DCF Valuation: Step-by-Step Model with Worked Example

Last Updated: December 2025

A discounted cash flow (DCF) valuation estimates the intrinsic value of a business by projecting its future free cash flows and discounting them back to present value using a risk-adjusted rate. Unlike market multiples, which depend on comparable transactions, the DCF method is grounded in the specific economics of the business being valued , making it the preferred approach when a company’s future cash generation is the primary value driver.

At Sofer Advisors, our certified valuation professionals build DCF models for acquisitions, estate planning, shareholder disputes, and financial reporting engagements across Atlanta and throughout the United States. This guide walks through every step of a complete DCF model using a real-world hypothetical company so you can understand exactly how the math works , and where the judgment calls live.

Key Takeaways

• A DCF model has five core steps: project free cash flows, calculate WACC, estimate terminal value, discount everything to present value, and bridge from enterprise value to equity value.
• Terminal value typically represents 60-75% of total enterprise value in a DCF model , making your growth rate and exit assumptions the most consequential inputs.
• WACC for a small private company is often 12-18%, substantially higher than the 8-10% WACC applied to large public companies, due to size premiums and illiquidity.
• Sensitivity analysis is not optional: a 1% change in WACC or terminal growth rate can shift a $5M valuation by $500K-$800K in either direction.
• The DCF method works best when a business has at least 3 years of consistent financial history, predictable margins, and a defined growth strategy , not for distressed or pre-revenue companies.

What Company Are We Using in This DCF Example?

To make this guide concrete, we use a hypothetical company: Cascade Industrial Supply, a B2B distributor of maintenance, repair, and operations (MRO) products serving manufacturing facilities in the Southeast. Cascade has $5 million in annual revenue, $800,000 in EBITDA (a 16% margin), and a stable customer base with contracts renewing annually. The owner is exploring a sale in the next 18-24 months and has engaged a valuation firm to establish a defensible enterprise value.

Key financial facts: $120,000 in annual depreciation and amortization, $150,000 in annual capital expenditures, working capital needs growing at roughly $30,000 per year, and an effective tax rate of 25%. Long-term debt is $800,000 and cash on hand is $150,000.

How Do You Project Free Cash Flows for a DCF Model?

Free cash flow to the firm (FCFF) is what remains after a company has paid taxes, funded its capital expenditures, and covered working capital needs. The formula is: EBITDA minus taxes (applied to EBIT), plus D&A added back, minus capex, minus changes in net working capital.

For Cascade, we apply a growth rate of 8% in years 1-3, reflecting the contracted pipeline and regional expansion, then slow to 5% in years 4-5 as growth normalizes. Taxes are applied at 25% to EBIT ($800K minus $120K D&A = $680K EBIT; 25% tax = $170K).

Growth rate assumptions must be supportable. An 8% growth rate for a $5M revenue distributor is reasonable if backed by a signed contract pipeline, new geographic coverage, or demonstrated customer acquisition velocity. An unsupported 15% growth assumption would be challenged in any litigation or tax context.

How Do You Calculate WACC for a Private Company?

Cost of Equity: Risk-free rate: 4.5% (10-year U.S. Treasury). Equity risk premium: 5.5%. Beta: 1.2 (industrial distribution). Size premium: 3.0% (Kroll/Duff & Phelps data for sub-$500M companies). Company-specific risk: 1.0% (customer concentration). Cost of Equity = 4.5% + (1.2 × 5.5%) + 3.0% + 1.0% = 15.1%.

After-Tax Cost of Debt: 7.5% × (1 − 0.25) = 5.6%.

Capital Structure: 70% equity, 30% debt.

WACC: (15.1% × 0.70) + (5.6% × 0.30) = 10.57% + 1.68% = 12.3%.

A 12.3% WACC reflects the real risk profile of a sub-$10M private company , far higher than the 8-9% WACC applied to S&P 500 companies in textbooks. Failing to apply an appropriate size premium is one of the most common errors in small business DCF models.

How Do You Calculate Terminal Value in a DCF?

Terminal value estimates the present value of all cash flows from year 6 onward, and typically accounts for 60-75% of total enterprise value.

Gordon Growth Model: TV = FCF Year 5 × (1 + g) / (WACC − g) = $620K × 1.03 / (12.3% − 3.0%) = $638.6K / 9.3% = $6.87M.

Exit Multiple Method: $800K EBITDA × 7.0x = $5.60M.

Blended average: ($6.87M + $5.60M) / 2 = $6.24M. This blended approach is standard when both methods are defensible and neither dominates by a large margin.

How Do You Discount Cash Flows to Present Value?

Using a 12.3% discount rate, we calculate the present value factor for each year and discount the terminal value at the Year 5 factor.

The PV of discrete cash flows (years 1-5) totals approximately $1.88M , about 35% of enterprise value. The PV of terminal value is approximately $3.50M , about 65%. If terminal value exceeded 80%, that would signal over-optimism in the growth assumptions or an unrealistically low WACC.

How Do You Get from Enterprise Value to Equity Value?

Enterprise value represents the total value of the business to all capital providers. To arrive at equity value , what the owner receives in a sale , we perform the equity bridge:

• Enterprise Value: $5.38M
• Less: Total Debt: ($800K)
• Plus: Cash: $150K
• Equity Value: $4.73M

This number becomes the anchor for purchase price negotiations, earnout structures, and rollover equity terms. Reconciling against market multiples: if comparable industrial distributors trade at 5.0x-6.5x EBITDA, the implied range is $4.0M-$5.2M , consistent with the DCF output and confirming both methods are telling the same story.

Why Does Sensitivity Analysis Matter in a DCF?

No DCF output should be presented as a single point estimate. The table below shows how enterprise value changes across three scenarios by varying the three most consequential inputs.

The spread between conservative and optimistic equity value is nearly $2.8M. Buyers anchor to conservative assumptions; sellers anchor to optimistic ones. A third-party certified appraisal establishes the base case with documented support, giving both parties a credible midpoint.

What Are the Most Common DCF Mistakes to Avoid?

Using inflated growth rates is the most common error , projecting 20% growth for a business with 6% historical growth is indefensible. Ignoring capex requirements inflates FCF materially; a business cannot grow revenue 15% per year without investing in equipment, technology, or people. Applying public company discount rates to private businesses , using 9% WACC for a $5M distributor , significantly overstates value and will not survive scrutiny. Treating terminal value as an afterthought is particularly costly since it represents 60-70% of enterprise value. Finally, forgetting the equity bridge , confusing enterprise value with equity value , creates unpleasant surprises at the closing table.

Frequently Asked Questions

What is a DCF valuation in simple terms?

A DCF valuation asks: how much is this stream of future cash flows worth today? It projects the free cash flows a business will generate over the next 5 years, estimates a terminal value for all years beyond that, and discounts everything back to present value using a risk-adjusted rate called WACC. The result is an estimate of intrinsic value based on the business’s own economics , not what similar companies recently sold for.

What is a good WACC for a small private company?

Most small private companies with $1M-$20M in revenue will have WACC in the range of 12-18%, depending on industry, leverage, and company-specific risk factors. This is substantially higher than the 8-10% WACC applied to large public companies because small companies carry size premiums, liquidity discounts, and greater dependence on key personnel. An inappropriately low discount rate is one of the most common errors in small business valuations.

How do you calculate terminal value in a DCF?

The two most common methods are the Gordon Growth Model and the exit multiple method. The Gordon Growth Model uses: FCF × (1 + g) / (WACC − g), where g is typically 2-4%. The exit multiple method applies an industry EBITDA multiple to normalized earnings. Many practitioners average both methods to reduce dependence on any single assumption and cross-check the reasonableness of each independently.

What is free cash flow and why does DCF use it?

Free cash flow to the firm (FCFF) is EBITDA minus taxes on operating income, minus capex, minus changes in working capital, plus non-cash charges like D&A. It represents the cash actually generated by the business available to all capital providers. DCF uses free cash flow rather than net income or EBITDA because it reflects the true economic return after all reinvestment requirements have been funded.

How does DCF differ from using a market multiple?

A market multiple values a business by comparison to similar transactions , it is fast and anchored to observable market data, but does not capture the specific growth trajectory of a particular business. DCF is more labor-intensive but provides intrinsic value based on the company’s own cash flow characteristics. Both methods should be applied and reconciled. Significant divergence between the DCF result and market multiples is a signal to re-examine assumptions carefully.

What is the equity bridge in a DCF model?

The equity bridge converts enterprise value to equity value , what the owner actually receives in a sale. The formula is: Enterprise Value minus total interest-bearing debt, plus excess cash. In Cascade’s case: $5.38M minus $800K in debt plus $150K in cash equals $4.73M in equity value. This is the actual closing proceeds figure, making the equity bridge one of the most practically important steps in the model.

How sensitive is a DCF valuation to the discount rate?

Highly sensitive. In Cascade’s model, a 1% increase in WACC from 12.3% to 13.3% reduces enterprise value by approximately $400K-$500K. A 1% reduction in terminal growth rate produces a similar decline. These two inputs together can shift total enterprise value by $800K-$1M in either direction , which is why sensitivity tables are a required component of any credible DCF analysis.

Can I build my own DCF model as a business owner?

You can build a preliminary model to understand the range of value, and doing so will give you much better intuition for how buyers think about your business. However, a self-prepared DCF will not satisfy the standard of care required for IRS tax filings, litigation, or M&A due diligence. Those contexts require a certified appraisal prepared by a credentialed professional under USPAP or AICPA SSVS standards.

What are the most common DCF valuation mistakes?

The most frequent errors are: using an unrealistically high revenue growth rate unsupported by historical performance; applying a discount rate too low for a small private company’s actual risk profile; omitting required capex from free cash flow calculations; using a terminal growth rate that implausibly exceeds long-run GDP growth; and failing to reconcile the DCF conclusion against market multiples. Each mistake can inflate or deflate the final value by hundreds of thousands of dollars.

When should a business owner get a formal DCF appraisal?

A formal DCF appraisal is warranted when the valuation will be used in an IRS filing (estate tax, gift tax, Section 409A), in litigation (shareholder disputes or divorce), in a financing transaction (SBA loan or recapitalization), or in a sale process where a defensible enterprise value is needed for negotiation. For internal planning, an owner-prepared model is often sufficient but should be stress-tested regularly against current market conditions.

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Executive Summary

A DCF valuation builds enterprise value from the ground up by projecting a company’s free cash flows, estimating terminal value, and discounting everything back to present value using a risk-adjusted WACC. For Cascade Industrial Supply, a $5M revenue B2B distributor, this process produced an enterprise value of approximately $5.38M and an equity value of $4.73M after debt and cash. The model’s most consequential inputs are the terminal growth rate and the discount rate, which together can shift the equity value conclusion by $2M or more. Every serious DCF analysis must include sensitivity tables, reconciliation against market multiples, and thorough documentation of all assumptions , particularly when the valuation will be reviewed by the IRS, opposing counsel, or a sophisticated acquirer.

What Should You Do Next?

If you are planning a sale, contemplating a shareholder buyout, or preparing for an estate transfer, a certified DCF valuation from Sofer Advisors gives you a defensible, court-ready number backed by USPAP standards. Visit soferadvisors.com to request a consultation, or contact our Atlanta office to discuss your situation and timeline.

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Ready to discuss your valuation needs? Schedule a free consultation with David Hern CPA ABV ASA. Sofer Advisors responds within one business day.

About the Author

This guide was prepared by David Hern CPA ABV ASA, founder of Sofer Advisors – a business valuation firm headquartered in Atlanta, GA serving clients across the United States. David holds dual accreditations as an Accredited Senior Appraiser (ASA) and is Accredited in Business Valuation (ABV), credentials recognized by the IRS, SEC, and FINRA. He also holds the Certified Exit Planning Advisor (CEPA) designation. With 15+ years of valuation experience, David has served as an expert witness in 11+ cases across multiple jurisdictions and built Sofer Advisors into an Inc. 5000-recognized firm with 180+ five-star Google reviews. The firm’s full W2 employee team maintains subscriptions to all major valuation databases and operates under a next business day response policy.

For professional business valuation services, visit soferadvisors.com or schedule a consultation.

This article provides general information for educational purposes only and does not constitute legal, tax, financial, or professional advice – consult qualified professionals regarding your specific circumstances.