TDSR and MSR: How Much Can You Actually Borrow?

The two ratios that quietly set the real ceiling on your property loan — explained before you fall in love with a home.

Why your borrowing limit is not what you think

Most buyers begin with the price of a property and work backwards. The more useful starting point is the opposite: how much a bank will actually lend you, which is governed less by the property and more by your income and existing commitments. In Singapore, two frameworks do most of that work — the Total Debt Servicing Ratio and the Mortgage Servicing Ratio. Understanding them early is what separates buyers who shop realistically from those who fall for homes they cannot finance.

Neither ratio is designed to frustrate you. Both exist to keep borrowing sustainable, so that a change in interest rates or income does not tip households into distress. But their practical effect is to set a firm ceiling on your loan, and that ceiling is often lower than buyers expect once their other obligations are counted. Knowing where you stand before you view is one of the simplest ways to avoid disappointment.

Total Debt Servicing Ratio (TDSR)

TDSR caps your total monthly debt repayments as a proportion of your gross monthly income. Crucially, it counts all your debt, not just the home loan you are applying for. Car loans, personal loans, credit card commitments, and any other borrowing are all included in the calculation. This is why two people with identical salaries can qualify for very different loan amounts: the one carrying a car loan and other commitments has less headroom for a mortgage.

The practical consequence is that reducing or clearing other debts before applying can meaningfully increase the property loan available to you. Many buyers do not realise that a manageable car loan is quietly shrinking the home they can buy. Checking your TDSR position early, and tidying up other commitments where sensible, can change what is realistically within reach.

Mortgage Servicing Ratio (MSR)

MSR applies specifically to loans for HDB flats and executive condominiums, and it caps the portion of gross monthly income that can go toward the mortgage alone. Where TDSR looks at all your debt, MSR is narrower but stricter within its scope, and for HDB and EC buyers both tests apply. In practice, MSR is often the binding constraint for these buyers, setting a lower ceiling than TDSR would on its own.

This matters most for upgraders and younger buyers looking at executive condominiums, where the MSR limit can cap the loan below what their income might otherwise support. Understanding which ratio binds in your situation — and it is not always the one you assume — is essential before you commit to a price range. The last thing you want is to negotiate hard on a unit only to find the loan will not stretch to it.

Putting the two together

For a private property, TDSR is the framework that matters. For an HDB flat or an executive condominium, both TDSR and MSR apply, and the tighter of the two wins. The sensible sequence is always the same: work out your realistic loan ceiling under the relevant ratios first, then shop within it, rather than finding a home and hoping the financing follows.

If you want to know your genuine borrowing headroom before you start viewing, that calculation is quick to run and saves a great deal of wasted time and heartache. It is one of the first things we help buyers establish, precisely because so much of the rest of the journey depends on it.

How your income type affects the calculation

An important detail that catches many buyers is how banks treat different kinds of income. Fixed monthly salary is counted in full, but variable income — commissions, bonuses, freelance earnings, or rental income — is typically discounted before it enters the ratio calculation. This means self-employed buyers and those with a large variable component to their pay can qualify for smaller loans than their headline earnings might suggest.

If a meaningful share of your income is variable, it is worth understanding how the discounting works before you assume a particular loan is within reach. Providing clear, well-documented evidence of consistent variable income can help, but the conservative treatment is built into the framework and cannot be argued away. Buyers in this position benefit most from checking their real qualifying income early, because the gap between gross earnings and recognised income is exactly where over-optimistic plans come unstuck.