CPF Shielding Calculator
Estimate the extra interest from the CPF shielding strategy — keeping part of your Special Account earning the 4% SA rate instead of the 2.5% OA rate over your chosen horizon. This strategy applies to members under 55: the Special Account was closed for members aged 55 and above from early 2025.
The SA (or MA) balance you keep earning the higher rate after your Retirement Account is formed at 55. Applies to members under 55 — the Special Account was closed for those aged 55 and above from early 2025.
How long the shielded sum keeps earning the SA rate — e.g. until you start CPF LIFE payouts.
Estimated extra interest from shielding
$4,262
On $50,000 over 5 years (SA 4.0% vs OA 2.5%)
Value at SA rate
$60,833
Value at OA rate
$56,570
Uplift
7.53%
| Scenario | Rate | Value after 5 years |
|---|---|---|
| Shielded (earns SA rate) | 4.0% | $60,833 |
| Not shielded (earns OA rate) | 2.5% | $56,570 |
| Difference | 1.5% | $4,262 |
Estimates only. This strategy applies to members under 55 — from early 2025 the Special Account was closed for members aged 55 and above, so it is not available to them. This is a simplified illustration of the rate spread, not financial advice. It assumes annual compounding at fixed rates and ignores CPF extra-interest tiers, the Basic Healthcare Sum and retirement-sum caps, eligibility, the narrow timing window around your 55th birthday, and any investment costs or risk. Shielding involves temporarily holding funds in an investment that can lose value. Verify with the CPF Board and consider professional advice before acting.
How CPF shielding works
This strategy applies to members under 55. From early 2025 the Special Account was closed for members aged 55 and above, so shielding is no longer relevant once you reach 55 — it is something you consider in the run-up to your 55th birthday.
When you turn 55, CPF creates your Retirement Account by transferring savings up to the Full Retirement Sum — taking from your Ordinary Account first, then your Special Account. The OA earns 2.5% p.a. while the SA earns 4% p.a., so members sometimes “shield” their SA by temporarily moving it into a low-risk investment just before 55. The shielded sum then stays in the higher-earning SA after the RA is formed, and the OA is drawn down instead.
The headline figure here is simply the rate spread compounded over your horizon: amount × ((1.04)ⁿ − (1.025)ⁿ). It shows the upside of keeping money at 4% rather than 2.5% — nothing more.
Important limitations
This is an illustration, not advice. It ignores CPF’s extra-interest tiers (an additional 1%–2% on the first $60,000 of combined balances), the Basic Healthcare Sum and retirement-sum caps, eligibility, the short timing window around your 55th birthday, and the cost and market risk of the investment used to shield. Always verify the mechanics with the CPF Board and consider professional advice. For related planning, see our CPF OA-to-SA transfer, CPF LIFE payout and retirement-projection calculators.
Frequently asked questions
What is CPF shielding?
CPF shielding is a strategy used by members under 55, just before they turn 55. When your Retirement Account (RA) is formed at 55, CPF draws funds from your Ordinary Account (OA) first, then your Special Account (SA). By temporarily moving most of your SA balance into a low-risk investment beforehand, that money stays in the SA and keeps earning the higher SA interest rate (4%) instead of being moved into the RA — or it avoids being pulled in at the OA rate (2.5%). Note that from early 2025 the Special Account was closed for members aged 55 and above, so this strategy applies only to members still under 55.
How much extra interest could shielding earn?
This tool estimates it as amount × ((1 + 4%)ⁿ − (1 + 2.5%)ⁿ), where n is your horizon in years. For $50,000 shielded over 5 years that is roughly the difference between earning 4% and 2.5% compounded annually. The exact benefit depends on your balances, the timing, and CPF’s extra-interest tiers, which this simplified model does not include.
What are the risks and catches?
Shielding requires holding funds in an investment (such as a short-dated fund or T-bill) that can lose value or have costs and settlement delays. There is a narrow timing window around your 55th birthday, eligibility conditions, and rules around the CPF Investment Scheme. It is widely discussed but is not endorsed CPF advice — get professional guidance before acting.
Where do the interest rates come from?
The OA floor rate is 2.5% p.a. and the SA/MediSave/RA floor rate is 4% p.a., both in force in 2026 per the CPF Board. These calculators use those fixed floor rates; actual rates are reviewed by the CPF Board periodically.