CPF gets talked about mostly as a savings scheme, but the interest it pays is arguably the more interesting part — especially once you understand how the tiers stack. Here’s how the mechanics actually work, without quoting numbers that will be outdated by the time you read this.
Four accounts, not one pot
CPF interest isn’t a single rate applied to a single balance. Your CPF savings sit in up to four accounts, each earning its own rate:
- Ordinary Account (OA) — used for housing, insurance, approved investments, and education. This is the account with the lowest base interest rate of the four, because it’s designed to be liquid and usable.
- Special Account (SA) — set aside for retirement and CPF-approved investments. It earns a higher base rate than OA, reflecting the fact that it’s locked in for longer-term goals. (Note: for members below 55, new SA has been closed as part of recent CPF changes, with existing SA savings earning interest until transferred — check the CPF Board for how this affects your specific account.)
- MediSave Account (MA) — for healthcare and approved medical expenses. It earns the same higher rate tier as SA.
- Retirement Account (RA) — created when you turn 55, funded from your OA and SA. It typically earns the highest rate of the four, since RA savings are the ones directly funding your retirement payouts.
The general pattern is: the less liquid and more retirement-focused the account, the higher the base rate. That’s a deliberate design choice, not a marketing gimmick — it nudges people toward keeping money in for the long haul. For how money actually gets into these accounts in the first place, see our guide to CPF contribution rates.
Base rates are pegged, not fixed forever
None of these rates are arbitrary numbers CPF picked once and left alone. OA interest is pegged to a formula tied to prevailing market interest rates (with a legislated floor), while SA, MA, and RA rates are pegged to a different benchmark tied to long-term government bond yields, again with a floor. Because both are reviewed periodically — OA typically each quarter — the actual percentage you’re earning can shift over the year.
This is exactly why this article won’t quote you a specific number. Whatever rate was accurate when this was written could easily be stale a quarter or two later. For the current OA, SA, MA, and RA rates, check the CPF Board’s website directly (cpf.gov.sg) — it publishes updated rates on a regular schedule.
The extra interest on your first savings
On top of the base rates, CPF pays extra interest on a portion of your balances, and this is where a lot of members leave value on the table simply by not knowing it exists.
The mechanism works roughly like this: members earn an additional percentage point of interest on the first tranche of their combined OA and SA balances (up to a set cap), and members aged 55 and above get an additional extra interest tier on part of their combined balances across OA, SA, MA, and RA, on top of the regular extra interest younger members get. The exact caps and rates have changed over the years — again, check CPF’s current published figures — but the structural idea holds: your earliest, smallest savings compound at a materially better rate than the marginal ringgit sitting above the cap.
This is one reason financial planners often suggest that even a small amount of extra voluntary contribution can be disproportionately useful — not because CPF is a high-growth investment vehicle, but because the extra interest tier on your first savings is genuinely hard to replicate risk-free elsewhere. If you or an older family member qualifies, the CPF Matched Retirement Savings Scheme takes this further with an actual government match on top.
Compounding matters more than the headline rate
CPF interest compounds annually, credited once a year, and it compounds on your whole balance including previously credited interest — not just your principal contributions. Over one year the difference between a 2.5% type rate and a 4% type rate seems small in dollar terms if your balance is modest. Over twenty or thirty years, though, that gap compounds into a genuinely large difference, especially for SA/RA-type balances that stay untouched for decades.
This is also why people who start contributing to CPF (or making voluntary top-ups) earlier tend to end up meaningfully ahead of people who start the same total contributions later — not because they contributed more, but because the money had more compounding cycles to work through.
How to actually check your current rates
Because the rates move, don’t rely on this article, an old news clipping, or a friend’s recollection. Two reliable ways to check:
- Log into your CPF account via the CPF website or Singpass app — your statement shows the rate applied to each account for the period.
- Visit the CPF Board’s official page on interest rates, which is updated each time rates are reviewed.
If a number looks meaningfully different from what you remember, it’s more likely the rate genuinely changed (or you’re comparing a base rate to a rate inclusive of extra interest) than that something is wrong with your account.
For the wider picture on how contributions, top-ups, and interest all fit together, see our CPF & Retirement Savings hub.
The bottom line
CPF interest is structured, not flat: four accounts with different base rates, extra interest layered on top of your first savings, rates that are pegged to formulas and reviewed periodically, and annual compounding that rewards starting early. Understanding that structure is more useful than memorising a number that will be out of date within a year — for the number itself, go straight to the CPF Board.