Singapore Money Market Fund vs T-Bill Comparison 2026 — Head-to-Head Net Yield, 3 Reinvestment Scenarios, Expected-Value Analysis, Liquidity Event Probability & Clear Decision Verdict for StashAway Simple+, Syfe Cash+, Endowus vs 6-Month MAS T-Bill

Singapore MMF vs T-Bill — core difference: liquidity: MMF: daily (T+0 or T+1 redemption, any business day, no penalty); T-Bill: locked for full tenor (6 months or 1 year); retail investors cannot exit T-Bills early without losing all interest; yield type: MMF: variable — changes daily with market; what you see today may be different in 2 weeks; T-Bill: fixed at the auction cut-off yield; guaranteed for the full tenor from the date of settlement; return when exiting before maturity: MMF: full accrued return to date of redemption (daily accrual); T-Bill: zero interest if exited before maturity (cannot exit for retail); government backing: MMF: NOT direct government; it's a unit trust that holds government securities — you have indirect exposure to SGS; T-Bill: DIRECT Singapore government obligation (AAA-rated); capital guarantee: MMF: not formally guaranteed (though in practice NAV is extremely stable); T-Bill: guaranteed at face value at maturity; expense ratio: MMF: annual expense ratio (0.15%–0.40%) reduces net yield; T-Bill: no ongoing fee (only S$2 application fee); minimum investment: MMF: as low as S$1 (StashAway, Syfe); T-Bill: S$1,000 minimum; application complexity: MMF: simple — open account, transfer money, earn daily; T-Bill: auction schedule, application window, CDP account required; in summary: MMFs are better when you might need the money within 6 months or CMF net yield ≥ T-Bill effective yield; T-Bills are better when yields are meaningfully higher and you're certain you won't need the money for 6 months.

Fair comparison: Singapore MMF net yield vs T-Bill yield 2026: the issue: T-Bills are quoted as bank discount yields (using 360-day year) while MMF yields use simple annualised rates (365-day year); comparing 3.08% T-Bill to 3.08% MMF is NOT apples-to-apples; step 1 — convert T-Bill to effective simple yield: T-Bill bank discount yield: 3.08% cut-off; days: 182; price per S$1 face: 1 − (3.08%/100 × 182/360) = 0.98443; effective simple yield (365-day): (1/0.98443 − 1) × (365/182) = 3.173%; the T-Bill's TRUE comparable rate is 3.173%, not 3.08%; step 2 — net the MMF yield: MMF gross: 3.60% − expense 0.20% = 3.40% net; step 3 — compare: T-Bill: 3.173% effective; MMF: 3.40% net; MMF wins by 0.227%; this calculator does this conversion automatically so you always compare on the same 365-day simple interest basis; why the conversion matters: at high investment amounts: on S$100,000 for 6 months: 0.227% yield difference = S$113 in 6 months; small difference, but real; at near-parity yields: the difference between quoting in 360-day vs 365-day terms can make a T-Bill look more competitive than it is; always convert T-Bill to effective simple yield before comparing to MMF net yield; this calculator handles the conversion transparently.

Singapore T-Bill early exit — the hard reality 2026: retail investors CANNOT sell Singapore T-Bills on the secondary market. The only exit is: hold to maturity: receive full face value (principal) + zero coupon (T-Bills pay at maturity via discount). There is no other option for retail investors; what “early exit” means in practice: your S$1,000 face value T-Bill pays S$1,015 at 6-month maturity; before maturity: your CDP account shows the T-Bill holding; you cannot sell it, you cannot redeem it, you cannot pledge it easily for a loan (though some private banks may accept T-Bills as collateral for securities-backed lending; not standard for retail); the only “emergency exit” options: 1) margin/securities lending: a private bank or brokerage might lend against your T-Bill position; interest rates typically higher than T-Bill yield, so this costs more than just keeping cash in a CMF; 2) wait it out: if you need funds urgently, you'd need to find money from elsewhere (credit card, personal loan, emergency fund); this is why the early-exit probability in this calculator matters so much; the moral of this story: never put money in a T-Bill that you might need in the next 6 months; maintain a separate emergency fund (CMF, HISA, or savings account) that is always accessible; the “liquid reserve” vs “T-Bill allocation” split is the fundamental Singapore cash management structure to avoid this problem; if you're unsure whether you might need the funds: choose the CMF.

Expected value formula for Singapore MMF vs T-Bill decision 2026: this calculator uses a simplified expected value (EV) approach to account for liquidity risk: definitions: liquidity probability (p) = probability that you'll need to exit before T-Bill maturity; (1 − p) = probability of holding T-Bill to full maturity; T-Bill early exit return = S$0 (zero interest, only principal returned); T-Bill full-term return = principal × effective yield × (days/365); MMF return = principal × net yield × (days/365) (assumed always available); formula: expected T-Bill value = (T-Bill full return × (1 − p)) + (S$0 × p) = T-Bill full return × (1 − p); expected MMF value = MMF return × 1 (always accessible, so no adjustment); decision: if expected T-Bill value > expected MMF value → T-Bill wins; else → MMF wins; example: S$50,000, T-Bill full return S$790, MMF return S$710, liq. prob = 20%; expected T-Bill = S$790 × 80% = S$632; expected MMF = S$710; verdict: MMF wins (S$710 > S$632) even though T-Bill has higher raw yield; limitations of this model: it's a simplification — in reality: MMF yield is variable (the 3-scenario table adds this nuance); T-Bill early exit might not be all-or-nothing (some brokers may help); correlation between market conditions and your liquidity need (rate rises often coincide with financial stress periods); these simplifications make the model easy to use and directionally correct for decision-making purposes; users should use the scenario table alongside the EV result for a fuller picture.

Singapore MMF clearly beats T-Bills in these situations 2026: situation 1 — MMF net yield ≥ T-Bill effective yield: if StashAway Simple+ at 3.60% gross (0.20% expense = 3.40% net) vs T-Bill at 3.08% cut-off (3.17% effective): MMF wins by 0.23% yield AND provides daily liquidity; in this case, choosing T-Bill gives you less money AND less liquidity; situation 2 — holding period shorter than T-Bill tenor: if you need funds in 3 months, you cannot use a 6-month T-Bill; 3-month T-Bills exist but are less commonly used by Singapore retail investors; the CMF is the only option for 1–5 month investment horizons with competitive yield; situation 3 — meaningful early-exit probability: if your early-exit probability is 30%+: even if T-Bill effective yield is 0.3% higher, the expected value often swings to CMF; example: T-Bill full return S$500, CMF return S$470, liq. prob. 35%: expected T-Bill = S$500 × 65% = S$325 < CMF S$470; situation 4 — uncertain rate environment with upside potential: if Singapore rates are rising: CMF captures rate increases immediately; T-Bill locks you in at today’s rate; if rates rise by 0.50% in month 3 of your T-Bill: you can't capture it; CMF would capture it within weeks; situation 5 — simplicity preference: MMF requires zero management: no auction monitoring, no CDP account management, no cut-off yield research; if you value your time at more than S$200/year (often the yield advantage of T-Bills): CMF simplicity may be worth the small yield sacrifice.

Singapore T-Bills clearly beat Money Market Funds in these situations 2026: situation 1 — T-Bill effective yield significantly exceeds MMF net yield (>0.30%): this occurs when: CMF expense ratios are high relative to gross yield; T-Bill cut-off yields spike due to strong auction demand / rate events; in these moments, locking in the T-Bill yield is clearly correct; situation 2 — you're confident about 6-month liquidity (very low early-exit probability): if you have: S$30,000 in a separate emergency fund fully covering 3–6 months of expenses; a stable income with no expected large expenses for 6 months; no planned major purchases (car, renovation, overseas education fees) in the next 6 months; then locking in the T-Bill at 0.3%+ higher effective yield is the optimal choice; situation 3 — rates expected to fall significantly: if you believe Singapore rates will drop by 0.5%+ in the next 3 months: locking in the T-Bill at current rates protects your return; CMF yield would fall with the market; example: T-Bill locked at 3.17% effective for 6 months; if CMF yield falls to 2.50% in month 3: T-Bill wins by more than just 0.3%; you've protected against the full rate decline; situation 4 — CPF-OA investment via CPFIS: if using CPF-OA funds (which are restricted and can only be deployed in CPFIS-approved instruments): T-Bills are available via CPFIS; most CMFs are NOT available via CPFIS; so for CPF money: T-Bill is typically the only viable alternative to remaining in CPF-OA; situation 5 — capital certainty preference: for investors who want absolute certainty of return of principal (not just practical certainty that CMF NAV stays at 1.00): T-Bills are direct government obligations; some investors prefer this structure over unit trusts for psychological peace of mind.

CPF-OA context for MMF vs T-Bill decision Singapore 2026: this calculator is primarily designed for regular cash savings, not CPF-OA money. The CPF context changes several factors: for regular cash savings: both CMFs and T-Bills are available; the comparison is symmetric; choose based on yield gap and liquidity need; for CPF-OA money via CPFIS: most CMFs are NOT CPFIS-approved (StashAway, Syfe are NOT CPFIS-registered platforms as of knowledge cutoff); T-Bills ARE available via CPFIS through DBS, OCBC, or UOB; some money market unit trusts may be CPFIS-eligible — check cpf.gov.sg for the current approved funds list; the effective CPF-OA decision is usually: CPF-OA (2.5% guaranteed) vs T-Bill via CPFIS; our dedicated CPFOA vs T-Bill Calculator (P184) handles this exact comparison with the correct break-even calculation; for CPF money: the break-even T-Bill yield to beat CPF-OA is approximately 2.71% (accounts for 1 month of forfeited CPF-OA interest during the CPFIS transition); if T-Bill effective yield > 2.71%: investing CPF-OA via CPFIS T-Bill makes sense; if T-Bill effective yield < 2.71%: keep in CPF-OA at 2.5%; for cash savings: this MMF vs T-Bill calculator is the right tool; the comparison is cleaner because there's no CPF-OA opportunity cost involved.

Using this calculator for 1-year T-Bills (BY-series) in Singapore 2026: yes — the calculator supports 1-year T-Bills (select “1-Year T-Bill (~364 days)” in the T-Bill tenor dropdown): 1-year T-Bill specifics: tenor: approximately 364 days; issued monthly by MAS (BY-series); typically offers slightly different yields than the 6-month T-Bill; in some yield curve environments, 1-year may yield more or less than 6-month; check the latest yield at mas.gov.sg/bonds-and-bills; calculation adjustments: the price formula becomes: Price = 1 − (yield% / 100) × (364/360); effective simple yield (365-day) = (face−price)/price × (365/364); for the 1-year T-Bill at 3.20% cut-off: price per S$1 face = 0.96764; effective yield = (0.03236/0.96764) × (365/364) = 3.345% p.a.; holding period consideration: for a 1-year T-Bill, you'd typically set your holding period to 364 days; if your holding period is shorter than 364 days: T-Bill early exit = S$0 interest; CMF wins automatically; if your holding period equals or exceeds 364 days: same analysis as for 6-month T-Bills; typical comparison: at similar yields, 1-year T-Bills lock up capital for 12 months; the liquidity probability has more time to materialise; most Singapore retail investors prefer the 6-month T-Bill for its shorter lock-in and faster re-investment cycle; use 1-year T-Bills when: the yield curve is inverted (1-year yields less than 6-month — less common); or when the 1-year yield is significantly higher than 6-month AND you have very high confidence about 12-month liquidity.

Singapore CMF yield behaviour relative to T-Bill rate changes 2026: CMF yields lag T-Bill rate changes by 4–8 weeks on average: why the lag exists: Singapore CMFs hold a portfolio of instruments with different maturity dates (typically averaging 30–90 days); when T-Bill cut-off yields change, the CMF portfolio doesn't immediately reflect this; only as existing holdings mature and are reinvested at new rates does the CMF yield change; the shorter the average portfolio duration, the faster the CMF adjusts; rate rise scenario (example): T-Bill cut-off rises from 3.08% to 3.50% this auction: CMF yield today: 3.40% net; CMF yield in 3 weeks: starts rising as portfolio holdings roll over at higher rates; CMF yield in 6–8 weeks: may reach 3.70%+ net if new T-Bill rates sustain; implication: in a rising rate environment, CMF is better than T-Bill because: you capture rate increases through the portfolio rollover; T-Bill locks you at today’s (lower) rate for 6 months; rate fall scenario (example): T-Bill cut-off falls from 3.17% to 2.80%: CMF yield today: 3.40% net; CMF yield in 3–4 weeks: starts declining; CMF yield in 6–8 weeks: may reach 2.60%–2.80% net; implication: in a falling rate environment, locking a T-Bill at current rates is better; you're protected from the full rate decline for 6 months; practical monitoring: compare CMF 7-day yield trend weekly; if two consecutive weeks show falling CMF yield: likely falling rate environment → shift allocation to T-Bills; if two consecutive T-Bill cut-offs are higher than previous: rising rate environment → favour CMF; this calculator's scenario analysis (MMF yield falls 25%/50%) models the falling rate scenario explicitly.

Singapore CMF capital loss risk 2026: theoretical possibility: yes, in extreme scenarios, a money market fund NAV could fall below 1.00 (“breaking the buck”); practical experience: no Singapore SGD money market fund has ever broken the buck to date; the regulatory environment and portfolio requirements make this extremely unlikely; why Singapore CMFs are practically safe: MAS requires strict credit quality standards for authorised CMFs; underlying holdings are primarily: Singapore Government Securities (AAA-rated); bank deposits at MAS-licensed banks; highly-rated commercial paper with short maturities; asset segregation: CMF assets are held by an independent custodian (separate from fund manager balance sheet); portfolio duration is short (typically under 90 days); short duration means rapid NAV adjustment but also rapid capital recovery if disruption occurs; potential risk scenarios (extremely low probability): a major Singapore bank fails holding a large portion of CMF deposits: the MAS regulation and bank capital requirements make a Singapore D-SIB (DomesticSystemically Important Bank) failure extremely unlikely; a global credit freeze affecting commercial paper: possible in a 2008-type scenario; MAS would likely intervene with emergency liquidity facilities; historical comparison: US money market funds: the 2008 Reserve Primary Fund broke the buck (fell to S$0.97 per unit) because it held S$785 million in Lehman Brothers commercial paper; Singapore SGD CMFs hold no such concentrated single-issuer high-risk debt; the practical risk for Singapore CMF investors: capital risk is de minimis relative to the yield benefit over bank savings accounts; the main risk is yield variability (return risk), not capital loss risk.

S$100,000 T-Bill vs split allocation strategy Singapore 2026: pure T-Bill strategy (all S$100,000 in 6-month T-Bill): advantages: maximum guaranteed yield at current rate; simplest to manage (one application every 6 months); government obligation security; disadvantages: zero liquidity for 6 months; if you need any amount before maturity: zero interest on early exit; if rates rise during the 6 months: can't capture upside; all-or-nothing: can't partially redeem; split allocation (S$70,000 T-Bill + S$30,000 CMF) example at indicative 2026 rates: T-Bill portion: S$70,000 × 3.17% effective × 182/365 = S$1,105.37; CMF portion: S$30,000 × 3.40% net × 182/365 = S$508.60; total: S$1,613.97 over 6 months; pure T-Bill (S$100,000): S$100,000 × 3.17% × 182/365 = S$1,579.10; split outperforms by S$34.87 (because CMF yield is higher in this example); and you have S$30,000 immediately accessible at all times; pure CMF (S$100,000 at 3.40% net): S$1,700.00 over 6 months; pure CMF wins on yield in this scenario (3.40% > 3.17%); optimal split depends on: actual yield gap between CMF and T-Bill; your liquidity need; rate direction outlook; practical recommendation for S$100,000 in Singapore 2026: run this calculator first to find the yield verdict; if CMF wins: 70%+ in CMF, 30% optional T-Bill for guaranteed portion; if T-Bill wins: 70% T-Bill, 30% CMF for liquidity buffer; if near tie: 50/50 split; the exact split should match your personal liquidity need from the CMF portion.

Optimal monitoring frequency for Singapore CMF vs T-Bill decision 2026: recommended review cadence: check after every T-Bill auction result (every 2 weeks for 6-month T-Bills); this takes 5 minutes: check MAS website for latest cut-off yield; check your CMF app for 7-day yield; re-run this calculator; act or hold; when to actually switch: switching from CMF to T-Bill: T-Bill effective yield consistently exceeds CMF net by 0.20%+ for 2+ consecutive auctions; your personal circumstances make 6-month lock-in comfortable; switching from T-Bill to CMF: when T-Bill matures, run the current calculator before re-applying; if CMF now yields more: put proceeds into CMF instead of re-applying for T-Bill; mid-cycle switching: you can't exit a T-Bill mid-cycle; but you can stop re-investing T-Bill proceeds into new T-Bills when they mature; the effective switch happens at each maturity date; over-trading trap: don't switch back and forth every week chasing 0.05% yield differences; the switching costs (admin time, T-Bill application fortnightly cycle, potential for missing an auction window) outweigh tiny yield differences; general rule: only switch when the yield difference exceeds 0.20% AND your liquidity situation justifies it; maintaining a simple log (Excel or Numbers): date | T-Bill yield | CMF yield | gap | decision | notes; keeps you disciplined and helps you track how often the decision changes and in which direction.

Tax treatment comparison: Singapore MMF vs T-Bill income 2026: for Singapore individual investors: both T-Bill discount income and CMF distributions are tax-exempt; you do not need to declare either in your IRAS income tax return; this applies equally to Singapore citizens, PRs, and foreigners who are Singapore tax residents; detailed breakdown: T-Bill discount (the difference between what you pay and the face value received at maturity): tax-exempt for individual investors under Singapore law; all Singapore Government Securities income is exempt; CMF distributions and unit price gains: CMF income is generally tax-exempt for Singapore individual investors; MAS-authorised CMFs investing in Singapore instruments have historically been tax-exempt; capital gains: Singapore has no capital gains tax; any unit price appreciation in a CMF is not taxable; any excess over face value if reselling a bond is not taxable for individuals; for companies: both T-Bill and CMF income may be taxable as part of business income; consult a corporate tax adviser; for foreigners: Singapore tax residents: same treatment as citizens/PRs; non-Singapore-resident foreigners investing from overseas: may have tax obligations in their home country (home country's worldwide income tax rules may apply); double-taxation agreement between Singapore and home country may reduce or eliminate this; for US persons (FATCA reporting): CMFs and T-Bills held by US citizens/green card holders in Singapore accounts are subject to IRS reporting requirements (FATCA); US persons should consult a tax advisor experienced with cross-border Singapore/US situations; practical takeaway: for Singapore-resident individual investors, the tax treatment of MMF and T-Bill income is identical (both exempt) — this is NOT a differentiating factor in the decision.

Safety comparison: Singapore CMF vs T-Bill 2026 — the nuanced answer: T-Bill is technically safer in these ways: direct government obligation: T-Bills are issued by the Singapore government (AAA-rated); you are a direct creditor of the Singapore government; the only credit risk is Singapore sovereign default — considered essentially impossible; capital certainty: at maturity, T-Bill returns exactly the promised amount; there is zero uncertainty about the amount you receive; no counterparty risk: between you and the T-Bill, there is only MAS; no fund manager, no custodian, no unit trust structure; CMF is practically safe but has these theoretical risks: not direct government: you hold units in a fund that holds government instruments; your counterparties include: the fund manager (Fullerton, StashAway, LionGlobal etc.); the fund custodian (HSBC, Citibank etc.); MAS oversight makes these risks minimal but non-zero; NAV can theoretically deviate from S$1.00: (never happened for Singapore SGD CMFs but theoretically possible); not SDIC-backed: unlike bank deposits, CMF units have no deposit insurance; the practical answer for Singapore retail investors: for amounts under S$200,000 in a Singapore CMF from a reputable MAS-regulated provider: the practical safety is indistinguishable from a T-Bill; the regulatory framework, custodial structure, and portfolio requirements make capital loss in a Singapore SGD CMF essentially negligible as a real-world risk; the safety difference is academic for most practical purposes; where safety distinction matters: for very large amounts (S$1M+): T-Bills eliminate custodial and fund-manager risk completely; for investors who cannot afford any capital uncertainty (e.g., money earmarked for a legal obligation): T-Bills give certainty that CMFs don't technically guarantee.

Historical and prospective analysis: can Singapore CMFs beat T-Bills for a full year? 2026 context: during different market environments: rate-rising periods (2022–2023): T-Bill cut-off yields rose dramatically from near-zero to 4%+; CMFs lagged initially (portfolio turnover took 6–8 weeks to reflect new higher rates); for the first 1–2 months of rate hikes: T-Bills would have won; after CMF yields caught up: CMFs and T-Bills were neck-and-neck; at the peak: some CMFs grossed 4.2%–4.5% while T-Bills cut at 3.8%–4.0%, meaning CMFs actually won on gross yield; expense ratios (0.20%–0.30%) brought CMF net yields to approximately 3.9%–4.2% vs T-Bill effective ~3.85%–4.10%; rate-stable periods (late 2024–2026): CMFs and T-Bills have been very competitive; the yield gap varies by 0.1%–0.3% depending on the auction and CMF portfolio mix; some months CMF wins, some months T-Bill wins; full-year performance (2024–2025 indicative): over a 12-month period, a well-managed CMF with 0.20% expense ratio earned approximately 3.3%–3.8% net; T-Bills (if rolled twice for 2 × 6 month periods at prevailing rates) earned approximately 3.2%–3.5% effective; outcome: CMFs slightly outperformed T-Bills over 12 months in 2024–2025 at these indicative figures, primarily because CMF gross yields moved with or slightly above T-Bill cut-off yields; but this is not guaranteed for 2026; the most likely outcome: CMFs and T-Bills will remain within 0.3% of each other for most of 2026; the decision will depend on current rates at the time you decide.

What to do with Singapore T-Bill maturity proceeds 2026: the maturity decision process: step 1 — when does the T-Bill mature? You'll receive the face value (e.g., S$10,000) in your bank account on the maturity date (usually a Monday or Tuesday); step 2 — immediately run this calculator with: current CMF net yield (check on maturity day); next T-Bill cut-off estimate (check the latest auction result on mas.gov.sg); step 3 — apply the verdict; if CMF wins: transfer T-Bill proceeds to your CMF on maturity day; start earning daily from the next business day; if T-Bill wins: submit non-competitive bid for the next 6-month T-Bill auction (check MAS for the upcoming auction schedule); if T-Bill application window is open: apply immediately; if application window is closed or hasn't opened yet: park in CMF temporarily until next T-Bill window opens; the CMF gap period: between T-Bill maturity and next T-Bill settlement is approximately 2 weeks (from maturity to next T-Bill settlement); placing proceeds in CMF during this 2-week gap: earns S$100,000 × 3.40% net × 14/365 ≈ S$130 extra over the 2 weeks; this is the “T-Bill buffer” strategy covered in our P182 CMF Calculator; if you roll T-Bills continuously for 12 months (two 6-month T-Bills), using CMF for the 2-week gap twice: earns an extra ≈S$260 on S$100,000/year; a worthwhile addition to your T-Bill strategy if you have a T+0 CMF (Endowus Cash Smart or Fullerton same-day redemption); auto-renewal: never allow your bank to auto-renew your T-Bill at a potentially lower promotional rate; always actively decide on maturity day what to do next.