ROIC and WACC

A company creates shareholder value if and only if its return on invested capital (ROIC) exceeds its weighted average cost of capital (WACC). If ROIC > WACC, the company is earning more on capital than the cost of that capital. If ROIC < WACC, it’s destroying value.

The fundamental value-creation equation

WACC is the blended cost of all capital—the minimum return debt holders and equity holders require.

If a company has a cost of debt of 4% and a cost of equity of 10%, with a 50/50 debt-equity mix, its WACC is roughly 7% (the weighted average).

Now, if that company’s ROIC is 12%, it’s earning 5 percentage points above WACC. Every dollar of capital deployed earns 5 cents of economic profit. Sustained over decades, this creates enormous shareholder value.

If ROIC is 5%, the company is earning 2 points below WACC. Every dollar of capital destroys 2 cents of value. Reinvestment at such returns erodes the business.

Why the spread matters more than the absolute level

A company with 8% ROIC and 6% WACC is creating value (a 2-point spread). A company with 15% ROIC and 12% WACC is also creating value (a 3-point spread). The second is superior, but both are acceptable.

A mature, stable utility with 8% ROIC and 7% WACC is creating a thin but real value spread, appropriate for a utility. A software startup with 50% ROIC and 11% WACC is creating enormous economic profit—but only if it can sustain that ROIC as it scales.

Terminal value and the ROIC-WACC spread

Discounted cash flow valuations rely on the ROIC-WACC spread to estimate terminal value. If ROIC is expected to equal WACC in the terminal period (the “competitive long run” where the company earns a normal return), sustainable growth is capped near GDP growth. If ROIC is expected to exceed WACC, the company can grow faster and still create value.

A company with a strong competitive moat (a moat that sustains ROIC above WACC for decades) is worth much more than a company with a temporary advantage that ROIC will converge to WACC within 5 years.

How leverage affects the relationship

A company can be financed differently but still have the same ROIC. A company financed 100% with equity and one financed 50/50 might both earn 12% ROIC.

But their WACC differs. If the equity cost is 10% and debt cost is 4%:

All-equity company: WACC = 10%
50/50 company: WACC ≈ 7%

The all-equity company has a 2-point spread (12% ROIC − 10% WACC). The leveraged company has a 5-point spread (12% ROIC − 7% WACC). The leverage amplifies the spread, making the company appear to create more value.

This is the danger: leverage amplifies the ROIC-WACC spread when times are good, but it also amplifies the damage when ROIC falls below WACC. A 12% ROIC with 7% WACC and high leverage is attractive. A 5% ROIC with 7% WACC and high leverage is a disaster.

Identifying competitive moats

Companies with persistent ROIC far above WACC have competitive moats. The market is willing to pay a premium for their stock because the moats protect profitability.

Conversely, a company with ROIC near or below WACC is in a commodity business. Investors should expect the stock to trade near book value because there’s no durable competitive advantage.

Most of equity investing is attempting to identify companies where:

Current ROIC > WACC (value is being created now)
The gap is sustainable (moat exists)
The market hasn’t fully priced in the moat

Management’s capital allocation test

A simple test of management quality: are they deploying capital in projects where expected returns exceed WACC? If the company consistently invests in projects below WACC and destroys value through M&A, the answer is no. If management focuses capital on high-ROIC investments and divests low-ROIC assets, they’re creating value.

Some of the best value investors assess management partly by asking: “Can management reliably identify projects with ROIC > WACC?” The answer predicts future value creation.

ROIC, WACC, and growth

A company can grow very fast while destroying value if it invests in low-ROIC projects. Conversely, a company can grow slowly while creating enormous value by restricting growth to only the highest-ROIC opportunities.

The optimal growth rate is not the fastest growth rate. It’s the growth rate that maximizes the value created by reinvested earnings—which depends on ROIC and WACC.