Purchasing a house is a major achievement in life, and for the majority of Singaporeans, obtaining a mortgage is a crucial step in the journey. This article will guide you on all aspects of monthly mortgages in Singapore, from determining your borrowing capacity to computing your monthly payments and utilizing a mortgage calculator.

How Much Loan Can You Borrow for Your New Home?
Several key factors determine the maximum home loan amount you can borrow in Singapore. Your income, current financial obligations, and the type of property you are buying are the key factors to consider. Here’s an in-depth examination of these elements:
Loan-to-Value (LTV) Ratio: This ratio represents the portion of the property’s cost or value that can be covered by a loan. The LTV ratio can go up to 75% for both HDB flats and for private properties. For private property, a minimum down payment of 25% of the property’s value is required. With at least 5% in cash and the remaining amount through CPF or cash.
Total Debt Servicing Ratio (TDSR): The TDSR was introduced to prevent borrowers from financially overextending themselves. By limiting the amount of their gross monthly income that can be used to repay debts, including their mortgage. In Singapore, the Total Debt Servicing Ratio is limited to 55%. If you earn $10,000 per month, the sum of all your debt payments such as personal loans, car loans, and mortgage should not go beyond $5,500.
Mortgage Servicing Ratio (MSR): The MSR is an additional limitation that applies specifically to HDB flats and executive condominiums. It specifies that your gross monthly income should not be more than 30% of your monthly mortgage repayment. This regulation guarantees that your mortgage payments stay affordable and reduces the chances of experiencing financial difficulties caused by borrowing too much.
Furthermore, the duration of the loan is another aspect that should be taken into account. The longest loan period for HDB flats is 25 years, whereas for private properties, it is limited to 30 years. Opting for shorter loan durations leads to increased monthly payments. But ultimately reduces the total interest paid throughout the loan’s duration.
What Is a Mortgage Repayment?
A mortgage payment is a monthly instalment made to cover your housing loan. It is made up of two components:
Principal Repayment: This is the amount of your payment that is allocated to lowering the original loan balance (the principal). As you continue to make payments, the original loan amount decreases, which in turn lowers the interest charged on your loan.
Interest Repayment: This is the expense incurred when borrowing money from the bank. During the initial period of your home loan, a significant amount of your monthly instalment is usually allocated towards interest payment. As the loan advances, a larger portion of your payment is allocated to decreasing the principal amount.
In Singapore, there are two prevalent forms of mortgage repayment schedules.
Fixed-rate mortgage: With a fixed-rate loan, the interest rate stays the same for an initial period, usually ranging from two to five years. This ensures consistency in monthly payments, facilitating budgeting. Nevertheless, following the period of a fixed rate, the interest rate could shift to variable, depending on market influences.
Variable-rate mortgage: A variable-rate mortgage is a loan where the interest rate changes depending on market conditions. This loan offers the advantage of potentially enjoying lower interest rates. However, in the event that interest rates go up, your monthly payments may also go up.
Selecting the appropriate mortgage arrangement is essential to match your financial condition and risk threshold. Certain homebuyers favour fixed-rate loans for their predictability, whereas others may prefer variable-rate loans for their associated risks and rewards.

How Much Mortgage Payment Can You Afford?
Affordability is a major factor to consider when acquiring a mortgage. In order to prevent stretching yourself too thin, it is generally recommended that your monthly mortgage payments do not surpass 30-35% of your total monthly income. The Mortgage Servicing Ratio (MSR) is applicable to loans for HDB flats and executive condominiums.
To calculate how much you can afford, consider the following factors:
- Interest rates: Monthly payments are higher when interest rates increase.
- Loan duration: The longer the loan tenure, the lower the monthly payments, but the higher the total interest paid over time.
- Initial deposit: A higher down payment decreases the sum you have to loan, decreasing your monthly payments.
How to Calculate Housing Loan Monthly Instalment
To calculate your monthly mortgage instalment, you will need to know the loan amount, interest rate, and loan tenure. The formula to calculate the monthly payment is:

Where:
- P is the loan amount
- r is the monthly interest rate (annual rate divided by 12)
- n is the total number of payments (loan tenure in months)
Alternatively, you can use online mortgage calculators to simplify this process.
How to Use a Mortgage Calculator
A mortgage calculator is an excellent tool for estimating your monthly mortgage payments. By inputting details such as the loan amount, interest rate, and loan tenure, the calculator will provide an estimate of how much you need to pay each month.
Most mortgage calculators also allow you to see the breakdown of principal and interest over time, giving you a clear picture of how much of your payment goes toward repaying the loan versus paying interest.
Conclusion
Understanding your monthly mortgage responsibilities is crucial to managing your finances in Singapore. Being well-informed, from determining your borrowing limit to understanding your affordability and utilizing resources such as mortgage calculators to strategize your repayments, can empower you to make wise financial choices. By adhering to suggested debt ratios and giving thoughtful consideration to aspects such as loan duration and interest rates, you can guarantee that your mortgage stays manageable and aligns well with your future financial goals.
Make sure to check out online tools like the Mortgage Repayment Calculator and other housing loan calculators for in-depth insights and help with calculating your monthly mortgage payments.
Want to find the best mortgage rate in town? Check out our free comparison service to learn more!
Read more of our posts below!