Work out what you can borrow before you fall in love with a home. Banks measure your total monthly debt repayments, including the new loan, against 55% of your gross monthly income. This is the total debt servicing ratio (TDSR).
For HDB flats and executive condominiums, there is a second test. Your property loan repayments must stay within 30% of your gross monthly income. This is the mortgage servicing ratio (MSR), and it is often the tighter limit.