Lesson 29 of 33 · Free
Contents
- 1 Evaluating Business Investments
- 1.1 Capital budgeting — the multi-crore question
- 1.2 Start with the cash flows
- 1.3 1. Net Present Value (NPV)
- 1.4 2. Internal Rate of Return (IRR)
- 1.5 3. Payback Period
- 1.6 Worked example
- 1.7 Sensitivity analysis
- 1.8 Lesson recap
- 1.9 Practical Indian Application
- 1.10 Worked Example (in Rupees)
- 1.11 Frequently Asked Questions
- 1.12 Practitioner Insights
- 1.13 Detailed Worked Scenario
- 1.14 More FAQs
- 1.15 Real Options & Scenario Planning in Capital Allocation
Evaluating Business Investments
NPV, IRR, Payback — three techniques every CFO uses to evaluate multi-crore decisions. Plus sensitivity analysis to stress-test your assumptions.
Capital budgeting — the multi-crore question
Should we buy that ₹10 crore machine? Should we acquire that competitor? Should we open a new branch? These decisions tie up capital for years and can make or break a company. Capital budgeting is the discipline of evaluating whether a long-term investment will create value.
Three techniques dominate: Net Present Value (NPV), Internal Rate of Return (IRR), and Payback Period. They overlap but answer subtly different questions.
Start with the cash flows
Every investment evaluation starts with a forecast of incremental cash flows:
- Year 0 — Initial investment. Equipment cost, installation, working-capital injection. Always a cash outflow.
- Years 1-N — Operating cash flows. Incremental revenue minus incremental cash operating costs minus incremental tax. Note: cash, not accounting profit.
- Year N — Terminal value. Salvage value of equipment, recovery of working capital, or perpetuity value if the project continues forever.
“Incremental” is key. Include only cash flows that exist because of the investment. Ignore sunk costs (already spent), but include opportunity costs (what the resource could otherwise have earned).
1. Net Present Value (NPV)
Discount each year’s cash flow back to today using the company’s cost of capital. Sum them. Subtract the initial investment. If positive, the project creates value.
Where r is the discount rate (usually the weighted-average cost of capital, WACC).
Decision rule: Accept if NPV > 0. Among mutually exclusive projects, pick the highest NPV.
Why it’s the gold standard: NPV is in money terms (rupees), accounts for time value, accounts for risk via the discount rate, and is additive across projects.
2. Internal Rate of Return (IRR)
The discount rate that makes NPV exactly zero. Effectively the project’s break-even return.
Decision rule: Accept if IRR > Cost of capital.
Intuition: If a project’s IRR is 18% and your cost of capital is 12%, the project clears the hurdle by 6 percentage points.
Watch outs:
- IRR can produce multiple solutions if cash flows change sign more than once.
- Reinvestment assumption — IRR assumes interim cash flows are reinvested at IRR, which is often unrealistic.
- For mutually exclusive projects of different sizes, IRR can rank wrongly. Always cross-check with NPV.
3. Payback Period
How many years until cumulative cash inflows recover the initial outlay? Simplest of the three.
Decision rule: Accept if payback < a maximum acceptable period (often 3-5 years).
Strengths: Quick, intuitive, useful for liquidity-constrained businesses.
Weaknesses: Ignores cash flows beyond the payback date; ignores time value of money. A project that takes 4 years to recover ₹1 cr then earns ₹50 lakh/year forever would lose to one that recovers in 2 years and then dies — by payback alone.
Variation: Discounted Payback — counts discounted cash flows. Fixes the time-value issue but still ignores post-payback flows.
Worked example
Project: invest ₹10,00,000 in new equipment. Expected cash flows:
| Year | Cash flow (₹) | Discount factor @ 12% | PV (₹) |
|---|---|---|---|
| 0 | (10,00,000) | 1.000 | (10,00,000) |
| 1 | 3,50,000 | 0.893 | 3,12,550 |
| 2 | 3,50,000 | 0.797 | 2,78,950 |
| 3 | 3,50,000 | 0.712 | 2,49,200 |
| 4 | 3,50,000 | 0.636 | 2,22,600 |
| NPV | +63,300 | ||
NPV is positive → accept. IRR works out to roughly 14.6% (above 12% hurdle). Simple payback is 2.86 years (10,00,000 / 3,50,000). All three signals align.
Sensitivity analysis
Real cash flows are forecasts — they’re wrong on day one. Stress-test:
- What if revenue is 20% lower? NPV?
- What if the discount rate is 15% instead of 12%?
- What if the project life is 3 years instead of 4?
If small changes flip the decision from accept to reject, the project is fragile and needs deeper risk analysis.
Lesson recap
- Start with incremental cash flows, not accounting profit.
- NPV is the gold standard — accept if positive.
- IRR is intuitive but has known limitations; cross-check with NPV.
- Payback is simple but ignores time value and post-payback cash flows.
- Always run sensitivity analysis on key drivers.
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Practical Indian Application
Evaluating business investments — capex, acquisitions, new products — is the discipline of comparing future expected cash flows against required investment. Classical techniques include Payback Period, Discounted Payback, Net Present Value (NPV), Internal Rate of Return (IRR), Profitability Index and Accounting Rate of Return. Indian companies use these alongside qualitative filters such as strategic fit, regulatory feasibility, ESG impact and management bandwidth. The discount rate is usually the firm’s Weighted Average Cost of Capital (WACC) — a function of debt cost, equity cost (CAPM), and capital structure. SEBI’s Related Party Transaction approval framework adds governance overlay. The Companies Act prescribes board approval for material investments and shareholder approval beyond specific thresholds under Section 180.
Worked Example (in Rupees)
Imagine Aqua Filters, Pune, evaluates a ₹2 crore investment in a new RO assembly line, expected to generate ₹70 lakh cash flow annually for 5 years and ₹10 lakh salvage. WACC = 12%. NPV = − 2,00,00,000 + 70,00,000 × [1−(1.12)^−5]/0.12 + 10,00,000/(1.12)^5 = −2,00,00,000 + 2,52,30,000 + 5,67,000 = ₹57.97 lakh positive — accept the project. IRR is found where NPV = 0; here IRR ≈ 24%, comfortably above the 12% hurdle. Payback period = 2,00/70 = 2.86 years, well within the 5-year horizon. All three methods agree: the project creates value.
Frequently Asked Questions
Why is NPV preferred over Payback?
NPV considers all future cash flows and the time value of money; Payback ignores cash flows beyond the payback period and ignores discounting.
How is WACC calculated for an unlisted Indian firm?
Cost of debt is the after-tax interest rate on borrowings; cost of equity uses CAPM with a beta from listed comparable companies (proxy approach).
What if NPV is positive but the project is strategically misaligned?
NPV is a financial test, not the only test. Boards override positive NPV when projects breach strategy, capacity or ESG criteria.
Should Indian start-ups use these techniques?
Yes, particularly for unit-level decisions like a new warehouse, a city-launch, or a new manufacturing line. Pure cash-burn early-stage start-ups blend NPV with optionality-based VC frameworks.
Practitioner Insights
Indian boards apply NPV/IRR alongside qualitative filters such as strategic fit, environmental impact, regulatory approvals (CCI for M&A, SEBI for related-party deals), labour relations and ESG considerations. SEBI’s Related Party Transaction framework under LODR Regulation 23 requires audit committee and shareholder approval beyond ₹1,000 cr or 10% of consolidated turnover. Indian acquisitions also consider tax structuring — slump sale vs share purchase, holding-co location, GST migration costs. Capex above ₹500 cr typically requires board capex committee approval, IRR ≥ WACC + 300-500 bps risk premium.
Detailed Worked Scenario
Suppose ABC Chemicals evaluates a ₹50 cr capex for a new specialty chemical plant. Expected cash flows: Year 1 ₹12 cr, Year 2 ₹15 cr, Year 3 ₹18 cr, Year 4 ₹18 cr, Year 5 ₹18 cr + ₹5 cr salvage. WACC = 13%. NPV calculation: PV of inflows = 12/(1.13) + 15/(1.13)^2 + 18/(1.13)^3 + 18/(1.13)^4 + 23/(1.13)^5 = 10.62 + 11.74 + 12.47 + 11.04 + 12.49 = ₹58.36 cr. NPV = 58.36 − 50 = ₹8.36 cr positive. IRR ≈ 19%, beating WACC by 600 bps. Payback period ≈ 3.3 years. All three checks pass; the project proceeds, subject to CCI clearance if it qualifies as a combination.
More FAQs
Why use WACC as the discount rate?
WACC represents the blended cost of capital — debt and equity combined. A project must earn at least WACC to create shareholder value.
How is sensitivity analysis done?
Vary key inputs (revenue, cost, discount rate) by ±10-20% and observe the impact on NPV. The factor with the highest NPV sensitivity is the riskiest.
What is the difference between IRR and MIRR?
IRR assumes intermediate cash flows are reinvested at the IRR rate; MIRR (Modified IRR) assumes they are reinvested at the firm’s WACC — a more realistic assumption.
Real Options & Scenario Planning in Capital Allocation
NPV is necessary but not sufficient for high-uncertainty projects. Real options analysis treats managerial flexibility as a financial option — the option to delay, expand, contract, or abandon a project has value. Indian pharma firms use real options to value early-stage drug pipelines; renewable energy developers use them to value land-bank rights; auto OEMs use them to phase capacity additions. Tools include Black-Scholes adaptations and decision-tree analysis with probability-weighted NPVs.
Scenario planning models 3-5 plausible futures (base, bull, bear, stress) with different revenue, cost and discount-rate assumptions. The NPV under each scenario is computed and risk-weighted. SEBI’s Climate-related Risk Disclosure (BRSR Core) requires listed companies to model climate scenarios — a regulatory push for scenario-based decision-making.