Discounted Cash Flow: Growth Exit Method
How to Build a Discounted Cash Flow Model: Growth Exit Method
Discounted Cash Flow (DCF) analysis is a generic method for of valuing a project, company, or asset. A DCF forecasts cash flows and discounts them using a cost of capital to estimate their value today (present value). DCF analysis is widely used across industries ranging from law to realestate and of course investment finance.
Note: If you've read our guides on DCF: Revenue Exit Method already, you can skip ahead to the Terminal Value section as you may find other sections of this guide repetitive.
Here is the general formula behind DCF models:
Since we can't keep projecting cash flows forever, most DCF models forecast cash flows individually for five or ten years and then estimate a continuing value or Terminal Value
. Terminal value represents the future value of a company beyond the projection period.
Depending on the length of the projection period, it is not uncommon for the Terminal Value
to represent 75% or more of the company's total value. Since Terminal Value
is a critical assumption, finbox.com offers three options for estimating the value: Gordon Growth approach, EBITDA Multiple and Revenue Multiple.
This guide will walk through a DCF analysis for Verizon
that uses a Growth Rate to estimate Terminal Value
.
Here is an outline of the process:

Step 1: Forecast Free Cash Flows
 Create a Revenue Forecast
 Forecast EBITDA Profit Margin
 Forecast Depreciation & Amortization Expenses
 Select a Pro Forma Tax Rate
 Plan Capital Expenditures
 Forecast Net Working Capital Investment
 Calculate Free Cash Flow

Step 2: Select a Discount Rate

Step 3: Estimate a Terminal Value

Step 4: Calculate The Equity Waterfall
I've created an Illustrative DCF Model for Verizon that you can use to follow along with this guide:
Illustrative DCF: Growth Exit Method
You can also build your own updated model on finbox.com here.
Forecast Free Cash Flows
The philosophy behind a DCF analysis argues the value of a company is equal to the expected future cash flows of that company. Since future free cash flows can be difficult to estimate directly, the model helps us build up to them. The model starts at the top of the Income Statement by creating a forecast for Revenue
and then works it's down to Net Operating Profit After Tax
(NOPAT).
Here is the formula for calculating NOPAT:
Revenue
() Operating Expenses
(=) EBIT
() Taxes
(=) NOPAT
The model then deducts cash outflows like Capital Expenditures
(CapEx) and Investment in Net Working Capital
and adds back noncash expenses from the Income Statement like Depreciation
and Amortization
(D&A) to calculate the free cash flow forecast:
NOPAT
() Capital Expenditures
() Investment in Net Working Capital
(+) Depreciation and Amortization
(=) Unlevered Free Cash Flow
Create a Revenue Forecast
When available, finbox.com uses analyst forecasts for Revenue
as the starting assumptions in a model. To forecast Revenue
, analysts gather data about the company, it's customers and the state of the industry. I typically review the analyst forecast and modify the growth rates based on historical performance, news, and other insights I've gathered.
Here is the formula the model uses to create a Revenue
forecast:
Here's the Revenue
forecast I used in my model:
Forecast EBITDA Profit Margin
How much of the revenue Verizon generates will the company convert into profit? The model uses EBITDA as a proxy for profit at this step and deducts Taxes
, Depreciation
& Amortization
expenses separately later in the model.
Here is the formula the model uses to calculate the EBITDA forecast:
This is the forecast I used in my model:
Forecast Depreciation & Amortization Expenses
Depreciation and amortization are usually part of Cost of Goods Sold (COGS) or Selling General & Administrative Expenses (SG&A). Since it's a noncash expense the model runs the D&A
forecast to estimate NOPAT but adds it back in the buildup to free cash flow. Including it in the NOPAT build allows the model to capture tax benefits associated with D&A
. To avoid double counting the outlay's associated with capital expenditures, the model deducts the actual capital expenditures forecast and adds back D&A
.
Here's the D&A
forecast I used in my model:
Select a Pro Forma Tax Rate
"In this world nothing can be said to be certain, except death and taxes."** Benjamin Franklin**
Companies are required to pay a portion of profits to the governments in the countries they operate. Historical effective tax rates
are useful for estimating a company's marginal tax rate:
Over the last five years, Verizon has paid 19.7% of it's GAAP income in taxes. This felt a little low compared to the 39.1% U.S. marginal corporate tax rate so I assumed a 30% tax rate
in my model.
The model uses the forecasts created so far to calculate the NOPAT
forecast. You can see the build to NOPAT
in the Calculation of Free Cash Flow
section of the model:
Plan Capital Expenditures
Spending on plant, property, and equipment allow the company to operate and grow. Here is the formula the model uses to forecast capital expenditures:
Verizon has spent 13.5% of revenue in the last two years on
capital expenditures. I assumed it would continue to spent
13.5% of revenue going forward in my model:
Forecast Net Working Capital Investment
As a company grows, it typically needs to tie up more cash in working capital to manage the day to day operations effectively. The model accounts for the impact of this investment on free cash flow by first estimating Net Working Capital
as a % of revenue and then deducting year over year increases from free cash flow:
Here are the formulas used to forecast investment in Net Working Capital
:
Verizon has on average required 6.3% of revenue historically for net working capital. I gradually brought net working capital toward the historical average in my forecast:
Calculate Free Cash Flow
With all required forecasts in place, calculating projected free cash flow is simple:
Select a Discount Rate
Next, we need a discount rate to calculate the present value of the forecasted free cash flows. finbox.com has a Cost of Capital that you can use to arrive at your own estimate for Cost of Capital.
I determined a reasonable WACC estimate for Verizon to be between 6.5% and 7.5%.
The model does the heavily lifting of calculating the Discount Factors
using the midyear convention. You can follow the methodology used to by reviewing the a) Discounting Periods
and b) Discounting Factors
.
Applying the Discounting Factors
however is simple. For example, to calculate the present value of December 2020 projected cash flow, we can multiply Verizon cash flow that year, $21,032, by the matching discount factor.
The model follows a similar process to compute the present value for each of the projected cash flows:
Estimate a Terminal Value
As mentioned earlier, this variation of the DCF uses the Gordon Growth method to estimate Terminal Value
.
Terminal Value = Terminal Year FCF * (1 + g) / WACC  g
WACC = Weighted Average Cost of Capital
g = Perpetuity Growth Rate
As the formula suggests, we need to estimate a Perpetuity Growth Rate
. Here is some sound guidance on selecting a perpetuity growth rate from Macabacus:
The perpetuity growth rate is typically between the historical
inflation rate of 23% and the historical GDP growth rate of 45%.
If you assume a perpetuity growth rate in excess of 5%, you are
basically saying that you expect the company's growth to outpace the
economy's growth forever.
Given Verizon is a mature company, I selected a Perpetuity Growth Rate
of 0.5% in my model with a range of +/0.5%:
Comparing the Terminal Value
implied by selected Perpetuity Growth Rate
multiple to other approaches to estimating Terminal Value
can serve as a useful sanity check. For instance, if I used the same assumptions in a DCF: EBITDA Exit model but selected a 6.8x EBITDA Exit Multiple
to calculate Terminal Value
, I would arrive at the same Fair Value
. I felt comfortable with my implied exit multiple given Verizon's current trading EV/EBITDA
multiple of 6.7x.
The Terminal Value
calculated above is the value in the future. We can use the Terminal Discount Factor
to compute the present value:
The model then adds the PV of Discrete Cash Flows
and PV of Terminal Value
together to calculate Enterprise Value
:
Calculate The Equity Waterfall
An Equity Waterfall, aka Equity Value Bridge, refers to the steps used to get from the Enterprise Value of a company to its aggregate Equity Value or Market Cap.
Here is the formula for calculating an Equity Waterfall:
Enterprise Value
() Total Debt
() Minority Interest and Other Liabilities
() Preferred Equity
() Pension
(+) Cash and Short Term Investments
= Equity Value / Market Cap
The model uses the formula above to calculate Equity Value and divides the result by the Shares Outstanding
to compute Fair Value per Share
.
Nice!
The assumptions I used in my model implied a range for Fair Value per Share
for Verizon of **$45.26 ** to $67.90. Verizon's current stock price is $55.63, 1.4% above the midpoint Fair Value
of $54.84. Verizon's 52Week Low
however is $38.06. At $38.06, Verizon would be trading at ~31% discount to my ~$55.63 computed Fair Value
. Given Verizon's long trackrecord and low price volatility (Beta
of 0.5), it would be a fantastic value at those levels. finbox.com's Price Target and Alerts features are designed to help you monitor for pullbacks in stock price until the entry point suits your investment objectives.
Next Steps
The DCF model can seem complex as first but it's worth adding to your investment analysis toolbox since it provides the clearest view on value of a company.
"It is better to be roughly right than precisely wrong"** John Maynard Keynes**
Instead of focusing on the getting each of the assumptions exactly right, take Keynes' advice on being roughly right. Select different reasonable assumptions to get a sense for key drivers of value. You can save different scenarios (e.g. Base Case, Downside Case etc.) to get comfortable the upside and downside potential of the company. As with all models on finbox.com, I recommend using a combination of models to get a sense for the risk involved and triangulate a fair value.
Sources / Further Reading:
 Working With Financial Models
 Investopedia: What is a Discounted Cash Flow (DCF)?
 Definition of Gordon Growth
 Definition of Revenue Multiple
 Definition of EBITDA Multiple
 Definition of Enterprise Value
 Definition of Equity Waterfall
 Compound Annual Growth Rate
 WACC Model
 Video on Discount Factors and NPV
 Mid Year Convention
 Discounted Cash Flow: EBITDA Exit Method
 Discounted Cash Flow: Revenue Exit Method