Simulated case study: a hypothetical scenario to illustrate the rules. Not a real client or transaction. Figures as at 10 October 2026.
Under the assumptions below, a couple earning S$13,500 a month would pay about S$160,000 more for a resale 4-room flat than for a Prime BTO flat, after grants. The resale flat has a shorter wait and a 5-year MOP, while the Prime flat has a 10-year MOP, no whole-flat rental and a subsidy clawback. Which option is better depends mostly on where the couple would live during the BTO wait and how soon they might want to sell.
Figures as at 10 October 2026. Check the official source before acting.
The situation
Wei (28) and Ling (27) are fictional first-time buyers, both Singapore Citizens, with a combined gross income of S$13,500 a month and no other debts. They are choosing between:
- Option A: a 4-room flat in a Prime BTO project, at an assumed price of S$560,000, with an assumed four-year wait for completion.
- Option B: a 4-room resale flat in a mature town, at an assumed price of S$820,000, bought at valuation and occupied straight away.
Their parents live within 4km of the resale flat.
The rules that apply
| Rule | What applies | Source and date |
|---|---|---|
| Family income ceiling (new flat, resale with grant, HDB loan) | S$16,000 a month | MND/HDB, HFE applications from 24 Aug 2026 |
| CPF Housing Grant (Family), resale 4-room | S$80,000 | HDB, since 14 Feb 2023 |
| Enhanced CPF Housing Grant | Up to S$120,000, for household incomes up to S$9,000 only | HDB, since 20 Aug 2024 |
| Proximity Housing Grant (resale only) | S$30,000 living with parents; S$20,000 living within 4km | HDB |
| HDB loan limit | Up to 75% of price or value | HDB, since 20 Aug 2024 |
| HDB loan rate | 2.6% a year (CPF OA rate plus 0.1 percentage point) | HDB, Oct to Dec 2026 |
| Mortgage Servicing Ratio | 30% of gross income | MAS |
| Minimum Occupation Period | Standard: 5 years; Plus and Prime: 10 years | HDB |
| Prime flats after MOP | No whole-flat rental; subsidy clawback on resale (percentage set per project) | HDB |
| Buyer's Stamp Duty | 1% on first S$180,000, 2% on next S$180,000, 3% on next S$640,000 | IRAS) |
The numbers
| Assumption | Option A: Prime BTO | Option B: resale 4-room |
|---|---|---|
| Price | S$560,000 | S$820,000 |
| Grants | S$0 (income above the EHG ceiling) | S$80,000 CPF Housing Grant + S$20,000 PHG = S$100,000 |
| HDB loan (75%) | S$420,000 | S$615,000 |
| Loan rate and tenure | 2.6%, 25 years | 2.6%, 25 years |
| Wait before moving in | 4 years (assumed) | None |
| Where they live while waiting | With parents (rent S$0); sensitivity at S$3,200 a month | Not applicable |
Step 1: Price after grants. Option B: S$820,000 - S$100,000 = S$720,000. Option A: S$560,000. Difference: S$160,000.
Step 2: MSR check. 30% x S$13,500 = S$4,050 a month. HDB sizes the loan at 3%: S$615,000 over 25 years at 3% is about S$2,916 a month, within the limit. Both loans pass.
Step 3: Monthly instalment at 2.6%. Option B: about S$2,790. Option A: about S$1,905, starting only after key collection.
Step 4: Buyer's Stamp Duty. Option B on S$820,000: S$1,800 + S$3,600 + 3% x S$460,000 (S$13,800) = S$19,200. Option A on S$560,000: S$1,800 + S$3,600 + 3% x S$200,000 (S$6,000) = S$11,400.
Step 5: Interest over the first five years.
- Option B: five years of instalments on S$615,000. Interest is about S$74,100, and about S$93,300 of principal is repaid.
- Option A: keys in year 4, so one year of instalments on S$420,000. Interest is about S$10,800.
Step 6: Five-year unrecoverable costs.
| Five-year cost | Option A: Prime BTO | Option B: resale |
|---|---|---|
| Interest | S$10,777 | S$74,119 |
| Buyer's Stamp Duty | S$11,400 | S$19,200 |
| Rent while waiting (living with parents) | S$0 | S$0 |
| Total | S$22,177 | S$93,319 |
| Total if renting at S$3,200 a month for 4 years | S$175,777 | S$93,319 |
Under these assumptions, the Prime BTO costs about S$71,100 less over five years if Wei and Ling live with their parents during the wait. If they would otherwise rent, the resale flat costs about S$82,500 less.
Step 7: When can they sell? The resale flat reaches its MOP after 5 years. The Prime flat reaches its MOP about 14 years from booking (a 4-year wait plus a 10-year MOP). If the Prime flat were later sold for an assumed S$1,000,000 and the project's clawback were an assumed 9%, HDB would recover S$90,000 from the proceeds.
What changes the answer
| Change | Effect |
|---|---|
| Rent during the BTO wait | Each year of renting at S$3,200 a month adds S$38,400 to Option A |
| Plans to upgrade or move within 14 years | Only Option B can be sold or rented out whole within that time |
| Household income above S$16,000 later | Does not affect a loan already taken, but limits who can buy a Prime flat from you on resale |
| A different clawback rate or resale price | Changes Option A's net proceeds on sale, roughly in proportion |
What to check for your own situation
- Your exact grant amounts, including the Proximity Housing Grant, through an HDB Flat Eligibility (HFE) letter.
- The clawback percentage, MOP and expected completion date in the HDB sales brochure for the specific Prime project.
- Your HDB loan amount, which HDB sets at the higher of 3% or the CPF OA rate plus 0.1 percentage point.
- Whether you can live with family during the wait, and what renting would cost you.
- How likely you are to need to sell or rent out the whole flat within the next 14 years.
Related guides
- HDB Standard, Plus and Prime flats explained
- November 2026 BTO: Standard, Plus and Prime rules
- HDB resale prices Q3 2026
- How much can I borrow? calculator
Sources
- Housing & Development Board: Standard, Plus and Prime flats, Housing grants, HDB loan interest rate
- Monetary Authority of Singapore: MSR and TDSR rules
- Inland Revenue Authority of Singapore: Buyer's Stamp Duty)
- Ministry of National Development: Press releases (National Day Rally 2026 housing measures)
Frequently asked questions
What is the main difference between a Prime BTO flat and a resale flat?
A Prime flat has a 10-year Minimum Occupation Period, cannot be rented out as a whole flat even after the MOP, and carries a subsidy clawback on resale set for each project. A Standard resale flat has a 5-year MOP from when you take possession, no clawback, and can be rented out whole after the MOP with HDB approval.
What grants can a couple earning S$13,500 get for a resale 4-room flat in 2026?
First-timer families earning up to S$16,000 a month can get the CPF Housing Grant of S$80,000 for a resale 4-room flat. The Enhanced CPF Housing Grant only goes to households earning up to S$9,000, so it is S$0 at S$13,500; a Proximity Housing Grant of S$20,000 or S$30,000 may apply if they live near or with parents.
How much can a couple earning S$13,500 borrow from HDB?
HDB lends up to 75% of the price or value, subject to a 30% Mortgage Servicing Ratio; HDB sizes the loan at the higher of 3% or the CPF OA rate plus 0.1%. At S$13,500 the MSR limit is S$4,050 a month, and the actual concessionary rate is 2.6% a year.
In this simulation, which option costs less over five years?
Under these assumptions, the resale flat has about S$93,300 of interest and stamp duty over five years and the Prime BTO about S$22,200 if the couple lives with parents while waiting. If they rent at S$3,200 a month during a four-year wait, the BTO's five-year cost rises to about S$175,800.