WACC, NPV and Company Valuation for the CISI SFCIV Exam

Table of Contents

• • Why WACC, NPV and valuation belong together
• • Building WACC correctly
• • When company WACC is not the project rate
• • Reading an NPV result
• • Linking discounted cash flow to company valuation
• • Enterprise value versus equity value
• • A revision method for calculation-heavy questions
• • Stay current for your exam date
• • Final takeaway

WACC, NPV and company valuation form the central calculation chain in the CISI Sources of Finance, Capital Investments and Valuations syllabus. Together, Cost of Capital, Capital Budgeting and Company Valuation contribute 22 of the 40 questions in the latest Version 2 examination specification.

Core idea: estimate a required return that matches the risk and financing basis of the cash flows, use it to discount those cash flows, and keep the valuation perspective consistent when moving between enterprise value and equity value.

Why WACC, NPV and valuation belong together

A company raises debt and equity because projects and operations need capital. Investors and lenders require returns for supplying that capital. Those required returns influence the discount rate used to appraise future cash flows. The present value of the cash flows then supports an investment decision or company valuation.

The logic is continuous:

1. identify the financing sources and their required returns;
2. determine consistent market-value weights;
3. assess whether the resulting WACC matches the asset or project risk;
4. forecast relevant cash flows;
5. discount them on the same enterprise or equity basis;
6. interpret the value and test its sensitivity.

Building WACC correctly

WACC combines the required return on equity with the applicable cost of debt. In practice, each input needs scrutiny.

The cost of equity may be estimated using a dividend-growth approach or CAPM. CAPM requires a risk-free rate, an equity beta and an equity market premium. The cost of debt should reflect the return currently required by debt investors rather than relying automatically on a historic coupon. Where the tax shield applies, the after-tax debt cost is used consistently.

Weights normally reflect relevant market values because valuation concerns current economic claims. Book weights may describe recorded financing but can fail to represent what investors currently require.

When company WACC is not the project rate

One of the most useful distinctions is between who funds the project and what risk the project creates. A low-risk company can invest in a high-risk activity, and a high-risk company can consider a lower-risk asset. The funding company’s existing WACC does not automatically become the correct opportunity cost.

A project-specific approach may use comparable-company betas. The analyst can remove the comparable’s financing effect to estimate asset risk, then introduce an appropriate target financing structure to obtain a project equity beta and required return. The aim is not mechanical complexity; it is risk consistency.

Reading an NPV result

NPV discounts relevant incremental project cash flows at an appropriate required return. A positive result indicates expected value creation under the assumptions; a negative result indicates that forecast returns do not compensate for the required return.

Common errors include:

• including sunk costs that will not change because of the decision;
• omitting opportunity costs;
• mixing nominal cash flows with a real discount rate;
• treating financing cash flows inconsistently with a WACC-based appraisal;
• using accounting profit instead of cash flow;
• ignoring working capital recovery or terminal cash flows.

IRR, MIRR, payback, discounted payback, ROCE and APV provide other views. The syllabus expects candidates to understand both calculations and limitations, including situations where ranking, financing or cash-flow patterns affect the conclusion.

Linking discounted cash flow to company valuation

Cash-flow valuation requires consistency between the cash flow and discount rate. Free cash flow to the firm is available to debt and equity providers and supports an enterprise-value approach, commonly discounted at WACC. Equity cash flow belongs to shareholders and requires an equity return.

The terminal value often represents a substantial share of total value. Growth, discount-rate and horizon assumptions therefore need to be reasonable and sensitivity-tested. A small change in WACC or long-term growth can materially alter the result; the output is better understood as a range supported by scenarios than as a perfectly precise answer.

Enterprise value versus equity value

Enterprise value and equity value answer different ownership questions. Enterprise value relates to the operating business and all capital providers. Equity value is the residual attributable to shareholders.

A simplified bridge commonly starts with enterprise value, deducts relevant debt and adds relevant cash. Real cases may require further justified adjustments for non-operating assets, leases, pension positions, minority interests or other claims. In the exam, identify the valuation basis first and then apply only the facts provided.

A revision method for calculation-heavy questions

Build one page for each method with five headings: purpose, inputs, calculation, interpretation and limitation. Then practise short integrated cases that move through the chain:

1. estimate the required return;
2. test whether it matches the risk;
3. select the relevant cash flows;
4. calculate present value;
5. reconcile enterprise and equity value;
6. explain sensitivity to the assumptions.

This method prepares you for questions that test judgement around the formula rather than arithmetic alone.

Stay current for your exam date

This guide was reviewed against the latest official syllabus available in 2026, Version 2, effective from 11 May 2026. Always verify the official SFCIV syllabus, the Diploma in Corporate Finance page and the Candidate Update page for your sitting.

The Sources of Finance, Capital Investments and Valuations preparation page now includes five timed 40-question mocks, seven chapter summaries, 148 flashcards, 108 searchable revision references and a source-grounded AI tutor.

Final takeaway

Do not memorise WACC, NPV and valuation as three unrelated topics. Follow the economic chain from capital providers to required returns, from required returns to risk-matched present values, and from enterprise value to the shareholders’ residual. That connected reasoning is both more useful in practice and better aligned with the Level 4 syllabus.