Финансы
Мгновенно, конфиденциально и бесплатно
Weighted Average Cost of Capital Calculator.
Calculate WACC from market-value financing components, costs, and tax assumptions.
Этот калькулятор пока переведён не полностью — часть текста отображается на английском.
Введите значения
Результаты обновляются во время ввода.
Results are estimates from the stated formula and inputs; verify assumptions before making financial decisions.
Cite this calculator
Canonical URL: https://mathify.one/ru/finance/cost-of-capital
Cite as: Mathify. (2026). Калькулятор: Weighted Average Cost of Capital. https://mathify.one/ru/finance/cost-of-capital
Use Cases
Investment Appraisal
Use WACC as the discount rate to evaluate the net present value (NPV) of projects or acquisitions, ensuring they meet the required return.
Example: A company with WACC of 10% can reject a project with an expected return of 8%.
Capital Structure Optimization
Assess how changes in debt, equity, or preferred financing affect overall cost of capital, helping to find the optimal mix.
Example: Increasing debt from 30% to 50% may lower WACC due to tax benefits, but also increases financial risk.
Frequently Asked Questions
- What is WACC and why is it important?
- WACC (Weighted Average Cost of Capital) is the average rate a company expects to pay to finance its assets, blending the cost of debt, equity, and preferred stock. It's used as a discount rate for investment decisions and valuation.
- How does the tax rate affect WACC?
- Interest on debt is tax-deductible, so the after-tax cost of debt is lower. A higher tax rate reduces the cost of debt, thereby lowering WACC, all else equal.
- What inputs are needed for this calculator?
- You need the market values of debt, equity, and preferred capital, their respective costs (cost of debt, cost of equity, cost of preferred), and the corporate tax rate.
Tips & Common Mistakes
Tips
- Use market values (not book values) for debt and equity to reflect true economic weights.
- Ensure the cost of debt is the current market rate, not the historical coupon rate.
- The cost of equity can be estimated using CAPM: risk-free rate + beta * market risk premium.
- Double-check that the tax rate is the marginal corporate tax rate, not the effective rate.
Common Mistakes to Avoid
- Using book values instead of market values for capital weights.
- Forgetting to adjust the cost of debt for taxes (multiply by 1 - tax rate).
- Including short-term debt or other non-interest-bearing liabilities in the debt figure.
Last updated: August 13, 2026