Discount Rates for SME Valuations: What Rate Should You Use in 2026?

Introduction

If you're valuing a small to medium-sized enterprise in Australia, the single most impactful assumption you'll make is the discount rate. A difference of 2% can swing the valuation by 30% or more.

Large listed companies have observable data: analysts publish their WACC assumptions, bond yields are transparent, and beta is calculable from stock price data. For SMEs, none of that exists. There's no stock price to calculate beta from, no analyst consensus on your cost of capital, and no liquid market for your debt.

This means the discount rate is an estimate. But it's not a guess. There are established methodologies, market guidance, and defensible ranges that a Chartered Accountant uses to arrive at a rate that will hold up under scrutiny.

This article covers what rates we're actually using in 2026 for Australian SME valuations, how we get there, and when to adjust up or down.

The Range: What We're Actually Using in 2026

Based on valuations conducted for Australian SMEs across construction, professional services, healthcare, manufacturing, and technology:

The centre of the range for a "typical" established Australian SME is 14-18%. This aligns with what we see from independent valuation reports prepared by other mid-tier firms.

For publicly listed companies on the ASX, the WACC typically sits between 8-12%. The difference (SME premium) reflects higher risk: customer concentration, key-person dependence, less diversified revenue, and limited access to capital markets.

The Build-Up Method: Step by Step

When there's no observable market data for a specific SME, the most common approach is the build-up method. Here's how it works for an Australian business in 2026:

Step 1: Risk-Free Rate

Start with the yield on 10-year Australian Government Bonds. As of early 2026, this is approximately 4.0-4.5%.

This is the closest thing to a "guaranteed" return in Australia. If you can earn 4% with zero risk, any equity investment needs to offer a premium above this rate.

Step 2: Equity Risk Premium (ERP)

The ERP is the additional return investors expect for investing in equities instead of risk-free government bonds. For the Australian market, the long-term ERP is estimated at 6.0-7.0%.

This premium is the same for all equities (small or large). It represents the systematic risk of being in the stock market versus bonds.

Risk-free rate + ERP = 10.0-11.5% (base cost of equity)

Step 3: Size Premium

Smaller companies are riskier than large ones. Academic research (Ibbotson, Duff & Phelps) shows that smaller capitalisation stocks have historically earned higher returns—implying higher costs of equity.

For an SME, the size premium is typically 4-7%. The smaller the business, the higher the premium within this range.

A business with $20M revenue and 100 staff might have a 4% size premium. A $500K revenue owner-operated business might have a 7% size premium.

Step 4: Industry Risk Premium

Some industries are inherently riskier than others:

Step 5: Company-Specific Risk

This is where professional judgment matters most. Adjustments for:

• Customer concentration: Single customer >30% of revenue? Add 1-2%.
• Key-person reliance: Business depends on one owner-operator? Add 1-3%.
• Revenue stability: Long-term contracts vs project-based revenue? Difference of 1-2%.
• Growth trajectory: High-growth businesses are riskier (uncertainty) but may also command higher exit multiples. This is nuanced.
• Financial leverage: Debt increases risk to equity holders.

Putting It Together

For a well-established construction business ($5M revenue, diversified contracts, stable management team):

For a professional services firm ($3M revenue, low capital intensity, diverse clients):

WACC vs Cost of Equity for SMEs

In theory, you should use WACC (Weighted Average Cost of Capital) which incorporates both the cost of equity and the after-tax cost of debt. For many SMEs, the distinction matters less than you'd think, because:

1. Many SMEs have minimal debt. A business with a clean balance sheet and no borrowings has a WACC essentially equal to its cost of equity.
2. SME debt is often personal. Director-guaranteed loans, overdrafts, and equipment finance don't represent the same capital structure as corporate debt.
3. Capital structure is often opportunistic. SMEs don't maintain a target debt-to-equity ratio—they borrow when they need to and repay when they can.

When debt is present, the WACC formula is:

WACC = (E/V × Re) + (D/V × Rd × (1-Tc))

Where:

• E/V = Equity weight (e.g., 70%)
• D/V = Debt weight (e.g., 30%)
• Re = Cost of equity (build-up method above)
• Rd = Cost of debt (current interest rate on borrowings, e.g., 8-12% for SME debt)
• Tc = Corporate tax rate (25% for Australian base-rate entities, 30% for others)

For a business with a 70/30 equity/debt split, the WACC might be:

WACC = (0.70 × 17%) + (0.30 × 10% × (1-0.25)) = 11.9% + 2.25% = 14.15%

The presence of debt reduces the discount rate because debt is cheaper than equity. But this doesn't mean the business is worth more—it means the value is being adjusted for the capital structure. The total value (enterprise value) is shared between debt holders and equity holders.

Common Mistakes We See

Using a single generic rate for all businesses. A 15% discount rate from one valuation doesn't apply to the next. The rate must reflect the specific business's risk profile, industry, size, and circumstances.

Using the CAPM beta from public companies. A construction company isn't a mini version of Boral. SME risk profiles differ systematically from listed companies. The build-up method is more appropriate.

Not updating the risk-free rate. If you used 3.5% in 2023 and the 10-year bond rate is now 4.5%, you're undervaluing the business by using a rate that's too low. The risk-free rate must be current as at the valuation date.

Ignoring company-specific risk entirely. Valuations that apply only a size premium without considering customer concentration, key-person dependence, or revenue stability miss half the picture.

Using a discount rate without documentation. The ATO and the courts expect to see a reasoned basis for the chosen rate. "We used 15% because that's what the industry uses" is not a defence. Show your build-up calculation, cite your sources for each component, and explain the company-specific adjustments.

How to Stress-Test Your Discount Rate

A good valuation tests the discount rate against market evidence:

• Compare to private transaction multiples. If businesses in your industry are trading at 4-5x EBITDA, what discount rate does that imply? (Hint: it's usually in the 15-20% range, consistent with the build-up method.)
• Run the discount rate backwards. If you use a 15% rate and the resulting enterprise value implies a multiple that's wildly different from recent transactions, either the rate or the cash flow forecast needs revisiting.
• Sensitivity tables. A standard valuation includes a sensitivity table showing enterprise value at ±2% and ±4% from the chosen rate. If a 2% change in discount rate doubles the value, you need strong justification for your rate selection.

The Relationship Between Discount Rates and Financial Models

The discount rate is applied to projected free cash flows. The quality of that projection directly affects how much the rate matters.

If your cash flow forecast is well-constructed—with clear assumptions, reasonable growth rates, and appropriate terminal value assumptions—the discount rate does its job of reflecting risk. If the cash flow forecast is unreliable, no discount rate will fix the valuation.

A clean, professionally-built Excel financial model gives your valuer the confidence to apply a standard discount rate without "loading up" the rate to compensate for poor projections. The better the model, the more precise the valuation.

The Bottom Line

Discount rates for Australian SMEs in 2026 sit in the 14-18% range for established businesses. The build-up method is the most defensible approach. Documentation of each component—risk-free rate, ERP, size premium, industry premium, company-specific adjustments—is essential.

The rate itself matters less than the reasoning behind it. A well-documented 17% rate will survive scrutiny. A 15% rate pulled from industry practice without a build-up won't.

Related Reading

• Business Valuation Methods: Complete Guide for Australian SMEs — choosing the right methodology
• Discounted Cash Flow Valuation: A Practical Walkthrough — how DCF works in practice
• How Much Does a Business Valuation Cost in Australia? — pricing guide for valuation services
• Business Valuation for SMEs: A Practical Excel Model — build a DCF model in Excel
• Cash Flow Forecasting for Growing SMEs — improving forecast quality for better valuations