The EVA formula
EVA = NOPAT − (invested capital × WACC). NOPAT is after-tax operating income; WACC is the weighted average cost of capital. Equivalently, EVA = (ROIC − WACC) × invested capital, where ROIC = NOPAT ÷ invested capital.
Use consistent definitions and periods. Annual results require an annual rate and a compatible capital base. Document accounting adjustments so comparisons remain meaningful.
What each indicator represents
Check what each input means before calculating. These definitions describe the general approach; tax treatment and adjustments must fit the case being assessed.
- NOPAT: after-tax operating income, separate from financing effects.
- Invested capital: resources employed in operations under the model’s adjustments.
- ROIC: operating return relative to capital employed.
- WACC: a rate reflecting financing costs and the risk assumed in the valuation.
Worked example and interpretation
In a hypothetical annual example, invested capital is BRL 500,000 and NOPAT is BRL 75,000. ROIC is 15%. With WACC of 10%, the capital charge is BRL 50,000 and EVA is BRL 25,000.
If NOPAT falls to BRL 40,000 with unchanged capital and WACC, EVA becomes negative BRL 10,000. Operating income remains positive, but does not cover the capital charge in this example.
- Invested capital
- BRL 500,000
- Base-case NOPAT
- BRL 75,000
- Base-case ROIC
- 15% per year
- WACC
- 10% per year
- Base-case EVA
- BRL 25,000
- EVA with BRL 40,000 NOPAT
- −BRL 10,000
Period EVA and company value
EVA measures performance for a period. In an economic profit valuation, operating value combines invested capital with the present value of future EVA under consistent assumptions.
Simply multiplying current EVA by a number of years is insufficient. Projections must account for business evolution, reinvestment, cost of capital and assumptions about continuing operations.
Monitoring value creation
When comparing periods, investigate operating income and capital employed separately. Better margins may coincide with rising inventory or receivables, requiring a combined interpretation.
In Valueva, valuation and monthly value-based management support this analysis. Goals and actions record initiatives, owners and deadlines. Use history to support discussion while checking data consistency and tax treatment in each analysis.
Interpretation mistakes to avoid
Positive EVA does not remove risk or guarantee future value creation. A single metric also does not describe liquidity, customer concentration or governance quality.
- Mixing annual rates with monthly results.
- Comparing periods with different capital bases or accounting criteria without explaining adjustments.
- Treating revenue, net income and NOPAT as equivalent.
- Using a cost of capital without explaining its source and relevance to the business.
Sources and references
References for the concepts discussed. Examples are educational and do not represent customer results.