Nexus Mortgage SG  ·  22 May 2026  ·  9-minute read

CPF Accrued Interest on Property Sale (2026): Why Your Cheque Is Smaller

By Dan Ler, Mortgage Advisor

The Cheque Shock: Why Sellers Get Less Than They Expected

I get this phone call at least once a month. “I just sold my flat for $850,000 and walked out of the completion office with $40,000. What happened?” The answer is almost always CPF accrued interest. The seller worked out their cash as sale price minus the outstanding loan, and forgot the third line. There’s a CPF refund waiting to be paid first.

What CPF Accrued Interest Is (and Is Not)

CPF accrued interest is the interest your CPF Ordinary Account (OA) would have earned if you had not withdrawn it to finance your property. It is calculated at 2.5% per annum, monthly compounded, on every dollar of OA used, from the date of withdrawal to the date you sell.

A few things it is not:

• It is not a penalty or fine. CPF charges you nothing. This is bookkeeping.
• It is not money that disappears. The refund goes back to your own CPF account, not to the government.
• It is not the HDB concessionary loan rate. That one is 2.6% and it is computed differently (more on this below).
• It is not optional. You cannot waive the refund.

On sale, CPF instructs the conveyancing lawyer to deduct the Principal + Accrued Interest (commonly written as P + I) from sale proceeds before paying cash to the seller. The full mechanics are on the CPF refund-on-sale page.

2.5% vs 2.6%: the Rate That Everyone Confuses

The two numbers look almost identical and sit next to each other in the same housing context. They are not the same thing.

When you take an HDB loan and pay the instalments from CPF OA, two things happen at once. You pay HDB 2.6% on the loan balance, and you accrue 2.5% on every OA dollar you spent. They are two separate obligations on two different bases. Mix them up and your cashflow planning will be off.

The Formula and a Quick Worked Computation

Monthly compounding turns a 2.5% rate into a 28.4% factor over 10 years.

The exact CPF formula:

Accrued Interest = Principal × (1 + 0.025/12)ⁿ − Principal

where n is the number of months between the OA withdrawal and the date of sale. CPF compounds monthly.

Quick check at common horizons

Hold for 25 years and the accrued interest comes to 87% of the principal you withdrew. That compounding factor is the number worth remembering.

Calculator: Estimate Your CPF Accrued Interest

Enter the CPF Ordinary Account you used and how long you hold the property. It compounds at 2.5% a year, monthly, the same way CPF does, and shows what gets refunded to your OA on sale.

Estimate only, monthly-compounded at the 2.5% CPF OA rate. Your exact figure is in your CPF statement; CPF Housing Grants and Home Protection Scheme premiums paid from OA also accrue.

What Counts as “Principal Withdrawn”

It is not just the downpayment that accrues. CPF tracks every dollar of OA used against the purchase. That includes:

• The CPF portion of the downpayment (up to 20% of price for bank-loan buyers, up to 25% for HDB-loan buyers since the 20 August 2024 alignment).
• Buyer’s Stamp Duty (BSD), if you paid it from CPF OA.
• Additional Buyer’s Stamp Duty (ABSD), where it applies and was paid from CPF.
• Legal fees paid from CPF OA.
• Monthly mortgage instalments paid from CPF OA. Each instalment starts accruing from the month it was withdrawn.
• Home Protection Scheme (HPS) premiums paid from OA.
• CPF Housing Grants received, for HDB resale buyers. These attract accrued interest too, even though you never “put them in” yourself.

For most owners, the running total over 10 to 15 years is a lot bigger than the upfront figure they remember signing for at OTP.

HDB Worked Example: S$700K Resale, 10-Year Hold

Inputs

A Singapore Citizen couple buys a S$700,000 HDB resale flat in 2026 with an HDB concessionary loan. They take a 25-year tenure and are age 32 at purchase. CPF OA pays the full 25% downpayment, the BSD and every monthly instalment. They sell the flat 10 years later at S$1,000,000.

CPF principal used over 10 years

Accrued interest at sale (year 10)

The upfront S$193,100 (downpayment, BSD and legal) accrues for the full 10 years at the 28.4% compound factor, which works out to ~S$54,840. The S$286,000 in instalments has an average exposure of roughly 5 years, since the early dollars compound longer than the late ones, so its accrued interest is about ~S$38,100. Total accrued: ~S$93,000.

Sale-day waterfall (illustrative)

The seller paid S$700,000 a decade ago and sold for S$1,000,000. That is a 43% gross gain. Yet their cash at completion is S$73,400. The rest, S$572,100, sits in their CPF OA. The wealth is preserved. It has just moved from liquid cash into a restricted CPF balance.

Private Property Worked Example: S$2M Condo, 10-Year Hold

On a private condo sale, the CPF refund often comes in well below what sellers expected to pocket.

Inputs

A Singapore Citizen couple buys a S$2,000,000 private condo in 2026 with a bank loan at 75% LTV and a 25-year tenure. CPF OA pays the 20% non-cash portion of the downpayment, with the other 5% in cash, plus BSD and legal fees. The bank instalments are paid entirely from cash. That is a deliberate choice to keep cash working, and it is common at this quantum. They sell after 10 years at S$2,400,000.

CPF principal used at start (no ongoing additions)

Accrued interest at sale

Full 10-year exposure at the 28.4% factor: ~S$134,220. Total refund obligation: ~S$606,820.

Sale-day waterfall

This seller’s cash position is healthier than the HDB seller’s, simply because they paid instalments from cash instead of OA. The trade-off was tighter monthly cashflow during the hold, and cash that didn’t earn the 2.5% CPF return along the way.

The Real Opportunity Cost Is Liquidity

People often call accrued interest a “loss” in casual conversation. It isn’t. The refund just moves money from your cash bucket into your CPF Ordinary Account bucket. The refund mechanic on its own leaves your net wealth at sale unchanged.

What changes is the form your money takes. Before the sale, your equity is locked inside the property with the accrued obligation sitting over it. After the sale, some of that equity goes back to OA, locked at 2.5% and subject to post-55 withdrawal rules, and the rest comes out as cash.

The real opportunity cost has two parts. The first is liquidity. Cash sitting in OA cannot be put toward a new property as freely as cash in a savings account, so if you plan to upgrade or buy a second property soon after selling, this matters. The second is the return spread. If you could have invested that cash above 2.5%, in REITs, indexed equities or your own business, then the OA return is a drag. If your alternative is below 2.5%, like bank savings or short bonds, OA is actually competitive.

The Pay-Down-With-OA Trap When Rates Are Below 2.5%

This sounds backwards, but it holds up. Every dollar in OA earns 2.5%. Every dollar you use to settle a 1.40% bank loan stops earning that 2.5% in exchange for wiping out a 1.40% interest charge. The net effect is minus 1.10% per dollar per year.

The decision flips once the loan rate climbs above the OA rate. Here is how the common cases line up.

• On a 1.40% bank fixed loan against a 2.5% OA, do not pay down with OA. Keep paying with cash and let OA compound. See our live 16-bank rate comparison.
• On a 2.6% HDB concessionary loan against a 2.5% OA, the spread is only 10bps, so it is roughly neutral. Whether you prefer OA comes down to your liquidity needs.
• On a 3.5% to 4.5% post-lock-in board rate against a 2.5% OA, paying down with OA is the right call. The bigger win is to refinance before the board rate kicks in.

Five Mitigation Moves Before You Sell

1. Make voluntary refunds during ownership. Putting cash into OA against the accrued interest stops the compounding clock on that portion. It works well if you have idle cash earning less than 2.5% elsewhere.
2. Use cash, not OA, for the monthly instalments. Every dollar you pay in cash is an OA dollar that doesn’t get withdrawn, so it never accrues. This suits borrowers with healthy cash flow.
3. Refinance to a lower bank rate. A lower monthly means less OA drawn each month, which means a smaller accrued-interest base. It also frees up cashflow, giving you more room to choose cash over CPF. See our refinance timing guide.
4. Plan the sale year, not just the sale. Selling within the SSD holding period adds a separate cost on top. The post-4-July-2025 SSD reset charges up to 16% in Year 1, and the two costs together can eat through the proceeds you were counting on.
5. Model the sale waterfall before you list. Use the Nexus affordability and funds-position calculator to walk through your cash versus OA position at sale.

If You Are 55 or Older at Sale

The refund works differently after age 55. Per the CPF guidance on sale proceeds, a post-55 refund first tops up your Retirement Account (RA) to meet the prevailing Full Retirement Sum, or the Basic Retirement Sum if the property is pledged for that. Only the balance after that flows back to OA.

A few things follow from this.

• If you are short of the Full Retirement Sum, the CPF refund effectively gets locked into RA. You cannot freely withdraw it.
• For downsizers selling a private property in retirement, the cash-on-sale figure can come in much lower than expected.
• Work out your FRS gap before you sell. Voluntary cash top-ups to RA ahead of the sale can take some of the sting out of it.

Three Moves Before You List

1. Pull your CPF Property Withdrawal Statement from the CPF Board portal. It shows the total OA principal used to date plus the running accrued interest, and the number is usually bigger than sellers remember.
2. Run the sale waterfall. Take the sale price, subtract the outstanding loan, then subtract the CPF (P + I), and you have your expected cash. Compare that against what you assumed. If the gap makes you uncomfortable, voluntary refunds during ownership or a cash-funded final 12 months of instalments can narrow it.
3. Re-check any “pay-off-with-CPF” plan against today’s rates. If your bank rate is below 2.5%, paying down with OA destroys wealth. If it is above 2.5%, or you are on a board rate, the logic reverses.
4. Download the full report. The Singapore Mortgage Free Report bundles your funds-position card (cash and CPF needed versus available), the TDSR/MSR check at the MAS 4% stress floor, the LTV/IWAA tenure trade-off, your purchase or refinance timeline and a 16-bank rate comparison in one PDF.

Frequently Asked Questions

CPF accrued interest is the interest your CPF Ordinary Account (OA) would have earned at 2.5% per annum, monthly compounded, had you not withdrawn the funds to finance your property purchase. It is computed on every dollar of CPF OA used for downpayment, Buyer's Stamp Duty, legal fees, monthly mortgage instalments and Home Protection Scheme premiums. On sale of the property, the principal CPF used plus the accrued interest must be refunded to CPF before sale proceeds are paid to the seller.

2.5% per annum. It mirrors the CPF Ordinary Account interest rate. The 2.6% figure is the HDB concessionary loan rate, pegged at CPF OA + 0.10%. The two rates are commonly confused. Accrued interest is what OA would have earned (2.5%); HDB loan interest is what HDB charges on the loan (2.6%). They are computed on different balances and accrue at different rates.

Yes. CPF accrued interest applies to any residential property — HDB resale, BTO, Executive Condominium, private condominium or landed — whenever CPF Ordinary Account funds are used. Private property buyers typically use CPF OA for the 20% non-cash portion of the downpayment, BSD, legal fees and monthly bank-loan instalments. Every dollar of OA used accrues at the 2.5% rate from withdrawal to the date of sale.

The formula is: Accrued Interest = Principal × (1 + 0.025/12)^n − Principal, where n is the number of months between withdrawal and sale. CPF calculates it monthly and compounds. Example: S$200,000 withdrawn for 10 years (120 months) accrues approximately S$56,800 in interest, totalling S$256,800 to be refunded to OA on sale.

No. The refund moves money from your cash sale proceeds back into your CPF Ordinary Account. The wealth is preserved — but it changes form. Cash on hand drops; OA balance rises. The true cost is liquidity: post-55 withdrawal rules cap how much of that OA balance can be drawn freely, and the cash you might have invested elsewhere at greater than 2.5% return is now locked at the 2.5% OA rate.

In 2026, bank loan rates start from 1.40% p.a. fixed, while CPF OA earns 2.5%. Paying off a 1.40% loan with OA destroys roughly 1.10% per year of net wealth — you give up 2.5% OA growth to eliminate 1.40% loan interest. Most borrowers should service the loan with cash where possible and let CPF compound. The calculation flips only when the loan rate exceeds the CPF OA rate (e.g. on the post-lock-in board rate of 3.5–4.5%, or on the 2.6% HDB concessionary loan).

If the seller is aged 55 or above at the date of sale, the CPF refund is first used to top up the Retirement Account (RA) to meet the prevailing Full Retirement Sum (or Basic Retirement Sum if applicable). Only the balance after RA top-up returns to the Ordinary Account. This further reduces post-55 cash flexibility because RA balances are not freely withdrawable.

About the author — Dan Ler has advised on Singapore home loans since 2017 at Nexus Mortgage SG, an independent brokerage comparing 16+ MAS-regulated lenders. Nexus has facilitated 500+ home loans across HDB, EC, private condo and landed property segments. Banks pay Nexus on disbursement, so there is no cost to the borrower.

Nexus Mortgage SG is an independent Singapore mortgage advisory. This article is general information, not financial or tax advice. CPF rules are administered by the Central Provident Fund Board and can change. Worked examples use illustrative figures and round numbers; your actual CPF Property Withdrawal Statement is the authoritative reference for your specific case. Figures reflect CPF Q2 2026 published OA interest rate (2.5% floor) and 2026 MAS/IRAS positions. Sources: CPF Refund on Sale, CPF Sales Proceeds Guide, CPF Interest Rates Q2 2026, IRAS BSD, HDB CPF Housing Grants.