Colombo · Markets · MoneyPick up almost any phone in Sri Lanka and there is a good chance it is running on Dialog's network. It is the kind of company whose product is woven into daily life, yet few of its users have ever stopped to ask how it actually makes money. Understanding that is a great lesson in how a modern, recurring-revenue business works, and where its weak points hide. As always, this is a framework for thinking, not a recommendation.
The business in one line: a telecom collects millions of small, regular payments for connectivity. That makes revenue remarkably predictable, but the network behind it costs an enormous, never-ending amount of money to build and maintain. The whole story is the tension between those two facts.
The recurring-revenue engine
Dialog's strength is recurring revenue. Whether prepaid reloads or postpaid bills, millions of customers pay every month for calls, data, and services. A business built on many small, repeated payments is far more stable than one that must win a new sale each time, and it is why investors prize telecoms for their predictability.
The key number professionals watch is ARPU, average revenue per user. Growth comes from two places: adding subscribers, and getting each one to spend more (mainly on data). In a market as penetrated as Sri Lanka's, squeezing more value from existing users matters as much as signing up new ones.
Scale as a moat
Telecom rewards size. Dialog is the largest mobile operator in the country, and its 2024 amalgamation with Airtel Lanka widened its lead over rivals SLT-Mobitel and Hutch. Scale is a genuine competitive moat here: the widest coverage, the most spectrum, and the biggest subscriber base are extremely hard and expensive for a challenger to replicate.
In telecom, the network is the moat. You cannot casually build thousands of towers and buy spectrum to compete; the incumbent's head start is measured in decades and billions.
The costs: capex and spectrum
Here is the catch. That network demands relentless capital spending, towers, fibre, equipment, and each new generation of technology (4G, 5G) means another huge investment. Spectrum, the airwaves themselves, must be licensed from the state at high cost. A telecom can look highly profitable on paper while much of its cash is being poured straight back into the ground to stay competitive.
This is why you always weigh a telecom's earnings against its capital spending and debt. Profit that is entirely consumed by capex is not the same as cash in shareholders' pockets.
From voice to data to digital
The business has shifted under our feet. Revenue from voice calls has given way to data, home broadband, pay-TV, and a push into digital services and financial technology. The winners in the next decade will be the operators that turn a pipe for data into a platform for services, capturing more of each customer's digital life.
The risks to weigh
No moat is absolute. Watch for:
- Price competition that erodes ARPU when rivals discount aggressively.
- Taxes and regulation, telecom is a favourite target for government levies.
- Currency, because network equipment is imported and paid for in dollars, a weaker rupee raises costs.
- Heavy, unavoidable capex and the debt often taken to fund it.
How to look at a telecom
- Prize the recurring revenue and track ARPU and subscriber trends.
- Respect scale as a real moat, but never ignore the cost of building it.
- Always weigh profit against capex and debt.
- Look for the shift into data and digital services as the growth story.
- Get the current figures yourself from the annual report.