Every working Singaporean's CPF contributions get split across the Ordinary Account, Special Account, and MediSave Account. The two that drive your retirement wealth are the OA and the SA. The OA is the flexible workhorse — it pays your housing, and it earns the lower floor rate. The SA is the retirement engine — it earns a higher rate but is locked away until 55. Knowing which one to feed, and when, can add tens of thousands of dollars to your eventual CPF LIFE payout. CPF reviews its interest rates every quarter and has been changing scheme rules (notably around the SA at age 55), so treat every figure below as a starting point and confirm the current numbers and rules with the CPF Board before acting.
| CPF Ordinary Account (OA) | CPF Special Account (SA) | |
|---|---|---|
| Base interest rate (floor, as of 2026 — verify with CPF Board) | Higher of the formula rate or the 2.5% legislated floor (currently at the 2.5% floor) | Higher of the formula rate or the 4% floor (currently at the 4% floor) |
| Extra interest, members below 55 (CPF Board) | Part of the +1% on the first S$60,000 of combined balances (OA portion capped at S$20,000) | Part of the +1% on the first S$60,000 of combined balances |
| Extra interest, members 55 and above (CPF Board) | Part of the +2% on the first S$30,000 and +1% on the next S$30,000 (OA portion capped at S$20,000) | n/a — the SA is closed at 55 (balances move to the Retirement Account) |
| Primary purpose | Housing, education, insurance, approved investments | Retirement income |
| Can pay for housing? | Yes — HDB and private property | No |
| Liquidity before 55 | Usable now for housing, education and CPFIS investing | Effectively locked until 55 |
| Accepts RSTU top-ups (with tax relief)? | No (RSTU goes to SA/RA, not OA) | Yes — up to the relief cap, earns the SA floor rate |
| Investable via CPFIS | Yes (CPFIS-OA, on OA savings above the S$20,000 set-aside) | Being wound down — CPF has stopped new CPFIS-SA investments; verify current rules with CPF Board |
| What happens at 55 | Used to top up the Retirement Account after the SA; remainder withdrawable | Closed; balance moves to Retirement Account (up to the Full Retirement Sum), excess to OA |
| Transfer between them (before 55) | Can transfer OA to SA up to the Full Retirement Sum (S$220,400 in 2026, CPF Board) — irreversible | Cannot transfer SA back to OA |
| SA 'shielding' before 55 (legacy hack) | n/a | No longer works — since the SA was closed at 55 on 19 Jan 2025, divested CPFIS-SA proceeds now return to the OA at 2.5%, not the SA (CPF Board) |
Treat the OA as your housing and flexibility account, and the SA as your retirement compounding engine. The order most people should follow: first secure your housing and an emergency fund, then feed the SA — via RSTU top-ups (a guaranteed SA-floor return plus income tax relief) before considering any OA-to-SA transfer. Only transfer OA to SA once you are confident you will never need that money for property, because the move is permanent and cannot be reversed (the OA-to-SA transfer is capped at the Full Retirement Sum, S$220,400 in 2026). If buying a home is still ahead of you, leave the OA alone — liquidity you've already committed to a house is worth more than the roughly 1.5 percentage points of extra interest you can't access. One thing that has changed: the old 'SA shielding' move around age 55 no longer works, because the SA is now closed at 55 and divested CPFIS proceeds return to the OA at 2.5%, not the SA — so plan your retirement-sum top-ups towards the Retirement Account instead. Before acting, confirm the prevailing OA and SA rates for the quarter, the extra-interest bands, the Full Retirement Sum, the RSTU relief caps, and the current SA-at-55 rules with the CPF Board and IRAS.
As of 2026, the OA earns the higher of a formula rate or its 2.5% legislated floor, and the SA earns the higher of a formula rate or its 4% floor (CPF Board) — both have been sitting at their floors, a gap of about 1.5 percentage points. On top of the base rate, CPF pays extra interest on your combined balances: for members below 55, an extra 1% on the first S$60,000 (the OA portion of that base is capped at S$20,000). For members 55 and above, CPF pays an extra 2% on the first S$30,000 and an extra 1% on the next S$30,000 (again with the OA portion of the base capped at S$20,000). CPF reviews these rates every quarter, so verify the current figures with the CPF Board before relying on them.
Yes — while you're below 55 you can transfer OA savings into your SA up to the Full Retirement Sum (S$220,400 in 2026, CPF Board), and it will earn the higher SA rate. The catch: the transfer is irreversible. Once the money is in the SA you cannot move it back to the OA or use it for a property purchase. Only do this with money you are certain you won't need for housing, and check the prevailing Full Retirement Sum with the CPF Board first, as it rises each year.
For retirement, the SA wins because of the higher rate and the long compounding runway. RSTU (Retirement Sum Topping-Up Scheme) top-ups go to the SA, not the OA, and they can also qualify for income tax relief (subject to annual caps — confirm with IRAS/CPF) — so you get a guaranteed SA-floor return and a smaller tax bill. Prioritise the OA only if you still need the flexibility for housing or education.
No. RSTU only tops up the Special Account (or the Retirement Account from age 55). The Ordinary Account does not receive RSTU top-ups, and ordinary OA voluntary contributions don't get the same dedicated tax relief. If your goal is guaranteed retirement growth plus tax relief, RSTU into the SA is the route — check the current relief caps with IRAS/CPF.
At 55 a Retirement Account (RA) is created, and savings are used to set aside your retirement sum. Under changes that took effect on 19 January 2025, the Special Account is closed at 55: SA savings move to the RA up to your cohort's Full Retirement Sum (where they keep earning the long-term rate), and any remainder moves to the OA (which is withdrawable and earns the OA rate). Because these rules have changed recently, confirm the current treatment with the CPF Board before making transfer decisions near 55.
It depends on whether you've already covered housing and emergencies. The extra interest — roughly 1.5 percentage points a year at the current floors — compounds into a meaningful sum over decades, but it comes at the cost of total illiquidity until 55. If you might still buy a home, that flexibility is worth more than the extra interest. Lock money into the SA only after your housing plan and emergency fund are settled.
For members turning 55 in 2026, the Basic Retirement Sum (BRS) is S$110,200, the Full Retirement Sum (FRS) is S$220,400 (double the BRS), and the Enhanced Retirement Sum (ERS) is S$440,800 (CPF Board). From 2025 the ERS was raised to four times the BRS (it was previously three times the FRS), letting members top up more to the Retirement Account for higher CPF LIFE payouts. Before 55, OA-to-SA transfers are capped at the FRS; from 55, you can top up the Retirement Account up to the ERS. These sums increase each year, so check the figure for your own cohort with the CPF Board.
No. SA shielding was a manoeuvre where members about to turn 55 temporarily moved their SA money into a low-risk CPFIS-SA investment so that less cash flowed into the Retirement Account, keeping more savings earning the higher SA rate afterwards. Since the SA was closed at 55 on 19 January 2025, the trick no longer works: when you divest those investments, the proceeds now return to the Ordinary Account at 2.5%, not the SA at 4% (CPF Board). The remaining option is to transfer OA savings into the Retirement Account (which still earns the higher long-term rate) up to the Enhanced Retirement Sum. Because this area changed recently, confirm the current mechanics with the CPF Board before planning around age 55.
MediSave is the third CPF account, and it sits outside the OA-versus-SA decision. It is earmarked for approved medical expenses, MediShield Life and CareShield Life premiums, and certain treatments, and it earns the same higher floor rate as the SA (4% as of 2026, CPF Board). You cannot use MediSave for housing or general retirement income, and contributions into it stop once it hits the Basic Healthcare Sum, after which the overflow is redirected (to the SA before 55, or the Retirement Account from 55). So when deciding between feeding the OA or the SA, treat MediSave as a separate healthcare pot that fills up on its own — verify the current Basic Healthcare Sum and rules with the CPF Board.