DCL ratio means the company is more vulnerable to a decrease in sales because a large proportion of total costs are fixed. Smart finance managers track this number not just to celebrate during good times but to prepare contingency plans for difficult ones.

Combined leverage and return on equity 🔗

One often-overlooked benefit of analysing combined leverage is the insight it provides into return on equity. When a company successfully manages high combined leverage during a growth phase, the returns generated for shareholders can be exceptional. The fixed costs absorb the initial revenue, but every rupee earned beyond that point flows almost untouched to the bottom line.

This phenomenon, sometimes called “trading on equity,” works wonderfully when sales are growing steadily. Shareholders earn returns that far exceed what they would receive in a debt-free, low-fixed-cost business. The challenge is that the same mechanism reverses ferociously when sales decline, which is why combined leverage analysis must always include downside scenarios alongside the optimistic ones.

Strategic implications for managers 🔗

For finance managers, combined leverage is more than just a ratio. It is a planning tool that connects three crucial decisions: how much fixed infrastructure to invest in, how much debt to raise, and how aggressive to be with growth targets. Understanding the interplay between these decisions allows companies to deliberately position themselves on the risk-reward spectrum.

A startup might intentionally adopt a high combined leverage strategy, betting on rapid sales growth to multiply EPS quickly. An established conglomerate, on the other hand, might prefer a low DCL to ensure earnings stability across business cycles. Neither approach is universally right or wrong; the choice depends on industry dynamics, growth ambitions, and the management team’s appetite for volatility.

What matters most is that the choice is conscious. Companies that drift into high combined leverage without realising it often end up with painful surprises during downturns. Those that understand and actively manage their DCL turn it into a strategic advantage.

What do you think? If you were running a tourism business with seasonal revenue patterns, would you opt for a high combined leverage to maximize returns during peak seasons, or play it safe with a low DCL to survive the lean months? How would your answer change if you were managing a stable, year-round service business instead?

References

1. https://corporatefinanceinstitute.com/resources/accounting/degree-of-total-leverage/
2. https://www.freshbooks.com/glossary/financial/degree-of-operating-leverage
3. https://www.readyratios.com/reference/analysis/degree_of_combined_leverage_dcl.html
4. https://www.studocu.com/en-us/messages/question/5846210/how-is-the-degree-of-combined-leverage-dcl-calculated-what-does-it-measure
5. https://www.financestrategists.com/accounting/financial-statements/leverage/combined-leverage/
6. https://fastercapital.com/content/Degree-of-combined-leverage–How-to-Measure-Your-Total-Risk.html
7. https://www.supermoney.com/encyclopedia/degree-of-combined-leverage
8. https://financialmanagementpro.com/degree-of-combined-leverage/