Mortgage Servicing Ratio (MSR) Singapore

Last updated: August 2026

The Mortgage Servicing Ratio (MSR) is a Singapore property loan rule that caps the monthly repayment for an HDB flat or Executive Condominium loan at 30% of a borrower’s gross monthly income, applied in addition to the broader Total Debt Servicing Ratio limit.

Not financial advice. All figures for educational reference only. Data as at August 2026.

Key Takeaways

MSR limits the monthly instalment for an HDB flat or Executive Condominium (EC) loan to 30% of a borrower’s gross monthly income, whether the loan is from HDB or a bank.
MSR applies only to HDB flats and new or resale ECs — it does not apply to private condominiums or landed property, which are subject only to the broader Total Debt Servicing Ratio (TDSR).
Because MSR is generally more restrictive than TDSR for these property types, it is usually the binding constraint that determines how large a loan an HDB or EC buyer can take.
MSR is calculated on gross income, using the same haircuts and income assessment methods MAS prescribes for variable income, rental income, and other income sources used in TDSR calculations.
Buyers who fail the MSR test can reduce the loan amount, extend the loan tenure (subject to age and tenure caps), add an income-earning co-borrower, or pay a larger downpayment to bring the instalment within the 30% limit.

What Is Mortgage Servicing Ratio (MSR) Singapore?

The Mortgage Servicing Ratio is one of Singapore’s key property loan safeguards, introduced to keep monthly housing repayments for public and quasi-public housing affordable relative to a household’s income. It sits alongside the broader Total Debt Servicing Ratio (TDSR) framework that the Monetary Authority of Singapore (MAS) applies to all property loans, but MSR is narrower in scope, applying specifically to loans for HDB flats (whether bought directly from HDB or on the resale market) and Executive Condominiums, which are a hybrid form of public-private housing. The rule exists because HDB flats and ECs are meant to remain accessible as a primary home for the majority of Singaporean households, so capping the loan instalment at 30% of gross income is intended to prevent buyers from overextending themselves on housing debt relative to their earnings, even if a larger loan might otherwise be serviceable under the more permissive TDSR limit alone.

How Does It Work in Singapore?

For any loan used to buy an HDB flat or an EC, the monthly mortgage instalment cannot exceed 30% of the borrower’s gross monthly income, calculated using MAS’s standard income assessment rules — fixed income is counted in full, while variable income sources like commissions, bonuses, and rental income are typically subject to a haircut (commonly 30% less) to build in a buffer against income volatility. This 30% MSR limit applies whether the loan is an HDB concessionary loan or a bank loan, and it is assessed alongside — not instead of — the 55% TDSR limit that caps all of a borrower’s monthly debt obligations, including the mortgage, car loans, credit card minimum payments, and other loans, relative to gross income. Because 30% is well below the 55% TDSR ceiling, MSR is usually the binding constraint for HDB and EC buyers with few other debts, while buyers who already carry significant other debt may find TDSR becomes the tighter limit instead. Private condominiums and landed homes are not subject to MSR at all, only TDSR, which is one reason maximum loan quantums can look different between an EC and a similarly priced private condo.

Example

A couple with a combined gross monthly income of S$8,000 wants to buy a resale EC. Under MSR, their maximum monthly mortgage instalment across both HDB concessionary and bank loan options for this property type cannot exceed 30% of S$8,000, or S$2,400. Even if their TDSR calculation (which also factors in a small car loan) would technically allow a higher instalment of up to 55% of income before hitting the TDSR ceiling, the MSR cap of S$2,400 is the binding limit, since it is more restrictive for this property type — meaning the size of loan they can actually be approved for is determined by the 30% MSR test, not the 55% TDSR test.

Advantages

**Keeps public and quasi-public housing affordable** by preventing buyers from taking on HDB or EC loan instalments that consume an outsized share of household income.
**Adds a buffer against income shocks**, since a lower instalment-to-income ratio leaves more room to absorb a job loss, pay cut, or unexpected expense without defaulting.
**Provides a consistent, transparent benchmark** that banks and HDB apply uniformly, making it easier for buyers to estimate their maximum loan quantum before house-hunting.
**Works alongside TDSR to guard against compounding debt risk**, since a buyer could pass MSR narrowly but still be reined in by TDSR if they carry substantial other debt.

Risks and Limitations

MSR can meaningfully reduce the loan quantum a buyer qualifies for compared with what they might expect from income alone, especially for single-income households or buyers with variable income subject to haircuts.
Because MSR only applies to HDB flats and ECs, buyers comparing an EC against a similarly priced private condo may find the EC purchase more constrained by financing rules, which is easy to overlook when comparing headline prices alone.
Extending the loan tenure to fit within the MSR limit reduces the monthly instalment but increases total interest paid over the life of the loan, and is itself capped by the borrower’s age and the property’s remaining lease.
Relying on a co-borrower’s income to pass MSR ties that person’s creditworthiness and future borrowing capacity to the loan, which can complicate their own home financing plans later.

MSR vs TDSR

Feature	Mortgage Servicing Ratio (MSR)	Total Debt Servicing Ratio (TDSR)
Applies to	HDB flats and Executive Condominiums only	All property types, including private condos and landed homes
Income cap	30% of gross monthly income	55% of gross monthly income
What’s included	Only the mortgage instalment for the property being financed	The mortgage instalment plus all other monthly debt obligations
Which is usually binding	Often the tighter limit for HDB/EC buyers with few other debts	Often the tighter limit for buyers with significant other debt, or for private property
Set by	HDB (for HDB loans) and MAS-regulated banks	MAS, applied across all financial institutions

Source: The Kopi Notes analysis based on publicly available information, MAS/CPF Board/MOM/MOH guidance, and SGX company disclosures, August 2026.

The Bottom Line

MSR is the extra affordability guardrail specific to HDB and EC financing, and because it is usually more restrictive than TDSR for these property types, buyers should calculate their maximum loan quantum against the 30% MSR limit first, then double-check it still clears the broader 55% TDSR test before assuming a particular loan size is achievable.

Frequently Asked Questions

What properties does MSR apply to in Singapore?

MSR applies to loans for HDB flats, whether bought new from HDB or on the resale market, and to new or resale Executive Condominiums. It does not apply to private condominiums or landed property.

What is the MSR limit?

The monthly mortgage instalment cannot exceed 30% of the borrower’s gross monthly income, using MAS’s standard income assessment and haircut rules.

How is MSR different from TDSR?

MSR only looks at the instalment for the property being financed and caps it at 30% of income, while TDSR looks at all monthly debt obligations combined and caps them at 55% of income.

Which limit applies if I'm buying an EC?

Both apply — the loan must satisfy the 30% MSR cap and the 55% TDSR cap simultaneously, and whichever produces the lower maximum loan amount is the binding constraint.

Can I increase my loan quantum if I fail the MSR test?

Common options include adding an income-earning co-borrower, extending the loan tenure within age and lease limits, or increasing the downpayment to reduce the loan amount needed.