Every HDB flat in Singapore starts with a 99-year lease. From the day the lease begins, it counts down — and as years pass, the practical implications for buyers and sellers shift in ways most people don't think about until they're in the middle of a transaction.
Lease decay isn't a sudden cliff. It's a gradual narrowing of who can buy your flat and on what terms.
The three thresholds that matter
Below 60 years remaining. When a flat's lease drops below 60 years, CPF usage rules tighten. Buyers can still use their CPF Ordinary Account funds, but the amount is capped based on a formula involving the buyer's age and the flat's remaining lease. The shorter the lease, the less CPF a buyer can draw on. For most Singapore buyers who rely heavily on CPF for the purchase price, this directly reduces how much they can spend — and therefore how many buyers your flat is accessible to.
Below 30 years remaining. Once a flat's remaining lease drops below 30 years, HDB will no longer grant a loan for it, and most banks won't either. At this point the flat becomes effectively a cash-only purchase, which sharply limits demand. The buyer pool contracts to a small group willing and able to pay entirely in cash.
The age-plus-lease calculation. Even for flats with more than 60 years remaining, there's an additional CPF rule: the buyer's age plus the flat's remaining lease must equal at least 80 years for full CPF usage. A 50-year-old buying a flat with 28 years left won't clear this threshold, for instance. This catches some buyers off guard when they're looking at older flats that still appear to have comfortable leases on paper.
What lease decay does to price
Lease decay compresses the buyer pool. Fewer buyers competing for your flat means less upward pressure on price — and often longer time on market before a deal closes.
The effect isn't uniform. A flat in a popular estate near an MRT station with strong school proximity can absorb some lease decay pressure better than a comparable flat with none of those attributes. Buyers in high-demand locations accept more constraints to get what they want. But all else equal, lease decay is a measurable discount factor — and one that grows over time.
What Healthy, Monitor, and Elevated Risk mean
In the free block report Cham provides, each flat's lease situation is rated across three categories:
- Healthy — remaining lease is above 60 years. No CPF or financing restrictions apply for most buyers. Full buyer pool.
- Monitor — remaining lease is between 40 and 60 years. CPF usage is partially restricted, which starts to narrow who can buy. Time to be aware of this in your pricing and marketing approach.
- Elevated Risk — remaining lease is under 40 years. Significant CPF and financing restrictions apply. Your realistic buyer pool is materially smaller, and this needs to be factored into asking price.
What sellers should do
If your flat is approaching or already in the Monitor zone, the most important thing is to understand what recent done deals look like for your block — not asking prices, actual transacted prices. Flats with healthier leases in the same area will appear in the same search results as yours, and buyers will compare. If you price without acknowledging the lease difference, you'll sit on the market longer than you need to.
For flats in Elevated Risk, a clear-eyed conversation about who the realistic buyer is — and what financing they can access — is worth having before you decide on price or timing.