Sarah Chen
A couple in their mid-30s sold their Clementi DBSS flat, Trivelis, for $710,000 the moment they hit their minimum occupation period (MOP), then bought a $1.7M two-bedroom unit at The Interlace. The case study is instructive (Stacked Homes, June 2026), but the part most upgraders underestimate is not which condo to buy. It is how the money actually moves on completion day.
This piece walks through both: the upgrade decision, and the financing mechanics that trip up nearly every first-time private buyer.
The couple spent a year searching and ran a data-backed comparison across 11 shortlisted developments before settling on The Interlace. The discipline matters more than the specific tool. An upgrade from HDB to private property is usually the largest single financial decision a household makes, and a year of looking is not indulgence. It is what stops you from anchoring on the first showflat.
The sale price of $710,000 on a Trivelis unit, set against a $1.7M purchase, frames the real question for upgraders: where does the gap come from, and how much of it has to be cash.
Under the standard loan-to-value (LTV) limit of 75% for a first mortgage, the numbers on a $1.7M home break down like this:
That 5% minimum cash component is the figure to plan around. It is non-negotiable and it is paid early, typically when you exercise the option to purchase (OTP). The rest of the downpayment falls due at completion, which for a resale private purchase is usually 10 to 12 weeks after the OTP is exercised.
Note that this is the LTV math, separate from your borrowing limit. Whether you can actually take the full 75% depends on Total Debt Servicing Ratio (TDSR), which caps total monthly debt obligations at 55% of gross income. Run that calculation before you fall in love with a unit.
Here is the question that surfaces again and again, most recently from a newly-PR couple buying with a joint DBS mortgage and around S$60,000 combined in CPF OA (Reddit r/singaporefi, June 2026). They had exercised their OTP and were three months from completion, and they did not know whether their OA would be disbursed at closing alongside the cash, or whether they had to pay everything in cash first and claim it back afterwards.
The answer: CPF OA is disbursed at completion, not reimbursed after. You do not need to front the OA portion in cash.
The mechanism runs through your conveyancing lawyer. Once you appoint them, they submit your CPF withdrawal application to the CPF Board, and the funds are released to coincide with the completion date. On the day, the lawyer assembles the full purchase price from three sources: your CPF OA, your cash, and the bank's loan disbursement. The seller receives one clean settlement.
So your job before completion is to make sure two things are ready: enough cash for the minimum 5% (already paid at OTP) plus any cash top-up beyond what OA covers, and a correctly filed CPF withdrawal through your lawyer. Get the lawyer the instruction early. A late or incorrect CPF submission is one of the few things that can stall a completion.
For the S$60,000-OA couple on a $1.7M-equivalent purchase, the OA would not cover the full 20% balance (S$340,000 on that price). It chips away at the cash requirement rather than eliminating it. That is the realistic position for most upgraders: CPF reduces the cash you front, it rarely removes it.
The upgrade story works in this order, and the financing has to keep pace with it:
The condo you choose is the visible decision. The financing sequence is the one that determines whether completion day is routine or fraught. Plan the second with the same year of care you give the first.
A Building Under Construction (BUC) loan is paid out by the bank to the developer in stages as construction progresses, so buyers' monthly instalments start low and rise sharply, especially at TOP when 25% of the price is disbursed at once. Buyers need about 20% of the price plus stamp duty ready in cash or CPF within eight weeks of booking, loans carry only floating rates until TOP (with limited free conversions), and names on the Sale and Purchase Agreement are hard to change once signed.
Buying an HDB flat on $3,000 a month is possible because the purchase depends on three ordered factors: how much you can borrow based on income (set by MSR and TDSR caps), which CPF housing grants you qualify for as a single buyer, and how much your CPF Ordinary Account can cover for the remaining balance. For a $3,000 earner, the income-based instalment cap of $900 a month limits the loan to roughly $198,000, while grants of $40,000 to $100,000 and CPF Ordinary Account funds can cover the rest of a flat like a $330,000 Yishun unit without needing cash savings.
Ethan Ng·29 Oct 2026© 2026 Cashew. All rights reserved.
