Advanced Info Service Additional Discussion Report: SSC Discussion Credit Monitoring Items

• Report date: 2026-05-29
• Issuer / Theme: Advanced Info Service Public Company Limited / discussion credit monitoring items
• Report type: additional_discussion
• Discussion scope: To organise the discussion dated 2026-05-28 into forward-looking credit monitoring items, taking into account the existing issuer_summary and issuer_flash.
• Reference context: advanced_info_service_issuer_summary_20260513.md, advanced_info_service_issuer_flash_q1_2026_results_20260520.md, discussion dated 2026-05-28

1. Purpose and Treatment

This report organises the discussion on Advanced Info Service Public Company Limited (AIS) as supplementary material to the existing reports. It is not an investment decision, a rating decision, or the outcome of verification of new primary information. The discussion includes explanations based on external web checks, but this report does not treat them as verified new facts. They are instead treated as “discussion claims” or “items requiring further confirmation”.

The context already confirmed in existing reports consists of the issuer_summary dated 2026-05-13 and the 1Q26 issuer_flash dated 2026-05-20. Those reports set out that AIS is a leading telecom operator in Thailand, with a revenue base in mobile and FBB, a 1Q26 EBITDA margin of 55.3%, a service EBITDA margin of 68.5%, operating cash flow, low ordinary net debt/EBITDA, and net debt/EBITDA including leases and spectrum of 1.5x. At the same time, they identify dividends, CAPEX, spectrum payments, 3BB integration, the GSA data centre, virtual banking, and US dollar bond terms as areas requiring ongoing monitoring.

The current discussion is not positioned as a new results review intended to change that existing view. Rather, it is a deeper discussion of “which indicators would need to deteriorate before the assumption that AIS should be viewed as a low-leverage telecom operator needs to be made more cautious”. The focus is not simply the strength of operating cash flow itself, but FCF remaining for creditors after shareholder returns, effective leverage including leases and spectrum, and early-warning lines if competition, regulation, and adjacent investments take effect at the same time.

2. Reading from the Discussion

The overall reading from the discussion is that AIS’s current credit profile remains strong, but that this strength should not be assessed mainly through ordinary net debt/EBITDA alone. As confirmed in the existing reports, AIS has a strong business base in mobile and FBB, and effective leverage as of 1Q26 is also low. However, spectrum, network CAPEX, leases, dividends, 3BB integration, data centre and virtual-bank investments, which are difficult for a telecom operator to avoid, are proceeding in parallel. Deterioration may therefore appear first in post-dividend FCF and effective fixed-charge burden metrics before it appears in the income statement.

The discussion hypothesis is that AIS’s main downside would not arise from a single large event, but from several medium-sized burdens overlapping in the same period. Examples include a halt in mobile/FBB ARPU improvement, higher promotional and retention costs due to competition with TRUE, remaining fixed-line CAPEX and content costs associated with FBB integration, increased spectrum payments, and an insufficient reduction in the payout ratio. Under this combination, EBITDA could still appear strong, while post-dividend FCF becomes thin and net debt/EBITDA including leases and spectrum moves towards 2.0x.

At the same time, the current discussion alone does not support the conclusion that AIS has already entered such a phase. The existing issuer_flash assessed 1Q26 performance as mildly positive, with the credit view stable to broadly unchanged. The focus of this report is therefore not to change the conclusion, but to retain the key questions that should not be missed in subsequent updates.

3. Summary of Q&A Content

3.1 Can AIS Absorb Dividends, CAPEX, Spectrum and Adjacent Investments at the Same Time?

Question intent. The first question asked whether AIS can absorb 3BB integration, 5G and fixed-line CAPEX, spectrum payments, adjacent investments such as data centres and virtual banking, and a minimum 70% dividend policy, while maintaining strong operating cash flow from mobile/FBB. The intent was not simply to ask whether near-term leverage is low, but to distinguish between a base case in which credit headroom remains even while dividends are maintained, and a stress case in which dividends, investment and fixed burdens begin to erode financial flexibility.

Key points of the response. The discussion response stated that AIS can currently be treated as a low-leverage telecom operator, but that the judgement should be anchored not in ordinary net debt/EBITDA, but in post-dividend FCF, net debt/EBITDA including leases and spectrum, and the simultaneous burden of short-term debt, spectrum payments and CAPEX. The 1Q26 metrics confirmed in the existing reports are strong, and AIS has capacity to absorb ordinary investment, spectrum payments and minimum dividends. However, the cash balance at end-March 2026 may include the benefit of US dollar bond issuance and pre-dividend liquidity, and should not be viewed simplistically as a permanent liquidity cushion.

Points explored in the follow-up. On dividend discipline, the discussion stated that AIS’s dividend policy is not a completely fixed minimum 70% commitment, but is designed to take into account performance, cash flow, investment plans and financial soundness. However, this is a reading of the company’s disclosed policy, and it remains unconfirmed whether AIS would actually lower ordinary dividends towards around 70% or restrain special dividends in a stress scenario. The extent to which major shareholders’ expectations for returns could become a constraint also remained an item for further confirmation in the discussion.

Credit implication. The condition for continuing to view AIS as a “low-leverage telecom operator” is that post-dividend FCF remains positive and net debt/EBITDA including leases and spectrum does not rise materially from around 1.5x. Conversely, if post-dividend FCF falls to around zero or turns negative, effective leverage rises towards 2.0x at the same time, and a high payout ratio or special dividends continue, the view should become more cautious, shifting towards “a highly profitable telecom platform with heavy investment, dividend and fixed-charge burdens”.

3.2 Where Should a Re-escalation of Competition with TRUE Be Identified?

Question intent. The next set of questions asked how far the two-player oligopoly between AIS and TRUE can be used as a stable assumption. In particular, if pricing competition, promotional expenses, handset subsidies and churn rise again in mobile and FBB, the aim was to distinguish between temporary competitive intensification and a structural change that would erode AIS’s high-margin profile and rating headroom.

Key points of the response. The discussion response stated that the current competitive environment is close to a stable two-player oligopoly, but that it should not be assumed that “oligopoly automatically means high margins will continue”. Waiting for deterioration in AIS’s own ARPU and churn may be too late; TRUE’s net subscriber additions, promotional and retention measures, FBB bundling, and EBITDA margin should be monitored as early indicators.

Points explored in the follow-up. The additional question asked when the scenario should shift from stable oligopoly to competitive deterioration if TRUE is confirmed to be sacrificing profitability in order to gain share. The discussion response stated that TRUE’s net subscriber additions alone are insufficient. The focus should be on whether TRUE’s service revenue or ARPU fails to grow while promotional and retention costs increase and EBITDA margin declines for at least two quarters. It is also necessary to confirm whether this trend spills over into AIS’s ARPU, churn, promotional costs, handset subsidies, EBITDA margin and post-dividend FCF.

Credit implication. Competition risk does not necessarily start with a decline in AIS’s revenue. TRUE could first weaken price discipline and affect AIS’s margins by forcing it to increase defensive promotional and retention spending. Therefore, even if AIS’s standalone performance remains solid, TRUE’s net additions, ARPU, promotional costs and EBITDA margin should be treated as leading indicators of competition risk.

3.3 Is 3BB Integration and FBB Expansion a Diversification Benefit or an Increase in Fixed Burdens?

Question intent. For 3BB integration and FBB expansion, the question was whether they should be assessed as diversification benefits that reduce reliance on mobile, or as factors that increase medium-term fixed burdens and margin pressure through fixed-line CAPEX, integration costs, content costs and FBB price competition. The intent was to monitor not only subscriber numbers and market share gains, but also ARPU, churn, integration synergies and FCF conversion.

Key points of the response. The discussion response assessed the current 3BB integration as net positive. The existing reports also confirm growth in FBB subscribers, FBB revenue and FBB ARPU, which can reduce reliance on mobile and support customer lock-in through combinations of mobile, FBB, content and enterprise services. However, FBB is more likely than mobile to involve fixed-line investment, installation and maintenance costs, content costs, price competition and integration execution risk.

Points explored in the follow-up. The additional question asked how to confirm whether AIS is moving from a phase focused on “subscriber and market share expansion” to a phase focused on “ARPU, churn, integration synergies and FCF conversion”. The discussion response stated that even if FBB subscribers increase, if FBB ARPU or revenue per subscriber declines for two to three consecutive quarters, while group EBITDA margin falls below 53% or post-dividend FCF becomes thin, 3BB integration should be reassessed as an increase in fixed burdens rather than a diversification benefit.

Credit implication. Subscriber growth alone is not a sufficient credit-positive condition for 3BB integration. It is necessary to confirm whether FBB is becoming a structure that absorbs the high-profit cash flow from mobile, using FBB ARPU, churn, integration synergies, FBB-related CAPEX, content costs, group EBITDA margin and post-dividend FCF.

3.4 Are Data Centres, Cloud and Virtual Banking Growth Options or Support Risks?

Question intent. The questions on adjacent businesses asked whether data centres, cloud and virtual banking should be viewed as low-risk growth options that leverage the customer base of the core telecom business, or as event risks with different risk profiles, capital recovery periods and competitive environments from the telecom core. The discussion also asked whether AIS could end up playing a greater-than-expected support role through its relationships with GULF, Singtel, KTB and OR.

Key points of the response. The discussion response stated that data centres and cloud have strategic fit with telecom assets and that the JV structure provides some risk sharing, so they can be evaluated as low- to medium-risk growth options. However, it is too early to treat them as low-risk peripheral telecom revenues. For virtual banking, the response noted potential to use the telecom customer base, but said that greater caution is required because the risks differ from those of telecom operations, including credit risk, regulatory capital, start-up losses, deposit acquisition and credit costs.

Points explored in the follow-up. The additional question asked whether, even if AIS’s equity stake is limited, the strategic importance of the businesses could create support expectations beyond AIS’s ownership percentage. The discussion presents external checks relating to GSA, GSA05, CLICX and the virtual bank licence, but this report treats those items as unverified additional context. The practical credit point is whether AIS itself has explicit guarantees, support letters, long-term capacity usage contracts, take-or-pay obligations, customer-referral obligations, loss-compensation obligations or additional capital commitments. The discussion also treated these items as not yet confirmed and requiring further confirmation.

Credit implication. The risk of adjacent businesses cannot be measured solely by the accounting ownership percentage. If AIS remains a minority investor, these businesses can be treated as growth options that are absorbable within current credit headroom. By contrast, if additional equity injections, guarantees, long-term contracts or loss absorption are repeated before EBITDA contribution is established and begin to pressure post-dividend FCF, the adjacent businesses would become event risks that consume the credit headroom of the telecom core.

3.5 Are Regulation and Spectrum Policy Manageable?

Question intent. The questions on regulation and spectrum asked how far Thai regulation, spectrum policy and government intervention can be viewed as stabilising factors. The key issue was which future events would most affect AIS’s FCF, investment burden, pricing power and rating headroom if spectrum reorganisation or additional auctions, price regulation, consumer protection, MVNO promotion, or competition policy towards the two-player oligopoly were to change.

Key points of the response. The discussion response stated that the current regulatory and spectrum policy environment is manageable, but cannot be described as an actively stabilising factor. AIS’s high-FCF model depends on the combination of predictable spectrum payments, continuing ARPU improvement under the two-player oligopoly, and the NBTC not intervening excessively in pricing, MVNOs or wholesale access. The effective leverage and operating cash flow confirmed in the existing reports are strong, but spectrum payments and regulatory costs are structural burdens for a telecom operator.

Points explored in the follow-up. The additional question focused on the most concerning combination: additional spectrum burden occurring at the same time as limits on price pass-through. The discussion response stated that the indicators to monitor before revenue itself are a halt in ARPU improvement, a decline in EBITDA margin, and a contraction in FCF after CAPEX and spectrum payments. In particular, if investment and spectrum payments increase while ARPU does not grow after a change in NBTC policy, the assumption that AIS is a telecom operator capable of maintaining high FCF even under regulation would need to be revisited.

Credit implication. A temporary increase in regulatory costs should be distinguished from impairment of the high-FCF model. If spectrum payments increase but the payment period is long, ARPU improvement and EBITDA margin are maintained, and post-dividend FCF remains positive, AIS should be able to absorb the burden. Conversely, if additional spectrum burden, limits on price pass-through, a halt in ARPU improvement, a break below the 53-54% EBITDA margin range, contraction in FCF after CAPEX and spectrum payments, and effective leverage approaching 2.0x occur together, the issue should be treated not as a regulatory cost but as deterioration of the model.

4. Continuing Follow-up Items and Warning Lines

5. Candidate Items for Transfer to issuer_notes.md

In this additional_discussion, issuer_notes.md is not updated in line with the user’s instruction. However, the following items should be considered for transfer to “follow-up on management strategy, investment plans and financial policy” in future ordinary updates.

• Although AIS has strong operating CF, continue monitoring the simultaneous burden of dividends, CAPEX and spectrum payments, using post-dividend FCF and leverage including leases and spectrum as the main indicators.
• Continue monitoring TRUE’s net additions, ARPU, promotional expenses and EBITDA margin as leading indicators of competition risk for AIS.
• Assess 3BB integration not by subscriber numbers, but by FBB ARPU, churn, integration synergies and FCF conversion, to determine whether it is a diversification benefit or an increase in fixed burdens.
• Monitor adjacent businesses such as GSA and CLICX by whether AIS itself has additional contribution, guarantee, long-term contract or loss absorption obligations, rather than by ownership percentage.
• Regulatory risk is most severe if additional spectrum burden and limits on price pass-through occur at the same time; monitor this through ARPU, EBITDA margin, post-dividend FCF and effective leverage.
• Dividends are subject to a minimum 70% policy, but the track record shows a high payout ratio; continue confirming whether AIS would actually adjust ordinary dividends in a stress scenario.

6. Unconfirmed Items

Some items in the discussion were described as having been additionally checked on the web, but primary sources were not rechecked in this exercise. In particular, the full text of individual S&P and Fitch comments, TRUE’s latest competitive indicators, data centre expansion projects such as GSA05, CLICX virtual bank ownership percentages and additional capital obligations, NBTC’s MVNO and wholesale access policy, and reserve prices and payment terms for future spectrum need to be rechecked against primary materials in future formal issuer_summary or issuer_flash updates.

AIS’s guarantees of GSA-related obligations, completion support, support letters, long-term capacity usage contracts, take-or-pay obligations, inability to pass through power costs, and loss compensation or additional capital support obligations to CLICX remain unconfirmed. These are key issues for distinguishing whether adjacent businesses are simply growth options or support risks that consume credit headroom.

On dividend discipline as well, the discussion noted that the disclosed policy allows room to take financial soundness into account, but it remains unconfirmed whether AIS would actually lower ordinary dividends towards around the minimum 70% when post-dividend FCF becomes thin. The degree to which major shareholders’ return expectations would affect capital allocation in a stress scenario also requires further confirmation.

7. Reference Context

• issuer_summary/issuers/advanced_info_service/current/advanced_info_service_issuer_summary_20260513.md
• issuer_summary/issuers/advanced_info_service/current/advanced_info_service_issuer_flash_q1_2026_results_20260520.md
• discussion dated 2026-05-28
• discussion preparation note dated 2026-05-28