First Time Buyer Series · Part 5 of 8

From offer to OTP: what first time buyers must know

By Winfred Quek · CEA R073319H · Published 30 August 2026

Quick answer: An offer becomes real the moment money changes hands for an Option to Purchase. For a private resale, that is typically a 1% option fee, with a further 4% due if you exercise, 5% total, and the option usually runs 14 days. For an HDB resale, the option fee is commonly a negotiated amount up to $1,000, with the option fee and exercise money together capped at $5,000 in total, and the option runs 21 days. Once you exercise, you are contractually bound, and backing out means forfeiting what you have paid.

Rates and thresholds change. The current figures are kept in one place: the Singapore property rules reference.

Facts verified: 30 August 2026 · Sources linked below

Key Takeaways

An Option to Purchase (OTP) is granted by the seller in exchange for money. How much and for how long differs between a private resale and an HDB resale.
Private resale convention: about a 1% option fee upfront, a further 4% on exercise, 5% total, with roughly 14 days to decide.
HDB resale convention: a negotiated option fee commonly up to $1,000, with the option fee and exercise money together capped at $5,000 in total, and 21 days to decide.
Exercising the OTP is the moment the deal becomes a binding contract, not the moment you first agree on price.
After exercising, backing out normally means forfeiting your deposit, and possibly facing a claim for the seller's further losses.

Somewhere between agreeing on a price and collecting keys, there is a single moment that matters more than any other: exercising the Option to Purchase. Everything before it is negotiable. Everything after it is a binding contract. Understanding exactly where that line sits protects you from the two most common first timer mistakes, treating an early conversation as a done deal, and treating exercise day as just another form to sign.

How offers and counters actually happen

A verbal offer, made through your agent to the seller or the seller's own agent, is where negotiation starts. Counters go back and forth until both sides land on a price. None of this is binding. A verbal agreement, even a very confident sounding one, means nothing in law until money and paperwork actually change hands. Do not treat a verbal yes as the finish line, and do not let a seller's agent pressure you into believing it is.

When a separate agent represents the seller

Many resale transactions involve two agents, one representing you and one representing the seller, negotiating with each other on their clients' behalf. This is normal and generally works in your favour, since your agent is not also trying to extract the best price for the seller. What matters is clarity: know which agent is actually acting for you, put any agreed price and conditions in writing through them, and treat anything said informally between agents as provisional until it shows up on the OTP itself.

The Option to Purchase: what it actually is

An OTP is a legal document giving you, the buyer, the exclusive right to purchase at the agreed price within a set window, in exchange for the option fee. While that window runs, the seller cannot sell to anyone else. You are not yet obligated to buy, for a private purchase, choosing not to proceed simply means forfeiting the option fee you paid. See the full OTP guide for the complete mechanics.

Option fee and exercise money: private vs HDB resale

Aspect	Private resale	HDB resale
Option fee	Typically around 1% of price	Negotiated, commonly up to $1,000
Option period	Typically 14 days	21 days
Exercise payment	A further amount, typically around 4%, for 5% total	Balance so the option fee and exercise together do not exceed $5,000
Payment method	Cash for the option fee; cash or CPF on exercise	Cash for the option fee; cash or CPF on exercise
Result of exercising	Binding contract, Sale and Purchase Agreement follows	Binding contract, resale process moves ahead through HDB

What exercising actually commits you to

Exercising the option converts it from a right into a binding agreement. This is also the point the clock starts on Buyer's Stamp Duty, due within 14 days of exercising or signing, whichever is earlier, paid in cash or CPF, never financed as part of the loan. See the full stamp duty guide for exact figures. For a detailed week by week walk through of everything that happens once you exercise, see what happens after exercising the OTP. Financing itself, from formal loan approval through to completion, is covered in full in part 6 of this series.

A worked example of the money, at each stage

Take a private resale unit agreed at $1,000,000, as an illustration only. The option fee, paid to secure the OTP, is around 1%, or $10,000. If you exercise within the option period, a further 4%, or $40,000, is paid, bringing the total deposit to $50,000, or 5%. Both the option fee and the exercise money are not extra costs on top of the price, they are credited toward the $1,000,000 purchase price at completion, when the balance is settled through your loan, CPF, and remaining cash. Buyer's Stamp Duty, roughly $24,600 on a purchase at this price, is a separate cash or CPF cost due within 14 days of exercising, on top of this deposit.

Stage	Payment	Amount on $1,000,000
Option fee paid	Secures the OTP	$10,000 (about 1%)
Exercise money paid	Converts the OTP into a binding contract	$40,000 (about 4%, 5% total)
Stamp duty, within 14 days	Separate cash or CPF cost, not part of the deposit	Approximately $24,600
Balance at completion	Loan, CPF, and remaining cash	$950,000

Illustrative only, based on a $1,000,000 private resale. Your own figures depend on your price, financing, and profile.

When does your money become non refundable, and what if you walk away?

If you decide not to exercise a private OTP before the option period lapses, you forfeit the option fee, typically around 1% of price, but are not otherwise bound. That is the entire point of paying for an option, it buys you the right to walk away at that stage for a known, capped cost.

If you exercise and then try to back out, you are generally in breach of a binding contract. You would typically forfeit the exercised deposit, around 5% for a private resale, and could face a claim for the seller's further losses on top of that. For an HDB resale, exercising similarly creates binding obligations under the resale process, with its own consequences for backing out. See what happens if you forfeit your OTP deposit for the full range of scenarios.

Treat exercising as your real yes. The exercise decision is not reversible in any practical sense. Do not treat it as a formality that follows naturally from having already paid the option fee. Confirm your financing is genuinely in order, per part 2 of this series, before you exercise, not after.

Winfred's Take

First timers sometimes treat paying the option fee as casual, a small deposit to lock things in while they keep thinking, then feel real panic in the days before the exercise deadline. The honest truth is that most buyers have already emotionally committed the moment they sign the cheque for the option fee. Do your financing checks and your viewing due diligence before that moment, not in the two week window it buys you. By exercise day, this should feel like a formality, because the real decision already happened.

Part 6 of this series picks up immediately after exercise, covering the formal loan process, lock in periods, CPF timing, and the insurance choices that come with financing your first home.

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Do not exercise an OTP without this checked first

Winfred reviews your financing position and the OTP terms before you commit money, so the moment you exercise is a confirmation, not a gamble.

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Winfred Quek · CEA R073319H · Crestbrick Pte Ltd

Frequently asked questions

What is the difference between the option fee and the exercise fee?

The option fee is paid upfront to secure the Option to Purchase, giving you the exclusive right to buy at the agreed price for a set period. The exercise fee, or exercise amount, is the further payment made if you decide to proceed, converting the option into a binding contract. For a private resale these are typically 1% and a further 4%, for 5% total.

How long do I have to decide after paying the option fee?

For a private resale, the option period is typically 14 days. For an HDB resale, it is 21 days. Both are counted from the date the option is granted, and the deadline is stated on the option document itself.

Can I negotiate the option fee amount for an HDB resale flat?

Yes. Unlike the private resale convention of roughly 1%, the HDB resale option fee is negotiated directly between buyer and seller, commonly up to $1,000, with the option fee and the later exercise money together capped at $5,000 in total.

What happens if I don't exercise the OTP in time?

If the option period lapses without you exercising, the option simply expires. For a private resale, you forfeit the option fee you paid, but you are not otherwise bound to proceed, and the seller is free to sell to someone else.

Is exercising the OTP the same as signing the Sale and Purchase Agreement?

Not quite the same document, but functionally the same commitment. Exercising the OTP creates the binding contract, and for a private purchase this is formalised through the Sale and Purchase Agreement that follows. Once exercised, you are contractually committed either way.

Earlier in this series

Sources & References

Winfred Quek is an Associate Marketing Consultant at Crestbrick Pte Ltd (CEA Licence No. L31010886H), CEA Registration No. R073319H. The information on this page is general in nature and does not constitute financial, legal, or investment advice, and is current as at 30 August 2026. Always verify the applicable rules with the relevant authority (HDB, CPF Board, IRAS, MAS, or URA) and consult qualified professionals before making any property decision.

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How does this apply to your own numbers?

General rules only take you so far. What actually decides your move is your financing, your timeline, and what you already own. A Property Portfolio Analysis maps your real position, so you are deciding on your own figures rather than a rule of thumb.

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