You Sold the Flat for $620,000. Here's Why You Walk Away with $120,000.

Raymond and Pauline did everything the conventional way. They bought a four-room flat in a mature estate in 2011 for $420,000, took an HDB loan, and paid it down with their CPF for fifteen years. This month they sold for $620,000 — a $200,000 gain on paper, a flat that more than held its value. So when the lawyer's statement showed them walking away with roughly $120,000 in cash, not the half-million they'd half-expected, it landed like a penalty. It isn't one. It is CPF accrued interest doing exactly what it is designed to do, and it is entirely knowable before you ever list. Here is every dollar, traced.

Raymond and Pauline are a composite — a profile built from typical figures, not real clients. The assumptions are stated; the workings below are the real calculations for those assumptions.

The rule: the money you used keeps earning — and you owe that too

When you use CPF Ordinary Account (OA) savings to buy a home, you are spending money that would otherwise have sat in your OA earning 2.5% a year. CPF's rule is simple and consistent: when you sell, you must refund the principal you withdrew plus the interest it would have earned had it stayed in the account — the accrued interest — back into your CPF. It applies to everything you funded with CPF: the downpayment, stamp and legal fees, every monthly loan installment, and any housing grant. The longer you've owned, the larger the accrued-interest figure grows, because it compounds.

The crucial word is refund, not deduction. The money is not taxed away or lost. It is moved from the sale proceeds back into your own CPF, where it resumes earning 2.5%. But it lands in your CPF, not your bank account — and that distinction is the entire gap between the price on the signboard and the cash in your hand.

Raymond and Pauline's numbers, line by line

Over fifteen years they used their OA in two streams. At purchase, the downpayment plus stamp duty and legal fees drew about $48,000 from OA. Then the monthly loan installment — roughly $1,500 a month, paid entirely from OA — ran for 180 months, another $270,000. Total CPF principal withdrawn: $318,000.

Now apply the accrued interest. The $48,000 used at the start has been compounding at 2.5% for the full fifteen years; each monthly installment compounds from the month it was paid. Run the whole schedule and the interest comes to about $79,000. So the amount that must return to CPF on completion is $318,000 + $79,000 = $397,000.

Against the sale, the cash math is then mechanical:

A $620,000 sale, a genuine $200,000 paper gain, and about $120,000 of cash at the end of it. Nothing went wrong. The $397,000 simply went where the rules always said it would — back into Raymond and Pauline's CPF.

Why it is not the loss it feels like

The number stings because most people anchor on the sale price minus the loan and quietly forget the CPF they spent a decade feeding into the flat. But three things are worth holding onto before treating $120,000 as the "real" outcome.

First, the refund is still their money. The $397,000 is sitting in their CPF OA, earning 2.5% — a better risk-free rate than most cash savings. Their total position after the sale is roughly $397,000 in CPF plus $120,000 in cash, about $517,000, not $120,000.

Second, the refund can fund the next home. If they buy again, that OA balance is available for the next downpayment and installments. The cash-versus-CPF split changes what form their proceeds take, not whether they can keep housing themselves. For an upgrader, the refund is feedstock for the next purchase, not money parked out of reach.

Third, the accrued interest is the price of having used CPF instead of cash. They got to buy in 2011 without finding $318,000 in cash, and the 2.5% is what that convenience cost. It is the same 2.5% they would have earned had the money stayed put — so in CPF terms they are square. The discomfort is purely that retirement money and spendable cash are not the same thing.

What this changes about how you plan

The accrued-interest refund is unavoidable, but being surprised by it is not — and the surprise is where the bad decisions happen. A seller who budgets the next purchase, or a renovation, or a retirement plan around "sale price minus loan" is working with a number that can be $200,000 or $300,000 too high.

Two practical moves follow. Before you sell, pull your exact accrued-interest figure — CPF shows the principal-plus-interest you'll owe back in your statement, and the CPF refund page explains the mechanics — so the cash figure is the one you actually plan around, not a guess. And if your goal is cash, recognise that a long-held, CPF-funded flat converts most of its value back into CPF on sale; the buyers who walk away with large cash sums are usually those who funded more of the purchase in cash, or who are downsizing and not buying again. If you are 55 or older, note one more wrinkle: the refund is first used to top up your Retirement Account to your required sum, and only the balance stays in OA — so the cash-out can be smaller again.

Raymond and Pauline didn't lose $397,000. They moved it from a flat back into their CPF, exactly as the system intends, and they still cleared a real gain. What they nearly did was plan their next step around a number that was never going to arrive in cash. The accrued interest isn't the penalty. Finding out about it at the lawyer's office is.

Sources: CPF — using your CPF to buy a property; CPF — refund when selling or transferring property. OA interest rate (2.5% p.a.) and the principal-plus-accrued-interest refund rule as at June 2026; principal, accrued interest, and cash figures computed for the stated assumptions.

Raymond and Pauline are an illustrative composite, not real clients. Silas Tan is a District Director at Huttons Asia and co-founder of TRIBE. He built the Resale Project Scorecard (RPS) using 126,000+ URA REALIS transactions. This article is for informational purposes and does not constitute financial or investment advice. CEA Registration R000303I.