Return on capital and the cost gap

Two businesses can report identical operating profit while creating different value. One may require plants and heavy inventory; the other may earn the same profit with less capital. Connect after-tax operating profit to the capital committed to the operation. Return on invested capital, ROIC, is NOPAT divided by average operating invested capital over the period, after a clear definition of that capital. In a simplified model it is net operating assets: operating assets less non-interest-bearing operating liabilities. Exclude surplus cash that is not needed for operations, and avoid counting debt twice in the denominator. Use an average balance when capital changes materially within the year, and disclose any estimate of opening or closing capital.

The calculation does not end with ROIC. Cost of capital is the analytical hurdle for compensating funders for time and risk in the relevant cash flows. If using weighted average cost of capital, WACC, compare it with cash flows before payments to capital providers and keep nominal or real assumptions consistent. Do not borrow another company's rate merely because its business label looks similar; risk, leverage and currency matter. This lesson assumes 10% for instruction, not as a market rate. The return spread is ROIC less cost of capital. A positive spread indicates that adjusted accounting return exceeds the hurdle; a negative spread warns that reinvesting to grow may destroy value even while profit rises. The spread diagnoses performance. It does not replace dated project cash flows or account for all valuation adjustments.

Economic profit turns the spread into an analytical amount: NOPAT − (cost of capital × invested capital). The second term is a capital charge, not a literal invoice paid at year-end. It makes the opportunity cost of assets visible to managers. But the result depends on definitions and book values. Writing down an asset can mechanically raise ROIC by reducing the denominator without improving operations. Compare trends and reconcile the measure to cash flows and new investment. Positive economic profit on the current asset base is also no guarantee that the next project adds value. An established plant may be profitable while an expansion fails its hurdle.

A fictional group has two divisions this year. Division A has NOPAT of 24 and average operating invested capital of 160. Division B has NOPAT of 18 and capital of 90. Assuming the same suitable 10% cost of capital for both in this teaching example, A's ROIC is 24÷160 = 15% and economic profit is 24−16 = 8. B's ROIC is 18÷90 = 20% and economic profit is 18−9 = 9. A earns more absolute operating profit, but B delivers a higher return and more economic profit with less capital. It does not follow that every available unit of money belongs in B. The size and risk of incremental opportunities, shared assets and constraints on expansion determine the next allocation.

A proposes an automation project costing 50 that would add a sustainable 4 of annual NOPAT once established. Its approximate incremental return is 4÷50 = 8%, below the 10% hurdle. The extra capital charge is 5, giving incremental economic profit of −1 per stable year. If the project is simply added to the old figures, A's NOPAT becomes 28 and capital 210, so average ROIC is about 13.33%. That remains above 10% but is below the previous 15%. An approval based only on the division average would conceal the new project's value shortfall inside older high-return assets. To judge it fairly, build actual annual cash flows, life and terminal proceeds. Sustainable NOPAT alone omits when benefits start, changes in working capital and any disposal value.

By contrast, B can exit a dormant product line and release 12 of working capital while reducing forecast annual NOPAT by only 0.4. Before exit costs and supplier effects, capital becomes 78 and NOPAT 17.6. New ROIC is about 22.56%; economic profit is 17.6−7.8 = 9.8, an increase of 0.8 over the original 9. The difference can be checked directly: lose 0.4 of NOPAT but save a 1.2 capital charge, giving +0.8. Releasing 12 may be a one-time cash event; it is not 12 of recurring operating profit. Separation payments or lost complementary sales belong in a dated cash-flow analysis before this becomes a final recommendation.

Check measure quality before rewarding it

Ask how old the assets are and how they were measured. A largely depreciated old plant has a small book denominator, which can make its manager look better than the manager who commissioned a newer plant with better future efficiency. A manager may also delay necessary maintenance to lift current NOPAT while damaging later cash flows. Display ROIC beside free-cash-flow growth, reinvestment and service-quality measures. Acquisitions introduce another issue: does invested capital include purchased goodwill and intangible assets? Comparing one division including them with another excluding them is misleading. Set a consistent definition, show the reconciliation and, if helpful, disclose both analytical views rather than selecting the denominator that produces the preferred ratio.

The cost of capital follows the risk of the cash flows, not the manager's seniority. If A runs a stable business while B enters a more uncertain market, the shared 10% assumption may be unsuitable. At illustrative costs of 9% for A and 14% for B, A's economic profit becomes 24−14.4 = 9.6, while B's is 18−12.6 = 5.4. Their ranking reverses. These rates are a sensitivity exercise, not observed market estimates. Do not arbitrarily raise a discount rate to punish a disfavored project. Separate risks already represented in cash-flow scenarios from risks represented in the discount rate, avoiding a double penalty. Show justified ranges and indicate which recommendation is robust and which depends on an uncertain input.

Solution: current ROIC is 12÷80 = 15%, and economic profit is 12−0.11×80 = 3.2. The new line adds a capital charge of 0.11×25 = 2.75 against incremental NOPAT of 2.5, reducing economic profit by 0.25 per year. Its approximate incremental return is 10%, below the 11% hurdle. Operational improvement changes invested capital by +4−6 = −2 and increases NOPAT by 0.2. Its economic-profit change is 0.2−0.11×(−2) = +0.42 per year. New invested capital is 78, NOPAT 12.2 and economic profit 12.2−8.58 = 3.62, confirming the 0.42 improvement. This supports investigating the operational improvement first. It does not prove its net present value: we still need the dates of the 4 outlay and 6 release, persistence of the 0.2 benefit, transition costs and possible service effects. The new line might have a later expansion option absent from this calculation; model and test that possibility rather than adding a verbal premium to the result.