A Thai mortgage looks different from a Western one: rates float against the bank’s lending rate, and the Bank of Thailand caps how much you can borrow depending on whether it is your first, second, or third home. This calculator models the loan mechanics and checks your deposit against the relevant LTV ceiling.
How it works
The monthly payment uses the standard amortising loan formula:
loan = price − deposit
i = annualRate / 12 / 100
n = years × 12
payment = loan × i / (1 − (1 + i)^(−n))
Before computing, the tool compares your deposit to the LTV cap for the chosen property number. First homes can reach up to 90 to 100 percent LTV, second homes need roughly 10 to 20 percent down, and third homes about 30 percent down. If your deposit is below the minimum, the tool warns you and shows the shortfall.
Example and tips
A 4,000,000 baht first-home condo with a 10 percent deposit and a 30-year loan at 6 percent costs about 21,580 baht per month, with total interest over the term roughly equal to the original loan amount. Because Thai rates float, stress-test your budget at two to three percentage points higher than the teaser rate — when the fixed period ends and the loan reverts to the MLR-linked rate, the payment can rise sharply.