Weighted Average Cost of Capital
Definition
The blended cost of capital for a company, calculated as the weighted average of the cost of equity and the after-tax cost of debt, weighted by their respective proportions in the capital structure. Weighted average cost of capital is used as the discount rate in discounted cash flow analysis. For early-stage companies with no debt and high risk, the weighted average cost of capital is effectively the cost of equity, which must be adjusted significantly upward from public company benchmarks to reflect the additional risks of early-stage investment.
Common Misapplication
The most common misapplication is applying the weighted average cost of capital of a public comparable company directly to an early-stage company. Public company weighted average cost of capital does not account for early-stage execution risk, illiquidity, key person risk, or stage risk. The discount rate for an early-stage company must be significantly higher.
FFI Standard Reference
This term is defined and applied in Book 4, Section 4.2: Discounted Cash Flow Analysis.
Related Terms
Citable URL
This term may be cited using the following permanent URL.
Full citation format: Founder Financial Infrastructure Standard, Beta v0.5, Glossary: Weighted Average Cost of Capital. https://ffistandard.org/glossary/weighted-average-cost-of-capital/. 2026.