Lease decay is usually discussed as something that happens to other people, later. The flats whose leases actually run out do so in the 2060s, which is comfortably beyond the horizon of any decision being made this weekend. So the topic gets filed with rising sea levels: real, distant, somebody's problem eventually.
That filing is wrong. The problem is not the lease running out; it is a financing rule in force today. Almost nobody quotes it correctly, and for a thirty-year-old buyer it starts biting on flats built in 1992. A 1992 flat is thirty-four years old. Nobody calls that old.
What a 99-year lease actually confers
An HDB flat is not sold freehold and never has been. What is bought is a lease giving the right to occupy and to sell that right on. The 99-year term is fixed from when the block was completed, not from when you buy. A resale flat transfers whatever is left of the original term, which is why two identical units in the same estate can be worth quite different amounts.
At the end of the term the flat returns to the state and the lease has no residual value. There is no automatic renewal and no compensation as of right. Redevelopment schemes exist and can change the outcome for particular blocks, but they are selective by design: the government chooses sites, on its own timing, and no individual owner can count on being chosen. Planning around being selected is planning around a lottery ticket.
None of that is controversial or hidden. It is also not the part that affects a purchase made this year.
The rule, in the government's own words
The rule that matters now governs how much of the purchase you may fund with CPF savings and how much you may borrow. It is set out in a Ministry of National Development annex, Updated Rules on CPF Usage and HDB Housing Loan, which states:
"Valuation Limit pro-rated according to the extent that the remaining lease can cover the youngest buyer using CPF to the age of 95."
Read that slowly, because the ordinary summary of it — "you cannot use CPF on old flats" — is wrong in both directions. There is no cliff at which CPF stops. There is a sliding scale, and it applies to a great many flats that nobody thinks of as old.
The test is not the flat's age, but whether the remaining lease covers the youngest buyer to age 95. Clear that and you get the full Valuation Limit and the full loan-to-value limit. Miss it and both are pro-rated by how far short you fell. The same annex applies the identical logic to the loan: the limit is "pro-rated based on the extent that the remaining lease can cover the youngest buyer to the age of 95".
The date arithmetic almost nobody does
Turn the rule around and it becomes a simple subtraction. A buyer aged thirty needs sixty-five years of lease. A buyer aged twenty-five needs seventy. Now ask which flats still clear that in 2026:
The younger the buyer, the newer the flat has to be. That is the opposite of the intuition most people carry, which is that a young buyer has time on their side. Under this rule youth is a liability: a twenty-five-year-old must find a flat from 1997 or later to be financed in full, while their parents at fifty could buy something from 1972 and clear the same test.
Be precise about which date counts. The annex specifies that for HDB flats the relevant moment is the flat application date, not the completion of the sale — and for private property and executive condominiums it is the date the Option to Purchase or the Sale and Purchase Agreement is exercised.
What pro-rating costs on one flat
Take a thirty-year-old buying a resale flat priced at $600,000, and vary only the year the block was completed. Nothing else changes — same price, same buyer, same income.
| Completed | Lease left | CPF share | Loan-to-value | Maximum loan |
|---|---|---|---|---|
| 1992 | 65 years | 100% | 75.0% | $450,000 |
| 1985 | 58 years | 89.2% | 66.9% | $401,538 |
| 1980 | 53 years | 81.5% | 61.2% | $366,923 |
| 1975 | 48 years | 73.8% | 55.4% | $332,308 |
| 1970 | 43 years | 66.2% | 49.6% | $297,692 |
Between the top row and the bottom, the maximum loan falls by $152,308 on an identical price. That is cash the buyer has to find from somewhere, and it arrives at the same moment the CPF ceiling is tightening. The shortfall cannot simply be met by drawing more from the Ordinary Account, because both levers move together.
This is why the sliding scale matters more than the eventual expiry. A flat completed in 1970 has forty-three years left. Nobody buying it is worried about 2069. They are, or should be, worried about finding an extra $152,308 in 2026.
Three more clauses that catch people
The pro-rating is the headline, but the same annex carries three narrower rules that decide individual cases.
There is a hard floor at twenty years. Whatever the buyer's age, CPF may only be used where the remaining lease at the point of purchase is more than twenty years. Below that the sliding scale stops sliding and CPF is simply unavailable — the purchase becomes a cash-and-bank-loan exercise.
The loan tenure is the shortest of three figures, not simply the one you ask for. The candidates are twenty-five years, sixty-five minus the average age of the buyers, or the remaining lease minus twenty years. On a flat with forty-three years left, that third clause caps the tenure at twenty-three years regardless of anything else — which raises the monthly payment and therefore tightens the servicing ratios as well.
Nothing here is a haircut on value. Pro-rating limits how much CPF you may use and how much you may borrow. It does not reduce what the flat is worth, and it does not take money from you. The effect is on the shape of the purchase — more cash up front, less leverage, a shorter loan — not on the asset.
What this does not mean
This is not to say older flats are a mistake. They are frequently larger, better located and cheaper per square foot than anything new. For a buyer with the cash to meet a lower loan-to-value they can be an excellent purchase; the rule is a financing constraint, not a verdict on the property.
Nor does the flat become unsellable. The pool of buyers who can finance it narrows as the lease shortens, and narrows fastest for the youngest buyers. That is a resale-market effect to understand when you come to sell, not a reason to avoid buying.
And it does not mean the numbers above are your numbers. They assume a single buyer, one price, and the prevailing limits; a joint purchase turns on the youngest buyer, grants change the cash position substantially for first-timers, and the servicing ratios may bind before the loan-to-value does.
Work out your own line before you view anything — subtract your age from 95, and that is the remaining lease you need for full treatment. Ask for the lease commencement date, not the flat's age, because the 99 years run from completion of the block and a "1990s development" can span several years. On a joint purchase, run the number for the youngest buyer: that is whose age the rule uses, and it is often the one nobody thought to check. If the flat falls short, price the gap in cash rather than assuming CPF will cover it, because the CPF ceiling and the loan ceiling tighten together and neither can rescue the other. And check the tenure cap separately — remaining lease minus twenty can bind before anything else does, and it moves the monthly payment rather than the headline.
What this audit found in our own tools
Every guide in this series checks the tools it links, and this one found a gap rather than a miscalculation.
Our HDB affordability calculator did not implement this rule at all. It asked for income, existing debts, available cash, loan type, tenure and the number of housing loans you already carry — and for neither the flat's remaining lease nor the buyers' ages, which are the two inputs the pro-rating needs. It therefore reported the top row of the table above in every case. A thirty-year-old modelling a 1970 flat was told the maximum loan is $450,000 when the rule puts it at $297,692, and so was told they needed $152,308 less cash than they actually do. That is fixed as of 6 August 2026. The tool now asks for the remaining lease and the buyers' ages, then shows the reduced limit against the full one it came down from. A note explains how far the lease reaches and what that does to the Valuation Limit, rather than quietly returning a smaller number.
The more useful finding was about sourcing, and it cuts against the obvious rule of thumb. The Ministry annex quoted above is a primary government document, and its stated loan-to-value limit is 90%. That figure is stale: the limit for HDB housing loans was reduced to 80%, and then to 75% with effect from 20 August 2024. Our own engine already carried 75% and was right. Had the annex been trusted as current merely because it is primary, this guide would have published a figure fifteen percentage points wrong, in the direction that flatters the reader.
The lesson generalises past this topic. A primary source is authoritative about what it said on the day it was written, and nothing more. Singapore's property rules often change by surprise cooling measure, not on a published schedule. Age matters as much as provenance. When a primary source and a maintained implementation disagree, the discrepancy is the finding.
Run your own numbers
Start with the subtraction in your head — 95 minus your age — then check the rest against the tools. Our HDB affordability calculator takes the lease and the ages and applies the pro-rating described above alongside the income gates. The Singapore stamp duty calculator prices the duty on the way in, and the rent versus buy calculator is worth a look before you assume buying is the cheaper option at all. For the gates themselves — MSR, TDSR, the 4% assessment floor, and the same arithmetic run for Malaysia — see how much mortgage you can actually borrow in Singapore and Malaysia.
- The pro-rating rule, the twenty-year floor, the three-way tenure cap and the point-of-purchase definitions are quoted from the Ministry of National Development's "Annex A — Updated Rules on CPF Usage and HDB Housing Loan", read directly as a PDF on 5 August 2026. The wording quoted in the body is verbatim from that document.
- ⚠️ That annex dates from 2019 and its stated 90% loan-to-value limit is superseded. The current HDB housing loan limit of 75%, effective 20 August 2024 and reduced from 80%, is established from two independent lines that agree: HDB's published cooling-measure release, and our own Singapore property engine, whose figures were last verified on 11 June 2026.
- ⚠️ Stated rather than hidden: HDB's own pages describing lease reversion returned HTTP 404 to direct retrieval while this guide was written, and the Monetary Authority's loan-limits explainer was serving a maintenance page. The description of what a 99-year lease confers therefore rests on HDB's published position as reproduced in search results, not on a page read end to end, and no wording is quoted from HDB as though it were.
- No figure is given for how many blocks have been selected for redevelopment. Numbers circulate for this, but none could be traced to a primary source while writing, so the schemes are described structurally — selective, at the government's timing — rather than with a statistic that would look more precise than it is.
- Every figure in the tables was computed from the rule rather than typed: the qualifying-year table, the pro-rated shares, the loan-to-value figures and the $152,308 difference were all generated by script and cross-checked, including that the shares fall monotonically as the flat gets older and that 1992 lands exactly on the boundary for a thirty-year-old.
This is general education about how the financing rules work, not personalised financial advice. The figures depend on facts specific to you — your age, who you are buying with, your grants and your income — and the rules change by cooling measure without notice. Confirm your own position with HDB, the CPF Board or your bank before committing to anything.
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