Residual Income Model
The Residual Income Model (RIM) values a stock as its current book value plus the present value of all future excess returns over the cost of equity — capturing value creation not from dividends paid out but from returns earned in excess of what capital providers demand, closely related to the Economic Value Added framework.
Residual income (RI) in any given period equals net income minus the equity charge, where the equity charge is the opening book value of equity multiplied by the cost of equity. If a company earns ₹100 crore in net profit on an equity base of ₹800 crore with a 10% cost of equity, its residual income is ₹100 crore – (₹800 crore × 10%) = ₹100 crore – ₹80 crore = ₹20 crore. The company is creating value above and beyond what its equity providers require.
The Economic Value Added (EVA) framework, popularised by Stern Stewart & Co., is a closely related concept applied at the total capital level — EVA equals NOPAT (net operating profit after tax) minus the weighted average cost of capital multiplied by invested capital. While RIM focuses on equity returns versus cost of equity, EVA captures returns on all capital against the blended cost. Both frameworks direct analytical attention toward the same fundamental question: does this business earn more than it costs to fund?
RIM is particularly useful for financial services companies in India — banks, NBFCs, insurance firms — where cash flow modelling is difficult because the distinction between operating and financing activities blurs. For a bank, lending is the core operating activity, not a financing decision. DCF models therefore struggle with banks, whereas RIM works naturally because it begins with book value (which for a bank reflects net assets) and adds the value of future excess returns above the cost of equity.
The clean surplus relation is a key accounting assumption underlying RIM: changes in book value equal net income minus dividends, with no bypass through other comprehensive income. In the Ind AS regime, several items — actuarial gains/losses on defined-benefit plans, remeasurements of financial instruments at FVOCI — flow through OCI rather than the profit and loss account, violating clean surplus. Analysts must adjust for such OCI items when applying RIM rigorously.
The appeal of RIM for Indian analysts lies in its self-correcting property: if a company consistently earns its cost of equity and no more, its intrinsic value equals its current book value regardless of dividends paid or retained. Premium to book value is justified only if the company is expected to generate residual income in the future — a discipline that guards against paying excessive premiums for businesses with undifferentiated economics.