Combined Leverage: Maximizing Firm Value

A 10% rise in sales sounds simple until you notice that it can push a company’s earnings per share up by 20%, 30%, or even more. The same multiplier works in reverse when sales fall. This amplification effect isn’t magic – it’s combined leverage at work, and understanding it is central to how firms manage risk while chasing higher returns for shareholders.

What is combined leverage 🔗

Every firm faces two layers of risk. The first comes from its cost structure – how much of its total cost is fixed versus variable. The second comes from its capital structure – how much debt it carries versus equity. Operating leverage captures the first kind of risk, and financial leverage captures the second. When you multiply the two together, you get combined leverage (also called composite or total leverage), which shows the full impact of both fixed operating costs and fixed financial costs on earnings per share (EPS).

The Institute of Chartered Accountants of India defines leverage as the influence one financial variable has over another – sales, EBIT, and EPS being the three variables that matter most here. Combined leverage essentially traces the full chain: how a change in sales travels through EBIT and lands as a change in EPS.

How operating leverage sets the stage 🔗

Operating leverage arises because a firm has fixed operating costs – rent, salaries, depreciation – that don’t move with sales volume. When sales rise, these fixed costs stay flat, so a larger share of every extra rupee of sales flows straight into operating profit (EBIT). This is why a firm with higher fixed costs shows a higher degree of operating leverage, and correspondingly higher operating risk.

Degree of operating leverage (DOL) 🔗

DOL is measured as:

DOL = Contribution ÷ EBIT

A DOL of 2 means a 10% rise in sales produces roughly a 20% rise in EBIT. The flip side matters just as much – the same firm sees EBIT fall twice as fast when sales dip. Retail chains, airlines, and manufacturers with heavy plant investment typically carry high DOL, while service firms with mostly variable costs sit at the low end.

How financial leverage takes over 🔗

Once EBIT is determined, the story shifts to how the firm is financed. If a company has borrowed money, it owes fixed interest payments regardless of how EBIT behaves. This fixed financial cost creates financial leverage, which measures how a change in EBIT translates into a change in EPS.

Degree of financial leverage (DFL) 🔗

DFL is calculated as:

DFL = EBIT ÷ EBT (Earnings Before Tax)

A firm with no debt has a DFL of 1 – EBIT changes pass through to EPS one-for-one. Add debt, and interest obligations mean the EPS swings become sharper. This is often called a “double-edged sword”: financial leverage can accelerate growth when returns exceed borrowing costs, but it can just as easily deepen losses when they don’t.

Putting it together: degree of combined leverage 🔗

Combined leverage links the two effects into a single measure of total risk:

DCL = DOL × DFL = Contribution ÷ EBT

This tells you the percentage change in EPS for every 1% change in sales, folding in both operating and financing decisions at once.

A worked example 🔗

Consider a mid-sized company with sales of ₹50,00,000, a variable cost ratio of 60%, fixed operating costs of ₹8,00,000, and ₹40,00,000 of debt carrying 10% interest. It has 2,00,000 equity shares outstanding and falls in the 30% tax bracket.

DOL = 20,00,000 ÷ 12,00,000 = 1.67
DFL = 12,00,000 ÷ 8,00,000 = 1.5
DCL = 1.67 × 1.5 = 2.5

This means a 10% rise in sales should lift EPS by roughly 25%. Running the numbers confirms it: EPS moves from ₹2.80 to ₹3.50 on a 10% sales increase – a 25% jump, exactly as DCL predicted. Had sales fallen 10% instead, EPS would have dropped by the same 25%, showing why combined leverage cuts both ways.

Why combined leverage matters for firm value 🔗

Finance managers don’t chase leverage for its own sake – they use it to think about the trade-off between risk and return. High combined leverage means shareholders enjoy magnified gains when business is strong, but they also absorb magnified losses when it isn’t. This directly affects how volatile a stock’s earnings look to investors, which in turn affects the price they’re willing to pay for it.

A firm aiming to maximise value has to balance the two leverages rather than maximise both. A very high degree of both operating and financial leverage makes a firm’s position extremely risky, since fixed operating costs and fixed interest charges combine to create wide swings in shareholder earnings. The general guidance is that a firm with high operating leverage should keep financial leverage moderate, and vice versa, so that total risk stays within a range investors and lenders are comfortable with.

The four combinations of risk 🔗

A real-world lesson 🔗

Textbook formulas become sharper once you see them play out in an actual company. Suzlon Energy’s growth story in the mid-2000s is a well-known example of leverage’s double-edged nature – the wind energy major expanded aggressively on borrowed funds, and leverage worked in its favour as long as revenues kept climbing. But because interest costs don’t shrink when profits do, the same borrowing that boosted returns during the boom turned into a heavy burden once growth slowed, hitting shareholder earnings far harder than the dip in revenue alone would suggest. That is combined leverage showing up in real financial statements rather than a textbook table.

Using combined leverage in decision-making 🔗

For a finance student or a working manager, combined leverage is useful in a few concrete ways:

• Capital budgeting: Estimating how a new plant or product line’s fixed costs will interact with existing debt before committing.
• Financing choices: Deciding whether to fund expansion with debt or equity, based on how much operating risk the business already carries.
• Forecasting EPS: Projecting how sensitive earnings will be to expected changes in sales, which matters for both management and investors.
• Risk communication: Explaining to lenders and shareholders why earnings may swing more than revenue does.

None of this means high leverage is inherently bad. Used with a clear-eyed view of the underlying business risk, both operating and financial leverage can be powerful tools to grow shareholder value faster than a purely equity-funded, low-fixed-cost firm ever could. The danger lies in stacking high operating leverage on top of high financial leverage without a buffer for a downturn.

What do you think? If you were advising a company that already has high fixed operating costs, would you recommend they take on more debt to fund expansion, or hold back on financial leverage until sales stabilise? And looking at a business you know well, does its cost and capital structure suggest a high or low degree of combined leverage?

References

1. https://resource.cdn.icai.org/87742bos-28082025-ch6.pdf
2. https://www.lkouniv.ac.in/site/writereaddata/siteContent/202003291621086664vasudha_Leverage_Analyis.pdf
3. https://www.venturasecurities.com/blog/understanding-financial-leverage/
4. https://anucde.info/materialpdf/L-8.pdf
5. https://www.valueresearchonline.com/stories/227289/why-leverage-more-dangerous-than-investors-think/