Many people in their late 50s and 60s have a large sum sitting in their CPF Ordinary Account (OA). The CPF OA interest rate is 2.5% a year, guaranteed, with no risk of loss. Set against inflation, that is roughly enough to keep up: you gain spending power if prices rise 2% a year and fall slightly behind if they rise 3%.
Here is the maths, using round numbers and the Monetary Authority of Singapore’s own inflation forecasts.
The 2.5% Is a Floor, Not a Forecast
The OA rate is pegged to the three-month average of major local banks’ interest rates, reviewed every quarter. It is subject to a legislated minimum of 2.5% a year.
Because the pegged rate has been below that floor, the OA is earning exactly 2.5% from October to December 2026. That rate is guaranteed. Your OA balance does not go down when markets fall.
Some members earn extra interest on the first S$60,000 of combined balances, with up to $20,000 of OA money counting. But extra interest earned on OA money goes into the Special or Retirement Account, not the OA. We leave it out below.
The Maths: $200,000 at 2.5% for 15 Years
CPF interest is credited once a year and then earns interest itself. At 2.5% a year, compounded annually, $200,000 grows like this:
| After | Balance |
|---|---|
| 5 years | $226,282 |
| 10 years | $256,017 |
| 15 years | $289,660 |
The formula is $200,000 × 1.025¹⁵, where 1.025¹⁵ (1.025 multiplied by itself 15 times) is about 1.448. Over 15 years, you earn about $89,660 in interest without lifting a finger.
That is the nominal picture. The real question is what that $289,660 will buy.
The short version: At 2.5% a year, $200,000 in the OA grows to about $289,660 in 15 years, guaranteed. Whether that is a gain in spending power depends on inflation. If prices rise 2% a year, you are ahead. If they rise 3% a year, you fall slightly behind.
CPF OA Interest Rate vs Inflation: What $289,660 Will Buy
The table below shows what $289,660 in 15 years would be worth in today’s dollars at different inflation rates.
Illustration only, not a guarantee. Assumes the OA earns exactly 2.5% a year throughout and inflation is constant at the rate shown.
| Average inflation | Value in today’s dollars after 15 years | Change in spending power |
|---|---|---|
| 1.5% a year | $231,685 | Up about $31,700 |
| 2.0% a year | $215,221 | Up about $15,200 |
| 2.5% a year | $200,000 | No change |
| 3.0% a year | $185,921 | Down about $14,100 |
For context, MAS’s October 2026 Macroeconomic Review expects core inflation to average 1.5% to 2.0% in 2026 and 1.5% to 2.5% in 2027. Headline inflation is expected to be around 2.0% in 2026 and 1.5% to 2.5% in 2027.
Nobody knows what inflation will average over the next 15 years. The honest summary is that at recent forecast levels, the OA roughly keeps pace, with a modest margin either way.
What This Looks Like at the Checkout
Another way to see it: suppose your household spends $3,000 a month today.
- At 2% inflation, the same basket costs about $4,040 a month in 15 years.
- At 3% inflation, it costs about $4,670 a month.
Your personal inflation rate may differ from the national figure. It depends on what you spend on, and spending patterns often change after retirement.
Your Options for Money Above What You Need to Keep
If you are 55 or older and have more in the OA than you need for the next few years, there are broadly three things you can do with the surplus. Each involves a trade-off.
Keep it in the OA. Guaranteed 2.5%, no market risk, and it stays available, subject to CPF’s withdrawal rules. The cost is that growth may only just match inflation.
Move it to your Retirement Account. If you are 55 or older, you can top up your RA up to the current Enhanced Retirement Sum ($440,800 in 2026, rising to $456,400 on 1 January 2027). RA savings earn the 4% floor, which the Government has extended to 31 December 2027. The trade-off: the move is irreversible, and the money is paid out as monthly CPF LIFE income rather than being available as a lump sum. See topping up your Retirement Account between 55 and 64.
For comparison only: if 4% applied every year for 15 years, $200,000 would grow to about $360,189. The floor is confirmed only until the end of 2027, so treat this as an illustration, not a guarantee.
Invest part of it. Investments offer potentially higher, non-guaranteed returns. They can also go down as well as up, and a fall just before you need the money hurts more at 60 than at 30. Fees and how long you can leave the money untouched matter a great deal. For the lower-risk end, see the break-even maths for T-bills and fixed deposits bought with OA money.
Many retirees combine these: enough in cash and the OA for near-term needs and emergencies, more in the RA for lifelong income, and only money they will not need for years exposed to markets. Our guide to CPF strategies by age sets out each move, and the CPF interest projector lets you test your own balance.
What To Do Next
- Log in to your CPF account and note your OA balance and what it is earmarked for (housing, emergencies, gifts to children).
- Estimate your monthly spending today, then use the figures above to see what it may look like in 10 to 15 years.
- Use the CPF Board’s Retirement Payout Planner to see how an RA top-up would change your monthly income.
- Before moving any money, ask: when will I need it, can I get it back, and what happens if markets fall?
