How Do You Calculate Your Housing Loan? A Step-by-Step Guide for 2026

Learning how to calculate your house loan in Singapore can help you set a realistic property budget and avoid financial strain in the future. This is exactly the purpose of this guide. There are several key factors that affect the result your housing loan calculator will give, which you should take into consideration. Let’s take a look at some of these terms to understand how they affect you and your borrowing process.

• Property price – The starting point of any housing loan is the purchase price of the property. The higher the price of the property, the higher the loan, and the higher the monthly payments.
• Valuation – A lender will also consider the property market valuation, as that might differ from the purchase price. The lower of the purchase price or valuation is typically used when determining the maximum loan amount.
• Downpayment – The size of the loan is also affected by the downpayment. A larger downpayment will reduce the amount you need to borrow, which often means lower monthly payments.
• Loan amount – The loan amount is the difference between the property purchase price and your downpayment. Larger loans generally mean higher monthly repayments and greater overall interest expenses.
• Interest rate – The interest rate deeply influences how you calculate your house loan in Singapore. If interest rates change, even a little bit, you need to recalculate your house loan in Singapore to understand what your monthly repayments might look like.
• Loan tenure – A longer tenure reduces monthly repayments, but it increases the interest rate paid over time. Therefore, a short tenure means higher monthly payments, but lower overall interest cost.
• Income – Of course, the income will be included in the housing loan calculation. A lender will assess your salary, your existing debt and your other financial obligations to accurately evaluate your repayment capacity.

But above the just-mentioned, housing loan eligibility in Singapore imposes some other regulatory limits that are worth mentioning.

• LTV stands for Loan-to-Value ratioand it determines the maximum percentage of a property’s value that can be financed through a loan.
• TDSR stands for Total Debt Servicing Ratio, and it limits the amount of money you can pay towards debt.
• MSR stands for Mortgage Servicing Ratio, and it limits the amount of money you can pay towards mortgage repayments.

If you have any questions, you can contact us!

Step 1: Estimate the Property Price and Downpayment

The first thing you need to type into your housing loan calculator is the property’s purchase price and the downpayment. The property purchase price is the basis of your financing needs, while the downpayment affects the amount you need to borrow. The minimum downpayment will depend on the type of loan and property. And the downpayment will then decide how much you need to borrow. The larger the downpayment, the less you need to borrow and the higher your chances of your application being approved. Remember that there will also be some legal fees and maybe renovation expenses, so estimate those too.

Step 2: Estimate the Loan Amount

After you fulfilled the first step, the next thing you want to do is to estimate the loan amount. It’s important to know that your lender will also consider the property’s valuation. It’s essential to have an estimate of the loan amount, so you know what you are getting yourself into. A mortgage loan is a big commitment and you must ensure that you can actually afford it. Having a clear loan estimate allows you to efficiently analyse other lenders, loans and repayment plans.

If you want to borrow responsibly, having an estimate of the loan amount is the best way to do that.

Step 3: Check LTV, TDSR and MSR Limits

You cannot calculate your loan in Singapore without being aware if you are actually eligible for the loan amount you need. You need to check the Loan-to-Value Ratio, Total Debt Servicing Ratio and Mortgage Servicing Ratio limits before even applying. When evaluating your eligibility, a lender will review your income, employment status, existing debts, and other financial commitments. Even if you have sufficient savings for a downpayment, failing to meet LTV, TDSR, or MSR requirements may reduce the loan amount you can obtain. When checking these limits early, you can set realistic expectations.

Step 4: Calculate the Monthly Repayment

The fourth and final step is to calculate the monthly instalment. When you do this, factor in the loan amount, interest rate, tenure and repayment structure. Try to calculate all possibilities to ensure that you are prepared for all of them. Play with the loan amount and the interest rate and the repayment structure. A loan at a 3% interest rate over 20 years will have different monthly repayments compared to the same loan over 30 years. You need to find a monthly repayment plan you are actually comfortable with it, because otherwise you won’t be able to pay them and end up in debt.