What is the difference between accounting profit and economic profit? Accounting profit can be calculated by NOPAT - [WACC X (Costly Capital)], while economic profit is simply NI. Accounting profit accounts for interest expense while economic profit accounts for interest expense and opportunity cost. Accounting profit emphasizes cost of debt and equity while economic profit focuses on cost of debt. Accounting profit is synonymous with NI, while economic profit represents EPS. What is Free Cash Flow to the Firm (FCFF) primarily used for? Estimating cash flow available to shareholders only. Estimating cash flow available to invest in firm-specific projects. Estimating cash flow available to creditors and shareholders. Estimating cash flow available to the firm's finance org.