Yes, you are absolutely allowed to bring luggage on the Singapore MRT, and it is a very common sight, especially on the East-West (Green) Line connecting to Changi Airport. However, there are practical and social "rules" to follow. There is no official "weight limit" or extra fee for luggage, but your bags must be manageable and must not block the doors, aisles, or priority seats. During peak "rush hours" (7:00–9:00 AM and 5:30–7:30 PM), bringing large suitcases can be extremely difficult and is generally discouraged due to the high density of commuters. In 2026, Singapore authorities also remind travelers that "motorized luggage" (suitcases you can ride) is classified similarly to Personal Mobility Devices (PMDs) and is generally prohibited from being ridden on station platforms and within trains for safety reasons. When traveling with bags, try to use the designated wheelchair/stroller spaces at the ends of the train cars, as these provide more floor space to keep your luggage tucked out of the way of other passengers.