TDSR vs MSR Singapore
The Two Debt Ratio Limits That Cap How Much Home Loan You Can Borrow
Category: BANKING · Last updated: September 2026
The Total Debt Servicing Ratio (TDSR) caps all of a borrower’s monthly debt obligations, including the new home loan, at a percentage of gross monthly income, and applies to every property loan in Singapore. The Mortgage Servicing Ratio (MSR) is a stricter, additional cap that applies only to HDB flats and Executive Condominiums bought from a developer, limiting just the home loan repayment itself to a lower percentage of income.
Not financial advice. All figures for educational reference only. Data as at September 2026.
Key Takeaways
- TDSR applies to all property loans in Singapore, private and public alike, and limits total monthly debt repayments, including the new mortgage, credit cards, car loans, and other debt, to a set percentage of gross monthly income.
- MSR applies only to HDB flats and Executive Condominiums purchased directly from a developer, and separately caps just the mortgage repayment itself to a lower percentage of income than the TDSR limit.
- When buying an HDB flat or new EC, both ratios must be satisfied simultaneously; MSR being the tighter of the two usually ends up as the binding constraint for these purchases.
- For private resale property and resale ECs (beyond the MOP restriction period), only TDSR applies since MSR does not extend to those transactions.
- Both ratios are calculated by the lending bank based on MAS-set rules using standardised income haircuts for variable income and existing debt obligations, not just the borrower’s own estimate of affordability.
What Are TDSR and MSR?
The Total Debt Servicing Ratio, or TDSR, is a Monetary Authority of Singapore framework that caps the proportion of a borrower’s gross monthly income that can go toward servicing all of their debt obligations combined, including the new home loan being applied for, existing credit card balances, car loans, personal loans, and any other property loans. It applies to every residential property loan in Singapore, regardless of whether the property is HDB, an Executive Condominium, or private property.
The Mortgage Servicing Ratio, or MSR, is a separate and narrower rule that applies only to loans for HDB flats and Executive Condominiums bought directly from a developer. Unlike TDSR, which looks at all debt, MSR looks specifically at the mortgage repayment for the property being purchased and caps it at a lower percentage of gross monthly income than the TDSR limit allows.
Both frameworks exist as macroprudential tools to keep household borrowing at sustainable levels and to guard against overleveraging in the property market, complementing other cooling measures such as Loan-to-Value limits and Additional Buyer’s Stamp Duty.
How Do TDSR and MSR Work Together in Singapore?
When a borrower applies for a home loan for an HDB flat or a new EC bought from a developer, the lending bank must check that the loan satisfies both the TDSR and MSR limits simultaneously. Because MSR only looks at the mortgage itself and caps it at a lower percentage than TDSR’s all-in debt limit, MSR is typically the binding constraint for these purchases, meaning it usually restricts the maximum loan more tightly than TDSR alone would.
For private resale property, and for resale Executive Condominiums once they are past their five-year Minimum Occupation Period, only TDSR applies; MSR does not extend to these transactions, since MSR is specifically targeted at the segment of the market where MAS wants borrowers to maintain a larger buffer between their income and their mortgage commitment on public and quasi-public housing.
Both ratios are not simply based on a borrower’s own income claim: banks apply standardised MAS-set haircuts to variable income sources (such as bonuses, rental income, or self-employed income) and factor in existing debt obligations using a stress-tested interest rate (a medium-term interest rate floor set by MAS, rather than the current promotional mortgage rate) to ensure borrowers can service the loan even if interest rates rise from today’s levels.
TDSR and MSR Example
A couple with a combined gross monthly income of S$10,000 wants to buy a new Executive Condominium from a developer. Under MSR, their total mortgage repayment for the EC cannot exceed a set percentage of that S$10,000 combined income. Separately, under TDSR, their total debt repayments, including this new mortgage plus any car loan or credit card balances they carry, cannot exceed a higher overall percentage of the same income.
If the couple has no other outstanding debt, MSR is likely to be the tighter constraint, since it applies a lower cap specifically to the mortgage alone. But if they also have a substantial car loan, TDSR could become the binding constraint instead, since it accounts for all debt obligations together, potentially reducing their maximum loan quantum below what MSR alone would have allowed.
Advantages of TDSR vs MSR
- Prevents overleveraging. By capping debt obligations relative to income, both ratios help ensure borrowers do not take on a mortgage that could become unsustainable if their circumstances change.
- Stress-tested against rate rises. Because banks use a MAS-set stress-test interest rate rather than the current promotional rate, both ratios build in a buffer against future interest rate increases.
- Consistent, rules-based framework. Because TDSR and MSR are standardised MAS requirements applied by every bank, borrowers face consistent lending standards regardless of which bank they approach.
- Extra protection for HDB and EC buyers. MSR’s additional, tighter cap specifically protects buyers of public and quasi-public housing, a segment MAS has identified as warranting extra safeguards.
Risks and Limitations
- Can significantly limit loan quantum. Borrowers with existing debt obligations, in particular, may find their maximum loan size considerably smaller than they expected once TDSR and MSR are applied.
- Variable income is haircut, reducing borrowing capacity. Bonuses, rental income, and self-employed income are only counted at a discounted rate under MAS rules, which can catch borrowers with income structures that don’t fit a straightforward fixed-salary profile off guard.
- MSR does not apply to resale private property. Buyers moving from an HDB flat to private resale property need to recognise that only TDSR applies there, a different (and sometimes less restrictive) calculation than what they may be used to from an HDB purchase.
- Rules can change. MAS periodically revises TDSR and MSR thresholds and the stress-test interest rate as part of broader property cooling measures, so historical borrowing capacity calculations can become outdated.
TDSR vs MSR
| Feature | TDSR | MSR |
|---|---|---|
| Applies to | All residential property loans | HDB flats and new ECs bought from a developer only |
| What it caps | All monthly debt obligations combined | The mortgage repayment for the property being purchased, specifically |
| Relative strictness | Higher percentage cap | Lower percentage cap (generally the binding constraint for eligible purchases) |
| Applies to private resale property? | Yes | No |
| Set by | MAS | MAS |
Source: TKN research, compiled September 2026.
The Bottom Line
For most HDB and new EC buyers, MSR ends up being the tighter constraint on how much they can borrow, while TDSR is the broader rule that applies across every property loan in Singapore. Understanding which ratio binds in your specific situation, and how existing debt affects it, is essential before assuming a particular loan quantum is achievable.