Live calculator
Model the shareholder return requirement before it flows into WACC or your DCF.
Input mode
Keep premiums explicit. If the base case already uses a conservative beta or ERP, avoid burying the same risk twice in additional adjustments.
Valuation Tool
CAPM Cost of Equity Calculator for Valuation and Board Decks
Calculate a defendable cost of equity using CAPM, layer in extra premiums when the case requires them, and turn the result into a cleaner DCF narrative, investment committee memo, or board-ready valuation slide.
Pure CAPM
11.65%
Adjusted cost of equity
12.15%
Beta contribution
7.25%
Added premiums
0.50%
Result
12.15%
This sits inside the typical growth saas / tech range, which makes it a credible starting point for DCF, IC, and board-level valuation discussion.
Pure CAPM
11.65%
ERP used
5.80%
Beta x ERP
7.25%
Extra premiums
0.50%
Board-ready takeaway
Use 12.15% as the working cost of equity for DCF support for a public software company discussing capital allocation and valuation sensitivity.. Pure CAPM contributes 11.65%, with 7.25% coming from beta x equity risk premium and 0.50% from added size, company-specific, and country risk layers.
Formula and calculation breakdown
Make the cost-of-equity logic easy to defend before it gets rolled into WACC.
Cost of equity = Rf + beta x ERP + size premium + company-specific premium + country risk premium
Base inputs
Risk-free rate = 4.40%
Beta = 1.25
ERP = 5.80%
CAPM core
Beta contribution = 1.25 x 5.80% = 7.25%
Pure CAPM = 4.40% + 7.25% = 11.65%
Implied market return = 10.20%
Additional premiums
Size premium = 0.00%
Company-specific premium = 0.50%
Country risk premium = 0.00%
Decision output
Adjusted cost of equity = 12.15%
Benchmark midpoint = 12.00%
ERP is being entered directly.
Practical ranges
Use these as pressure tests for the story, not as a substitute for company-specific judgment.
| Context | Typical range | Notes |
|---|---|---|
| Defensive / Regulated Business | 6% to 8% | Stable cash flows and lower beta usually compress the equity return requirement. |
| Large-Cap Corporate | 8% to 10% | A reasonable starting range for mature public companies with broad market exposure. |
| Growth SaaS / Tech | 10% to 14% | Higher sensitivity to growth, multiples, and execution risk often pushes equity cost upward. |
| Private Company / PE Case | 12% to 18% | Illiquidity, concentration, and sponsor underwriting often justify added premiums above pure CAPM. |
| Emerging Market Exposure | 11% to 16% | Country risk and execution friction usually widen the expected return range. |
Deck storyline
12.15% cost of equity sets the shareholder hurdle
Lead with the rate equity holders require, then explain whether the assumption reflects normal trading risk, sponsor underwriting, or a more conservative board posture.
Headline tile with base, downside, and upside rate
Deck storyline
7.25% comes from beta x market risk
Show the CAPM core clearly so the audience can separate market-linked risk from judgmental premium layers.
Bridge from risk-free rate to CAPM return
Deck storyline
0.50% of added premiums needs explicit justification
If you add size, company-specific, or country risk, say why. Boards and ICs will usually challenge these adjustments before anything else.
Premium stack table with rationale
Worked example
This example uses the default public SaaS preset loaded into the calculator.
Pure CAPM = 4.40% + 1.25 x 5.80% = 11.65%.
Additional premiums = 0.00% size + 0.50% company-specific + 0.00% country risk = 0.50%.
Adjusted cost of equity = 11.65% + 0.50% = 12.15%.
How business teams use this output
DCF valuation
Use cost of equity first to defend the shareholder hurdle rate, then flow it into WACC and valuation sensitivity tables.
Investment committee memos
Separate market-linked risk from judgmental premium layers so the committee can challenge each part of the return requirement cleanly.
Board capital allocation
Show whether management is underwriting a project or acquisition against a realistic equity hurdle instead of a generic corporate average.
Private-company valuation
Make additional risk layers visible when public-company CAPM alone does not fully capture illiquidity, concentration, or country exposure.
WACC Calculator
Roll the cost of equity into debt mix and tax shield assumptions.
EBITDA Multiple Valuation Calculator
Pair discount-rate logic with a comps-based valuation view.
Private Equity Investment Thesis Template
Package the rate, valuation case, and underwriting logic in an IC-style deck.
M&A Due Diligence Report Template
Use the return requirement inside a broader diligence and valuation narrative.
Common mistakes
Using a beta from an incomparable peer set and then presenting the result as precise rather than directional.
Quoting one cost of equity with no sensitivity range even though the beta and ERP debate is usually the core valuation issue.
Ignoring size, concentration, illiquidity, or country risk when the case is a private or emerging-market asset.
Mixing a public-company CAPM output with a board narrative that actually assumes sponsor-style or project-specific risk.
Frequently asked questions
What does a CAPM calculator estimate?
It estimates the cost of equity, or the return common shareholders require to fund the business, using the risk-free rate, beta, and equity risk premium.
Why would I add extra premiums on top of CAPM?
Teams often layer size, company-specific, or country risk premiums when a small private company, concentrated business, or emerging-market case is not fully captured by a public beta alone.
Should I input market return or equity risk premium?
Use whichever you already defend in your model. If your team anchors on expected market return, the calculator derives the premium. If you already use an ERP assumption, enter that directly.
Is CAPM enough for every valuation?
No. CAPM is a practical baseline, not a substitute for judgment. Analysts often pressure-test beta selection, add premiums, and run sensitivity ranges before using the result in an IC memo or board deck.
How is this different from the WACC calculator?
This page isolates the cost of equity decision so you can defend the shareholder return requirement first. The WACC calculator then combines that output with debt cost and capital structure.
Turn the rate into an executive-ready valuation story
Use the calculator first, then generate a board or IC slide that explains the rate, the premium logic, and the assumptions a CFO, investment committee, or board member will challenge first.