CPF OA vs T-Bill Investment and Guaranteed Savings Plans 2026
Three calculators for the intersection of CPF and investing — where Singapore's mandatory savings system meets the capital markets. The CPF OA T-Bill Calculator answers the single hottest question in Singapore personal finance: should you use your CPF Ordinary Account money to invest in 6-month T-Bills through CPFIS, or leave it earning the guaranteed 2.5% OA interest? The Guaranteed Savings Plan Comparison Calculator evaluates capital-protected endowment and savings products from NTUC Income, Singlife, and other insurers — showing whether their projected returns beat a simple CPF SA voluntary top-up at 4%. And the CPFIS Returns Calculator projects the net performance of CPF-approved investment products (unit trusts, ILPs, ETFs, fixed deposits, gold) after deducting fund management fees, agent commissions, and the opportunity cost of losing the 2.5% OA floor rate while invested.
Understanding CPF OA T-Bill Investment in Singapore 2026 — How the CPFIS-OA T-Bill Option Works, the S$20,000 OA Retention Rule and Whether a 3.0% T-Bill Actually Beats the 2.5% CPF OA Floor After Transaction Costs and Opportunity Gaps
Since 2022, Singapore retail investors have been able to use CPF Ordinary Account money to invest in 6-month MAS Treasury Bills through the CPF Investment Scheme (CPFIS). This opened a pathway for CPF members to potentially earn higher returns than the 2.5% OA floor rate — but the decision is more nuanced than simply comparing the headline T-Bill yield against 2.5%.
The key rules for CPF OA T-Bill investment: you must retain a minimum of S$20,000 in your OA before any CPFIS investments (this floor is non-negotiable — it protects your housing and insurance needs). Only amounts above S$20,000 can be invested. Applications are made through the three CPFIS agent banks (DBS, OCBC, UOB) during the T-Bill auction window. When the T-Bill matures, the principal and interest are returned to your CPF OA automatically.
The critical calculation most people miss: during the 6 months your money is in the T-Bill, it does not earn the 2.5% OA interest. This means the T-Bill must earn more than 2.5% just to break even. If the T-Bill cut-off yield is 3.0%, your gain over OA is only 0.5% annualised (3.0% − 2.5%). On a S$50,000 investment for 6 months, the extra return is only S$125. After accounting for the S$2.50 transaction fee per application and any bank charges, the net benefit can be surprisingly small.
Additionally, T-Bill allotment through CPFIS follows the same oversubscription rules as cash applications. If the auction is 1.8x oversubscribed, your S$50,000 application may receive only S$28,000 in allotment — with the unallocated S$22,000 sitting in your OA earning 2.5% as normal. The effective blended return on your total S$50,000 is lower than the T-Bill headline yield.
The CPF OA T-Bill Calculator takes your current OA balance, the S$20,000 retention, the T-Bill yield, estimated allotment ratio, and transaction costs. It computes: investable amount (OA minus S$20,000), estimated allotment, T-Bill return over 6 months, foregone OA interest on the invested portion, net gain over leaving money in OA, and the minimum T-Bill yield needed to make CPFIS investment worthwhile after all costs.
The Break-Even Yield — When CPF OA T-Bills Stop Making Sense
After transaction costs and the lost 2.5% OA interest, the T-Bill cut-off yield needs to be approximately 2.8% or higher for CPFIS T-Bill investment to deliver a meaningful net positive return. Below 2.8%, the effort, allotment risk, and lost OA interest make the exercise marginally profitable at best. When T-Bill yields drop below 2.5% (which happens when MAS eases monetary policy), investing CPF OA in T-Bills actually loses money compared to leaving it in OA. Always check current yields before applying.
Understanding Guaranteed Savings Plans in Singapore 2026 — Comparing Capital-Protected Endowment Products From NTUC Income, Singlife, Manulife and Great Eastern Against CPF SA Top-Ups at 4% Guaranteed
Guaranteed savings plans (also called capital-guaranteed plans or short-term endowments) are insurance products that promise to return at least 100% of your premiums plus a small guaranteed return at maturity — typically after 2 to 5 years. These are marketed as “safe alternatives to fixed deposits” and are extremely popular in Singapore, with products like NTUC Income Gro Capital Sure, Singlife Save Pro, and Great Eastern Smart Saver drawing billions in subscriptions.
The typical structure: you pay a single premium (minimum S$10,000 to S$20,000), the insurer invests it conservatively, and at maturity you receive your premium back plus a return split into guaranteed (1.5% to 2.5% p.a.) and non-guaranteed (projected additional 0.5% to 1.5% p.a.) components. Total projected return: 2.0% to 4.0% p.a. depending on the product, tenure, and prevailing rate environment.
The comparison that every Singaporean should make but few do: CPF Special Account voluntary top-ups earn a guaranteed 4.0% per annum with zero risk, government-backed, and with tax relief of up to S$8,000 (RSTU relief). A guaranteed savings plan offering 2.5% guaranteed + 1.0% non-guaranteed (3.5% total projected) is inferior to CPF SA on every metric: lower guaranteed return (2.5% vs 4.0%), non-guaranteed component adds uncertainty, no tax relief, surrender penalty if exited early, and insurer credit risk (vs government guarantee for CPF). The only advantage of guaranteed savings plans over CPF SA: liquidity — you can access the money at maturity, whereas CPF SA is locked until age 55 (subject to FRS/BRS withdrawal rules).
The Guaranteed Savings Plan Calculator takes the single premium, product tenure, guaranteed return rate, projected non-guaranteed bonus, and any early surrender penalty. It computes: guaranteed maturity value, projected total maturity value, annualised IRR (guaranteed and projected), and a side-by-side comparison against CPF SA top-up at 4% for the same amount and period — showing the guaranteed return gap and the liquidity premium you are paying for access to the funds.
The “Liquidity Premium” Question — Is Access to Your Money Worth 1.5% Lower Return?
The core trade-off: CPF SA pays 4.0% guaranteed but locks your money until at least age 55. Guaranteed savings plans pay 2.0-2.5% guaranteed but return your money in 2-5 years. The question every investor must answer: is the ability to access S$50,000 in 3 years worth S$2,250 in foregone interest (the difference between 4% and 2.5% on S$50,000 over 3 years)? For retirees who need the money soon, yes. For 30-40 year olds with 20+ years before CPF withdrawal, the SA top-up is almost always the better choice. Use the CPF Compounding Calculator to see the long-term power of 4% guaranteed compounding.
Understanding CPFIS Returns in Singapore 2026 — How CPF Investment Scheme Products Perform After Management Fees, Agent Sales Charges and the Opportunity Cost of Losing the 2.5% OA Floor Rate During the Investment Period
The CPF Investment Scheme (CPFIS) allows CPF members to invest OA funds (above S$20,000) and SA funds (above S$40,000) in approved products: unit trusts, investment-linked policies (ILPs), exchange-traded funds (ETFs), fixed deposits, government bonds, annuities, endowments, and gold. The scheme was designed to help members earn returns above the CPF floor rates.
The uncomfortable truth: most CPFIS investors underperform the CPF floor rates. According to CPF Board published data, the majority of CPFIS-OA portfolios earn less than 2.5% p.a. after fees, and most CPFIS-SA portfolios earn less than 4.0% p.a. The reasons are structural: CPFIS-approved unit trusts charge management fees of 1.0% to 2.5% per annum, agent sales charges of 1.5% to 5.0% upfront, and some ILPs have insurance charges on top. These fee layers consume a massive portion of gross returns.
Consider the math: if a CPFIS equity fund earns 7% gross return per annum, after a 1.5% management fee and a 3% upfront sales charge amortised over 5 years (0.6%/year), the net return is approximately 4.9%. That is barely above the 4.0% CPF SA rate — and the equity fund carries significant market risk that CPF SA does not. In a down year (−15%), the fund returns −16.5% after fees — while CPF SA still delivers its guaranteed 4.0%. Over 10 years, the CPFIS equity fund must outperform the market average just to match the risk-free CPF SA rate.
The only CPFIS products that consistently match or beat CPF rates are: T-Bills (when yields exceed 2.5-2.8%), SSBs (for longer-term OA parking), low-cost ETFs (like the Nikko AM STI ETF at 0.30% expense ratio — but with market risk), and fixed deposits (when FD rates exceed 2.5%). The CPFIS Returns Calculator helps evaluate any CPFIS product by stripping out all fee layers to show the true net return versus leaving money in CPF at the floor rate.
The CPFIS Returns Calculator takes the CPFIS product gross return (projected or historical), management fee, sales charge, any insurance charge (for ILPs), investment period, and the CPF floor rate (2.5% OA or 4.0% SA). It computes: gross return, total fee deductions, net return after all fees, CPF floor return for the same period, net gain or loss versus CPF floor, and the minimum gross return the product must achieve to match the CPF floor after fees.
How These 3 CPF Investment Calculators Work — OA T-Bill Net Gain Formula, Savings Plan IRR Comparison and CPFIS Fee-Adjusted Return for Singapore 2026
The CPF OA T-Bill Calculator computes: investable OA = current OA − S$20,000 retention. Estimated allotment = investable × (1 ÷ oversubscription ratio). T-Bill return = allotment × yield × 0.5 (6 months). Foregone OA interest = allotment × 2.5% × 0.5. Net gain = T-Bill return − foregone interest − transaction fee. Break-even yield = 2.5% + (transaction fee × 2 ÷ allotment).
The Savings Plan Calculator takes single premium, guaranteed return, non-guaranteed bonus, and tenure. It computes: guaranteed maturity = premium × (1 + guaranteed rate)^tenure. Projected maturity = premium × (1 + total rate)^tenure. Guaranteed IRR and projected IRR. CPF SA comparison = premium × (1.04)^tenure. Gap = CPF SA value − guaranteed savings plan value.
The CPFIS Returns Calculator computes: net annual return = gross return − management fee − amortised sales charge − insurance charge. Net value after N years = investment × (1 + net return)^N. CPF floor value = investment × (1 + floor rate)^N. Gain/loss vs CPF = net value − CPF floor value. Minimum gross return to match CPF = floor rate + total annual fees.
3 Real Singapore CPF Investment Examples — S$50,000 OA T-Bill Netting Only S$88, Savings Plan at 2.5% Losing S$3,800 vs CPF SA and CPFIS Unit Trust Needing 5.5% Gross Just to Match SA 4%
Example 1: S$50,000 CPF OA T-Bill Application at 3.0% — After 55% Allotment and Costs, Net Gain Is Only S$88 Over 6 Months
Mr Lim has S$70,000 in his CPF OA. He applies for S$50,000 in the latest 6-month T-Bill auction via CPFIS at a 3.0% cut-off yield. The auction is 1.8x oversubscribed.
The headline 3.0% T-Bill yield sounds great — but after only 55% allotment, foregone OA interest, and transaction costs, Mr Lim nets just S$66 over 6 months on S$27,500 deployed. The remaining S$22,500 sits in OA at 2.5% regardless. The total blended return on his S$50,000 is only 2.59% annualised — barely above the 2.5% OA floor. The CPF OA T-Bill trade only makes sense when yields are 3.5%+ AND allotment is above 70%. Use the calculator with current rates before applying.
Example 2: S$50,000 Guaranteed Savings Plan at 2.5% vs CPF SA Top-Up at 4.0% — SA Wins by S$3,810 Over 5 Years
Mrs Tan, 35, has S$50,000 in excess cash. She compares two options: a 5-year guaranteed savings plan (2.5% guaranteed, 0.8% projected bonus) vs a CPF SA voluntary top-up (4.0% guaranteed, S$8,000 tax relief).
The CPF SA top-up delivers S$4,263 more in guaranteed returns over 5 years — plus S$1,200 in tax relief (if Mrs Tan is in the 15% bracket and has not exhausted the S$8,000 RSTU cap). The savings plan's only advantage is liquidity: she gets the money back at year 5. The SA top-up is locked until at least age 55 (20 years away for Mrs Tan). If she does not need the money before age 55, the SA top-up is the clear winner. If she might need it in 5 years, the guaranteed savings plan preserves flexibility at a S$3,200-S$5,463 cost. Use the Savings Plan Calculator to compare any product against CPF SA.
Example 3: CPFIS Unit Trust — 7% Gross Return, 1.5% Management Fee, 3% Sales Charge = 4.3% Net, Barely Beating SA 4.0%
Mr Ahmad invests S$40,000 from his CPF SA into a CPFIS-approved equity unit trust for 10 years. The fund has a gross return of 7% p.a. (projected), 1.5% annual management fee, and 3% upfront sales charge.
The CPFIS unit trust needs to achieve 5.8% gross return just to match the risk-free CPF SA 4.0%. At 7% gross (a good outcome), the net return of 5.2% beats SA by only 1.2% — while carrying full equity market risk. If the fund returns only 5% gross (a mediocre but realistic outcome), the net 3.2% loses to CPF SA. And in a down year, the fund could return −16.5% after fees while SA still earns 4.0%. This is why CPF Board data shows most CPFIS investors underperform: the fee hurdle is simply too high. Only low-cost ETFs (0.3% fees) or T-Bills make mathematical sense within CPFIS. Use the CPFIS Returns Calculator to evaluate any product.
3 Expert Tips for CPF OA T-Bills, Guaranteed Savings Plans and CPFIS Investing in Singapore
Only Invest CPF OA in T-Bills When Yields Exceed 3.0% — Below That the Net Gain After Allotment Is Negligible
At 3.0% T-Bill yield with 55% allotment, your net gain over OA 2.5% is approximately S$66 on a S$50,000 application — the equivalent of earning S$11 per month for the effort. At 3.5%, the same scenario nets approximately S$200 — worth the effort. Below 2.8%, you are better off leaving money in OA and saving yourself the application hassle. Check the MAS website for the latest T-Bill results before each auction application.
Max Out CPF SA Top-Ups Before Buying Any Guaranteed Savings Plan — 4.0% Guaranteed Beats Everything Risk-Free
CPF SA top-ups earn 4.0% guaranteed with zero risk and up to S$8,000 in RSTU tax relief. No guaranteed savings plan in Singapore offers a guaranteed return above 3.0% (most are 2.0-2.5%). The only reason to choose a savings plan over SA: you need the money before age 55. If you are under 45 and do not need the funds within 10+ years, the SA top-up is mathematically superior in every scenario. Top up the full S$8,000 RSTU allowance first, then consider savings plans for any remaining excess cash.
Avoid CPFIS Unit Trusts With More Than 1.0% Annual Fees — The Fee Hurdle Makes Beating CPF Floor Rates Nearly Impossible
Every 1% in fees requires approximately 1% higher gross return just to break even against CPF rates. A fund with 2.0% annual fees (management + wrap charges) needs 6.5% gross return annually to match CPF SA 4.0% — a return that most balanced funds do not consistently achieve. If you insist on CPFIS investing, choose the lowest-cost options: STI ETF (0.30% expense ratio), T-Bills (no annual fee), or SSBs. Avoid ILPs (insurance-linked products) entirely — their combined insurance and investment charges often exceed 3.0% annually.
16 Frequently Asked Questions About CPF OA T-Bills, Guaranteed Savings Plans and CPFIS Returns in Singapore
Can I use CPF OA to buy T-Bills?
Yes. Since 2022, CPF OA funds above S$20,000 can be used to invest in 6-month MAS T-Bills through the CPFIS agent banks (DBS, OCBC, UOB). Applications are made during the T-Bill auction window. At maturity, proceeds are returned to your CPF OA automatically.
What is the S$20,000 OA retention rule?
You must retain a minimum of S$20,000 in your CPF OA before making any CPFIS investments. This floor protects funds needed for housing and insurance. Only amounts above S$20,000 are investable. The retention amount is non-negotiable and applies to all CPFIS products including T-Bills.
Does my CPF OA earn interest while invested in T-Bills?
No. During the 6-month T-Bill holding period, the invested portion does not earn the 2.5% OA interest. This means the T-Bill must yield more than 2.5% for the investment to be profitable. The opportunity cost of lost OA interest must be factored into any CPFIS T-Bill decision.
What is a guaranteed savings plan?
A guaranteed savings plan (or capital-guaranteed plan) is an insurance product that promises to return at least 100% of your premiums plus a guaranteed interest rate at maturity. They typically run 2-5 years and offer guaranteed returns of 1.5-2.5% per annum plus a non-guaranteed bonus projection. They are offered by major insurers like NTUC Income, Singlife, and Great Eastern.
Is a guaranteed savings plan better than CPF SA top-up?
For most Singaporeans under 45, no. CPF SA top-ups earn a guaranteed 4.0% per annum with zero risk, which exceeds the guaranteed return of virtually all savings plans (2.0-2.5%). The only advantage of savings plans is liquidity: you can access the money at maturity, while CPF SA is locked until at least age 55.
What is the RSTU tax relief for CPF SA top-ups?
The Retirement Sum Topping-Up scheme provides tax relief of up to S$8,000 per year for voluntary contributions to your own CPF SA or Retirement Account. At a 15% marginal tax rate, S$8,000 in top-ups saves S$1,200 in income tax. This tax benefit is not available for guaranteed savings plans or other investment products.
What is the CPFIS?
The CPF Investment Scheme allows CPF members to invest OA funds (above S$20,000) and SA funds (above S$40,000) in approved products including unit trusts, ETFs, ILPs, fixed deposits, government bonds, annuities, endowments, and gold. The scheme is designed to help members potentially earn returns above the CPF floor rates.
Do most CPFIS investors beat CPF rates?
No. According to CPF Board published data, the majority of CPFIS portfolios underperform the CPF floor rates after fees. High management fees (1.0-2.5% per annum) and upfront sales charges (1.5-5.0%) consume a large portion of gross returns, making it very difficult to consistently outperform the risk-free CPF rates.
What CPFIS products have the lowest fees?
The lowest-cost CPFIS options are: T-Bills (no annual management fee, S$2.50 transaction fee), SSBs (no fees), STI ETF (approximately 0.30% expense ratio), and CPFIS fixed deposits (no management fees). Avoid ILPs and high-cost unit trusts with fees above 1.5% per annum.
What is the minimum gross return needed to beat CPF SA via CPFIS?
For a CPFIS product with 1.5% annual fees and 3% upfront sales charge, the minimum gross return to match CPF SA 4.0% is approximately 5.8% per annum over 10 years. Only consistently strong equity performance achieves this, and it comes with significant market risk that CPF SA does not carry.
Can I use CPF SA to buy T-Bills?
CPFIS-SA allows investment in approved products including T-Bills, but you must retain S$40,000 in your SA before investing. Given that SA already earns 4.0% guaranteed, investing SA funds in T-Bills at 3.0% would actually lose money. CPFIS-SA T-Bill investment only makes sense when T-Bill yields significantly exceed 4.0%, which is rare.
What happens when my CPFIS T-Bill matures?
When the T-Bill matures, the full face value (including the discount return) is automatically credited back to your CPF OA through the agent bank. No action is required from you. The returned funds resume earning the 2.5% OA interest immediately.
Are CPFIS returns taxable?
No. Returns from CPFIS investments (including T-Bill interest, unit trust gains, and ETF dividends) are not taxable for individuals in Singapore as they remain within the CPF system. Capital gains are not taxed in Singapore regardless. CPF withdrawals at age 55 or later are also tax-free.
Can I surrender a guaranteed savings plan early?
Yes, but with a significant penalty. Early surrender in the first 1-2 years typically returns only 70-90% of premiums paid. The surrender value increases over the policy tenure and reaches 100% of premiums (break-even) only near maturity. Always check the surrender value schedule before buying and ensure you can commit to the full tenure.
What is the S$40,000 SA retention for CPFIS-SA?
You must retain a minimum of S$40,000 in your CPF SA before making any CPFIS-SA investments. This retention is higher than the S$20,000 OA retention because SA funds are intended for retirement and must be protected. Only amounts above S$40,000 are investable under CPFIS-SA.
Should I invest CPF at all or just leave it earning the floor rates?
For most people, leaving CPF in OA at 2.5% and SA at 4.0% is the optimal strategy. The guaranteed, risk-free returns are difficult to beat after CPFIS fees and market risk. The exceptions are: CPF OA T-Bills when yields exceed 3.0%, and very low-cost ETFs for those with a long time horizon and high risk tolerance. If in doubt, the floor rates are excellent risk-adjusted returns.
Related CPF, Investment and Wealth Calculators for Singapore
Legal Disclaimer and Editorial Transparency
CPF OA interest rate of 2.5% and SA interest rate of 4.0% per CPF Board published rates. CPFIS rules, S$20,000 OA retention, and S$40,000 SA retention per CPF Board CPFIS guidelines. T-Bill yields and auction mechanics per MAS published auction results. RSTU tax relief of S$8,000 per IRAS published tax relief guidelines. Guaranteed savings plan returns are illustrative based on published benefit illustrations from NTUC Income, Singlife, and Great Eastern as of 2026; actual guaranteed and non-guaranteed returns depend on the specific product and insurer. CPFIS performance data per CPF Board published annual reports. Unit trust fees and sales charges per published fund prospectuses. Past returns are not indicative of future performance. This guide is for informational and educational purposes only. It does not constitute financial, investment, or tax advice. Consult a licensed financial advisor before making CPF investment decisions. Published by MAFHH INTERNATIONAL LTD. Editorially independent. We do not collect any data you enter into our calculators.
