WACC Calculator

Q: What is the difference between WACC and the cost of equity?

Equity cost Re is the required return assigned to equity alone. WACC weights it with debt cost after the selected tax-shield assumption and preferred cost; with 100% equity and no other financing, WACC equals Re.

Q: How often should I recalculate WACC?

Recalculate when the inputs or valuation purpose change. Record the source and as-of date for your assumptions; an empty date is shown as not supplied. Sector presets are editable hypothetical vectors, not current estimates. The calculator does not retrieve or refresh market data.

Compute your company's Weighted Average Cost of Capital using CAPM-based cost of equity, after-tax cost of debt, and capital structure weights.

Capital Inputs

Capital basis Interest tax shield

Capital currency / unit

Assumptions as of

Source / cost assumptions

Currency labels the entered values; no foreign-exchange conversion is performed. An empty date means no date was supplied.

Hypothetical sector scenarios

Editable hypothetical inputs, not current industry estimates. Review every assumption before use.

Cost of Equity (R_e)

Cost of Equity

Return required by equity shareholders.

Market Value of Equity (E)

Market capitalisation.

Cost of Equity Helper

R_e = R_f + beta x (ERP + CRP) + SP

Risk-Free Rate

Match the risk-free rate to the cash-flow currency and horizon.

Beta (beta)

Systematic market exposure, not total volatility. Zero and negative beta are supported.

Equity Risk Premium

Enter an expected market premium consistent with the currency and horizon.

Computed R_e

Size Premium (SP)

Optional scenario adjustment; 0% omits it.

Country Risk Premium (CRP)

Optional country-risk scenario premium, multiplied by beta in this model.

R_e = D₁/P₀ + g

Expected Dividend (D₁)

Next 12-month dividend per share.

Stock Price (P₀)

Current market price per share.

Growth Rate (g)

Long-term sustainable growth rate.

Computed R_e

Cost of Debt (R_d)

Pre-Tax Cost of Debt

Yield on company bonds or bank loan rate.

Market Value of Debt (D)

Total interest-bearing debt at market value.

Capital Structure

Corporate Tax Rate (T_c)

Enter a scenario marginal tax rate. The selected shield assumption determines whether it is applied.

Preferred Stock (Optional)

Market Value of Preferred (P)

Total preferred equity at market value.

Cost of Preferred (R_p)

Annual dividend / preferred share price.

Preferred dividends are not tax-deductible - no interest tax shield applies.

WACC Result

Weighted Average Cost of Capital

Enter your capital structure inputs to calculate WACC.

WACC = (E/V x R_e) + (D/V x R_d x (1 - T_c)) +(P/V × R_p) | -

Equity Weight (W_e)

Debt Weight (W_d)

Pref. Weight (W_p)

Equity Component

After-Tax Cost of Debt

Debt Component

Pref. Component

Total Capital (V)

Capital Structure & WACC Components

Visual breakdown of how equity and debt contribute to your cost of capital.

Hurdle Rate Implications

Calculate WACC to see hurdle rate analysis.

Sensitivity Matrix - WACC by Cost of Equity x Equity Weight

Each cell shows WACC (%). Gold border = your current inputs. Green = low cost of capital. Red = high cost of capital.

Calculate WACC on the Calculator tab to populate the sensitivity matrix.

Compare a market-value structure

Keep the currency and annual rate basis consistent. The alternative is an independent assumption set, not a recommended financing mix.

Include alternative B

Remember inputs on this device

4 min read 4 steps 8 terms 2 examples 7 FAQs WACC = (E/V)Re + (D/V)Rd(1−Tc) + (P/V)Rp; V=E+D+P

Market mode uses V=E+D+P.

YMYL Reviewed by Calculover Editorial Review · Updated 2026-06-01 · 2 sources

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Walk-through

How to Use This Calculator

4 steps

Enter the Cost of Equity (Re)

The helper uses Re=Rf+β(ERP+CRP)+SP: country premium is beta-scaled and size premium additive. Its rates need a consistent currency/horizon; beta is systematic exposure, not total volatility.

Enter the Pre-Tax Cost of Debt (Rd)

Enter the pre-tax annual debt cost. Select whether the entered interest deduction is usable; do not enter an already reduced debt cost and then apply the deduction again.

Choose Capital Basis and Assumptions

Enter market equity, debt and optional preferred, or explicit weights totaling exactly 100%. Select the shield assumption and common currency/unit; add your source and as-of date if known.

Interpret Your WACC

Compare matching-risk project cash flows with an appropriate discount rate and assess NPV. An IRR above WACC alone is not a universal decision rule; cash-flow patterns, scale and timing matter.

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Reference

Formula & Methodology

3 formulas

Weighted Average Cost of Capital

WACC = (E/V)Re + (D/V)Rd(1−Tc) + (P/V)Rp; V=E+D+P

Cost of Equity via CAPM

Re = Rf + β(ERP+CRP) + SP

The helper uses Re=Rf+β(ERP+CRP)+SP: country premium is beta-scaled and size premium additive. Its rates need a consistent currency/horizon; beta is systematic exposure, not total volatility.

After-Tax Cost of Debt

After-Tax Rd = Rd × (1 − Tc)

The usable-shield assumption applies Rd×(1−Tc); choosing no usable deduction applies Rd without a reduction. Zero debt has no shield. Deductibility limits and future tax capacity are not modeled.

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YMYL

Trust, Methodology & Sources

Reviewed by Calculover Editorial Review · Updated 2026-06-01 · 2 sources

Editorial accountability

Author: Quinn Sumner - Editor

Owner: Quinn Sumner - Editorial owner

Reviewer: Calculover Editorial Review - Source and limitation review

Last reviewed: 2026-06-01

Last verified: 2026-06-01

Data effective: 2026-06-01

Methodology

Market mode uses V=E+D+P. Explicit-weight mode requires weights totaling exactly 100% and does not invent market capital. Annual costs enter once; the bridge separates gross debt cost from the negative usable interest tax shield. Preferred has no modeled deduction. The helper uses Re=Rf+β(ERP+CRP)+SP: country premium is beta-scaled and size premium additive. Its rates need a consistent currency/horizon; beta is systematic exposure, not total volatility. Leverage sensitivity holds component costs and preferred weight fixed. It is arithmetic sensitivity, not an optimal capital-structure recommendation.

Assumption: The calculator does not independently verify market values or explicit weights. Currency is a common unit label, not a conversion; as-of dates and source notes are user supplied.

Assumption: The helper uses Re=Rf+β(ERP+CRP)+SP: country premium is beta-scaled and size premium additive. Its rates need a consistent currency/horizon; beta is systematic exposure, not total volatility.

Assumption: The selected usable-shield assumption applies the entered marginal tax rate to interest cost. No usable deduction applies a zero shield. Actual deduction limits, taxable income and tax timing are outside the model.

Assumption: Leverage sensitivity holds component costs and preferred weight fixed. It is arithmetic sensitivity, not an optimal capital-structure recommendation.

Limitations & guidance

WACC Calculator produces a point-in-time estimate based on the inputs provided. It does not project future changes in capital structure, interest rates, or market beta.

The calculator does not validate whether the entered beta, risk-free rate, or equity risk premium are appropriate for the specific company or industry.

WACC is a simplified model that does not capture options embedded in capital structure, multi-currency debt, off-balance-sheet obligations, or minority interests.

Presets are editable hypothetical scenarios with no verified market observation date. Share opens a review before copying; Remember is optional. Stored historical inputs are read without rewriting their original bytes.

Professional guidance: WACC Calculator is for educational and analytical purposes only and does not constitute investment, tax, accounting, or legal advice. Capital structure decisions carry significant financial and legal implications. Consult a Chartered Financial Analyst (CFA), Certified Financial Planner (CFP), or qualified corporate finance professional before making capital allocation or investment decisions.

Primary sources

WACC — Corporate Finance Institute - Corporate Finance Institute

Equity Risk Premiums — Damodaran Online - Damodaran Online, NYU Stern

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Glossary

Key Terms Explained

8 terms

WACC Weighted Average Cost of Capital — the blended rate a company must earn across all its assets to satisfy all capital providers (equity and debt holders). Used as the discount rate in DCF analysis and the hurdle rate for capital budgeting decisions.

Cost of Equity (Re) The return demanded by equity shareholders for bearing the risk of owning the stock. Unlike debt, equity has no contractual rate — it is estimated using CAPM or dividend discount models.

Cost of Debt (Rd) The pre-tax rate a company pays on its interest-bearing borrowings. For publicly traded bonds, this is the yield to maturity; for bank debt, it is the stated interest rate.

CAPM Capital Asset Pricing Model — a framework for estimating the required return on an equity investment: Re = Rf + β × (Rm − Rf). CAPM says that investors require compensation for the time value of money (risk-free rate) plus a premium for systematic (market) risk.

Beta (β) Beta is a regression exposure to systematic market risk, not total volatility or an exact path. Zero and negative beta are valid. Match the benchmark, source period, currency and rate basis.

Equity Risk Premium (ERP) Assumed annual equity-market premium above a matching risk-free rate; ERP is beta-scaled in the helper, and no verified current estimate is supplied.

Interest Tax Shield Modeled interest-cost reduction Wd×Rd×Tc when usable is selected; zero debt or no usable deduction gives zero shield, and preferred dividends are excluded.

Hurdle Rate Compare matching-risk project cash flows with an appropriate discount rate and assess NPV. An IRR above WACC alone is not a universal decision rule; cash-flow patterns, scale and timing matter.

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Scenarios

Real-World Examples

2 worked examples

Sarah

Growth-Stage SaaS Company

Cost of Equity (Re) 14.0% Pre-Tax Cost of Debt (Rd) 7.0% Market Value of Equity $800,000,000 Market Value of Debt $200,000,000 Tax Rate 21%

Equity contributes 11.2points; debt contributes 1.106points after tax. WACC=12.306%. This modeled rate applies to matching-risk cash flows; it does not guarantee that a project with higher IRR creates value.

Marcus

Mature Manufacturing Business

Cost of Equity (Re) 9.5% Pre-Tax Cost of Debt (Rd) 4.5% Market Value of Equity $500,000,000 Market Value of Debt $500,000,000 Tax Rate 25%

WACC=4.75+1.6875=6.4375%. The debt tax shield is 0.5625percentage points versus the same mix without deduction. The total difference from all-equity 9.5% is 3.0625points, not the tax shield alone.

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Reference

Cite This Calculator

APA & MLA

Use either format to cite this calculator in a paper, report, or resource list.

APA

MLA

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Deep Dive

WACC: The Universal Yardstick for Corporate Value Creation

4 chapters · 4 min read

Market mode uses V=E+D+P. Explicit-weight mode requires weights totaling exactly 100% and does not invent market capital. Annual costs enter once; the bridge separates gross debt cost from the negative usable interest tax shield. Preferred has no modeled deduction. Compare matching-risk project cash flows with an appropriate discount rate and assess NPV. An IRR above WACC alone is not a universal decision rule; cash-flow patterns, scale and timing matter.

What WACC Actually Measures

Compare matching-risk project cash flows with an appropriate discount rate and assess NPV. An IRR above WACC alone is not a universal decision rule; cash-flow patterns, scale and timing matter.

How to Estimate the Cost of Equity with CAPM

The helper uses Re=Rf+β(ERP+CRP)+SP: country premium is beta-scaled and size premium additive. Its rates need a consistent currency/horizon; beta is systematic exposure, not total volatility.

Beta is a regression exposure to systematic market risk, not total volatility or an exact path. Zero and negative beta are valid. Match the benchmark, source period, currency and rate basis.

Interest Tax Shield and Leverage Sensitivity

Leverage sensitivity holds component costs and preferred weight fixed. It is arithmetic sensitivity, not an optimal capital-structure recommendation.

The usable-shield assumption applies Rd×(1−Tc); choosing no usable deduction applies Rd without a reduction. Zero debt has no shield. Deductibility limits and future tax capacity are not modeled.

Common WACC Mistakes to Avoid

Four mistakes account for most WACC errors in practice. First, using book values instead of market values for the capital structure weights — book equity bears no resemblance to current market capitalisation. Always use market values. Second, mixing nominal and real rates: if your free cash flows are in nominal terms, WACC must also be nominal. Third, ignoring the time-varying nature of capital structure: a company that plans to deleverage over five years should not hold the debt weight constant across the forecast period. Fourth, using a single WACC for a diversified conglomerate: each business unit should be assessed against a WACC calibrated to its own risk profile — using the conglomerate's blended WACC to evaluate a high-risk venture will accept projects that destroy value in that segment.

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Questions

Frequently Asked Questions

7 questions

Does the leverage curve identify an optimal capital structure?+

Leverage sensitivity holds component costs and preferred weight fixed. It is arithmetic sensitivity, not an optimal capital-structure recommendation.

Should I use book value or market value for capital structure weights?+

Market mode uses the entered market values to calculate weights. Explicit-weight mode uses your weights directly and requires exactly 100%; it cannot establish their source or an underlying market valuation. Keep capital definitions and valuation dates consistent. Neither mode verifies quotes or chooses an appropriate financing mix.

Can WACC be negative?+

Within the displayed ranges, component costs and capital must be nonnegative, tax 0–100%, and total capital positive. Zero WACC is valid. Negative component costs are rejected, not silently clamped.

How does WACC relate to EVA (Economic Value Added)?+

EVA = (ROIC − WACC) × Invested Capital, where ROIC is the return on invested capital. When ROIC > WACC, the business generates positive EVA and creates value above its cost of capital. When ROIC < WACC, the business destroys value even if it shows positive accounting profit. WACC is the denominator that determines whether the value-creation spread is positive or negative.

What is the difference between WACC and the cost of equity?+

Equity cost Re is the required return assigned to equity alone. WACC weights it with debt cost after the selected tax-shield assumption and preferred cost; with 100% equity and no other financing, WACC equals Re.

How often should I recalculate WACC?+

Recalculate when the inputs or valuation purpose change. Record the source and as-of date for your assumptions; an empty date is shown as not supplied. Sector presets are editable hypothetical vectors, not current estimates. The calculator does not retrieve or refresh market data.

Is a higher or lower WACC better?+

Leverage sensitivity holds component costs and preferred weight fixed. It is arithmetic sensitivity, not an optimal capital-structure recommendation. Compare matching-risk project cash flows with an appropriate discount rate and assess NPV.

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WACC Calculator

Compare a market-value structure

Review the link before copying

How to Use This Calculator

Enter the Cost of Equity (Re)

Enter the Pre-Tax Cost of Debt (Rd)

Choose Capital Basis and Assumptions

Interpret Your WACC

Formula & Methodology

Trust, Methodology & Sources

Key Terms Explained

Real-World Examples

Sarah

Marcus

Cite This Calculator

WACC: The Universal Yardstick for Corporate Value Creation

What WACC Actually Measures

How to Estimate the Cost of Equity with CAPM

Interest Tax Shield and Leverage Sensitivity

Common WACC Mistakes to Avoid

Frequently Asked Questions

Get a branded PDF of your results

WACC Calculator

Compare a market-value structure

Review the link before copying

How to Use This Calculator

Enter the Cost of Equity (Re)

Enter the Pre-Tax Cost of Debt (Rd)

Choose Capital Basis and Assumptions

Interpret Your WACC

Formula & Methodology

Trust, Methodology & Sources

Key Terms Explained

Real-World Examples

Cite This Calculator

WACC: The Universal Yardstick for Corporate Value Creation

What WACC Actually Measures

How to Estimate the Cost of Equity with CAPM

Interest Tax Shield and Leverage Sensitivity

Common WACC Mistakes to Avoid

Frequently Asked Questions

Get a branded PDF of your results

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