All insights

CPF & Property · 2026

Should you use cash or CPF for your monthly mortgage?

By Winfred Quek · 9-minute read · Last reviewed May 2026

Facts verified: May 2026 · Sources linked below

Once you own a home, the bank does not care whether the monthly instalment is paid from cash or from your CPF Ordinary Account. Both clear the debt. But the two routes leave you in very different positions years later. This is one of the most consequential small decisions in Singapore property, and most people make it without thinking.

Here is the trade-off, and a framework to decide.

What does paying with CPF actually cost?

CPF money is not free money. According to the CPF Board, when you use CPF Ordinary Account savings for a property, the amount used accrues interest at the OA interest rate -- 2.5% a year -- and that accrued interest compounds. When you eventually sell the property, the CPF principal you used plus all that accrued interest must be returned to your CPF account before you receive your cash proceeds.

So paying the mortgage with CPF does not make the cost disappear. It moves the cost. Instead of paying cash now, you create a 2.5% compounding liability that lands on your sale proceeds later. The money still leaves your pocket -- just at a different time, and grown.

What does paying with cash give you?

Pay the mortgage in cash and your CPF OA stays put, compounding at 2.5%, untouched. Your accrued-interest bill at sale is smaller because you used less CPF. When you sell, more of the sale price flows through as cash because less has to be diverted back into CPF.

The cost is obvious: cash leaving your account every month, cash you might want for emergencies, investments, or simply liquidity. Cash has option value. CPF does not -- it is locked into the CPF system's uses.

CPF OA interest 2.5%/yr per the CPF Board. Outcomes depend on holding period and amount used.

Why the maths favours cash at low mortgage rates

Here is the part most people miss. With bank mortgage rates around 1.5% in 2026, the comparison is not "CPF vs cash" in isolation -- it is what each pool of money earns.

If you pay the mortgage in cash and leave the money in CPF OA, that CPF money compounds at 2.5%. Meanwhile your mortgage costs only about 1.5%. You are effectively keeping money in a 2.5% account while owing on a 1.5% loan -- a positive spread. Drain the CPF to pay the loan and you give up that 2.5% earner and create a 2.5% liability, to save 1.5% of loan interest. That trade is arithmetically poor.

This is the same logic behind topping up CPF versus paying down your mortgage -- when the mortgage rate is below the CPF rate, keeping money in CPF wins on the numbers. Note this can flip: if mortgage rates rise well above 2.5%, the calculus changes.

When does paying with CPF still make sense?

Cash is not always king. CPF is the right call when:

• Cash is genuinely tight. If paying cash would leave you without an emergency buffer, use CPF. Liquidity stress is a worse outcome than accrued interest.
• You have a better use for the cash. If your cash can be deployed at a return clearly above 2.5% after risk, keeping cash liquid and using CPF can be rational -- though "clearly above 2.5% after risk" is a high bar.
• Income is uneven. Self-employed or commission-based earners may prefer CPF for the mortgage to keep cash flexible across lean months.
• You do not plan to sell. If you genuinely intend to keep the property indefinitely, the accrued-interest "bill at sale" is less pressing -- though it still matters for your estate and any future refinancing.

Frequently asked questions

Is it true that paying with CPF "costs more"?

It does not cost more in the literal sense -- but it leaves you with a larger accrued-interest bill at sale and a smaller CPF balance growing at 2.5%. Compared with paying cash while leaving CPF to compound, using CPF is the weaker outcome when the mortgage rate is below 2.5%.

Can I switch between cash and CPF later?

Yes. You can change how you service the loan over time. Some owners use CPF in lean years and cash in stronger years. Confirm the administrative steps with your bank or HDB and the CPF Board.

Do I have to pay back accrued interest if I never sell?

The accrued interest is only "called" when the property is sold or transferred. If you hold for life, it forms part of the eventual settlement on the property -- relevant for your estate and any future refinancing rather than a monthly cost.

Does this apply to HDB and private property?

The accrued-interest mechanic applies to CPF OA used on both HDB and private property. The framework here holds for either.

What if mortgage rates rise above the CPF rate?

Then the spread flips. If your mortgage costs clearly more than the 2.5% CPF OA rate, the case for keeping money in CPF weakens and reducing the loan becomes more attractive. Re-run the comparison whenever your rate resets.