Can I drink the tap water?

No. Use water refill machines found on the street, which cost 1 THB per liter, to keep costs down and stay hydrated.

Are there hidden costs?

Yes—temple entrance fees and alcohol. A single beer in a bar can blow 20% of your daily budget, so stick to buying drinks at 7-Eleven.

How to travel Thailand on under $25 per day

To stay under $25 daily, stick to street food, use public buses or trains instead of domestic flights, and prioritize hostels or fan-cooled guesthouses. Avoid tourist-heavy islands and stick to Northern Thailand to keep your daily costs firmly under your target budget.

Choose the right region. Northern Thailand, specifically Chiang Mai, Chiang Rai, and Pai, is significantly cheaper than the southern islands. Spend 80% of your time here.
Master the street food habit. Eat exclusively at local night markets or street stalls. A plate of Pad Thai or Khao Soi should cost between 40 and 60 THB ($1.15–$1.70). Avoid sit-down restaurants with English menus.
Use local transport. Take the overnight train (fan class) or government buses rather than tourist minivans or domestic flights. Download the '12Go Asia' app to check prices, but book directly at the station to avoid agency fees.
Find low-cost lodging. Book hostels via aggregator sites, but call or walk in to ask for a lower 'long-stay' rate if you plan to stay more than 3 days. Aim for a bed price of 250–350 THB ($7–$10) per night.

Can I drink the tap water?: No. Use water refill machines found on the street, which cost 1 THB per liter, to keep costs down and stay hydrated.
Are there hidden costs?: Yes—temple entrance fees and alcohol. A single beer in a bar can blow 20% of your daily budget, so stick to buying drinks at 7-Eleven.