NOPAT Calculator (Net Operating Profit After Tax)
Calculate Net Operating Profit After Tax from operating income and tax rate.
The cash earnings metric used in EVA, ROIC, and DCF valuation.
NOPAT = Operating Income × (1 - Tax Rate). It is the operating profit a company would have if it had no debt — interest is excluded. NOPAT measures pure operating performance, separating financing decisions from operating decisions.
Why it matters: Two companies with identical operations but different capital structures (one all-equity, one heavily leveraged) will have very different net income because of interest expense. NOPAT shows what each business actually earns from operations, comparable across capital structures.
The formula in detail:
NOPAT = EBIT × (1 - Tax Rate)
Where EBIT (Earnings Before Interest and Taxes) is operating income, and tax rate is the marginal or effective rate. Some practitioners use:
NOPAT = (Revenue - COGS - SG&A - D&A) × (1 - Tax Rate)
Both produce the same result if EBIT is calculated correctly.
The “tax shield” question. Real-world taxes on EBIT are not what shows up on the income statement. Income tax expense is calculated on EBT (after interest deduction), so net income includes the tax benefit of interest. NOPAT undoes that benefit by applying the tax rate to EBIT instead.
NOPAT > Net Income for a company with debt (because actual taxes were lower thanks to the interest deduction).
Three big uses for NOPAT.
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EVA (Economic Value Added). EVA = NOPAT - (WACC × Invested Capital). A company creates economic value if NOPAT exceeds its capital charge. Stern Stewart popularized this in the 1990s as a better profitability metric than net income.
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ROIC (Return on Invested Capital). ROIC = NOPAT / Invested Capital. The clean measure of how much operating cash a company generates per dollar of capital deployed. ROIC > WACC means the company is creating value.
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DCF valuation. Free Cash Flow to Firm = NOPAT + D&A - Capex - ΔWorking Capital. The “to firm” version is unlevered, which is why NOPAT (also unlevered) is the right starting point.
Tax rate selection in practice.
- Marginal rate (US: 21% federal + state ~5% = 25-27%) for green-field projects and value creation analysis.
- Effective rate (actual tax / EBT from the income statement) for historical NOPAT and ROIC calculations.
- Cash tax rate (taxes paid in cash / EBT) for free cash flow modeling.
The differences can be significant — a company with deferred tax liabilities may have a 21% statutory rate, 18% effective rate, and 12% cash tax rate.
Worked example.
- Revenue: $500M
- Operating expenses: $400M
- Operating Income (EBIT): $100M
- Effective tax rate: 25%
NOPAT = 100 × (1 - 0.25) = $75M
If the company has $500M of invested capital (debt + equity), ROIC = 75 / 500 = 15%. If WACC is 10%, EVA = 75 - (10% × 500) = $25M of economic value created.
A common analyst trap. People sometimes calculate NOPAT for a money-losing company and flip the sign on the tax adjustment. If EBIT is negative, applying (1 - 25%) does NOT account for actual tax behavior — there may be a tax benefit (NOL) or no tax effect at all. For loss-making companies, NOPAT should equal EBIT (no tax adjustment) unless the loss is generating realizable tax credits.