HDB Affordability Calculator Singapore: How Much Can You Really Afford?
Your agent says you can afford a S$700,000 flat. The bank pre-approves you for S$600,000. Your combined salary looks good on paper. So why does the monthly repayment figure make you uneasy when you actually write it down?
Because affordability is not the same as approval. A bank or agent will tell you the maximum you can borrow. Nobody tells you what that repayment does to your actual monthly life — after CPF, after utilities, after the parents’ allowance, after childcare, after everything else that still needs to be paid every month whether you own a flat or not.
Most Singaporeans stretch further than they should on their first flat. Not because they are reckless — because they were never shown the real number. This page will show you yours.
Let’s calculate what you can actually afford.
The calculator above estimates your maximum HDB flat price based on the Mortgage Servicing Ratio (MSR) limit of 30%, your CPF OA balance, available cash, and current HDB loan rules. It also shows a safer recommended price (at 25% MSR usage), your estimated monthly repayment, downpayment required, and whether your available funds cover it. For a S$6,000/month household on an HDB loan: maximum flat price is approximately S$529,000 at the MSR ceiling, or a safer S$441,000 at 25% usage. All figures are estimates — verify with HDB and your financial institution.
Use the Calculator ↑What This Calculator Shows You
Most HDB calculators show you one number: the maximum loan you can borrow. This one shows the full picture — what the loan does to your monthly finances, whether your upfront funds are actually enough, and where you sit relative to the safety benchmarks Singapore regulators have set.
- Maximum estimated flat price — the highest price the MSR and your income can support
- Safer recommended price — at 25% MSR usage, giving you meaningful monthly buffer
- Estimated monthly repayment — what you would actually pay each month over your chosen tenure
- Loan amount — how much of the purchase price the bank or HDB would finance
- Downpayment required — the 25% you need to cover upfront
- CPF and cash breakdown — whether your available funds cover the downpayment or leave a shortfall
- +1% stress test — what happens to your repayment if interest rates rise by 1%
- Reality verdict — Safe, Manageable, Stretched, or Risky
The maximum flat price the calculator shows is not a target — it is a ceiling. The safer recommended price is what most financial planners would consider a reasonable purchase for long-term comfort. The difference between the two is the gap between what you can borrow and what you should borrow.
Why Most People Overestimate What They Can Afford
There are four reasons this happens consistently in Singapore — and none of them are the buyer’s fault. They just do not have the right information at the right time.
The Agent Tells You the Maximum, Not the Comfortable
When a property agent or bank loan officer tells you how much you can borrow, they are telling you the regulatory ceiling — the highest amount the rules allow. They are not telling you what that repayment feels like after CPF, after rent if you are renting while waiting for the flat, after your parents’ allowance, after insurance premiums that need to be paid monthly regardless.
The maximum loan is a constraint, not a recommendation. Treat it accordingly.
The CPF Illusion
CPF OA can service an HDB mortgage, which makes many buyers feel like the repayment is somehow “free” money. It is not. Your CPF OA is built from your gross salary — money that would otherwise compound for retirement or be available for other housing needs. Every dollar of CPF used for mortgage repayment is a dollar not growing in your OA for future flexibility.
More immediately: many buyers forget that their monthly CPF OA contribution may not be enough to fully cover the repayment — requiring a cash top-up every single month. On a flat at the MSR ceiling, the repayment is exactly 30% of your gross income. Your CPF OA contribution is approximately 23% of your gross salary (for employees aged 55 and below). That gap — 7% of gross — is cash you need to find each month.
On a S$6,000 gross household income, a flat priced at the MSR ceiling produces a monthly repayment of S$1,800. Your combined CPF OA contribution is approximately S$1,380/month (23% of S$6,000). That leaves a S$420/month cash gap — every month, for 25 years — that comes directly from your take-home pay. This does not appear on the loan illustration. You have to calculate it yourself.
Ignoring Everything That Happens After the Keys
Buyers focus intensely on the purchase. They rarely model what their monthly finances look like six months after moving in — when there is a renovation loan repayment alongside the mortgage, when the newborn arrives and childcare costs start, when the car loan that looked manageable suddenly does not. The flat is one line item in a budget. The rest of the budget does not pause because you bought a flat.
Stretching for Location or Size
A flat in Bishan costs more than a comparable flat in Woodlands. A 5-room flat costs more than a 4-room. These are real trade-offs — but buyers often decide on location and size first, then work backwards to make the numbers fit, rather than starting with what the numbers allow and working forward.
The flat you can comfortably afford at 30 is not the flat you will live in forever. Singapore’s property market allows for upgrading. Overextending on the first flat makes the next step harder, not easier.
MSR and TDSR Explained Simply
Two ratios govern how much you can borrow for an HDB flat. Understanding both makes the calculator results much more meaningful.
MSR — Mortgage Servicing Ratio (30%)
The MSR caps how much of your gross monthly income can go toward property loan repayments for HDB flats. The current cap is 30%.
If your combined household gross income is S$8,000/month, your maximum monthly HDB repayment is S$2,400 (30% of S$8,000). The bank or HDB will not lend you more than what produces a monthly repayment of S$2,400 — regardless of what you ask for.
This is the primary constraint in the calculator. Most buyers hit the MSR limit long before they hit any other limit.
TDSR — Total Debt Servicing Ratio (55%)
The TDSR is broader. It caps how much of your gross income can go toward all debt repayments combined — mortgage, car loan, personal loan, credit card minimums, everything.
For HDB loans, TDSR is not formally applied in the same way as for bank loans. For bank loans on HDB flats, both MSR (30%) and TDSR (55%) apply — whichever produces the lower loan limit is binding. In practice, for most HDB buyers, the MSR of 30% is the tighter constraint.
If you have an existing car loan or personal loan, those repayments count toward your TDSR. This reduces how much of your income is available for the HDB mortgage — which is why the calculator asks for existing monthly debt obligations. Even S$500/month in existing debt can meaningfully reduce your maximum HDB loan.
| Rule | Cap | Applies To | Loan Types |
|---|---|---|---|
| MSR | 30% | Property loan repayments only | HDB and bank loans for HDB flats |
| TDSR | 55% | All debt repayments combined | Bank loans (HDB and private property) |
Source: MAS and HDB guidelines. Rules subject to change — verify with HDB or your bank before making financial decisions.
Real Singapore Affordability Scenarios
Numbers mean more when they are attached to a real situation. Here are three scenarios that reflect actual Singapore household profiles — with verified figures using 2026 HDB loan rates (2.6% p.a., 25-year tenure, 75% LTV).
HDB concessionary loan at 2.6% p.a., 25-year tenure, 75% LTV. No existing debt obligations unless stated. Downpayment from CPF OA and cash combined. Figures are estimates — use the calculator above with your actual numbers for a personalised result.
Scenario 1: Single Buyer, S$4,000 Gross Monthly Income
Max flat price
Monthly repayment: S$1,200/mo (30% of gross)
Comfortable flat price
Monthly repayment: S$1,000/mo (25% of gross)
25% required
At the MSR ceiling. CPF OA + cash must cover this.
At S$4,000 gross, a single buyer is typically looking at 3-room BTO flats in non-mature estates or older resale flats in less central locations. The maximum loan technically allows a S$353,000 flat, but the monthly repayment of S$1,200 at 30% MSR leaves very little room for anything else after CPF deductions reduce take-home to approximately S$3,200.
At S$4,000 gross, the CPF OA contribution is approximately S$920/month (23%). This almost covers the safer repayment of S$1,000 — but the balance comes from cash. At the MSR ceiling, the S$1,200 repayment exceeds the CPF OA contribution by S$280/month in cash, every month.
A S$353,000 flat is technically affordable at the MSR ceiling, but leaves the buyer financially exposed to any income disruption. A flat in the S$280,000–S$320,000 range gives more breathing room and is worth considering, particularly for BTOs where entry price is lower.
Scenario 2: Single Professional, S$6,000 Gross Monthly Income
Max flat price
Monthly repayment: S$1,800/mo (30% of gross)
Comfortable flat price
Monthly repayment: S$1,500/mo (25% of gross)
25% required
At the MSR ceiling. Substantial CPF OA + cash required.
S$6,000 gross is a common income level for mid-career professionals in Singapore. Take-home after CPF is approximately S$4,800. A flat at S$529,000 requires a S$132,000 downpayment — not impossible, but requiring meaningful savings built up over time.
The CPF OA contribution on S$6,000 is approximately S$1,380/month. At the MSR ceiling repayment of S$1,800, the buyer needs to find S$420/month from cash take-home. Over 25 years, that is S$126,000 in cash contributions on top of CPF. This is the number most single buyers do not calculate before signing.
Scenario 3: Couple, S$10,000 Combined Gross Monthly Income
Max flat price
Monthly repayment: S$3,000/mo (30% of gross)
Comfortable flat price
Monthly repayment: S$2,500/mo (25% of gross)
25% required
At the MSR ceiling. Combined CPF OA from both earners helps significantly.
A S$10,000 combined household income opens up a wide range of resale HDB options, including 5-room flats in mature estates and executive flats. The combined CPF OA contribution is approximately S$2,300/month — enough to cover the safer repayment of S$2,500 almost entirely, with a small cash top-up.
The risk at this income level is lifestyle. A couple earning S$10,000 combined often has or plans children, parents to support, insurance, and a car. Add S$1,600/month for a car and S$700/month for childcare, and the comfortable financial picture at the calculator level becomes genuinely stretched in real life.
| Gross Monthly Income | Max Flat Price (30% MSR) | Safer Price (25% MSR) | Monthly Repayment (Max) | Downpayment (25%) |
|---|---|---|---|---|
| S$4,000 | ~S$353,000 | ~S$294,000 | S$1,200 | ~S$88,000 |
| S$6,000 | ~S$529,000 | ~S$441,000 | S$1,800 | ~S$132,000 |
| S$8,000 | ~S$705,000 | ~S$588,000 | S$2,400 | ~S$176,000 |
| S$10,000 | ~S$882,000 | ~S$735,000 | S$3,000 | ~S$220,000 |
| S$12,000 | ~S$1,058,000 * | ~S$882,000 | S$3,600 | ~S$265,000 |
* HDB income ceiling applies for most flat types — households earning above S$14,000 (combined) are generally not eligible for new HDB flats. Resale HDB has no income ceiling. Figures assume no existing debt obligations, HDB concessionary loan at 2.6% p.a., 25-year tenure, 75% LTV. Rounded figures. Use the calculator above with your actual situation for a personalised estimate. Always verify with HDB.
Your situation is unique. The table above is a starting point.
Enter your actual income, CPF OA balance, cash savings, and existing debts in the calculator for a result that reflects your real position.
Calculate my HDB affordability →The Biggest HDB Affordability Mistakes
1. Treating Maximum Loan as the Purchase Target
The maximum loan the MSR allows is what the rules permit — not what financial planners recommend. Borrowing at the ceiling means a repayment of exactly 30% of gross income, which leaves no buffer if income drops, interest rates rise, or life circumstances change. Most financial advisers suggest staying at or below 25% for sustainable long-term comfort.
2. Not Accounting for the Cash Top-Up Every Month
The gap between your CPF OA monthly contribution (approximately 23% of gross) and your mortgage repayment (potentially 30% of gross) is a cash gap of 7% of gross income — every month for 25 years. On a S$6,000 salary that is roughly S$420/month. Most buyers discover this only after the first few repayment cycles.
3. Ignoring Renovation Costs in the Affordability Calculation
BTO flats require renovation before they are liveable. Resale flats often require significant renovation work. Typical renovation costs in Singapore range from S$30,000 for a basic 4-room to S$80,000+ for a premium renovation. Many buyers finance this through a renovation loan — which adds another monthly repayment on top of the mortgage, potentially pushing total debt obligations past comfortable levels.
4. Not Stress-Testing for Interest Rate Rises
HDB concessionary loan rates are pegged to CPF OA rate plus 0.1% — currently 2.6%. This rate can change. For bank loans, variable rates have moved significantly in recent years. A 1% rate increase on a S$500,000 loan over 25 years adds approximately S$250–280/month to your repayment. The calculator shows this stress test. Take it seriously.
5. Underestimating How Long CPF Takes to Accumulate
Young buyers often assume their CPF OA will grow quickly enough to cover future downpayments. The OA interest rate is 2.5% p.a. on the first S$20,000, and 3.5% p.a. on the next S$30,000. Building S$100,000 in CPF OA takes time — especially while CPF is simultaneously being used to service the mortgage. Enter your actual CPF OA balance, not what you hope it will be at purchase.
Start with your take-home pay after CPF, subtract every real monthly expense you have (or expect to have), and see what remains. That remaining number — not the MSR calculation — is the true test of whether a flat price is sustainable for you. Use the Cost of Living Calculator alongside this one to see the full picture.
What a Safe HDB Purchase Actually Looks Like
A safe HDB purchase is not just about the loan approval or the MSR calculation. It is about what the monthly repayment leaves behind — how much margin you have to handle the rest of your financial life.
The Monthly Repayment Test
After the mortgage repayment (factoring in the cash top-up not covered by CPF OA), does your take-home pay still leave enough for food, transport, insurance, parents’ allowance, utilities, and some savings? If the repayment consumes more than 35–40% of your actual take-home — not gross, take-home — you are likely stretched.
The Emergency Fund Test
Before buying, you should have enough cash reserves to cover three to six months of all expenses, including the mortgage cash top-up, after paying the downpayment. If the downpayment depletes all your cash and leaves zero buffer, any disruption — job loss, medical emergency, major repair — creates an immediate financial crisis.
The Lifestyle Stability Test
Is your income likely to remain stable or grow over the next five years? Are you planning to have children, which will add significant monthly costs? Is there any major upcoming expense — wedding, car, further education — that the purchase would compete with? A flat purchase is a 25-year commitment. The stability of the first three to five years matters most.
The difference between 25% and 30% MSR usage sounds small. On a S$8,000 gross household income, it is the difference between a S$588,000 and a S$705,000 flat — S$117,000 in flat price, which translates to roughly S$600 more per month in repayment. That S$600/month, over 25 years, is S$180,000 in additional repayments — and significantly less financial flexibility every single month.
Check what your take-home actually covers.
Know your CPF take-home pay and real monthly expenses before committing to a flat price. These two calculators used together give you the full picture.
CPF Take-Home Calculator →How does the flat fit your total monthly budget?
Enter your take-home pay and all monthly expenses — including the mortgage cash top-up — to see your real savings rate after the purchase.
Cost of Living Calculator →Frequently Asked Questions
At S$5,000 gross, the MSR ceiling (30%) allows a monthly repayment of S$1,500. At an HDB loan rate of 2.6% p.a. over 25 years, that supports a loan of approximately S$330,000 — and a flat price of approximately S$440,000 at 75% LTV. A safer estimate at 25% MSR usage gives a flat price of around S$367,000. Your downpayment at the MSR ceiling would be approximately S$110,000. These figures assume no existing debts — enter your actual numbers in the calculator for a personalised result.
Partially — and often not fully. Your CPF OA monthly contribution is approximately 23% of your gross Ordinary Wages (for employees aged 55 and below). If your mortgage repayment is set at 30% MSR, your CPF OA contribution covers only 23/30 of the repayment — the remaining 7% of gross income must come from cash. Only if your repayment is at or below your CPF OA contribution (approximately 23% of gross) can CPF fully cover it. Use the calculator to see the CPF vs cash split for your specific flat price.
Yes, the MSR cap of 30% is a regulatory limit for HDB flat purchases — it cannot be exceeded for the property loan component. HDB and all banks and financial institutions must apply this rule when processing a loan for an HDB flat. If your requested loan would produce a repayment above 30% of your gross income, the loan will be reduced to comply. This is not a guideline — it is a hard cap set by MAS and HDB.
It depends heavily on the flat type (BTO or resale) and location. A new BTO 4-room flat in a non-mature estate may be priced at S$300,000–S$450,000. A resale 4-room in a mature estate could be S$550,000–S$750,000+. To support a S$500,000 flat (after grants) on an HDB loan at 2.6% p.a. over 25 years, you need a gross household income of approximately S$6,800–S$7,000/month to stay at or below the 30% MSR. A single buyer on S$6,000 gross can technically afford a S$529,000 flat at the MSR ceiling — but the safer range is closer to S$440,000. For a couple, S$8,000–S$10,000 combined opens up a much wider resale range.
The main differences: HDB loans have a fixed rate of 2.6% p.a. (currently), while bank loans offer variable or fixed packages typically starting higher. HDB loans require no minimum cash downpayment — the full 25% can be paid from CPF OA. Bank loans require at least 5% in cash, with the remaining 20% from CPF or cash. HDB loans have a maximum tenure of 25 years; bank loans allow up to 30 years. Both have an LTV of 75% for HDB flats (first property, no outstanding HDB loan). HDB loans also do not formally apply TDSR, while bank loans do. Buyers who qualify for HDB loans should carefully compare both options — the stability of a fixed HDB rate versus the potentially lower initial rate of a bank package depends on your risk tolerance and market outlook.
Grants reduce the effective purchase price you need to finance — they can be used toward the downpayment or to reduce the loan amount. The Enhanced CPF Housing Grant (EHG) can be up to S$120,000 for eligible first-time buyers. The Proximity Housing Grant (PHG) provides up to S$30,000 for resale flats near parents or married children. However, grants are means-tested, flat-type specific, and subject to eligibility conditions — they are not guaranteed until confirmed by HDB. The calculator has a grant field where you can enter an expected amount, but the result is clearly labelled as an estimate. Always verify your actual grant eligibility with HDB before making purchase decisions.
In most cases, staying below the MSR ceiling is the more sustainable choice. At 30% MSR, your repayment is exactly at the regulatory limit — any income disruption, interest rate rise, or increase in other monthly obligations creates immediate pressure. At 25% MSR, you retain meaningful financial flexibility. The exception might be if your income is highly stable and growing, you have no other significant debt obligations, and the specific flat represents exceptional value. Even then, most planners would recommend the 25% benchmark as the target, with 30% as the absolute ceiling.
Stop guessing. Start knowing.
Eight calculators built around how Singapore actually works — CPF, HDB, cars, cost of living, savings. Your real numbers, in under five minutes.