Discounted Cash Flow (DCF)

What is Discounted Cash Flow?

Discounted Cash Flow (DCF) is a valuation method that calculates the present value of a business by projecting its future free cash flows and discounting them back to today's dollars. The core principle is that a dollar received in the future is worth less than a dollar received today, and the DCF model quantifies that difference.

Basic Formula:

Business Value = Sum of (Free Cash Flow in Year N / (1 + Discount Rate)^N) + Terminal Value / (1 + Discount Rate)^N

The calculation requires three inputs: projected cash flows, a discount rate, and a terminal value.

Key Components

Free Cash Flow Projections -- Typically modeled for five to ten years. These projections should reflect realistic assumptions about revenue growth, margin expansion or contraction, capital expenditures, and working capital requirements.

Discount Rate -- Represents the risk-adjusted return an investor requires. For private businesses, discount rates typically range from 15% to 35%, reflecting the higher risk and illiquidity of private company investments compared to public equities. The discount rate is often derived from the Weighted Average Cost of Capital (WACC) or a build-up method that accounts for company-specific risk factors.

Terminal Value -- Captures the business's value beyond the explicit projection period. It is typically calculated using either a perpetuity growth model or an exit multiple applied to the final year's cash flow. Terminal value often represents 50% to 80% of total DCF value, which is why the assumptions behind it deserve careful scrutiny.

When DCF is Used in M&A

DCF is most commonly applied in situations where:

• The business has strong growth prospects that historical earnings do not reflect.
• Cash flows are expected to change significantly over the projection period.
• The buyer is a financial investor building a returns-based investment thesis.
• No reliable comparable transaction data exists for a multiples-based approach.

For stable, profitable businesses in the lower middle market, buyers more commonly use EBITDA multiples. DCF tends to appear alongside multiples as a supplementary analysis or as the primary method for high-growth or asset-light businesses.

Strengths and Limitations

DCF's strength is that it is forward-looking and company-specific. It does not depend on comparable transactions and can capture the unique dynamics of the business being valued.

Its weakness is sensitivity to assumptions. Small changes in the discount rate, growth rate, or terminal value assumptions produce large swings in the output. This makes DCF vulnerable to manipulation -- optimistic assumptions can inflate value, while conservative assumptions can suppress it.

Advice for Sellers

Understand how a buyer's DCF model works so you can identify and challenge unfavorable assumptions. Focus on the discount rate and terminal value, as these two inputs drive the majority of the output. If a buyer presents a low DCF valuation, ask them to share their assumptions and compare them against your actual performance and realistic projections.