What is a property safety net?

It is the cushion you hold after buying a home: the cash and reserves that keep the mortgage and housing bills paid if your income stops. This calculator measures it two ways — how many months your cash lasts with no job, and how much cash you accumulate over four years if you keep working.

How many months of reserves should I have after buying?

There is no official rule, but many financial planners suggest 6–12 months of total housing outlay (instalment plus maintenance and property tax) in accessible reserves. This tool shows your actual runway so you can judge it against your own risk tolerance and job security.

Does CPF OA count towards my safety net?

Partly. CPF Ordinary Account can service the mortgage instalment, but it cannot pay maintenance or property tax and is not spendable cash. So the headline runway here is cash-only — surplus cash proceeds plus cash savings — and CPF OA is shown separately as a figure that extends the runway if you draw it down for the loan.

Why does this tool not check TDSR?

Because it assumes the purchase and loan are already in place. TDSR, MSR and LTV decide whether you can borrow in the first place — those belong in the Affordability Assessment. The Safety Net Calculator is about resilience after the deal closes. Gross income here is used only to set the loan tenure via the income-weighted average age.

What is the difference between Sell & Buy and Pure Buy?

In a Sell & Buy, you fund the purchase partly from the surplus cash proceeds of selling your existing home, so that surplus adds to your buffer. In a Pure Buy there is no sale, so the buffer is just your cash savings (CPF OA shown separately). Pick the mode that matches your situation.

Safety Net Calculator

How long your cushion lasts if you lose your job — and how much cash you build over four years if you don’t.

Count the bills TDSR ignores.Loan approval only sees commitments in your Credit Bureau report — not a parent’s allowance, school fees, a helper’s salary or insurance. Add those under Other expenses so your runway is real.

Your sale

What the existing home returns to you.

Selling price

Outstanding loaniThe loan still owed on the property, redeemed on completion.

Agent commission %i9% GST is added automatically.

Legal fees

Other costs

CPF to refundiCPF used + accrued interest, returned to your OA — not cash.

Net cash proceeds$0

CPF returned to OA$0

Your purchase

The new home, its loan and upfront costs.

Purchase price

LTV %iThe loan you took, as a % of the price.

Buyer profileiDrives ABSD — citizen, PR or foreigner.

Properties ownediResidential properties you already own — drives ABSD.

Legal / conveyancing

Other buying costsiValuation, mortgage stamp duty, misc.

Loan (75%)$0

Downpayment$0

Stamp duty (BSD $0)$0

Total upfront$0

On a private resale the stamp duty is fronted in cash (within 14 days of exercising), then reimbursed to your CPF OA after completion — so it nets back to CPF, which is how the buffer below treats it. Keep that cash on hand for the bridge.

Loan, monthly costs & buyers

Loan interest %iYour actual mortgage rate, % per year.

Maintenance / mo

Property tax / moiAuto-estimated for own-stay from the property's annual value (≈3.5% of price) at IRAS owner-occupier rates. Edit to override.

Other expenses / moiInsurance, a parent's allowance, school fees, a helper's salary — the monthly bills TDSR doesn't see.

Buyer 1 — age

Buyer 1 — gross / moiUsed only to set the loan tenure (income-weighted average age).

Your reserves

Extra cash savingsiCash on top of the sale proceeds.

Renovation budgetiCash set aside for reno — taken out of your buffer.

Current CPF OA balanceiCan service the mortgage, but not maintenance or tax — a reference, kept out of the cash runway.

If you keep your job · 4-year view

Nett take-home salary in cashiYour monthly pay after CPF deduction. Required for the 4-year projection.

CPF OA contribution / moiHelps service the instalment while you're working.

What’s left after the move

Funds from sale (cash + CPF)$0

Total upfront for purchase− $0

Cash surplus

CPF (OA) left after

This is a resilience tool, not a loan-qualification check — TDSR/MSR live in the Affordability Assessment. Gross income here only sets your loan tenure. Selling first? The Sale Proceeds tool breaks down the sale side in detail.

How this calculator works

The safety net is what stands between you and trouble after the keys are handed over. This calculator assumes the purchase and loan are already done, and answers two questions a banker would not — because they are about life after the deal, not approval before it.

One — the no-job runway.If your income stopped the day you moved in, your CPF contributions would stop too, so the buffer is static. The headline figure is deliberately cash-only: surplus cash proceeds (in a Sell & Buy) plus cash savings, divided by the full monthly outlay — instalment plus maintenance plus property tax. CPF Ordinary Account can legally service the mortgage, so a second figure shows the longer runway if you draw OA down for the loan; but OA cannot pay maintenance or tax and is not spendable cash, so it is kept out of the headline.

Two — the four-year position if you keep working. Each month your net take-home income plus your CPF OA contribution go towards the instalment and housing bills; whatever is left accumulates as cash. Over 48 months that is your starting cash buffer plus 48 times the monthly surplus. Net take-home income is required for this view — it is a different number from the gross income used to set your loan tenure, and leaving it out would understate the result.

Tenure. The loan tenure is the income-weighted average age of the borrowers subtracted from 65, capped at 30 years — the same max-LTV basis the banks use. A younger co-borrower with real income lengthens the tenure and lowers the instalment.

For whether you can borrow in the first place — TDSR, MSR and LTV — use the Affordability Assessment.

A worked example

A Singapore Citizen aged 44 sells a $730,000 home (no loan left, 2% agent fee, $489,000 of CPF to refund), netting $223,006 in cash with $489,000 back in CPF — $712,006 in all. They buy a $2,000,000 home on a 75% loan, needing $572,100 upfront (downpayment plus $69,600 stamp duty and fees). Settling 5% in cash and the rest from CPF, the genuine cash leftover is about $122,500, with roughly $87,400 still in CPF OA. At a 1.8% rate the monthly outlay is $7,852, so the cash-only runway is about 15.6 months; letting CPF OA also service the mortgage stretches it to about 27 months. Keep working on $10,520 net take-home and they add about $4,188 of cash a month — roughly $324,000 after four years. The same purchase as a pure buy simply drops the sale side and uses the cash and CPF they keep on hand.

Frequently asked questions

What is a property safety net?: It is the cushion you hold after buying a home: the cash and reserves that keep the mortgage and housing bills paid if your income stops. This calculator measures it two ways — how many months your cash lasts with no job, and how much cash you accumulate over four years if you keep working.
How many months of reserves should I have after buying?: There is no official rule, but many financial planners suggest 6–12 months of total housing outlay (instalment plus maintenance and property tax) in accessible reserves. This tool shows your actual runway so you can judge it against your own risk tolerance and job security.
Does CPF OA count towards my safety net?: Partly. CPF Ordinary Account can service the mortgage instalment, but it cannot pay maintenance or property tax and is not spendable cash. So the headline runway here is cash-only — surplus cash proceeds plus cash savings — and CPF OA is shown separately as a figure that extends the runway if you draw it down for the loan.
Why does this tool not check TDSR?: Because it assumes the purchase and loan are already in place. TDSR, MSR and LTV decide whether you can borrow in the first place — those belong in the Affordability Assessment. The Safety Net Calculator is about resilience after the deal closes. Gross income here is used only to set the loan tenure via the income-weighted average age.
What is the difference between Sell & Buy and Pure Buy?: In a Sell & Buy, you fund the purchase partly from the surplus cash proceeds of selling your existing home, so that surplus adds to your buffer. In a Pure Buy there is no sale, so the buffer is just your cash savings (CPF OA shown separately). Pick the mode that matches your situation.

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Estimates for planning only — not financial, tax, accounting or legal advice, and not an offer or approval for any loan. Results depend on your inputs and simplifying assumptions; policies and rates change. Verify all figures with your banker, lawyer and the relevant agencies (IRAS, HDB, CPF Board). TRIBE accepts no liability for any loss arising from use of this tool.

Disclaimer

The tools on this page provide estimates for general reference only and do not constitute financial, legal, tax, or investment advice. Calculations are based on prevailing MAS, IRAS, HDB, and CPF rules and rates at the time of publication, which may change without notice. Actual figures — including loan eligibility, interest rates, stamp duties, and CPF usage — depend on your specific circumstances and the final assessment of banks, IRAS, and other relevant authorities. TRIBE makes no warranty as to the accuracy or completeness of any output and accepts no liability for decisions made in reliance on these tools. Please verify all figures with the relevant institutions or a qualified professional before committing to any transaction.