5G upside, currency risk
- Turkcell's core engine is Turkey telecom, which produced about 91% of 2025 external revenue.
- The company added 2.4 million postpaid mobile users in 2025, its best yearly result in 26 years.
- 5G went live nationwide on March 31, 2026, after Turkcell won 160 MHz of new spectrum.
- The Google Cloud plan could lift data centers, where Turkcell already has 50 MW of active capacity.
- The big near-term worry is a $957 million short U.S. dollar position during a weaker Turkish macro setup.
Strong customers, risky funding
Turkcell is doing a lot right in its main business. It pushed more customers into postpaid plans, which tend to be stickier and higher value than prepaid plans. In 2025, it added 2.4 million postpaid mobile users, the strongest yearly result in 26 years. Real ARPU, which means average revenue per user after inflation, still grew 5.4%.
The next growth leg is infrastructure. Turkcell launched 5G nationwide on March 31, 2026. It also has a Google Cloud partnership to build a hyperscale cloud region in Turkey, on top of 50 MW of active data center capacity. If companies need local cloud, data storage, AI, and cyber security, Turkcell can sell more than phone plans.
The bear case is not about demand. It is about cost and balance sheet risk. Management guided 2026 EBITDA margin to 40% to 42%, below 43.1% in 2025, because wages rose above inflation and 5G needs heavy launch marketing. The company also held about a $957 million short U.S. dollar position to earn high Turkish lira yields. That can help when the lira is stable, but it can hurt fast if the currency breaks.
Bills, bundles, towers, cloud
Turkcell makes most of its money by selling mobile and fixed communication services in Turkey. Customers pay for voice, data, broadband, IPTV, and related digital services. The best customers are postpaid mobile users and fiber users because they usually pay more and churn less.
Pricing is central to the model. Turkey has had very high inflation, so Turkcell raises prices often and uses customer data to make targeted offers. This has helped it keep real ARPU growth positive, but it also tests how much customers can take before they trade down or leave.
The company also earns from digital business services, data center and cloud, payments, consumer finance, and tower leases to rivals. These areas add growth options, but some require large upfront spending. 5G spectrum, fiber, cloud regions, and data centers all need capital before the full revenue shows up.
What Turkcell sells
Mobile service
This is the heart of the business. Turkcell ended 2025 with 31.5 million postpaid mobile subscribers and 7.6 million prepaid mobile subscribers in Turkey.
Fixed broadband and IPTV
Turkcell sells fiber, resold fixed broadband, Superbox fixed wireless access, and IPTV. Its own fiber base reached about 2.6 million customers at the end of 2025.
Digital services
Consumer apps include TV+, fizy, lifebox, BiP, and GAME+. These help bundle more value into telecom plans and keep users inside the Turkcell ecosystem.
Digital business services
This unit sells connectivity, cyber security, system integration, cloud, data center, IoT, and managed services to companies. Digital Business Services revenue reached TRY 22,759.1 million in 2025, up 24.7% from 2024.
Data center and cloud
Turkcell runs 32 data centers, including four new-generation centers with 50 MW of active IT power capacity. The Google Cloud region is expected to become operational around 2028 to 2029.
Techfin
Paycell handles payments and Financell provides consumer financing. Techfin is smaller than telecom, but it grew faster than the core in 2025.
Tower infrastructure
Turkcell owns tower assets and leases capacity to other operators. This turns parts of the network into a rental business.
Mostly Turkey telecom
Segment mix is based on 2025 external customer revenue from the 2025 Form 20-F. Turkcell Turkey dominates the mix, so results still depend heavily on Turkish consumers, companies, inflation, and the lira.
What could go wrong
Lira shock hits the short dollar bet
High impact · Medium oddsTurkcell held about a $957 million short U.S. dollar position at the end of 2025 to benefit from high Turkish lira yields. That trade can add income when the lira is stable. It can also create losses if the lira drops quickly, especially after the March 2026 U.S.-Iran shock hurt emerging market risk appetite.
5G costs arrive before 5G revenue
High impact · High oddsTurkcell won 160 MHz of new 5G spectrum and launched 5G nationwide on March 31, 2026. The service should help data usage and premium plans, but the early phase brings marketing, sales, and network costs. Management's 2026 EBITDA margin guidance of 40% to 42% already points below the 43.1% margin in 2025.
Price hikes push customers away
Medium impact · Medium oddsTurkcell has used frequent price increases to keep ARPU ahead of inflation. That has worked so far, but Turkish households still face pressure from high prices and high interest rates. If users trade down or leave, the postpaid win could fade.
Cloud buildout takes longer than planned
Medium impact · Medium oddsThe Google Cloud partnership is a major long-term growth plan. Turkcell says the region is expected around 2028 to 2029 and plans USD 1 billion of investment by the end of 2032. Delays, cost overruns, or weak corporate IT demand would lower the payoff.
More competition or regulation
Medium impact · Medium oddsTurkey already has intense local telecom competition, with Turk Telekom and Vodafone as major rivals. Rumors around Turksat entering as a fourth mobile operator could create headline risk even if management doubts near-term feasibility. Telecom taxes and fees are also heavy, including treasury share, ICTA fees, and service taxes.
TOGG stake keeps losing money
Low impact · Medium oddsTurkcell owns a 23% stake in the TOGG electric vehicle project. The investment has produced near-term losses, including a TRY 1.2 billion loss in Q2 2025. It is not the main business, but it can still drag reported profit.
In one breath
What does Turkcell do?
Turkcell sells mobile, fiber broadband, IPTV, digital services, cloud, data center, payment, and financing services. Most revenue comes from Turkey telecom customers.
Why does 5G matter for Turkcell?
5G gives Turkcell more network capacity and a chance to sell premium data plans, fixed wireless access, IoT, and business services. The risk is that the costs show up before the revenue ramps.
What is the main risk for TKC stock?
The biggest specific risk is currency exposure. Turkcell built a short U.S. dollar position of about $957 million while Turkey faced renewed geopolitical and macro pressure in 2026.
Is Turkcell a cloud company now?
Not mainly. Telecom is still the core, but data center and cloud are becoming more important, especially after the Google Cloud partnership.