Thailand's mortgage market is tightening as lenders shift focus from income alone to scrutinizing borrowers' financial behaviour and debt levels. Only 40% of mortgage applications at GH Bank were approved in early 2026. Key barriers include high household debt, undocumented income (especially for SME owners), and poor repayment patterns—even minor BNPL delays now factor into credit assessments. Developers are adapting by cutting prices and bulk-selling inventory, making financial education critical for younger borrowers seeking home loans.