CPF (Central Provident Fund) is the most useful and most misunderstood tool in any Singapore property purchase. Used well, it provides interest-free leverage at 2.5% opportunity cost. Used carelessly, it locks up retirement savings inefficiently and creates refund obligations on sale. Here's how the rules actually work.

Which CPF accounts you can use

  • Ordinary Account (OA): the primary source for property funding. Earns 2.5% per annum baseline.
  • Special Account (SA): cannot be used for property. Earns 4% per annum and is reserved for retirement.
  • Medisave Account (MA): cannot be used for property.

All property funding from CPF comes from OA only. Your OA balance + ongoing OA contributions during the loan period are what's available.

What you can use OA for

  • Down payment: partial or full (subject to LTV cash component requirements — 5% must be cash for first mortgage)
  • Monthly mortgage instalments: principal and interest
  • Stamp duties: BSD and ABSD (subject to having sufficient OA)
  • Legal fees
  • Conservancy charges / MCST fees: NO. These are out-of-pocket.
  • Property tax: NO. Out-of-pocket.

The Valuation Limit (VL)

The Valuation Limit caps how much CPF you can use, set at the lower of:

  • Purchase price, OR
  • Valuation at time of purchase

If you bought a SGD 1.5M property with valuation of SGD 1.45M, your VL is SGD 1.45M. CPF use beyond SGD 1.45M must be funded by cash.

The Withdrawal Limit (WL)

Beyond the VL, there's a lifetime Withdrawal Limit set at 120% of VL. Once your cumulative CPF use (including accrued interest on amounts used) hits the WL, you must fund all future mortgage payments in cash from that property.

For a property with VL of SGD 1.45M, WL = SGD 1.74M. Cumulative CPF use beyond SGD 1.74M for that property is not allowed.

The Basic Retirement Sum (BRS) condition

For second and subsequent property purchases using CPF, you must set aside the BRS first. BRS in 2026 is SGD 105,000. Only CPF balances above BRS can be used for the second property.

For first-time property buyers, no BRS requirement (you can use full OA balance).

The accrued interest reality

The single most misunderstood part of CPF property use: CPF tracks the interest you "would have earned" had the money stayed in OA. When you sell, this accrued interest must be refunded to your CPF along with the principal.

Worked example: You used SGD 200,000 from CPF for a property in 2020. Held until 2030 (10 years). Accrued interest at 2.5% compound: SGD 256,017 - 200,000 = SGD 56,017.

When you sell in 2030: you must refund SGD 200,000 principal + SGD 56,017 interest = SGD 256,017 to your CPF account. Only after this refund are remaining sale proceeds yours to keep in cash.

Cash vs CPF: the real opportunity cost

Many buyers wonder if they should preserve CPF and pay cash. The math:

  • CPF in OA earns 2.5% per annum
  • Cash typically earns 2.5–4.0% per annum in T-bills, MMF, or fixed deposits in 2026
  • Property mortgage rates are 3.0–3.5%

Using CPF saves you 0.5–1.0% per annum vs paying out of cash that's earning 3%+ elsewhere. Over a 25-year mortgage on SGD 1M, this is SGD 125–250k in opportunity cost.

The optimisation: use cash for property when cash is earning more than 2.5%; use CPF when cash is earning less. In high-rate environments like 2024–2025, paying cash was often optimal. In low-rate environments, using CPF wins.

The refund-on-sale trap

Owners often forget the CPF refund obligation when calculating net sale proceeds. Example: sale price SGD 2,000,000, mortgage outstanding SGD 800,000, CPF refund (including accrued interest) SGD 450,000.

Sale proceeds netted: SGD 2,000,000 - 800,000 - 450,000 (to CPF) - SGD 60,000 (commission + legal) = SGD 690,000 cash.

The SGD 450,000 goes back to your CPF account, where it can be used for the next property — but it's not cash in hand. Plan accordingly.

Optimisation strategies

  1. Use CPF for down payment when cash earns less than 2.5%. Otherwise consider paying cash.
  2. Set up automatic monthly CPF deduction for instalments. Simpler than choosing monthly. Default option in HDB transactions.
  3. Voluntarily top up OA to maximise CPF use. Available if you're under VL/WL caps. Earns 2.5% guaranteed plus tax relief on certain amounts.
  4. Refinance to lower-rate mortgage every 2–3 years. Reduces monthly payment, reducing CPF drawdown rate.
  5. Track accrued interest annually. Build mental forecast of total refund obligation at expected sale date.

The bottom line

CPF is a powerful, subsidised financing tool for Singapore property — but it's not free money. The accrued interest mechanism means you're borrowing from your own retirement at 2.5% per annum. For buyers with cash earning less than 2.5% elsewhere, CPF use is straightforward. For buyers with productive alternative uses of cash (or higher-yielding cash holdings), cash funding may be optimal.

For a CPF optimisation analysis on your specific situation, request a consultation.