Thailand’s Ministry of Transport (MoT) is preparing a plan to buy back concessions for four major electric rail lines in Bangkok at an estimated cost of THB160 billion, with the proposal set to be submitted to the cabinet on December 16, 2025. The buyback would transfer ownership of the lines to the Mass Rapid Transit Authority of Thailand (MRTA) and convert existing public-private partnership (PPP) Net Cost concessions into 30-year operations and maintenance (O&M) contracts.
The first phase covers the BTS Green Line (Sukhumvit and Silom core sections), MRT Blue Line, Pink Line (Khae Rai–Min Buri), and Yellow Line (Lat Phrao–Samrong). Under the proposed restructuring, MRTA would own all infrastructure and assume fare revenue risk, while private operators would be retained under fixed-fee O&M contracts. This shift is intended to enable fare integration, cap fares in line with the government’s 40-baht-per-day policy, and support the rollout of a seamless common ticket across the network.
The Green Line concessions held by Bangkok Metropolitan Administration and BTS Group expire between 2029 and 2042, while the Blue Line concession with BEM runs until 2049. The Pink and Yellow monorail lines, operated under PPP Net Cost models by Northern Bangkok Monorail and Eastern Bangkok Monorail respectively, have concession terms extending to 2053. The Transport Ministry has indicated that early discussions with BTS Group and BEM show no objection in principle to the single-ownership model, subject to protection of operational continuity and commercial rights.
To finance the buyback without increasing headline public debt, the ministry is studying options including the creation of an infrastructure fund and staged payments linked to new long-term O&M contracts. Payments could be spread over 20–30 years, alongside O&M fees, allowing existing operators to continue running services while revenue rights revert to the state. The reform is positioned as a structural step toward lower fares, integrated ticketing, and long-term consolidation of Bangkok’s urban rail system under MRTA ownership.