What is the difference between MSR and TDSR in Singapore?

MSR (Mortgage Servicing Ratio) applies specifically to HDB flat loans and EC loans -- it caps your monthly loan repayment at 30% of your gross monthly income. TDSR (Total Debt Servicing Ratio) applies to ALL property loans and caps total debt obligations at 55% of gross income. For HDB and EC purchases, both apply simultaneously -- the tighter constraint (usually MSR) determines your maximum loan.

Does MSR apply to a private condo loan?

No. MSR only applies to loans for HDB flats and Executive Condominiums (ECs) within the first 10 years of their MOP. Private condo purchases are governed solely by TDSR (55% of gross income), which is a less restrictive cap than MSR. This is one reason upgrading from HDB to private condo often increases your borrowing capacity -- you escape the MSR constraint.

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What is MSR? How the 30% Rule Affects Your HDB and EC Loan

By Winfred Quek · CEA R073319H · 8-minute read · Last reviewed May 2026

Quick answer: The Mortgage Servicing Ratio (MSR) caps your HDB or EC monthly loan repayment at 30% of your gross monthly household income. It is calculated at a 4% stress test rate regardless of the actual loan rate. For a household earning $8,000/month, MSR limits the monthly repayment to $2,400 translating to a maximum loan of approximately $430,000–$490,000. MSR applies only to HDB and EC loans private condo purchases use TDSR (55%) only, not MSR.

Facts verified: May 2026 · Sources linked below

The Mortgage Servicing Ratio, or MSR, is a MAS (Monetary Authority of Singapore) lending guideline that was introduced in January 2013 to prevent over-leveraging in the HDB and EC markets. It is one of the most consequential and least understood rules governing how much Singapore residents can borrow to buy an HDB flat or Executive Condominium.

Understanding MSR is essential because it determines the maximum loan quantum available to you, and therefore the maximum price you can pay for an HDB or EC without bringing additional cash. For many buyers, MSR is the binding constraint tighter than TDSR that sets the ceiling on their purchasing power.

The MSR Formula

MSR is calculated as:

MSR = (Monthly property loan repayment) ÷ (Gross monthly household income) ≤ 30%

Both the borrower and co-borrower's income are included in the denominator. The monthly repayment figure used is calculated at a stress-test interest rate of 4% per annum (regardless of the actual market rate, which was approximately 1.5% in 2026). This ensures the stress test accounts for potential rate rises.

Why 4% stress test and not 1.5%? MAS requires banks to compute MSR (and TDSR) at a stress-test rate of at least 4% to ensure borrowers can service the loan even if interest rates rise. In 2022–2023, Singapore floating rates did rise to 3–4% briefly. Stress testing protects buyers from borrowing more than they could sustain in a rising rate environment. The stress test rate, not your actual rate, determines your maximum loan.

MSR by Income: What Loan Can You Get?

The table below shows the maximum HDB or EC loan available under MSR at different household income levels, assuming a 30-year loan term and 4% stress test rate.

Gross Household Income	MSR Cap (30%)	Max Monthly Repayment	Max Loan (30yr, 4%)
$5,000/month	$1,500	$1,500	~$314,000
$6,000/month	$1,800	$1,800	~$377,000
$8,000/month	$2,400	$2,400	~$503,000
$10,000/month	$3,000	$3,000	~$629,000
$12,000/month	$3,600	$3,600	~$754,000
$14,000/month	$4,200	$4,200	~$880,000
$16,000/month	$4,800	$4,800	~$1,006,000

Maximum loan figures are illustrative based on 4% stress test rate, 30-year loan term. Actual bank approval depends on credit score, existing debts, age, and individual bank policies. TDSR (55%) must also be satisfied simultaneously.

MSR vs TDSR: Key Differences

Feature	MSR	TDSR
Cap	30% of gross income	55% of gross income
What it covers	HDB/EC property loan repayment only	ALL debt repayments (car, credit card, personal loan, ALL property loans)
Applies to	HDB flat loans AND bank loans for HDB/EC	All property loans (HDB, EC, private)
Stress test rate	4% (minimum)	4% (minimum)
Binding constraint?	Usually the binding constraint for HDB/EC buyers	Binding when other debts are high

For most HDB and EC buyers with clean credit and no car loan, MSR is the binding constraint. A household earning $10,000/month faces an MSR cap of $3,000/month. If they have no other debt, their TDSR cap is $5,500/month far higher. MSR wins (is more restrictive) in this case, capping their loan at ~$629,000.

For buyers with a car loan of $800/month and a credit card minimum of $200/month, TDSR becomes the effective additional constraint their total allowable debt servicing is $5,500, minus $1,000 existing = $4,500 for the property. But MSR (at $3,000) is still more restrictive for the property loan alone.

MSR and the EC Income Ceiling

Executive Condominiums are subject to both an eligibility income ceiling and MSR-based lending rules. In 2026:

EC eligibility income ceiling: Household income must not exceed $16,000/month to purchase a new EC launch.
EC lending: Governed by MSR (30% cap) for bank loans taken against EC during the first 10 years after MOP.
After EC privatisation (10 years post-MOP): MSR no longer applies. Only TDSR applies to refinancing or purchase of a privatised EC.

EC buyer trap: Buyers at the $16,000 income ceiling can borrow up to ~$1,006,000 under MSR (30% × $16,000 = $4,800/month, 30yr 4% stress test). Combined with a 25% downpayment, this means a maximum purchase price of around $1,340,000. Many 2024–2026 EC launches price 3-bedrooms at $1.2M–$1.5M, which means income-ceiling buyers at the top end may need to bring significant cash to bridge the gap between the MSR-constrained loan and the purchase price.

How MSR Affects the HDB Upgrader Decision

One of the most important and counterintuitive effects of MSR is that upgrading from HDB to private condo can increase your effective borrowing capacity. Here's why:

HDB buyer (MSR applies): $10,000/month income. MSR cap = $3,000/month repayment = max loan ~$629,000. Maximum HDB purchase price with 20% downpayment = ~$786,000.

Same buyer, private condo (TDSR applies, MSR does not): $10,000/month income. TDSR cap = $5,500/month repayment = max loan ~$1,153,000. Maximum private condo purchase price with 25% downpayment = ~$1,537,000.

The gap: Moving from HDB to private condo unlocks nearly twice the borrowing capacity from the same income because the MSR constraint is removed.

This is a structural feature of Singapore's cooling measure framework: HDB lending is constrained more tightly (MSR 30%) to preserve affordability of public housing, while private market lending is governed by the less restrictive TDSR (55%).

Common MSR Mistakes Buyers Make

Using actual mortgage rate, not stress test rate: At 1.5% actual rate, a $629K loan repays at ~$2,170/month which feels like 21.7% of $10K income. Fine. But the stress test at 4% gives $3,000/month = 30%. That is the real constraint.
Forgetting co-borrower income rules: If one borrower is over 55, the bank may apply a haircut to their income contribution. Check with your banker.
Assuming rental income from an existing property counts in full: Rental income is counted at a haircut (typically 30% deduction for vacancy and expenses) for TDSR and MSR calculations.
Confusing EC rules pre- and post-privatisation: MSR applies during the EC's HDB-equivalent period (first 10 years post-MOP). Post-privatisation, only TDSR applies.