HDB Lease Decay Calculator Singapore 2026
Calculate your HDB flat’s remaining lease, pro-rated value, annual lease decay, and CPF/loan eligibility — free tool with real-time results in SGD.
HDB Lease Remaining Details
Not financial advice. For reference only. Data as at Q2 2026.
Understanding HDB Lease Decay for Singapore Buyers
HDB flats in Singapore are sold on a leasehold basis — most carry a 99-year lease from the date HDB first granted the land. Unlike freehold private property, your HDB flat’s land reverts to the state when the lease expires. This means a flat’s value is directly tied to how much lease remains. According to HDB’s pro-ration formula (used since the 1970s), a flat’s fair market value declines as its remaining lease shrinks relative to its original term. For buyers, this isn’t abstract: CPF Board’s Valuation Limit (VL) rules cap how much CPF Ordinary Account (OA) money you can use based on the flat’s remaining lease against your age. MAS-regulated mortgage lenders apply similar logic — bank loans require at least 60 years remaining lease, and HDB loans require at least 20 years. Understanding lease decay is essential before committing hundreds of thousands of dollars to a resale flat purchase. This calculator uses HDB’s standard pro-ration method to give you an instant, data-driven estimate. Not financial advice. All figures are for educational reference only. Data as at Q2 2026.
HDB’s Pro-Ration Valuation Formula
HDB computes a flat’s Adjusted Value by multiplying its market value by the ratio of remaining lease to original lease. For example, a flat with a market valuation of S$500,000 and 60 years remaining on a 99-year lease has an adjusted value of S$500,000 × (60 ÷ 99) = S$303,030. This adjusted value is used to determine how much CPF you can use and what HDB will peg the loan quantum to. The formula is linear — each year of remaining lease represents the same fraction of value. In practice, market sentiment can differ (buyers pay premiums for well-located older flats), but the CPF and loan eligibility rules follow the formula strictly. The formula does not account for enbloc potential, location premiums, or Selective En Bloc Redevelopment Scheme (SERS) designations.
CPF Withdrawal Limits and the 95-Year Rule
CPF Board applies the “cover to 95” rule: you can only use CPF OA savings to buy an HDB flat if the remaining lease covers the youngest buyer to at least age 95. If the lease coverage falls short of 30 years beyond the buyer’s current age (i.e., covers them past 65 but not 95), CPF usage is capped at the pro-rated portion of the Valuation Limit. If it doesn’t cover the buyer past 65, CPF use is completely restricted to the discounted purchase price. For a 35-year-old buyer, the flat must have at least 60 years remaining (35 + 60 = 95). This rule significantly impacts affordability — many older resale HDB flats in prime estates such as Toa Payoh, Queenstown, and Bukit Merah are approaching sub-60-year remaining lease thresholds.
How to Use This HDB Lease Decay Calculator
- Select Original Lease: Choose 99 years (the most common HDB lease), 60 years, or 30 years. Most standard HDB flats are 99-year leasehold from the year they were built.
- Enter Lease Start Year: Type the year the flat’s lease commenced. This is found on your HDB flat’s title deed or the property listing. For example, a Toa Payoh flat built in 1975 would have a lease start year of 1975, leaving 48 years as of 2026.
- Enter Market Valuation: Input the flat’s current market valuation (not transaction price) in SGD. Use the HDB Resale Price portal or a valuation from a licensed appraiser for accuracy.
- Set Your Age: Use the slider to set the youngest buyer’s current age. This determines CPF eligibility under the “cover to 95” rule — the calculator checks if the remaining lease plus your age reaches 95.
The calculator instantly shows remaining lease years, pro-rated value, projected value in 10 years, annual lease decay, and your financing eligibility for HDB loans, bank loans, and CPF usage.
Pro tip: Combine this calculator with our Home Loan Affordability Calculator to see how lease decay affects your total borrowing capacity and monthly repayment.
What Is HDB Lease Decay?
HDB lease decay refers to the systematic reduction in an HDB flat’s remaining leasehold tenure — and by extension, its pro-rated value — as years pass. Because HDB flats are not freehold, buyers are effectively purchasing the right to live in the flat for the remaining lease period, after which ownership returns to the Housing & Development Board. The concept of “decay” underscores that this asset has a finite, diminishing life.
The 99-year lease structure was introduced when HDB began its mass public housing programme in the 1960s. The first generation of HDB flats built in Queenstown, Toa Payoh, and Ang Mo Kio are now in their 50th–60th year. A flat built in 1970 retains only 43 years of lease as of 2026 — meaning it has already consumed 56% of its lifespan. For Singapore’s ageing population, this creates a generational property wealth question: many elderly Singaporeans’ sole significant asset is an HDB flat with fewer than 50 years left on the lease.
The Monetary Authority of Singapore (MAS) and HDB have introduced rules to protect buyers from unknowingly purchasing a rapidly depreciating asset. Understanding lease decay helps you make informed decisions about whether a resale flat is still a sound investment given its remaining tenure, financing limitations, and eventual return to the state.
How Lease Decay Affects Your Flat’s Value: The Maths
HDB uses a linear pro-ration model. If a 99-year leasehold flat has a current market value of S$600,000 and 70 years remain, its adjusted value is: S$600,000 × (70 ÷ 99) = S$424,242. This adjusted (pro-rated) value is the figure HDB uses for the Valuation Limit — the ceiling for CPF withdrawal and HDB loan quantum determination.
Lease decay accelerates in impact as the remaining lease shortens. Consider a flat trading at S$500,000 with 99 years remaining. Each year of lease decay costs approximately S$5,050 (S$500,000 ÷ 99). But if the same flat has only 40 years left and still trades at S$300,000, the annual decay in absolute terms is S$7,500/year (S$300,000 ÷ 40). In percentage terms, each year represents 2.5% of remaining value rather than 1% — the decay rate per year remaining is constant, but the absolute impact per year grows as the denominator shrinks.
Here is a reference table for a flat originally valued at S$500,000 on a 99-year lease, showing how pro-rated value changes:
| Years Remaining | % of Original Lease | Pro-Rated Value (S$) | CPF Eligible (Age 35)? |
|---|---|---|---|
| 80 years | 80.8% | S$404,040 | ✅ Yes |
| 70 years | 70.7% | S$353,535 | ✅ Yes |
| 60 years | 60.6% | S$303,030 | ✅ Yes (just) |
| 50 years | 50.5% | S$252,525 | ⚠️ Capped |
| 40 years | 40.4% | S$202,020 | ❌ Restricted |
| 30 years | 30.3% | S$151,515 | ❌ Restricted |
Resale HDB vs New BTO: Lease Implications
A new Build-To-Order (BTO) flat starts with a fresh 99-year lease, giving buyers maximum CPF flexibility and full financing access. The trade-off is a longer wait (typically 3–5 years) and balloting risk. Resale flats are available immediately at market price, but buyers must factor in the remaining lease and its downstream effects on affordability and eventual resale value.
For a 30-year-old buyer purchasing a resale flat with 65 years remaining, the math works comfortably: 65 remaining + 30 (age) = 95, exactly meeting CPF’s cover-to-95 threshold. But for a 40-year-old buying the same flat, the lease only covers them to age 105 — still fine. The critical threshold is when remaining lease + buyer age < 95, triggering CPF restrictions.
Beyond CPF, bank loans in Singapore (governed by MAS Notice 645) generally require the loan tenure to not exceed the remaining lease minus 30 years. So a flat with 60 years remaining can support a 30-year bank loan. A flat with 40 years remaining may only support a 10-year loan — dramatically increasing monthly repayments. Resale buyers should check both CPF eligibility and maximum loan tenure before making an offer. Our HDB Loan vs Bank Loan Calculator can help you compare both options.
Best Strategies to Mitigate Lease Decay Risk
Singaporeans have several strategies to manage lease decay risk in their property journey. First, prioritise BTOs in sought-after estates if you’re a first-time buyer under 35. A fresh 99-year lease maximises your flat’s long-term value and gives you full CPF and bank loan flexibility. Check HDB’s BTO launch calendar and use the Buy vs Rent Calculator to evaluate whether buying makes financial sense for your situation.
Second, research SERS designation potential. The Selective En Bloc Redevelopment Scheme compensates owners of older flats at market value and offers them replacement units at subsidised prices. While SERS selection is entirely at HDB’s discretion and not guaranteed, it has historically been applied to strategic estates like Queenstown, Toa Payoh, and Ang Mo Kio. Buying in areas with strong redevelopment precedent is a hedge against full lease decay.
Third, if you’re investing through private instruments rather than direct property, platforms like Endowus and Syfe offer REITs and diversified funds that provide real estate exposure without leasehold risk. S-REITs holding commercial and industrial properties diversify your Singapore real estate holdings beyond a single leasehold flat — a consideration especially relevant for retirement planning.
CPF and Bank Loan Rules for Older HDB Flats in 2026
As at Q2 2026, CPF Board enforces the following withdrawal limits for HDB flat purchases based on remaining lease:
- Remaining lease covers youngest buyer to age 95 or beyond: Full CPF Ordinary Account usage up to the Valuation Limit is permitted.
- Remaining lease covers buyer to between 65 and 95: CPF usage is pro-rated. The maximum CPF withdrawal is capped at the pro-rated portion of the Valuation Limit corresponding to the lease coverage beyond age 65.
- Remaining lease covers buyer to below 65: No CPF OA usage is allowed for the purchase.
For bank loans, MAS Notice 645 limits the Loan-To-Value (LTV) ratio and tenure. Typically, banks will not lend for a tenure exceeding the flat’s remaining lease minus 30 years, and many lenders apply a maximum age of 65 to the youngest borrower. HDB loans (capped at 2.6% p.a. as at Q2 2026) are more lenient, requiring only 20 years of remaining lease, but are subject to income ceilings and a maximum HDB Loan Eligibility (HLE) quantum. For a comprehensive comparison of HDB vs bank loan economics, use our HDB Loan vs Bank Loan Calculator. Also consider running your total affordability through the Home Loan Affordability Calculator.
Lease Decay and Your Retirement Property Plan
Many Singaporeans anchor their retirement plan around monetising their HDB flat — whether through subletting spare rooms, downgrading to a smaller flat to release equity, or the Silver Housing Bonus scheme. Lease decay directly erodes this asset’s resale value over time, making early awareness critical for retirement planning.
A couple in their 40s who own a flat with 55 years remaining will, by retirement at 65, hold a flat with only 35 years left. At that point, CPF restrictions kick in for potential buyers, bank loans are limited, and resale demand is materially reduced. The flat’s realisable equity in retirement may be far lower than expected if this decay isn’t factored into the retirement plan today.
The solution is proactive planning: use our Retirement Planning Calculator to model your required retirement corpus independent of your flat’s value. Supplement your retirement assets through regular investing — CPFIS, SRS, or robo-advisors like Endowus and Syfe allow you to invest CPF OA and SRS funds in diversified portfolios. This ensures your retirement income doesn’t hinge solely on what an ageing leasehold flat can fetch in the resale market 20 years from now. Read our Singapore Passive Income Guide 2026 for a broader framework on building retirement income streams beyond property.
Frequently Asked Questions
What is HDB lease decay and why does it matter?
HDB lease decay refers to the reduction in an HDB flat’s remaining leasehold tenure over time. Since most HDB flats carry a 99-year lease from HDB (after which the land reverts to the state), the flat’s pro-rated value, CPF eligibility, and bank loan accessibility all decline as years pass. It matters because many Singaporeans’ largest asset is their HDB flat — and buyers who overlook lease decay may face significant financing restrictions and lower resale proceeds in retirement.
How does HDB calculate pro-rated value for older flats?
HDB uses a simple linear pro-ration formula: Adjusted Value = Market Value × (Remaining Lease ÷ Original Lease). For a flat with a S$600,000 valuation and 70 years remaining on a 99-year lease, the adjusted value is S$600,000 × (70 ÷ 99) = S$424,242. This adjusted value determines your CPF Valuation Limit — the maximum CPF OA amount you can use for the purchase.
Can I use CPF to buy an HDB flat with less than 60 years remaining?
Yes, but with restrictions. CPF Board’s “cover to 95” rule requires the remaining lease to cover the youngest buyer to at least age 95 for full CPF usage. If the lease covers the buyer to between 65 and 95, CPF usage is pro-rated and capped. If the lease doesn’t cover the buyer past age 65, no CPF OA funds can be used. For example, a 40-year-old buying a flat with 50 years remaining (covers them to age 90) would face a pro-rated CPF cap, not a full restriction.
What is the minimum remaining lease for an HDB loan?
HDB loans require a minimum of 20 years of remaining lease on the flat. Bank loans are more restrictive — lenders generally require at least 30–35 years of remaining lease, and many set a practical minimum of 60 years to avoid tenure restrictions. If the remaining lease minus 30 years is less than the desired loan tenure, the bank will reduce the approved tenure accordingly, which significantly increases monthly repayments.
Is a 99-year HDB flat a good investment given lease decay?
A 99-year leasehold HDB flat can be a sound investment in its early decades, especially in well-located estates. The key is buying with sufficient lease remaining to ensure CPF access, bank loan eligibility, and future resale demand. Flats with 70+ years remaining retain strong financing flexibility. Below 60 years, CPF restrictions start affecting a growing pool of buyers, compressing resale demand and prices. Buyers should factor in their intended holding period and retirement timeline when assessing lease risk.
What is SERS and does it protect against lease decay?
SERS (Selective En Bloc Redevelopment Scheme) is an HDB programme where selected older estates are redeveloped, and flat owners receive market compensation plus priority access to replacement units at subsidised prices. SERS effectively resets the lease for affected owners. However, SERS selection is entirely at HDB’s discretion, applies to a small fraction of HDB estates, and cannot be relied upon as a guaranteed lease decay hedge. Since the 1990s, under 5% of HDB flats have undergone SERS.
How does lease decay affect my retirement plan if my HDB flat is my main asset?
If your HDB flat is your primary retirement asset, lease decay can materially reduce the equity you can realise through downgrading or subletting in retirement. A flat with 35 years remaining at retirement faces financing restrictions for future buyers, depressing its resale value and demand. Financial planners recommend supplementing your property wealth with diversified investments through CPFIS, SRS, or regular savings — so your retirement income isn’t entirely dependent on an ageing leasehold flat’s resale proceeds. Our Retirement Planning Calculator can model this scenario.
Which HDB estates are most at risk from lease decay in Singapore?
Flats built in the 1960s–1980s in mature estates such as Queenstown, Toa Payoh, Ang Mo Kio, Bukit Merah, and Geylang are most at risk, as many now have fewer than 60 years of lease remaining. These flats are trading at strong prices due to location premiums, but buyers should model the full lease decay impact — especially younger buyers whose age-plus-lease doesn’t reach 95 — before committing. The calculator above lets you model any specific flat’s remaining lease and eligibility status.
Should I use my CPF savings for an older HDB flat or invest them instead?
This depends on your alternative investment returns and your housing need. CPF OA earns a guaranteed 2.5% p.a. — if used for a flat with strong lease decay risk, you may lose more in accrued interest (owed back to CPF on resale) than you gain in property appreciation. If the flat’s remaining lease is short enough to cap your CPF usage anyway, channelling surplus CPF OA into CPF Investment Scheme (CPFIS) instruments — such as Singapore bonds, REITs, or unit trusts via platforms like Endowus — may deliver better long-term retirement outcomes. This is a personal finance decision that should be discussed with a licensed financial adviser.
Plan Your Property and Retirement Together
Use our free Singapore financial tools to model your HDB flat’s lease decay, compare loan options, and build a retirement plan that doesn’t rely solely on property wealth.