Choosing a home loan is not about the lowest headline rate — it is about matching a package to your risk appetite, holding horizon, and refinancing plans. This guide covers the exact inputs a mortgage recommender weighs: SORA-floating vs fixed, TDSR headroom, HDB concessionary eligibility, and lock-in penalties, so you arrive at the right package type (as of 2026-06).
Every month, Singapore borrowers sign mortgage packages that look great on a rate sheet but quietly misalign with their actual circumstances. A first-time buyer on a tight budget locks into a two-year fixed package and then sells after eighteen months, absorbing a full clawback of the legal subsidy. An upgrader picks a SORA-floating package right before a rate cycle turns upward, watching monthly instalments climb for two years. Neither borrower made a foolish decision — they just optimised for the wrong variable. A good mortgage recommender does not simply surface the cheapest headline rate: it maps your financial profile and behavioural tendencies to the package architecture that best fits how you actually live. Understanding the matching logic lets you interpret any recommendation critically and verify it against the latest board rates before signing.
The four inputs that drive every mortgage recommendation
A mortgage recommender typically works with four structured inputs before it shortlists packages. The first is rate type preference: fixed-rate packages offer payment certainty for a lock-in period, usually two to three years, and suit borrowers who want predictable cash flow, expect benchmark rates to rise, or are stretching their TDSR headroom to the limit. SORA-floating packages tie your spread to the Singapore Overnight Rate Average, the benchmark administered and published daily by MAS as Singapore's key interest rate benchmark since 2021. They suit borrowers comfortable with payment variability and those who expect benchmark rates to fall — since SORA is compounded daily and published transparently, it is considered more reflective of market conditions than older board-rate or SIBOR-linked packages.
The second input is your holding horizon: how long you plan to keep both the property and the same loan before selling or refinancing. A short horizon of under three years calls for minimal lock-in and low or no prepayment penalties, even if the rate is marginally higher, because the penalty and legal fee clawback on an early exit can dwarf any rate savings. A long horizon of five or more years favours a competitive long-run spread, since you will ride through multiple rate cycles regardless.
The third input is whether you are eligible for an HDB concessionary loan. The HDB concessionary rate is pegged at 0.1 percentage points above the prevailing CPF Ordinary Account interest rate, currently 2.6% per annum (as of 2026-06). It carries no lock-in period, no prepayment penalty, and can be serviced entirely from CPF. For buyers who value cash-flow stability and plan to stay long-term, the HDB loan often wins despite headline bank rates sometimes appearing lower, because bank rates are variable and carry subsidies that must be returned on early exit.
The fourth input is your Total Debt Servicing Ratio headroom. MAS mandates via the TDSR framework that total monthly debt obligations — including the new mortgage — cannot exceed 55% of gross monthly income. You can verify your personal TDSR ceiling using the TDSR calculator. If you are already close to the 55% ceiling on a stress-tested rate, a floating package with rate-rise risk may push you into technical default even if today's payment is affordable. Recommenders apply a stress buffer of typically 50 basis points above the quoted rate before approving a floating selection.
Answer a few simple questions about your income, risk appetite, and property plans and get a personalised mortgage recommendation. The wizard analyses TDSR, MSR, LTV, and rate sensitivity to suggest the optimal loan structure for your situation.
What This Calculator Does
Answer a few simple questions about your income, risk appetite, and property plans and get a personalised mortgage recommendation. The wizard analyses TDSR, MSR, LTV, and rate sensitivity to suggest the optimal loan structure for your situation.
You can find this calculator in the Calculators tab on ShiokNest. It updates results instantly as you adjust inputs — no waiting, no page reloads.
Why This Matters
What You Will Discover
After running this calculator with your personal numbers, you will know:
Key Inputs Explained
Here are the inputs you will configure, along with their default values. Each default is calibrated to a realistic Singapore condo scenario so you can explore results immediately.
| Field | Description | Default Value |
|---|---|---|
| Gross Monthly Income | Your total monthly income before tax. | - |
| Property Type | Private property, HDB, or Executive Condo. | - |
| Purchase Price | The total property price before additional costs. | $1,500,000 |
Step-by-Step Guide
- 🏠 Navigate to Calculators — Click the "Calculators" tab in the ShiokNest navigation bar. All 47 calculators are grouped by purpose for easy access.
- 🔍 Select the calculator — Choose "How to Use the Mortgage Recommender" from the calculator list. You will see default values already loaded so you can explore immediately.
- ✏️ Enter your values — Replace the defaults with your own numbers. The key fields are:
- Gross Monthly Income — Your total monthly income before tax.
- Property Type — Private property, HDB, or Executive Condo.
- Purchase Price — The total property price before additional costs.
- 📊 Review the results — The calculator updates instantly as you change any input. Key results are displayed in KPI cards and charts that update as you adjust inputs.
- 🔄 Run what-if scenarios — This is where the real power lies. Change one variable at a time to see its impact. For example, try increasing the interest rate by 1% or extending your holding period by 5 years. Note how the results shift.
- 💾 Compare and decide — Run 2-3 different scenarios and note the results. This gives you a range of outcomes to base your decision on, rather than relying on a single projection.
Worked Example
Real-World Scenarios to Try
Here are some realistic scenarios you can plug into the calculator right now. Each one reflects a common situation Singapore property buyers face.
| Scenario | Settings to Try | What You Will Learn |
|---|---|---|
| Conservative first-timer | Income: $8K, Low risk, Private | Recommended loan structure with maximum buffer against rate shocks |
| Aggressive investor | Income: $15K, High risk, Private | Maximum leverage strategy with higher risk tolerance |
| HDB buyer | Income: $6K, Moderate risk, HDB | Whether HDB loan or bank loan is recommended for your income |
Expert Tips and Common Pitfalls
💡 Pro Tips
- Use realistic assumptions — Singapore condo appreciation has historically averaged 2-4% per year. Avoid overly optimistic projections. When in doubt, use 3% as a baseline.
⚠️ Common Pitfalls
🤔 What-If Scenarios to Explore
Get the most value from this calculator by testing these scenarios:
- Run at least 3 scenarios — best case, base case, and worst case — to understand the full range of outcomes.
Related Calculators
Your property journey involves many interconnected decisions. These calculators work hand-in-hand with this one:
- How to Check TDSR and MSR Affordability
- How to Use the Mortgage Calculator
- How to Find Your Maximum Affordable Property Price
Ready to Crunch Your Numbers?
Answer a few questions about your income and goals. The wizard analyses all constraints and recommends the optimal loan structure — so you can walk into the bank prepared.
Official Sources
This how-to guide is auto-generated using ShiokNest's calculator defaults. All worked examples use default values — adjust inputs to match your personal scenario for accurate results.
How the matching logic weighs your inputs
Once your four inputs are collected, a recommender applies a scoring matrix rather than a simple filter. Rate type preference and holding horizon are cross-referenced first: if your horizon is under 30 months, the recommender immediately deprioritises any package whose lock-in period extends beyond your horizon, because a mid-tenor exit typically triggers a 1.5% prepayment penalty on the outstanding loan amount plus clawback of the legal subsidy (commonly SGD 1,800 to SGD 2,500). On a SGD 800,000 loan, that is a minimum SGD 14,300 friction cost — easily wiping out 18 months of rate savings between two competing packages.
For borrowers with longer horizons, the recommender shifts focus to the package's post-lock-in reversion rate and the bank's historical spread behaviour. A package offering 1.00% above SORA for years one and two with a 1.80% reversion in year three is inferior over a five-year hold to a package at 1.20% for years one to three with a 1.40% reversion, even though the headline rate is higher in the first year. The loan comparison calculator lets you model exactly this scenario by inputting two package schedules side by side and reading total interest cost over your chosen horizon.
HDB loan eligibility introduces a binary fork. If you are eligible (Singapore Citizen purchasing an HDB flat, income ceiling met, not owning private property), the recommender computes the annualised cost difference between the concessionary 2.6% on your loan quantum versus the bank package's projected all-in cost including the stress-buffer scenario. Because the HDB loan has no lock-in, its option value is high: if SORA climbs above 3.5% — which it briefly did in 2023 — a borrower on an HDB loan simply rides it out at 2.6% while a bank-loan borrower's floating rate surges. The recommender quantifies this downside protection and surfaces it as a "tail-risk premium" in the output.
TDSR headroom acts as a hard gate throughout. If your stress-tested monthly instalment on any floating package exceeds 55% of gross income, that package is eliminated from consideration regardless of rate attractiveness. The recommender then checks remaining fixed packages and, as a fallback, checks whether extending loan tenure reduces the instalment below the threshold. Use the mortgage calculator to model how different tenures affect monthly commitment before running the recommender, so you arrive with a realistic tenure range already in mind.
A worked example (as of 2026-06): a 35-year-old Singapore Citizen buying a four-room HDB resale flat at SGD 550,000, with gross household income of SGD 9,500 per month, existing car loan instalment of SGD 900, and a plan to hold the flat for at least 10 years before reviewing. The TDSR ceiling is SGD 9,500 × 55% = SGD 5,225 per month in total debt. After deducting the car loan, the maximum mortgage instalment is SGD 4,325. On a SGD 450,000 loan (assuming a SGD 100,000 CPF down payment) over 25 years, a 2.6% HDB concessionary rate produces an instalment of approximately SGD 2,035. The stress-test at 3.1% produces approximately SGD 2,163 — well within headroom. The recommender would flag: HDB concessionary loan is eligible, TDSR headroom is comfortable, long holding horizon reduces penalty risk, and the tail-risk protection of a no-lock-in loan outweighs the marginal rate saving of available bank packages. Recommended package type: HDB concessionary loan.
Step by step
- Gather your financial inputs. Collect your gross monthly income (all applicants combined if joint purchase), all existing monthly debt obligations (car loans, personal loans, other mortgages), your approximate purchase price, and your expected down payment. These four numbers determine your TDSR headroom before you evaluate any rate.
- Check HDB loan eligibility. Visit the HDB housing loan page to confirm whether you qualify for the concessionary rate. Eligibility depends on citizenship, income ceiling, and property type. If you qualify, calculate the concessionary cost first as your baseline before evaluating bank packages.
- Define your holding horizon and refinancing intent. Ask yourself honestly: will you sell within two years? Will you refinance within the lock-in period? If there is meaningful probability of either, set a maximum acceptable lock-in of 12 to 18 months. If you are confident of a 5-year-plus hold, you can accept a longer lock-in in exchange for a lower rate.
- Assess your rate view and risk appetite. If your household budget is tight and you need certainty, choose fixed over floating regardless of where rates are headed. If you have a cash buffer of at least six months of mortgage instalments and are comfortable with variability, a SORA-floating package may serve you better over a long horizon when rates trend down.
- Run the TDSR check. Use the TDSR calculator to confirm the maximum monthly instalment your income supports. Apply an additional 50 basis points to any quoted floating rate as a personal stress buffer before accepting the instalment as affordable.
- Model competing packages. Input at least two packages into the loan comparison calculator — one fixed, one SORA-floating — using their full rate schedules including reversion rates. Read total interest cost over your stated horizon, not just the first-year instalment.
- Factor in subsidy clawback. Ask each bank for the legal subsidy amount and the clawback schedule. A SGD 2,000 subsidy fully clawable in year one and partially clawable in year two effectively adds 25–30 basis points to the first-year all-in cost on a SGD 800,000 loan. Include this in your comparison.
- Use the mortgage calculator to set tenure. Open the mortgage calculator and test tenures at 20, 25, and 30 years. Identify the tenure at which the monthly instalment sits at roughly 35–40% of gross income — this gives you comfortable headroom below the TDSR cap while preserving optionality to make capital repayments.
- Shortlist and verify with banks. Once the recommender surfaces two or three package types, call each bank directly or work with a licensed mortgage broker to obtain in-principle approval and verify the latest board rates. Rates shift weekly and the recommender outputs should be treated as a directional shortlist, not a binding quote.
- Review the refinancing calculator before committing. Even if you plan to hold long-term, model what refinancing would cost at the end of your lock-in period. If the savings from switching packages in year three exceed the administrative costs, factor that decision point into your total cost comparison now.
Frequently asked questions
Is a SORA-floating package always riskier than a fixed-rate package?
Not necessarily. SORA-floating packages carry payment variability, but SORA is a transparent, transaction-based overnight rate published daily by MAS, which means it moves in line with genuine market liquidity conditions rather than a bank's internal board rate decisions. Fixed packages eliminate rate risk but introduce lock-in risk: if you need to sell, refinance, or make a large prepayment before the lock-in ends, the prepayment penalty and subsidy clawback can exceed any interest saving the fixed rate provided. Whether floating is riskier than fixed depends on your holding certainty and your cash buffer relative to the range of possible instalment movements over your lock-in window.
Can I switch from an HDB loan to a bank loan mid-way through my mortgage?
Yes. You can refinance from an HDB concessionary loan to a bank loan at any time, since the HDB loan carries no lock-in period or prepayment penalty. However, once you have refinanced to a bank loan you cannot return to an HDB loan for the same flat. This one-way gate makes the HDB loan a valuable option for buyers who are unsure of the rate environment: they can start on the stable 2.6% concessionary rate and switch to a bank package if rates fall significantly below that level. Before switching, calculate the total cost of the bank package over your remaining tenure including any legal fees, using the loan comparison tool to confirm the switch is worthwhile.
What is the TDSR stress test and how does it affect which loan I can take?
MAS requires banks to stress-test mortgage applicants at a rate 50 basis points above the prevailing medium-term rate used in the bank's TDSR calculation, ensuring you can service the loan even if rates rise. The total debt servicing ratio must remain at or below 55% of gross monthly income under this stressed scenario. In practical terms, if the stress-tested instalment on a floating package would breach the 55% ceiling even though today's instalment would not, the bank cannot offer you that package at your requested loan quantum. You would need to either increase income, reduce other debts, lower the loan amount, or extend the tenure to bring the stressed instalment within limits. The TDSR calculator at /calculator/tdsr applies this logic so you can identify your maximum affordable loan before approaching any bank.
How does the recommender handle borrowers with multiple existing loans?
A mortgage recommender sums all existing monthly debt obligations — car loans, renovation loans, personal loans, other mortgages — to compute your residual TDSR headroom before assigning any mortgage instalment. If your existing obligations already consume 30% of gross income, you have only 25 percentage points of TDSR capacity remaining for the new mortgage. The recommender uses this residual to back-calculate the maximum loan quantum at various tenures and rate assumptions, then filters out packages whose stress-tested instalment exceeds the residual. This often produces a recommended loan quantum that is meaningfully lower than the bank's nominal maximum, which is an important planning input if you have not yet signed an option to purchase.
How often should I review my mortgage package after taking it out?
The standard advice for Singapore borrowers is to review annually and to take action at the end of every lock-in period, which is typically every two to three years. At each review, compare your existing reversion rate against new package offers using the refinancing calculator at /calculator/refinancing, which quantifies whether the interest saving over the next lock-in period exceeds the refinancing legal fee (typically SGD 1,800 to SGD 2,500). Even a 30-basis-point saving on a SGD 600,000 outstanding loan generates approximately SGD 1,800 per annum, so the break-even is often reached within the first year of a new package. Additionally, if your income has risen materially since origination, re-running the TDSR check may reveal you are eligible for a larger loan quantum or a better package than you could access at inception.