The Importance of Incremental Return on Capital
Why the next dollar of capital matters more than the last
It is important to view a company’s management team as capital allocators and to judge their ability to deploy the company’s capital in the most productive and efficient ways. At the very least, they should be investing at a rate higher than the company’s WACC (Weighted Average Cost of Capital). This is their hurdle rate.
Many managers, however, are not good at this. In fact, a large portion of corporate executives are capital destroyers. They invest capital in projects that are negative returning or are unattractive at the margin, meaning they aren’t the highest options compared to the required return on capital of the shareholders.
A key measure to watch how management invests capital is Return on Invested Capital, or ROIC. Here is the formula:
NOPAT is another measure operating income if the company was unlevered (it had no debt). You can get there by taking EBIT (Earning Before Interest and Taxes) * (1-Tax Rate).
Invested Capital is the total capital supplied to the company by debt holders and equity shareholders (i.e. capital invested in the company).
Fundamentally, ROIC answers the question “How much in returns is the company earning per dollar of invested capital?” It is a question management of a company should ask themselves, frequently.
Crucially, the return on invested capital should be higher than the companies cost of capital, or WACC. WACC is the average rate a business pays to finance its assets, representing the minimum return required by lenders and shareholders.
If ROIC > WACC, value is being created. If the returns are is less than the cost of capital, value is being destroyed. This rule of thumb is one measure to determine if a company’s management is effective at capital allocation. It can be another way to determine if a company has a sustainable competitive advantage. However, the high return alone does not tell you that, whether the company is able to generate high returns on invested capital consistently over long periods of time tells you the company must have some form of a defensible moat, since consistent higher returns will drive others to try and get in on the action. If the company can continue to keep market share over new entrants, or new entrants can’t enter, the company has a formidable barrier.
These types of companies typically don’t need great management teams, since the business model is so strong, but they can’t have bad management teams that destroy value. At least, that’s how it should work. Unfortunately, there are a lot of great businesses out there with bad management teams.
This is where incremental return on invested capital becomes the more important measure.
While looking at historical ROIC, it can tell you about where the company has been, but doesn’t tell you where the company is going. In other words, historical ROIC tells you what a business has earned on the capital already deployed. Incremental ROIC, or ROIIC, tells you what the business is earning on each new dollar of capital it puts to work. The distinction matters, and the market frequently misses it.
A company can carry an impressive historical ROIC of 20% or 25% while quietly destroying value on every incremental investment it makes. This happens when management, flush with cash from a strong core business, reaches for growth in adjacent markets, makes acquisitions at inflated prices, or builds capacity into saturating demand. The headline ROIC looks fine for years. The damage only surfaces later, when those bets don’t pay off.
The best capital allocators understand this intuitively. They ask not just “what are we earning?” but “what will we earn on the next dollar we deploy and is that better than returning it to shareholders?” Companies that can consistently reinvest at high incremental returns are rare. When you find one, the compounding effect over a long holding period is extraordinary.
This is what makes a business worth owning forever (or until the company no longer has this advantage). The market tends to price current earnings and near-term growth. It frequently underestimates the duration of a company’s reinvestment runway at attractive incremental returns. That gap between market pricing and the true long-term compounding power of a high-ROIIC business is, in our view, one of the most consistent sources of alpha available to a patient, research-driven investor.
So when you evaluate a company and its management team, the ROIC history is the starting point. The harder question is what they will do with tomorrow’s capital. A strong business model earns you time, but it doesn’t make the capital allocation decisions for you. Hold management to the same standard you would any steward of your money: Are they deploying capital where it earns the most, or where it’s most convenient?
The best managers think like investors. They understand that saying no to a low-return project, even a strategically appealing one, is itself an act of value creation. They treat the hurdle rate as a real constraint, not a formality. And when reinvestment opportunities are scarce, they have the discipline to return capital to shareholders rather than empire-build.
These are not common traits. But when you find a management team that operates this way, sitting inside a business with durable competitive advantages and a long reinvestment runway, you have found something worth holding for a long time.
That is what incremental return on capital is really measuring. Not just a number on a page but the quality of the decision-making behind every dollar the business touches.
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