Insights

IPA to OTP: The Clocks Nobody Explains

Between the in-principle approval and the signed sale agreement sit five separate deadlines, most of them running at once. The one that actually breaks purchases is the eight-week clock — and it starts before the buyer has seen the contract.

By TRIBE Editorial · 30 July 2026 · 9 min read

Nobody gets confused about the order of a property purchase. Approval, booking, contract, signature — everyone can recite it. What catches buyers out is that these are not four steps in a queue. They are five clocks, several of them running simultaneously, started by different events, and only one of them cares whether your bank has finished its paperwork.

On a S$1.68m new launch, the buyer who books on a Saturday afternoon has committed to finding roughly S$389,600 in cash and CPF within eight weeks. That figure is knowable on booking day. It is almost never stated on booking day.

The IPA is not a clock. It's a snapshot.

An in-principle approval is the bank's preliminary view of how much it will lend, based on a real credit-bureau pull and a real TDSR computation — not the softer "pre-qualification" that skips the credit check. Two properties of it matter.

First, it binds nobody. The bank can revise or withdraw it if your circumstances change, and the rate quoted on it is indicative. The binding document is the Letter of Offer, which comes later and only after a valuation (The Loan Connection, DollarBack).

Second, its validity is short and the sources disagree — 30 days is the figure most commonly quoted, with some brokers citing 30 to 90 days depending on the bank. Plan on 30. It is also property-specific: change the unit and you generally need a fresh assessment.

None of that has changed in 2026. The IPA is still computed at TDSR 55%, stress-tested at the 4.0% medium-term rate floor rather than the 1.3-odd per cent you would actually pay, and capped at 75% LTV on a first housing loan (MAS). Three-month compounded SORA sat around 1.12% in July 2026, with the cheapest two-year fixed packages from about 1.40% — but the IPA arithmetic ignores both and uses 4% (PropertyNet).

For contrast, HDB's equivalent runs on a completely different tempo: the HFE letter is valid for nine months — extended from six with effect from 7 November 2023 — and takes up to 21 working days to process (HDB, CPF). A private buyer who assumes their bank approval behaves like an HFE letter has already made their first scheduling error.

New launch: the five clocks, and what starts each one

For a licensed developer's project, none of this is custom. The Option to Purchase and the Sale & Purchase Agreement are prescribed forms under the Housing Developers Rules, and the deadlines below are contractual terms in those forms, not market convention (Housing Developers Rules, Schedule 1; URA Home Buyers' Guide).

Clock	Starts from	Length	On a S$1.68m unit
Booking fee	—	Paid on booking day	S$84,000 at 5%
Developer delivers S&P + title deeds	Date of the Option	Within 14 days	—
Option expiry (window to exercise)	Delivery of the S&P, not the Option date	3 weeks	Sign and return all execution copies
Balance of the 20% downpayment	Date of the Option	On exercise, or within 8 weeks	S$252,000
Buyer's Stamp Duty	Date you sign in Singapore	14 days	S$53,600

Two precision points in that table are where most write-ups go wrong.

The three-week exercise window runs from delivery of the S&P, not from booking. Clause 3.1 of the prescribed Option ties expiry to the date the S&P and title deeds are delivered. Combined with the developer's 14-day delivery duty, the practical outside limit is roughly five weeks from booking — but you cannot plan on five weeks, because the developer may deliver on day two.

The eight-week clock is the one that binds funding, and it starts at the Option date. The prescribed form gives the developer the choice: the balance of the 20% is payable either on exercise or within eight weeks of the Option. That eight weeks is measured from booking day — weeks before you were handed a contract to read. Your Letter of Offer, your valuation, your CPF withdrawal and your lawyer all have to land inside a window that began while you were still at the showflat.

The cash schedule, in order

On S$1,680,000, at 75% LTV:

When	What	Amount
Booking day	Booking fee, 5%, cash	S$84,000
On exercise, or by week 8	Balance to 20% (cash and/or CPF OA)	S$252,000
Within 14 days of signing	Buyer's Stamp Duty	S$53,600
	Total inside ~8 weeks	S$389,600

The 5% minimum-cash rule is MAS's, not the developer's: at 75% LTV, at least 5% of price must be cash, with the next 20% payable in cash and/or CPF Ordinary Account. On this purchase the booking fee alone satisfies the cash minimum — which is precisely why buyers underestimate what follows. The S$252,000 is the part CPF can carry, and CPF withdrawal is a process with its own lead time that cannot begin until the loan offer is signed.

Stamp duty is unforgiving on timing: 14 days from signing in Singapore (30 if signed overseas), with penalties of up to four times the duty (IRAS). It is not negotiable and it is not deferrable behind a slow loan.

One further constraint specific to new launches: fixed-rate packages are generally not offered on building-under-construction loans, because disbursement is progressive. BUC borrowers price on floating and refinance to fixed after TOP if they want to (PropertyNet).

What walking away costs

If the option is not exercised, the developer forfeits 25% of the booking fee and must refund the remaining 75% within four weeks (Option clause 5.1(a)). On a 5% booking fee, 25% of it is 1.25% of the purchase price — S$21,000 on this unit. On a 10% booking fee it is 2.5%. The commonly quoted "1.25%" assumes a 5% booking fee; the prescribed form leaves the percentage blank and URA's guide describes booking fees of between 5% and 10%.

That is the cheap exit. The expensive one is defaulting after exercising: the prescribed S&P lets the developer treat the agreement as repudiated on not less than 21 days' written notice, and on annulment forfeit 20% of the purchase price plus interest and costs. The gap between those two outcomes — 1.25% versus 20% — is the entire reason the exercise decision deserves more than the three weeks it usually gets.

Resale runs a tighter set of clocks

A resale purchase has fewer moving parts and less slack:

Option fee 1% of price, paid on grant of the Option to Purchase — S$16,800 here. Negotiable; a larger fee sometimes buys a longer option period.
Option period 14 days, typical rather than statutory. HDB resale is fixed at 21 calendar days, expiring at 4pm on the last day, with the option fee capped between S$1 and S$1,000.
4% on exercise, forming the standard 5% deposit. Some deals run 1% + 9%.
Completion 8 to 12 weeks from exercise — convention, not law.
Stamp duty within 14 days of exercising, same as everywhere else.

Fourteen days is a shorter runway than a new launch's three weeks, and it is the whole window for valuation, Letter of Offer and CPF confirmation. This is where an IPA that is already on file earns its keep: it is not a discount and it is not a guarantee, but it is the difference between a bank starting work on day one and starting work on day four.

The three places buyers actually get caught

Assuming the exercise window starts at booking. It starts at delivery of the S&P. If the developer delivers on day two, your three weeks ends on day 23 — not on day 35.

Reading the eight-week clock as eight weeks of preparation time. It runs from the Option date, in parallel with everything else, and CPF cannot move until the loan offer is signed. Work backwards from week eight, not forwards from the contract.

Treating the IPA as the approval. It is a snapshot with a roughly 30-day shelf life, issued on a 4% stress rate, non-binding on the bank, and invalidated by a new car loan or a job change between booking and offer. If anything about your income or debt is about to change, it changes before the IPA, not after.

None of these deadlines are hidden. They are printed in a prescribed form that every buyer of a new launch signs, and they are the same for every project. They only feel like ambushes because the clocks are almost never laid side by side, which is the only way the overlap becomes visible.

Methodology published. No spin.

Sources: New-launch timings are terms of the prescribed Option to Purchase and Sale & Purchase Agreement in Schedule 1 of the Housing Developers Rules, as summarised in the URA Home Buyers' Guide. Stamp duty deadlines and penalties from IRAS. TDSR 55%, the 4% medium-term rate floor and 75% LTV from MAS. HFE letter validity from HDB and CPF. IPA characteristics and validity, and resale option conventions, from broker and portal guides (The Loan Connection, DollarBack, PropertyGuru) — these are market practice and vary by bank and by deal, not statute. Rate levels as at July 2026 from PropertyNet. All S$ figures computed by TRIBE for the stated S$1,680,000 purchase at a 5% booking fee and 75% LTV.

Silas Tan is a District Director at Huttons Asia and co-founder of TRIBE. This article is general information, not financial, tax or legal advice; the terms of your own Option to Purchase and loan offer govern. CEA Registration R000303I.