ARPU
Also written Average Revenue Per User
Average revenue earned per subscriber over a period — the key top-line KPI analysts use to track telecom and other subscription businesses.
In plain language
A telecom company does not sell one product to many customers the way a factory does. It sells access, priced per subscriber.
So the number that matters most is not total revenue on its own — it is how much revenue each subscriber is worth. That is ARPU, and it tells you whether growth is coming from adding more subscribers or from getting more out of the ones already there.
How it works
The workbook lists ARPU as the lead metric analysts track for telecom and internet service providers, alongside subscriber churn rate, cost of subscriber acquisition and market share — because, as it explains, "a subscriber is considered as the unit of pricing" for this sector regardless of whether billing is per-call, per-data-use or a flat monthly rental. Chapter 7 makes the same point from the company-analysis side: each sector has its own defining metric — foot falls and same-store sales for retail, NII/NIM for banking, average room tariff for hotels, and ARPU for telecom.
A worked example
A telecom operator reports quarterly service revenue of Rs 30,000 crore and an average subscriber base of 40 crore.
Monthly ARPU = (30,000 crore ÷ 3 months) ÷ 40 crore subscribers
= 10,000 crore ÷ 40 crore
= Rs 250
A rival with Rs 24,500 crore of quarterly revenue and 35 crore subscribers works out to a monthly ARPU of (24,500 ÷ 3) ÷ 35 = Rs 233. Despite having fewer subscribers, the first operator is extracting more value from each one — a sign of a stronger premium subscriber mix, and typically the more important number to an analyst than raw subscriber count.
Why NISM asks about it
Chapter 6.7.3 (Telecommunication / Internet service providers KPIs) and Chapter 7.2 both use ARPU as the defining sector metric. Expect a question that gives revenue and subscriber figures and asks you to compute ARPU, or one that asks which metric best captures telecom performance.
Common exam traps
- A rising ARPU does not guarantee rising total revenue if the subscriber base is shrinking faster than ARPU is rising — always read ARPU alongside subscriber growth and churn, not on its own.
Check yourself
1.For a telecommunications service provider, what does the workbook treat as the unit of pricing, regardless of the billing model used?
- a)The number of calls and messages made
- b)The volume of data consumed
- c)The subscriber
- d)The number of towers operated
Show the answer
Answer: (c) The subscriber
The workbook notes that Indian operators once charged by calls, messages and data and now largely charge a fixed monthly rental — and then says that regardless of the billing model, from an analytical perspective a subscriber is considered as the unit of pricing. Companies grow their subscriber base and upsell to existing subscribers.
That is why the KPIs are subscriber-shaped: ARPU, subscriber churn rate, cost of subscriber acquisition and market share.
Options A and B describe historical billing models, not the analytical unit. Option D describes infrastructure, which is a cost item, not a pricing unit. The industry's stated constraint is the limited market size, since subscribers are capped by the population of the geography served — another reason the subscriber is the right unit.
2.What does the workbook say about the parameters used to justify valuations of new-age businesses such as e-commerce and technology companies?
- a)Eyeballs, page reviews, footfall, ARPU and number of users are reliable substitutes for profit
- b)Such parameters must ultimately translate into profits for owners at some point, and without visibility of that, valuations sustain only while there is a storyline and a next buyer
- c)These companies should always be valued using the dividend discount model
- d)Regulators prescribe the operating metrics that must be used for such companies
Show the answer
Answer: (b) Such parameters must ultimately translate into profits for owners at some point, and without visibility of that, valuations sustain only while there is a storyline and a next buyer
The workbook is candid. It admits it is difficult to put the numbers together to arrive at the valuations at which these transactions are happening, and calls that "our own limitation to understand the value proposition".
In the new-age economy people use parameters such as eyeballs, page reviews, footfall, ARPU and number of users to justify exorbitant valuations. But as Buffett would state, all of these should ultimately translate into profits for owners at some point in time. If there is no visibility of that happening, most of these valuations would sustain till there is a story line, people believe in those stories and the next buyer is available for the same — and would fall like a pack of cards in the absence of those.
The chapter points to the dot-com boom of 2000–2001 as the demonstration.
Option A takes the metrics at face value, which is exactly what the passage warns against. Option C is wrong twice over: these companies typically pay no dividend, and DDM cannot be used where no dividend is paid. Option D invents a regulatory requirement.
3.The workbook notes that each sector has its own unique parameters for evaluation. Which sector–parameter pairing is correct?
- a)Retail — Average Revenue Per User (ARPU)
- b)Hotels — footfalls and same store sales (SSS)
- c)Telecom — average room tariffs
- d)Banking — Net Interest Income (NII) / Net Interest Margin (NIM)
Show the answer
Answer: (d) Banking — Net Interest Income (NII) / Net Interest Margin (NIM)
The workbook gives four pairings in one sentence: "For the retail sector, foot falls and same store sales (SSS) are important parameters, whereas for banking it is Net Interest Income (NII)/ Net Interest Margin (NIM). For telecom, it is Average Revenue Per User (ARPU) and for hotels, it is average room tariffs."
Options A, B and C each take a real parameter and attach it to the wrong sector. ARPU belongs to telecom, footfalls and SSS to retail, and average room tariffs to hotels. Only banking–NII/NIM is correct.
The point behind the list: "Analysts must possess an in-depth knowledge of the sectors while researching companies." The same section says no analyst should go further "if he/she can’t address what a company does in a line with precision and clarity", and quotes Dr Gary Hamel: competition is "between the Business Models of the competing companies", not between products.
Where this is taught
Free preparation for NISM Series XVRelated terms
- Business modelHow a company actually makes money — what it sells, to whom, and how it delivers and prices it — which the workbook treats as the real basis of competition between companies.
- Business sectorA broad grouping of related industries serving similar economic functions — wider than a single industry but narrower than a whole economic sector such as agriculture or services.
- Customer concentration ratioThe share of a company's revenue earned from its largest customers — a high ratio signals dependence on a handful of clients who could walk away or squeeze pricing.