The CPF Special Account (SA) is a long-term savings account earning 4% p.a., higher than the Ordinary Account’s 2.5%. But since January 2025, CPF closes your SA the moment you turn 55 — your savings move into your Retirement Account (up to the Full Retirement Sum) and Ordinary Account. Here’s how the 2026 interest rates, closure rules, and CPFIS-SA investing actually work.

Not financial advice. All figures are for educational reference only. Data as at July 2026 unless noted.

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What Is the CPF Special Account (SA)?

Your CPF savings are split across up to four accounts: the Ordinary Account (OA), Special Account (SA), MediSave Account (MA), and — once you turn 55 — the Retirement Account (RA).

The SA is built specifically for your retirement. Unlike your OA, which you can use for housing and approved investments, SA money is meant to stay put and grow at a higher interest rate until you need it for retirement income.

Here’s the part that trips people up: since January 2025, the SA only exists for members below 55. Once you hit 55, your SA closes and its purpose is taken over by your Retirement Account. We’ll walk through exactly how that works below.

CPF SA Interest Rate 2026: How Much You Actually Earn

Your SA earns a base rate of 4.0% p.a. from July to September 2026, according to the CPF Board’s official interest rate announcement. CPF interest rates are reviewed quarterly, but the government has extended the 4% floor rate on Special, MediSave and Retirement Account monies until 31 December 2026.

On top of the base rate, CPF pays extra interest — and the tier depends on your age:

• Below 55: an extra 1% on the first $60,000 of your combined OA, SA and MA balances (capped at $20,000 from your OA).
• 55 and above: an extra 2% on the first $30,000 of combined balances, and an extra 1% on the next $30,000 (also capped at $20,000 from OA).

That means members aged 55 and above can earn up to 6% p.a. on the first $30,000 of their combined balances — 4% base plus 2% extra interest.

*SA only exists for members below 55 (closed for 55 and above since January 2025). ²Combined OA+SA+MA balances, capped at $20,000 from OA. Source: CPF Board, interest rates July–September 2026.

Say you’re 40 with $50,000 in your SA and $15,000 in your OA. Under the extra interest scheme, the first $60,000 of your combined balances earns an extra 1% (capped at $20,000 from your OA). In practice, most of your SA balance earns close to 5% effective interest until your combined balances cross that $60,000 mark.

Why the CPF Special Account Closes When You Turn 55

On 19 January 2025, CPF closed the Special Accounts of about 1.4 million members aged 55 and above. This wasn’t a one-off event — it’s now a permanent rule. Every member’s SA closes automatically the day they turn 55.

Here’s why. Before 2025, some members kept large SA balances well past 55, even though the money would eventually be used to fund their Retirement Account anyway. CPF simplified this by folding SA into RA at 55, so your retirement savings sit in one account instead of two.

From the day your SA closes, any future CPF contributions that would have gone to SA are instead allocated fully to your RA, up to the Full Retirement Sum (FRS).

What Happens to Your SA Money at 55 (RA vs OA)

When your SA closes, the money doesn’t disappear. It’s split between two accounts based on a clear rule:

• Up to your cohort’s Full Retirement Sum (FRS) moves from your SA into your new Retirement Account, where it keeps earning 4% p.a.
• Any remaining SA savings move into your Ordinary Account, where they earn 2.5% p.a. — and you can withdraw them anytime.

Say your SA held $180,000 when you turned 55 in 2026, and your OA held $50,000. Your first $220,400 (the 2026 FRS) gets pulled into your RA — since your SA only has $180,000, all of it moves across, and CPF tops up the remaining $40,400 from your OA to reach the FRS. The rest of your OA, $9,600, stays in your OA earning 2.5% p.a. and remains withdrawable.

If you’d rather keep earning the higher 4% rate on that OA balance instead of withdrawing it, you can voluntarily transfer it into your RA — up to the current year’s Enhanced Retirement Sum (ERS).

Source: CPF Board, 2026. BRS and FRS are locked in at the year you turn 55 and stay fixed for life. ERS rises annually and applies to all members 55 and above.

OA, SA, MA and RA: How the Four Accounts Work Together

If you’re still below 55, it helps to see the full picture of where your CPF contributions actually go:

• Ordinary Account (OA): housing, insurance, investment, and education. Earns 2.5% p.a.
• Special Account (SA): retirement savings, currently earning 4% p.a. Closes at 55.
• MediSave Account (MA): healthcare and MediShield Life premiums. Earns 4% p.a., capped at the Basic Healthcare Sum.
• Retirement Account (RA): created at 55, funds your CPF LIFE monthly payouts from age 65.

Every dollar you or your employer contributes gets split across OA, SA and MA using age-based allocation rates. The younger you are, the more goes into your OA; the closer you get to 55, the more shifts toward SA to build up your retirement pot faster.

For a deeper walkthrough of what happens to each account at 55, see our CPF withdrawal guide for 2026.

Can You Still Invest Your CPF SA? CPFIS-SA Rules 2026

Yes — if you’re below 55 and want to try for returns above the 4% base rate, the CPF Investment Scheme for SA (CPFIS-SA) lets you invest part of your SA savings. But the rules are stricter than CPFIS-OA.

• You must set aside the first $40,000 in your SA before investing the rest.
• CPFIS-SA money can only go into low- to medium-risk unit trusts from CPF’s approved List A, fixed deposits, and certain insurance products.
• You cannot buy individual stocks, ETFs, or REITs with SA money — that’s only allowed under CPFIS-OA.
• There’s no need to open a separate CPF Investment Account for SA — you approach the product provider directly.

Because the 4% guaranteed, risk-free rate is already hard to beat after fees, most Singapore investors only consider CPFIS-SA investing if they’re confident a specific low-risk fund will outperform SA’s rate net of sales charges and management fees over the long run. For a closer look at how CPF investing fits into your broader portfolio, read our CPF investment strategy guide.

If you’re investing your OA instead, which has a much wider range of eligible instruments including S-REITs and ETFs, our Singapore REIT ETF guide is a good next read.

Is “CPF SA Shielding” Still a Thing in 2026?

If you’ve read older personal finance blogs, you may have come across “SA shielding” — a strategy where members near 55 moved most of their SA savings into CPFIS-SA investments just before their birthday, then sold the investments and moved the cash back into SA right after.

The point was to stop CPF from sweeping high-interest SA money into RA, so that lower-interest OA money got used to fund the FRS instead — leaving more of the shielded SA cash to reinvest at 4% afterwards.

Since your SA closes the moment you turn 55, there’s no longer a separate SA balance left to protect at that point — the closure happens automatically and the transfer rule (FRS from SA first, top-up from OA if needed) applies regardless of what you’ve invested. If you still see “SA shielding” tips online, treat them as outdated advice written before January 2025.

The closest legitimate alternative today is topping up your RA directly — via cash or CPF transfer — up to the ERS, so you deliberately lock in more savings at the 4% rate instead of relying on account-closure timing tricks.

Should You Top Up Your CPF Special Account?

If you’re below 55, topping up your SA (or your RA if you’re 55 and above) directly boosts your retirement savings at a guaranteed 4% p.a. — a rate that’s hard to match risk-free anywhere else in Singapore.

Cash top-ups also come with tax relief: you can claim up to $8,000 in tax relief for topping up your own SA or RA, plus another $8,000 for topping up a loved one’s account, subject to the FRS cap on your recipient’s account.

The trade-off is liquidity. Once money goes into SA or RA, it’s locked up until 55 (for SA-turned-RA money) or until CPF LIFE payouts begin at 65. Before topping up, make sure you already have enough liquid savings for near-term needs — an emergency fund, insurance, and any big expenses in the next few years.

Use our CPF RA Top-Up Calculator to see how a top-up today could grow by the time you start drawing CPF LIFE payouts, or run the numbers on your overall retirement plan with our retirement planning calculator.

If you’re investing outside CPF as well, comparing platforms matters. Endowus and Syfe both offer CPF-friendly investment options for your Ordinary Account alongside cash and SRS portfolios — worth comparing against CPFIS-SA’s narrower fund list before deciding where your CPF savings should sit.

Frequently Asked Questions