Weighted Average Cost of Capital meaning

In legal practice, the Weighted Average Cost of Capital (WACC) is the discount rate used to convert future cash flows into present value when valuing companies or projects. It represents the blended return required by capital providers and combines the cost of equity, the after-tax cost of debt and, where relevant, the cost of preference shares, weighted by their market value in the capital structure. The cost of equity is commonly estimated using CAPM (risk-free rate, equity risk premium and beta). The cost of debt reflects prevailing interest rates, credit spreads and the tax deductibility of interest. Lawyers encounter WACC in mergers and acquisitions, private equity, schemes of arrangement, fairness and solvency opinions, restructuring valuations, expert evidence on damages and shareholder disputes, and in regulatory price controls and competition cases. WACC is not defined in legislation or case law; it is a corporate finance concept applied across legal contexts. Usage is broadly consistent across England & Wales, Scotland, Northern Ireland and Ireland, though sector regulators (for example, Ofgem, Ofwat and Ofcom; in Ireland, CRU and ComReg) periodically determine sector-specific WACC parameters. Key practical points: match post-tax or pre-tax WACC to the cash flows discounted, use market-value weights, and document assumptions, as inputs...