Business Valuation Discount Rate: What it is and How to Calculate It

The business valuation discount rate is the single most influential variable in determining what a company is worth today. It converts projected future earnings into present-day dollars, accounting for risk, inflation, and opportunity cost. A small miscalculation of even half a percentage point can shift a company’s estimated value by hundreds of thousands of dollars or more.

Whether you are a startup founder pricing stock options through a 409A valuation, a CFO preparing for a merger, or an investor evaluating a deal, understanding how discount rates work gives you a strategic advantage. It separates informed decision-makers from those relying on guesswork.

In this comprehensive guide, Transaction Capital LLC breaks down everything you need to know about discount rates in business valuation from the core formulas (WACC and CAPM) to lesser-known methods like the build-up approach. We will cover each component, provide real-world calculation examples, address current 2026 market conditions, and explain common mistakes that lead to audit failures.

What Is a Business Valuation Discount Rate and Why Does It Matter?

A business valuation discount rate is the expected rate of return that an investor requires to justify the risk of putting money into a particular business. It reflects the time value of money the principle that a dollar received today carries more value than a dollar promised a year from now.

In practice, valuators apply the discount rate to a company’s projected future cash flows through a discounted cash flow (DCF) analysis to arrive at their present value. The higher the perceived risk, the higher the discount rate and the lower the company’s estimated worth.

Typical discount rates for business valuations range from 8% to 25%, influenced by factors including:

• Company size and maturity stage
• Industry risk profile and regulatory environment
• Current market conditions and interest rate levels
• Capital structure (debt-to-equity ratio)
• Management quality and depth
• Customer and revenue concentration

For early-stage startups, rates frequently fall between 20–35% due to limited operating history and execution uncertainty. Established mid-market companies with predictable cash flows typically use rates in the 12–18% range. Large, publicly traded blue-chip firms may have rates as low as 8–12%.

The discount rate goes by several names in practice: cost of equity, required rate of return, cost of capital, and hurdle rate. While these terms have technical distinctions, they all relate to the fundamental concept of pricing risk into a valuation.

How Do You Calculate the Discount Rate in Business Valuation?

Professional valuators rely on several analytical frameworks to determine the appropriate discount rate. The right approach depends on the company’s structure, data availability, and the purpose of the valuation. Three primary methodologies dominate modern practice.

1. The WACC Method: Blending Debt and Equity Costs

The Weighted Average Cost of Capital (WACC) represents the blended return required by all capital providers, both lenders and shareholders. It is the most widely used discount rate for enterprise-level valuations and DCF analyses.

WACC = (E/V × Re) + (D/V × Rd × (1 – T))

Where:

• E = Market value of equity
• D = Market value of debt
• V = Total value of capital (E + D)
• Re = Cost of equity
• Rd = Cost of debt (interest rate)
• T = Corporate tax rate

Example Calculation: Consider a SaaS company with 60% equity financing (cost of equity: 12%) and 40% debt financing (interest rate: 6%, tax rate: 25%):

WACC = (0.60 × 12%) + (0.40 × 6% × 0.75) = 7.2% + 1.8% = 9.0%

This 9% rate becomes the benchmark for discounting the company’s projected free cash flows. If the company’s internal rate of return exceeds 9%, the investment creates value. If it falls below, the project or business destroys value from the investor’s perspective.

Important consideration: While adding debt can initially lower the overall WACC (because debt is cheaper than equity after tax savings), excessive leverage raises the cost of equity as financial risk increases. Beyond a certain threshold, more debt actually pushes WACC higher.

2. The CAPM Method: Pricing Systematic Risk

The Capital Asset Pricing Model (CAPM) estimates the cost of equity by measuring a company’s exposure to market-wide risk. It uses this formula:

Re = Rf + β × (Rm – Rf) + CSP

Where:

• Rf = Risk-free rate (typically 10- or 20-year U.S. Treasury yield)
• β (Beta) = A measure of the company’s volatility relative to the overall market
• Rm – Rf = Equity risk premium (the extra return investors demand for stocks over risk-free bonds)
• CSP = Company-specific risk premium

CAPM works best when reliable beta data is available – typically for publicly traded companies or private firms with strong comparable sets. For small private companies where beta data is unreliable or unavailable, the build-up method is preferred.

3. The Build-Up Method: Stacking Risk Premiums

The build-up method is widely used for valuing small and mid-sized private companies. Instead of relying on beta, it constructs the discount rate by layering individual risk components:

Equity Discount Rate = Risk-Free Rate + Equity Risk Premium + Size Premium + Industry Risk Premium + Company-Specific Risk Premium

Based on our experience at Transaction Capital LLC working with 2,500+ clients across 35+ industries, the build-up method often produces the most defensible rates for private company valuations, especially in litigation and IRS audit contexts where each component must be independently justified.

4. Adjusted Present Value (APV)

The Adjusted Present Value method separates the base case value of a company (as if it were all-equity financed) from the value created by its financing decisions, particularly tax shields from debt. It uses the cost of equity as the discount rate for base cash flows:

APV = NPV (All-Equity Financed) + NPV (Tax Shield from Debt)

APV is particularly useful in highly leveraged transactions or private equity deal analysis. When a company’s capital structure is expected to change significantly over the projection period, APV often provides more accurate results than WACC, which assumes a constant capital structure.

What Components Make Up the Business Valuation Discount Rate?

Each component of the discount rate captures a distinct category of risk. Understanding them individually strengthens your ability to assess and challenge valuation conclusions.

1. Risk-Free Rate: The Foundation

The risk-free rate compensates investors purely for the time value of money, stripping away all default risk. It establishes the absolute floor for any discount rate.

Common sources include:

• Primary benchmark: 20-year U.S. Treasury bond yield (currently in the 4.2–4.8% range as of early 2026)
• Alternative: 10-year Treasury for shorter projection horizons
• Kroll’s normalized risk-free rate: 3.5% (used when spot yields appear temporarily elevated or depressed)

For international valuations, practitioners start with the U.S. Treasury baseline and layer on country risk premiums to account for sovereign default risk, currency volatility, and political instability.

2. Equity Risk Premium (ERP)

The equity risk premium captures the additional return of investors’ demand for holding stocks rather than risk-free government bonds. It reflects broad market volatility and economic uncertainty.

As of September 2025, Kroll (formerly Duff & Phelps) recommends a U.S. ERP of 5.0% when developing USD-denominated discount rates. This rate was temporarily raised to 5.5% in April 2025 due to trade conflict uncertainty before being lowered back as tensions eased.

Historical ERP estimates typically range between 4.0% and 7.0%, depending on the data source and methodology. The two main approaches are:

• Historical method: Calculates the average premium stocks have earned over bonds across decades of market data
• Forward-looking (implied) method: Derives the premium from current market pricing and earnings expectations

3. Beta Coefficient: Measuring Market Sensitivity

Beta quantifies how much a company’s returns move relative to the broader market:

• Beta = 1.0: The company moves in lockstep with the market
• Beta > 1.0: More volatile than the market (e.g., airlines, auto dealers)
• Beta < 1.0: Less volatile (e.g., grocery stores, utilities)

For private companies without publicly traded stock, practitioners use proxy betas from comparable public companies, then adjust for capital structure differences:

Unlevered Beta = Levered Beta ÷ [1 + (1 – Tax Rate) × (Debt/Equity)]

Re-levered Beta = Unlevered Beta × [1 + (1 – Tax Rate) × (Target Debt/Equity)]

Best practices for beta selection:

• Source peer data from Bloomberg, Capital IQ, or Kroll Cost of Capital Navigator
• Use 2-year weekly or 5-year monthly return data for statistical stability
• Apply adjustments for thin trading in smaller-cap stocks
• Select at least 5–8 comparable companies to reduce individual company noise

4. Size Premium: The Small Company Effect

Smaller companies face additional risk factors that the equity risk premium and beta alone do not capture. They tend to have less access to capital, higher failure rates, lower liquidity, and greater management dependence.

Kroll (Duff & Phelps) Size Premium Data:

Company Size Category	Approximate Size Premium
Micro-cap (under $300M market cap)	5.2% – 6.8%
Small-cap ($300M – $2B)	3.8% – 4.5%
Mid-cap ($2B – $10B)	2.1% – 2.8%
Large cap (over $10B)	0.5% – 1.2%

For very small private businesses (under $10M in revenue), size premiums can reach 7% or higher. These premiums are sourced from the Kroll CRSP Deciles Size Study and updated annually.

5. Company-Specific Risk Premium (CSRP)

The CSRP captures unique risks that are specific to the individual business and not reflected in market-wide data. This is the most subjective component, yet it often has the largest impact on the final discount rate.

In our valuation practice, our ABV® and ASA certified appraisers have found that these risk factors most commonly drive CSRP adjustments:

Risk Factor	Typical Premium Range	What It Captures
Key person dependency	1% – 3%	Revenue tied to a single executive
Customer concentration	1% – 4%	Over-reliance on one or few clients
Regulatory uncertainty	2% – 5%	Pending legislation, compliance exposure
Revenue volatility	1% – 3%	Inconsistent year-over-year earnings
Product concentration	1% – 3%	Dependence on a single product line
Geographic concentration	0.5% – 2%	Operations limited to one region
Competitive environment	1% – 3%	Low barriers to entry, intense competition

How to defend CSRP to auditors: Document each risk factor with quantitative evidence rather than subjective opinions. Use SWOT analysis frameworks, customer concentration percentages, revenue stability metrics, and management succession documentation. Vague justifications such as “the company is risky” will not survive IRS or audit scrutiny.

6. Industry Risk Premium (IRP)

Different industries carry varying levels of market-correlated risk. The IRP adjusts for sector-specific exposures that beta alone may not fully capture.

Key reference sources:

• Industry beta benchmarks from Kroll Cost of Capital Navigator
• Risk assessments from the Kroll Risk Premium Report
• Sector-focused data from Bloomberg and S&P Capital IQ

For instance, technology companies may carry a higher IRP due to rapid disruption cycles, while regulated utilities tend to have lower premiums reflecting stable cash flows.

What Is the Difference Between Discount Rate and Capitalization Rate?

A frequent source of confusion in business valuation is the distinction between the discount rate and the capitalization rate. While related, they serve different purposes:

• Discount rate is applied to a series of projected future cash flows (multi-period model) in a DCF analysis
• Capitalization rate is applied to a single normalized cash flow (single-period model) in a direct capitalization approach

The relationship is straightforward:

Capitalization Rate = Discount Rate – Long-Term Growth Rate

For example, if the discount rate is 18% and the expected long-term growth rate is 3%, the capitalization rate equals 15%.

The DCF approach is preferred for companies with fluctuating or high-growth cash flows. The direct capitalization method works best for stable businesses with predictable, steady earnings.

How Do Discount Rates Differ Across Valuation Methods?

The selection of valuation methods and discount rates depend on company characteristics, available data, and the purpose of the engagement.

1. Discounted Cash Flow (DCF) Analysis

The discounted cash flow method suits businesses with established cash flows and reliable financial projections. It requires:

• Multi-year free cash flow forecasts (typically 5–10 years)
• An appropriate discount rate (WACC for enterprise value, cost of equity for equity value)
• Terminal value calculation (representing value beyond the projection period)
• Sensitivity analysis testing different discount rate assumptions

Transaction Capital LLC frequently uses DCF for mature companies seeking valuations for M&A transactions, financial reporting, and tax compliance.

2. Market-Based Approaches

Market multiples serve as reality checks for discount rate assumptions. By comparing a subject company’s metrics against similar businesses, valuators can validate whether their income approach conclusions are reasonable. Common multiples include:

• Price-to-earnings (P/E) ratios
• Enterprise value-to-EBITDA
• Revenue multiples
• Book value multiples

Implied discount rates can be reversed from market multiples, providing an independent benchmark.

3. Asset-Based Methods

For companies with significant tangible assets or limited operating history, asset-based approaches may supplement income methods. These typically require lower discount rates reflecting asset-specific risks rather than business operational uncertainty.

How Do 2026 Market Conditions Affect Discount Rate Selection?

Market conditions in 2026 create a unique environment for discount rate determination. As one industry analysis noted, 2026 has been characterized as “a discount-rate year, not an earnings year” – meaning the cost of capital, rather than earnings growth, has become the binding constraint on valuations.

Interest Rate Environment

The Federal Reserve’s monetary policy directly influences the risk-free rate foundation. With 20-year Treasury yields in the 4.2–4.8% range and Kroll’s normalized risk-free rate holding at 3.5%, the baseline for discount rates remains elevated compared to the historically low rates of 2020–2021.

Rising interest rates increase discount rates across the board, leading to:

• Higher borrowing costs for companies
• Increased investors return expectations
• Downward pressure on business valuations
• More challenging fundraising conditions for startups

Trade Policy and Economic Uncertainty

The trade tensions and tariff fluctuations of 2025 prompted Kroll to temporarily raise its U.S. ERP recommendation from 5.0% to 5.5% in April 2025. While the premium returned to 5.0% by September 2025 as tensions eased, this episode illustrates how quickly geopolitical risk can flow through to discount rates.

Industry-Specific Dynamics

Different sectors face distinct risk profiles requiring adjusted discount rates in the current environment:

• Technology/AI companies: Higher growth potential but elevated uncertainty around monetization and capital discipline
• Healthcare/Biotech: Regulatory risk from changing federal policy; extended development timelines
• Real estate: Heightened interest rate sensitivity driving cap rate expansion
• Manufacturing: Trade policy exposure and supply chain restructuring costs
• Energy: Transition risk and commodity price volatility

ESG Integration

Environmental, Social, and Governance factors increasingly influence discount rate selection. Companies with strong ESG profiles may justify lower discount rates due to reduced regulatory exposure, enhanced access to capital, and improved operational resilience.

Transaction Capital LLC incorporates ESG principles into its valuation methodology where relevant, reflecting modern investment priorities.

What Are Current Discount Rate Benchmarks for Business Type?

Understanding typical ranges helps validate calculations and supports defensible conclusions. Based on our practice experience across 2,500+ engagements:

Business Type	Discount Rate Range	Key Risk Factors
Pre-Revenue Startup	30% – 50%	No operating history, concept stage, maximum execution risk
Early-Stage Startup (some revenue)	25% – 35%	Market uncertainty, limited track record, cash burn
Small Business ($5M–$50M revenue)	20% – 25%	Size premium, key person dependency, customer concentration
Mid-Market ($50M–$500M revenue)	15% – 20%	Operational scalability, market competition, management depth
Large Private Firm ($500M+ revenue)	12% – 17%	Market position, financial resources, professional management
Public Blue-Chip Company	8% – 14%	Market liquidity, regulatory compliance, diversified operations

An equity discount rate in the 12% to 20% range is generally considered reasonable for a typical private company’s valuation. Rates below 10% or above 25% deserve additional scrutiny and documentation, though they may be justified by specific facts and circumstances.

Discount Rate vs. IRR vs. Capitalization Rate: What’s the Difference?

These three metrics are frequently confusing. Here’s how they differ:

Attribute	Discount Rate	Internal Rate of Return (IRR)	Capitalization Rate
Definition	Required rate of return for an investment	Rate at which NPV equals zero	Discount rate minus long-term growth
Purpose	Valuation benchmark	Investment yield measurement	Single-period income capitalization
Focus	Risk-adjusted cost of capital	Cash flow profitability	Stabilized income conversion
Inputs	Risk components, capital structure	Actual cash inflows/outflows	Discount rate, growth rate
Typical Use	DCF analysis, M&A, tax valuation	Venture capital, ROI analysis, hurdle rates	Stable business valuation, real estate
Decision Rule	Compare IRR to discount rate	Accept if IRR > discount rate	Apply to single normalized cash flow

In value-creating investments, the IRR should exceed the calculated discount rate. This relationship guides investment acceptance decisions for private equity firms, venture capitalists, and corporate development teams.

What Are Common Mistakes in Discount Rate Calculation?

Errors in discount rate selection represent one of the most frequent reasons valuations fail under audit or litigation scrutiny. Our ASA and CVA® certified experts have identified these recurring pitfalls:

1. Using Outdated Market Data

Stale risk-free rates or equity risk premiums can materially distort valuations. The risk-free rate should reflect market conditions as of the valuation date, not a date from months earlier. Professional valuators update these inputs for every engagement.

2. Ignoring Company-Specific Risks

Generic industry discount rates miss what makes each business unique. A medical device company with FDA approval is fundamentally different from one still in clinical trials. Each business requires individual assessment of management quality, customer concentration, competitive position, financial stability, and growth sustainability.

3. Inconsistent Cash Flow and Discount Rate Pairing

The discount rate must match the risk profile of the cash flows being discounted. Optimistic revenue projections paired with a conservative discount rate produces inflated valuations. Conservative forecasts paired with high discount rates understate value. Consistency between assumptions is critical.

4. Neglecting Terminal Value Sensitivity

Terminal value typically represents 60–80% of total business value in a DCF analysis. A 0.5% change in the terminal growth rate can shift terminal value by 8–15%. Conservative terminal growth rates aligned with long-term GDP growth (2–3%) are essential for credibility and audit defensibility.

5. Double-Counting Risk

This occurs when a risk factor is captured in both the cash flow projections and the discount rate. For example, if a valuator reduces projected revenue to reflect customer concentration risk AND adds a CSRP for the same risk, the impact is counted twice, artificially deflating the valuation.

6. Selecting Artificially Low Rates to Inflate Value

A discount rate that doesn’t genuinely reflect investment risk may produce a higher valuation on paper, but it won’t survive scrutiny from auditors, the IRS, or opposing counsel in litigation. Credibility always matters more than a flattering number.

How Do You Choose the Right Discount Rate for Your Business?

Selecting the right discount rate requires careful evaluation of company-specific characteristics, industry dynamics, and market conditions. Professional valuators rely on multiple data sources and proven methodologies to ensure defensible rate selection.

Size Premium Considerations

Smaller companies typically require higher discount rates due to compounding risk factors:

• Limited diversification across products and customers
• Higher failure rates and reduced liquidity
• Heavy dependence on key management personnel
• Restricted access to capital and higher borrowing costs

The Kroll Cost of Capital Navigator (formerly Duff & Phelps) provides annually updated, empirically backed size premium data. Micro-cap premiums range from 5.2%–6.8%, while mid-cap companies typically fall between 2.1%–2.8%.

Industry Risk Analysis

Each industry carries unique risk factors influencing the discount rate. Key drivers include:

• Regulatory environment and compliance exposure
• Technology disruption and obsolescence risk
• Competitive dynamics and barriers to entry
• Economic sensitivity and cyclicality
• Capital intensity and reinvestment requirements

Valuators source industry risk premiums from the Kroll Risk Premium Report, Bloomberg industry betas, and sector-focused research. In 2026, AI disruption and shifting trade policies make industry-level risk assessment more nuanced than ever.

Geographic and Economic Factors

Location-specific risks may require additional premium adjustments, especially for businesses with international exposure:

• Political stability and governance uncertainty
• Currency fluctuations on cross-border revenue
• Market maturity and institutional infrastructure
• Local regulatory and tax environments
• Regional macroeconomic conditions

Even within the United States, regional economic disparities can influence risk assessment. A company concentrated entirely in a single metro area faces geographic concentration risk that a nationally diversified competitor does not and that distinction should be reflected in the company-specific risk premium.

How Do Discount Rates Impact Specific Valuation Scenarios?

1. 409A Valuations and Stock Option Pricing

For 409A valuations, the discount rate directly affects the fair market value of common stock, which determines the minimum strike price for employee stock options. An improperly calculated rate can result in either overvalued options (attracting IRS penalties including a 20% excise tax on employees) or undervalued shares that create compliance risks during fundraising.

2. Fundraising and Investor Due Diligence

Sophisticated investors scrutinize discount rate assumptions during due diligence. Appropriate rates help justify valuation of multiples, support growth projections, demonstrate market awareness, and build investor confidence.

3. Tax and Compliance Reporting

IRS and audit requirements demand supportable discount rate methodologies. Professional valuations that comply with Revenue Ruling 59-60, USPAP, and SSVS standards ensure audit firm acceptance, regulatory scrutiny resistance, and documentation completeness.

4. Litigation and Disputes

Court proceedings require defensible discount rate selections backed by market evidence, published data sources, and professional judgment. Expert testimony in divorce proceedings, shareholder disputes, and damages cases frequently focus on methodology appropriateness, data source credibility, and calculation of transparency.

How Is a Discount Rate Sensitivity Analysis Performed?

Sensitivity analysis demonstrates how changes in the discount rate affect a company’s calculated value. It is a critical tool for understanding valuation ranges and communicating results to stakeholders.

Example: Impact of Discount Rate on a Company with $2M Annual Free Cash Flow and 3% Terminal Growth Rate:

Discount Rate	Implied Enterprise Value	Change from Base Case
14%	$18.2M	+23%
16%	$15.4M	+4%
17% (Base Case)	$14.3M	—
18%	$13.3M	-7%
20%	$11.8M	-18%

A mere 3-percentage-point swing in the discount rate (from 14% to 17%) changes the indicated value by over $3.9 million – a 23% difference using identical cash flow assumptions. This is why professional determination of the discount rate matters enormously.

What Trends Are Shaping Discount Rate Practices in 2026?

1. The Discount-Rate Constraint

Market analysts increasingly describe 2026 as a year where the cost of capital, rather than earnings growth, acts as the primary gatekeeper for valuations. With inflation remaining above pre-pandemic norms and term premiums elevated, higher risk-free yields raise the hurdle rate for all asset classes.

2. Technology and AI Disruption

Digital transformation continues to reshape business risk profiles. Companies that have successfully integrated AI and automation may justify lower discount rates due to improved scalability, operational efficiency, and competitive positioning. Conversely, companies facing AI-driven disruption may require higher rates.

3. Advanced Risk Modeling

Professional valuators now employ more sophisticated analytical tools, including:

• Monte Carlo simulations for probability-weighted discount rate scenarios
• Scenario analysis testing multiple economic environments
• Real options valuation for businesses with significant optionality
• Dynamic discount rate modeling that varies rates across projection periods

4. Data Accessibility

The Kroll Cost of Capital Navigator and similar platforms have made industry-specific cost of capital data more accessible and standardized. This reduces the subjectivity in discount rate selection and improves consistency across valuations – but also raises the bar for practitioners who must demonstrate they’ve used current, authoritative data.

Final Thoughts

Mastering the business valuation discount rate is not merely an academic exercise. It directly shapes investment decisions, fundraising outcomes, tax compliance, and legal dispute resolutions. The difference between a well-supported rate and a carelessly chosen one can mean millions of dollars in value – and the difference between passing and failing an IRS audit.

Professional valuation firms bring the expertise, data access, and methodological rigor needed to produce defensible discount rates. From selecting the right model (WACC, CAPM, or build-up) to documenting every component with market evidence, the process requires both technical skill and practical judgment.

Why Choose Transaction Capital LLC?

Transaction Capital LLC is a trusted provider of 409A valuations and comprehensive business valuation solutions, supporting startups and growth enterprises across 35+ industries. Our credentialed professionals produce audit-ready valuations that satisfy IRS examination requirements while supporting equity compensation initiatives and fundraising activities.

Professional Credentials:

• ABV® (Accredited in Business Valuation) – AICPA
• ASA (Accredited Senior Appraiser) – American Society of Appraisers
• MRICS – Royal Institution of Chartered Surveyors
• CVA® (Certified Valuation Analyst) – NACVA

What sets us apart:

• 2,500+ valuations completed across 35+ industries
• 15+ years’ experience in investment banking and venture capital
• Turnaround in 2–5 business days
• Pricing starting at $500
• Pay After Draft Review – no payment until you verify the quality

Don’t let compliance uncertainties or inaccurate discount rate assumptions jeopardize your business decisions. Get audit-ready, IRS-compliant valuations from credentialed professionals who understand your industry dynamics, growth trajectory, and strategic objectives.

Frequently Asked Questions (FAQs)

1. What is a good discount rate for a private business valuation?

Most private companies fall within a 12%–20% equity discount rate range. Smaller, riskier businesses may require 20–25%, while larger, stable firms may justify 10–15%. The right rate depends on company size, industry, and documented risk factors.

2. How often should a business valuation discount rate be updated?

At least annually, or whenever significant changes occur, such as Federal Reserve rate shifts, capital structure changes, or major economic developments. For 409A valuations, the rate must reflect conditions as of the specific valuation date.

3. What is the difference between WACC and cost of equity at a discount rate?

WACC blends debt and equity costs to discount free cash flows to the firm (enterprise value). Cost of equity discounts cash flows to equity holders only. WACC is the standard choice for most business valuations.

4. Can I lower my company’s discount rate to get a higher valuation?

No. An artificially low rate inflates value on paper but will fail IRS audit review, Big 4 scrutiny, and legal challenges. The rate must accurately reflect investment risk – credibility always matters more than a flattering number.

5. How does the terminal growth rate affect the discount rate’s impact?

Significantly. Terminal value represents 60–80% of total business value, and a 0.5% change in growth rate can shift it by 8–15%. Conservative rates of 2–3% aligned with long-term GDP growth are essential for audit defensibility.

6. Why is the build-up method preferred for small private company valuations?

Small private companies lack publicly traded stock data needed for reliable CAPM betas. The build-up method stacks independently sourced risk components each documentable and defensible with published market data from sources like Kroll.

7. How do I justify a Company-Specific Risk Premium (CSRP) to auditors or the IRS?

Document each risk factor with quantitative evidence, customer concentration percentages, revenue stability metrics, SWOT analysis, and succession planning data. Tie each risk element to a specific premium supported by market evidence. Vague justifications will not survive scrutiny.

8. What is the Kroll recommended cost of capital inputs for 2026?

As of September 2025, Kroll recommends a U.S. ERP of 5.0% paired with the higher of a 3.5% normalized risk-free rate or the spot 20-year Treasury yield as of the valuation date. These inputs are updated periodically based on market conditions.

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