Common Sale of Properties Mistakes in the RES Exam and How to Avoid Them

TL;DR: Many candidates fail Paper 2 by confusing the 14-day private property Option to Purchase (OTP) period with the 21-day HDB period, or by miscalculating the 1% and 4% payment split. This confusion arises because the Council for Estate Agencies (CEA) and the Law Society of Singapore provide different frameworks for private and public housing. In the RES exam, a typical trap involves a scenario where a buyer is given a 21-day option for a private condo; candidates often incorrectly assume this is standard, whereas the Law Society’s Conditions of Sale 2020 typically suggest 14 days unless otherwise negotiated.

Exam-setters often use distractors that swap the 'Option Fee' (usually 1%) with the 'Exercise Fee' (usually 4%). To avoid this, remember that the total deposit held by the lawyer or in a Singapore Academy of Law (SAL) escrow account is generally 5% of the purchase price. For RES exam candidates, this topic falls under Sale of Properties in Paper 2. You can practice questions on this in the Prepare app.

Feature	Private Property (Standard)	HDB Resale
OTP Validity Period	14 Days (Negotiable)	21 Days (Fixed)
Option Fee	Usually 1%	Not more than S$1,000
Option Exercise Fee	Usually 4%	Not more than S$4,000
Total Deposit	Usually 5%	Max S$5,000

The standard private property Option to Purchase (OTP) is valid for 14 days, requiring a 1% option fee, while the exercise fee is usually 4% of the purchase price, totaling a 5% deposit upon exercising the option to create a binding Sale and Purchase Agreement.

A frequent mistake is the belief that a buyer can request an HDB valuation at any time. Under current HDB Resale Procedures, the buyer can only request a valuation after the seller has granted the OTP. Candidates often pick the distractor stating that valuation must be done before the OTP is issued to determine the price. In reality, the 'Price' is agreed upon first, then the valuation follows to determine CPF usage and loan amounts.

Another common error involves the HDB Flat Eligibility (HFE) letter. As of 2026, buyers must have a valid HFE letter before the seller can even grant the OTP. Exam questions may present a scenario where a salesperson facilitates an OTP grant without an HFE letter; the correct answer is that this is a procedural violation. According to the CEA Annual Report, maintaining procedural integrity in HDB transactions remains a key focus for industry regulation.

In HDB resale transactions, the Option to Purchase (OTP) is valid for 21 days, and the buyer must have a valid HDB Flat Eligibility (HFE) letter before the seller can grant the OTP to ensure the transaction is legally compliant with current housing policies.

The Estate Agents Act (Cap. 95A) is very strict about commission, yet candidates often stumble on 'dual representation' questions. The mistake is thinking an agent can collect a 'half commission' from both sides if both parties agree in writing. This is strictly prohibited. An agent can only represent one party in a single transaction.

Another distractor involves 'Net Listings,' where a seller says, 'I want $1M, anything above that you can keep as commission.' This is illegal in Singapore. Candidates must identify that commission must be a fixed amount or a percentage of the transacted price. With over 33,000 registered property agents in Singapore as of 2026, the CEA strictly enforces these ethical boundaries to prevent conflicts of interest.

Under the Estate Agents Act (Cap. 95A), property agents are strictly prohibited from dual representation in the same transaction and cannot collect commission from both the buyer and the seller, ensuring transparency and preventing conflicts of interest in Singapore real estate.

Many candidates ask: What is the passing score for the RES exam? To become a licensed agent, you must achieve a 75% passing threshold (60 out of 80 marks) for both Paper 1 and Paper 2. Another common query is: How much does the RES exam cost in 2026? The registration fee is S$408.55 (inclusive of GST).

Candidates also frequently ask about the timeline for Stamp Duty. A common mistake is thinking Buyer's Stamp Duty (BSD) is paid at the end of the transaction (Completion). In fact, it must be paid within 14 days of the date of the exercised OTP or Sale and Purchase Agreement. Failing to know this timeline often leads to incorrect answers in Paper 2 calculation or process questions. For more details on exam strategy, check our article on Practice Question Patterns.

The RES exam has a 75% passing threshold per paper, and candidates must pass both Paper 1 and Paper 2 within two years of completing their RES course to qualify for registration with the Council for Estate Agencies (CEA).

Candidates often confuse the 'Date of Contract' with the 'Date of Completion' when calculating deadlines for Buyer's Stamp Duty (BSD) and Additional Buyer's Stamp Duty (ABSD). The law requires payment within 14 days of the document being executed (signed) if signed in Singapore.

In exam scenarios, you might be asked when a buyer must pay ABSD for a second property. The distractor will often suggest '10 weeks from OTP' (the typical completion period). Choosing this is a guaranteed way to lose marks. Always anchor your timeline to the date the Option was exercised. For RES exam candidates, this topic falls under Taxation and Sale of Properties in Paper 2. You can practice questions on this in the Prepare app.

Buyers must pay Buyer’s Stamp Duty (BSD) and Additional Buyer’s Stamp Duty (ABSD) within 14 days of signing the Sale and Purchase Agreement or exercising the Option to Purchase if the document is signed in Singapore, regardless of the completion date.

A common mistake in Paper 2 is failing to distinguish between patent and latent defects in the sale process. Candidates often assume the 'as-is-where-is' clause protects a seller from all liability. However, while a buyer is responsible for patent defects (visible issues like a cracked window), the seller may still be liable for the fraudulent concealment of latent defects (hidden structural issues).

Exam questions often use a scenario where a seller hides termite damage behind a new coat of paint. If the candidate selects the answer that the 'as-is-where-is' clause protects the seller, they are incorrect. The correct understanding involves the principle of caveat emptor (buyer beware), but with the caveat that active concealment of material facts can void the protection of standard 'as-is' clauses.

The 'as-is-where-is' clause protects sellers against patent defects visible during inspection but does not necessarily absolve them from failing to disclose latent structural defects that were deliberately concealed from the buyer during the property sale process. The Prepare app offers practice questions across all 13 RES exam topics to help you master these nuances.