Your HDB Flat and the 99-Year Clock: What Every Buyer and Seller Should Know

September 2026  ·  DoubleHuat Market Insights

Every HDB flat comes with a 99-year lease. From the day it is built, the clock starts ticking — and that clock quietly decides three big things: how much the flat is worth, how much CPF you can use, and how big a loan the bank will give you.

Most of us focus on the renovation, the floor level, or how near it is to the MRT. Fair enough. But when a flat gets older, the remaining lease becomes the number that matters most. Get this right and you buy smart. Get it wrong and you may overpay — or struggle to sell later.

Here is the whole thing in plain English.

What "Lease Decay" Really Means

Lease decay is simply this: as the years on the lease run down, the flat slowly loses value.

• In the early years, this barely shows. A flat with 90 years left feels almost as good as brand new, so prices can still go up.
• The drop speeds up once the lease falls below about 60 years. After that, each passing year bites harder.
• Think of it like a car. A 2-year-old car and a brand-new one are close in price. But a 15-year-old car? The gap is huge, and it widens fast every year after.

As a rough guide, here is how the value of leasehold land falls as the lease runs down. This is based on the Singapore Land Authority's leasehold table, often called "Bala's Table":

• Fresh 99-year lease: worth about 96% of freehold land value
• 60 years remaining: about 80%
• 50 years remaining: about 75%
• 30 years remaining: about 60%

Notice the shape: from 99 down to 60 years, the value only drifts down slowly (96% to 80% over roughly 40 years). But from 60 years onward, it falls faster. That is why the "below 60 years" mark is the one to watch.

Note: these are guideline percentages of land value, not your flat's exact resale price. Real prices also depend on demand, location, floor, and condition.

Why Older Flats Get Harder to Sell

This is the part many people miss. It is not just about sentiment. The Government's own rules on CPF and loans make older flats harder to finance — and that shrinks the pool of buyers who can afford them.

The key test is the "age 95" rule:

Here is how it plays out:

• If the lease covers the youngest buyer to age 95 or beyond: you can use your full CPF (up to the flat's Valuation Limit), and you can get up to 75% loan-to-value — the standard HDB loan limit today.
• If the lease is at least 20 years but does not reach age 95: you can still use CPF, but only a reduced (pro-rated) amount. Your loan is also smaller, because the loan length is capped by the lease. The shortfall must be topped up in cash.
• If the lease has less than 20 years left: no CPF can be used at all, and there is no HDB loan. It becomes a cash-only purchase.

A real example (round numbers):

• Ahmad is 40. He is eyeing a flat with 50 years of lease left.
• 40 + 50 = 90. That is 5 years short of 95.
• So Ahmad cannot use his full CPF — it gets reduced (roughly 50/55, about 91% of the limit). The rest, he must find in cash.
• Now imagine a younger buyer, Wei Ling, age 30, looking at the same flat. 30 + 50 = 80 — even further from 95. Her CPF is cut back even more.
• See the problem? The older the flat, the fewer buyers who can comfortably afford it — especially younger ones. That weaker demand pushes the resale price down.

Buying an Older Flat? Run These 3 Checks First

Older flats can be a smart buy — cheaper upfront, often in mature, central estates with everything nearby. Just go in with your eyes open. Before you make an offer:

• 1. Do the "age 95" sum. Add the youngest buyer's age to the remaining lease. If it hits 95 or more, you unlock full CPF and the full loan. If not, be ready with more cash.
• 2. Compare against recent sales. Look at flats of similar age, size, and floor in the same town that sold recently. That tells you if the asking price is fair — not the agent's story.
• 3. Mind the floor and the location. High-floor units and flats near an MRT or town centre tend to hold their value better, softening the effect of lease decay.

And for sellers, the flip side:

• Demand is strongest while the lease is comfortably above 60 years.
• If you are thinking of selling an ageing flat, earlier is usually easier — the financing rules work in your favour, and more buyers can pay.