## Payback Period Method

The Payback Period is the time required to recover the original cash investment from the net cash inflows generated by the project.

> Formula (uniform cash flows):

> Payback Period = Initial Investment ÷ Annual Cash Inflow

> For uneven cash flows: cumulate annual inflows until they equal the initial outlay.

---

### Advantages

#	Advantage	Why It Matters
1	Easy to compute	Simple arithmetic; no discounting needed
2	Easy to understand	Gives an intuitive 'years to recover money' metric
3	Risk proxy	Longer payback = higher risk (long-term forecasts are less reliable)
4	Useful in cash-scarce or high-obsolescence industries	Short payback is critical in software or tech where products become obsolete quickly

---

### Disadvantages

#	Disadvantage	Implication
1	Ignores Time Value of Money (TVM)	₹1 received in Year 1 treated the same as ₹1 in Year 5
2	Ignores cash flows after payback period	A project generating huge returns post-payback gets no credit
3	Biased against long-term projects	Infrastructure, R&D, and capital-intensive projects are systematically undervalued

---

> Exam tip: Payback Period is a liquidity measure, not a profitability measure. Use it as a screening tool, not the sole decision criterion.

Worked example

### Example 1

Project X: Initial investment ₹5,00,000; annual cash inflow ₹1,00,000 → Payback = 5,00,000 ÷ 1,00,000 = 5 years. Project Y: Initial investment ₹5,00,000; cash inflows Year 1: ₹2,00,000, Year 2: ₹1,50,000, Year 3: ₹1,50,000 → Cumulative: 2,00,000 + 1,50,000 + 1,50,000 = 5,00,000 → Payback = 3 years. Under Payback, Y is preferred.

### Example 2

A startup in the wearable tech space evaluates two projects: Project A (medical device, 7-year payback) and Project B (smartwatch, 2-year payback). Given rapid obsolescence in wearables, Project B's short payback is a decisive advantage even if Project A has a higher NPV—illustrating the risk-proxy role of payback.

⚠️ Common exam mistakes

Confusing Payback Period with profitability—a project can have a short payback yet be unprofitable if cash flows collapse after recovery.
Using Payback as the sole criterion for project selection, especially for long-gestation projects like infrastructure or patents.
Forgetting that Payback ignores TVM—a project generating ₹50,000 in Year 1 vs. Year 5 would look identical under Payback but very different under NPV.
Miscalculating payback for uneven cash flows by dividing investment by average inflow instead of cumulating actual annual inflows.

Reference:

Now that you've read this — what's next?

Move from understanding → mastery in 3 clicks. Each option below picks up from this lesson's topic.

🔥 Drill 5 Qs on this → ✍️ Adaptive practice →

Payback Period Method — Merits and Demerits

Worked example

⚠️ Common exam mistakes