Fitch Ratings Signals Deteriorating Outlook for Thai Banks Despite Strong First Quarter
Bangkok, Thailand – Despite a solid start to 2026 with robust earnings reported by the six major domestic systemically important banks (D-SIBs), Fitch Ratings anticipates a deteriorating sector outlook for Thai banks this year. The ratings agency cites thinning net interest margins, a weakening economic outlook, and increasing pressure on borrowers’ ability to repay loans as key factors contributing to this revised assessment. This comes as Thai banks have been actively pursuing regional expansion opportunities in recent years, seeking growth within the ASEAN economies.
The six D-SIBs—Bangkok Bank (BBL), Kasikornbank (KBank), Siam Commercial Bank (SCB), Bank of Ayudhya (Krungsri), and two others—demonstrated an average return on assets of 1.28% in the first quarter of 2026, a slight increase from the 1.23% recorded in 2025. This profitability was sustained through disciplined cost control measures and increased fee income, according to Fitch. However, the agency warns that these positive trends may not continue throughout the year.
Net Interest Margin Compression and Economic Headwinds
A primary concern highlighted by Fitch is the narrowing of net interest margins (NIMs). These margins, the difference between the interest income generated by banks and the interest paid out to depositors, are being squeezed by the Bank of Thailand’s (BOT) series of policy rate cuts. The BOT reduced its policy rate five times between February 2025 and February 2026, impacting bank profitability. While narrowing NIMs were offset by cost control and fee income in the first quarter, Fitch expects this buffer to diminish as the full impact of the rate cuts becomes apparent.
Adding to the challenges is a weakening economic outlook for Thailand. Slower economic growth is expected to impact fee income, which may not remain at current levels. The agency anticipates that credit costs will remain elevated, potentially offsetting gains in other areas. Thai banks experienced solid profitability in 2024 and 2025, with ratios exceeding pre-pandemic levels, but Fitch projects a decline in earnings this year, though they are expected to remain adequate.
Asset Quality Remains Stable, But Risks are Rising
As of the first quarter of 2026, asset quality at the D-SIBs remained stable, with the average impaired-loan ratio holding steady at 3.7% compared to the conclude of 2025. However, Fitch cautions that risks are increasing, and anticipates a slight rise in non-performing loans (NPLs) throughout the remainder of the year. Despite this expected increase, NPLs are still projected to remain below 4.0%.
Specific segments of the banking sector are expected to face greater challenges. Compact and medium-sized enterprises (SMEs) and borrowers with unsecured retail loans are identified as being particularly vulnerable. High household debt, currently at 87% of Thailand’s gross domestic product (GDP), continues to constrain financial flexibility and the ability of households to service their debts, especially as the cost of living rises.
Regional Expansion Amid Domestic Challenges
Despite the looming domestic challenges, Thai banks are actively pursuing expansion opportunities within the ASEAN region. In 2023, large Thai banks significantly increased their cross-border acquisitions, leading to substantial growth in overseas loans between 2020 and 2022. The international loan portfolio of D-SIBs grew to 10% of total outstanding loans, up from 6% in 2020.
Banks like Bangkok Bank, Kasikornbank, Siam Commercial Bank, and Bank of Ayudhya have been expanding their operations into neighboring countries, including Vietnam, Indonesia, and the Philippines, where strong economic growth presents significant opportunities. While the foreign operations of these banks currently represent a small portion of their total assets—less than 1% for most, except for Bangkok Bank which has double-digit figures due to its extensive experience—Fitch expects this trend to continue. The agency anticipates that Thai banks will utilize both branch establishment and acquisitions to diversify revenue streams and leverage local expertise in foreign markets. Fitch Ratings Thailand believes this expansion will resume in 2023.
Recent examples of this expansion include Siam Commercial Bank’s (SCB) acquisition of a 100% share in Home Credit Vietnam in February. This move demonstrates the growing appetite of Thai banks for international growth and diversification.
Key Takeaways
- Fitch Ratings forecasts a deteriorating outlook for the Thai banking sector in 2026, despite a strong first quarter performance.
- Thinning net interest margins, a weaker economy, and rising borrower repayment pressures are key concerns.
- Asset quality remains stable for now, but risks are increasing, with a potential rise in non-performing loans.
- Thai banks are actively expanding into ASEAN markets to diversify revenue streams and capitalize on economic growth.
The next key development to watch will be the release of the Bank of Thailand’s financial stability report, scheduled for July 2026, which will provide further insights into the health of the Thai banking sector and the effectiveness of policy measures. Readers are encouraged to share their perspectives and engage in discussion in the comments section below.