Forecast Period

In a discounted cash flow model, analysts usually forecast detailed cash flows year by year for a set period, often five to ten years. Beyond that, they estimate a terminal value to capture all later cash flows in a single figure.

The forecast period should be long enough for the company to reach a stable state, where its growth rate, profit margins and investment needs have settled at levels that can reasonably be expected to continue. For a mature company, five years may be enough. For a fast-growing company, a longer period, perhaps ten years or more, may be needed so that growth can slow gradually before the terminal value takes over.

For example, an analyst valuing a young technology company might forecast cash flows for ten years, with revenue growth slowing from 30% to 5%, before applying a terminal value.

The choice of forecast period matters. Too short a period may force unrealistic assumptions into the terminal value, which often already accounts for a large share of total value. Too long a period means forecasting further into an uncertain future, where projections become increasingly speculative.