For Singapore savers looking for low-risk places to put their money, three options come up repeatedly: CPF Ordinary Account (OA), Treasury Bills (T-Bills), and Fixed Deposits. Each works differently, serves a different purpose, and has different trade-offs on returns, liquidity, and accessibility. This article explains how each one works and what distinguishes them — without telling you which to choose.
The Three Options at a Glance
| CPF OA | T-Bills | Fixed Deposits | |
|---|---|---|---|
| Issuer / guarantor | Singapore Government (CPF Board) | Singapore Government (MAS) | Banks (SDIC-protected up to S$100k) |
| Current rate (Aug 2026) | 2.50% p.a. (guaranteed) | ~1.59% (6-month) / 1.68% (1-year) | ~1.50–1.60% p.a. |
| Lock-in | Subject to CPF withdrawal rules | Until maturity (or sell on secondary market) | Until end of term (break clause applies) |
| Minimum | N/A | S$1,000 | Varies by bank (typically S$1,000–S$10,000) |
| Tax on returns | Exempt | Exempt | Technically taxable |
| Accessible for housing | Yes (CPF rules apply) | No | No |
Rates as of August 2026. Verify current rates before making any decisions.
CPF Ordinary Account (OA)
What it is
The CPF Ordinary Account is a component of Singapore's Central Provident Fund (CPF) system. It receives monthly contributions from your salary (and your employer) based on a contribution rate set by CPF Board, which varies by age.
How the interest works
CPF OA earns a guaranteed 2.50% per annum, set by the Singapore Government. This rate has been stable for many years and applies to all balances in the OA regardless of market conditions. Additionally, the first S$20,000 in your OA earns an extra 1% per annum (making it effectively 3.50% on the first S$20,000).
Interest is credited monthly, and compounded annually.
Liquidity and access
CPF OA funds are not freely withdrawable. They can be used for:
- Housing (HDB flat purchase, mortgage payments, housing loans)
- CPF Investment Scheme (CPFIS) — approved investments
- Education (under CPF Education Scheme)
- Insurance premiums (approved policies)
Cash withdrawal is generally only allowed at age 55 (subject to retirement sum requirements) or under specific circumstances (e.g. leaving Singapore permanently, terminal illness).
Who it is relevant for
CPF OA is only relevant if you already have CPF funds — it is not something you can open independently or top up with non-CPF cash (you can top up your Special Account, but not OA, via voluntary cash contributions). The question most CPF members face is whether to keep idle OA funds in CPF or move them to T-Bills or CPFIS investments.
Treasury Bills (T-Bills)
What they are
T-Bills are short-term Singapore Government securities issued by MAS, available in 6-month and 1-year tenors. They are sold at a discount to face value — you pay less than S$10,000 upfront and receive S$10,000 at maturity.
How the return works
The return is the difference between what you pay and what you receive at maturity. For example, at a 1.59% annualised yield on a 6-month T-Bill, a S$10,000 investment costs approximately S$9,921 and returns S$10,000 at maturity — a return of S$79 over six months.
Liquidity
T-Bills are locked in until maturity unless you sell on the secondary market. Secondary market prices fluctuate with interest rates — if rates have risen since you bought, you may receive less than you paid. Most retail investors hold to maturity.
You can apply using cash (via internet banking or ATM) or CPF OA funds (via CPFIS). Using CPF OA for T-Bills only makes sense when the T-Bill yield exceeds CPF OA's guaranteed 2.50% — which at current rates (August 2026) it does not.
Returns are tax-exempt
T-Bill returns are exempt from Singapore income tax for residents.
Fixed Deposits
What they are
Fixed Deposits (FDs) are time deposits offered by banks. You deposit a sum for a fixed period and receive interest at the end of the term. Unlike T-Bills, interest is paid at maturity (or sometimes monthly/quarterly depending on the product).
How the return works
You deposit a fixed sum, and the bank pays you a stated interest rate at the end of the term. For example, a 6-month Fixed Deposit at 1.55% p.a. on S$10,000 earns S$77.50 in interest over six months.
Liquidity
Fixed Deposits typically have a break clause — if you withdraw early, you may forfeit some or all of the interest earned. Some banks offer "no-penalty early withdrawal" products but these usually carry lower rates.
Deposit insurance
Fixed Deposits at Singapore banks are protected under the Singapore Deposit Insurance Corporation (SDIC) scheme, up to S$100,000 per depositor per Scheme member bank. This means your principal is protected (within the cap) even if the bank fails — something that does not apply to T-Bills (which carry no credit risk as Singapore Government obligations, so insurance is not needed).
Returns are technically taxable
Fixed Deposit interest is technically subject to Singapore income tax. In practice, most individuals fall below taxable thresholds given Singapore's progressive personal income tax rates, so this rarely results in actual tax. However, it is worth being aware of, particularly for high-income individuals or those with significant FD balances.
Key Differences Explained
Guaranteed vs market-determined returns
CPF OA offers a guaranteed 2.50% — the rate does not change with market conditions. T-Bills and Fixed Deposits are market-determined — rates change with every auction (T-Bills) or when you renew your deposit (FDs). This means CPF OA provides certainty that T-Bills and FDs do not.
Accessibility of funds
This is the most important practical difference:
- CPF OA funds: tied to CPF rules. Cannot be freely withdrawn as cash. Useful for housing, but not for general spending needs.
- T-Bills: locked until maturity (typically 6 months or 1 year). Can be sold early on secondary market.
- Fixed Deposits: locked until end of term. Early withdrawal usually forfeits interest.
If you need access to your money at short notice, none of these three options is ideal. Singapore Savings Bonds (SSBs) offer more flexibility — they can be redeemed without penalty at the end of any month.
Using CPF OA to buy T-Bills
You can use CPF OA funds to apply for T-Bills through the CPF Investment Scheme (CPFIS). However, this only makes financial sense when the T-Bill cut-off yield exceeds the CPF OA guaranteed rate of 2.50%. At current yields (August 2026: ~1.59% for 6-month T-Bills), CPF OA earns more than T-Bills — so using CPF OA for T-Bills does not improve your returns at present rates.
Safety comparison
All three are considered very safe:
- CPF OA: Singapore Government obligation
- T-Bills: Singapore Government obligation (MAS)
- Fixed Deposits: bank obligation, protected by SDIC up to S$100,000 per bank
The primary safety consideration for Fixed Deposits is the S$100,000 SDIC cap per bank. For amounts above this, splitting across banks is common.
What About Singapore Savings Bonds?
Singapore Savings Bonds (SSBs) are a fourth option worth mentioning alongside these three. SSBs are also Singapore Government securities, issued monthly by MAS. They offer:
- Step-up interest rates — the longer you hold, the higher your average annual return
- Early redemption without penalty — redeem at the end of any month
- No secondary market needed — MAS buys them back directly
- Current rates (August 2026): approximately 1.46% in Year 1, 2.11% average over 10 years
SSBs are particularly useful for those who want government-backed safety with more flexibility than T-Bills. The trade-off is a lower Year 1 rate compared to T-Bills at current yields.
Where to Find Current Rates
- CPF OA rate: cpf.gov.sg — rates are set by CPF Board and reviewed periodically
- T-Bill cut-off yields: mas.gov.sg → Auctions and Issuances → Treasury Bills
- Fixed Deposit rates: individual bank websites (DBS, OCBC, UOB, StanChart, etc.)
- SSB rates: mas.gov.sg → Singapore Savings Bonds
You can also use SG Safe Returns Buddy to compare current rates for T-Bills, SSBs, Fixed Deposits, and CPF side by side.
Key Takeaways
- CPF OA currently offers the highest guaranteed rate at 2.50% p.a., but funds are subject to CPF withdrawal rules and cannot be freely accessed as cash
- T-Bills are market-determined and currently yield around 1.59% (6-month) — below CPF OA at current rates
- Fixed Deposits offer similar rates to T-Bills with SDIC protection up to S$100,000, but interest is technically taxable
- Using CPF OA to buy T-Bills only makes sense when T-Bill yields exceed 2.50%
- SSBs offer more flexibility than T-Bills with no early redemption penalty
This article is for informational and educational purposes only. It does not constitute financial advice. Rates change frequently — always verify current figures on official sources (MAS, CPF Board) before making any decisions.