Money Market Fund vs Bank Deposit: Which Wins?
Complete comparison of Indonesian money market funds vs bank deposits: after-tax returns, liquidity, safety, and simulation with IDR 10M, 50M, 100M over 1 year.
In brief
Complete comparison of Indonesian money market funds vs bank deposits: after-tax returns, liquidity, safety, and simulation with IDR 10M, 50M, 100M over 1 year.
Sources and corrections policy (Indonesian)
Note: This article discusses Indonesian financial products. Money market funds (reksa dana pasar uang) and deposits (deposito) are regulated by OJK (Financial Services Authority) and Bank Indonesia respectively. Tax treatment, returns, and guarantee limits are specific to Indonesia.
Money Market Fund vs Bank Deposit in Indonesia: Complete Comparison
Money market funds (MMF) and bank deposits are two instruments frequently compared because of similar characteristics: low-to-moderate returns, low risk, and suitable for short-term goals.
But which is better?
Spoiler: There’s no universally “better” one. There’s only the one more suitable for your situation. This article will help you choose by comparing both instruments across multiple dimensions — including concrete return simulations in Rupiah.
Quick Comparison Table
| Aspect | Money Market Fund (MMF) | Bank Deposit |
|---|---|---|
| Gross return | 4–5.5%/year | 3.5–5%/year |
| Tax | 0% (tax-free) | 20% final income tax |
| Net return | 4–5.5%/year | 2.8–4%/year |
| Liquidity | T+1 to T+7 | Locked until maturity |
| Early withdrawal penalty | None | Interest forfeited/deducted |
| Minimum | IDR 10,000 | IDR 1–10 million |
| Guarantee | Not guaranteed by LPS | Guaranteed by LPS (max IDR 2 billion) |
| Risk | Very low | Very low |
| Best for | Emergency fund, temporary parking | Savings goal, spending discipline |
Key insight: With the same gross return, MMF generates 20–25% more after tax.
Part 1: What Is a Money Market Fund?
A money market fund is a type of mutual fund where the entire portfolio is placed in money market instruments — debt instruments maturing in less than 1 year.
1.1 MMF Portfolio Contents
| Instrument | Description |
|---|---|
| Bank deposits | Placed at various banks |
| Bank Indonesia Certificates (SBI) | Short-term BI debt instruments |
| Government bonds (< 1 year) | Government bonds approaching maturity |
| Commercial paper | Short-term corporate debt |
1.2 MMF Characteristics
- NAV almost always rises — because the portfolio contains instruments providing fixed interest/coupons
- Very low fluctuation — historically, monthly MMF returns are rarely negative
- Liquid — can be redeemed anytime, funds received in 1–7 business days
- Tax-free — gains from unit sales are not subject to income tax
1.3 Popular MMF Products in Indonesia
| Product Name | Investment Manager | 1-Year Return* | Expense Ratio |
|---|---|---|---|
| Sucorinvest Money Market | Sucorinvest AM | ~5.0% | 0.85% |
| Bahana Dana Likuid | Bahana TCW | ~4.8% | 0.80% |
| Mandiri Investa Pasar Uang | Mandiri Investasi | ~4.5% | 0.75% |
| CIMB Principal Cash Fund | CIMB Principal | ~4.7% | 0.90% |
*Historical returns as of early 2026. Past performance does not guarantee future results.
Part 2: What Is a Bank Deposit?
A bank deposit (deposito) is a savings product at a bank with a fixed interest rate and a specific term (tenor). Unlike regular savings accounts, deposits cannot be withdrawn before maturity without penalty.
2.1 Types of Deposits
| Type | Characteristics |
|---|---|
| Time deposit (deposito berjangka) | 1, 3, 6, 12-month terms. Interest paid at maturity or monthly |
| On-call deposit | Minimum 7 days, interest calculated daily |
| Certificate of deposit | Transferable, secondary market exists |
2.2 Deposit Characteristics
- Fixed interest — determined at the start, doesn’t change during the term
- Locked — cannot be withdrawn before maturity (or faces penalty)
- Guaranteed by LPS — up to IDR 2 billion per customer per bank
- 20% tax — final income tax on deposit interest
2.3 Bank Deposit Rates at Major Indonesian Banks (2026)
| Bank | 1-Month Term | 3-Month Term | 12-Month Term |
|---|---|---|---|
| BCA | 2.50% | 2.75% | 3.00% |
| Mandiri | 2.75% | 3.00% | 3.25% |
| BRI | 2.75% | 3.00% | 3.50% |
| BNI | 2.75% | 3.00% | 3.25% |
| Digital banks (Sea Bank, etc.) | 4.00% | 4.50% | 5.00% |
*Rates as of early 2026. Subject to change.
Note: Digital banks generally offer higher interest due to lower operating costs.
Part 3: After-Tax Return Comparison
This is where the most significant difference lies: taxes.
3.1 MMF vs Deposit Taxation
| Instrument | Tax on Gains | Legal Basis |
|---|---|---|
| MMF | 0% | UU PPh Article 4(3)(i) |
| Deposit | 20% final income tax | PP No. 131 Year 2000 |
3.2 Simulation with Same Gross Return
Suppose both offer 5% gross annual return:
| MMF (5% gross) | Deposit (5% gross) | |
|---|---|---|
| Principal | IDR 100,000,000 | IDR 100,000,000 |
| Gross return | IDR 5,000,000 | IDR 5,000,000 |
| Tax | IDR 0 | IDR 1,000,000 (20%) |
| Net return | IDR 5,000,000 | IDR 4,000,000 |
| Net return % | 5.0% | 4.0% |
Difference: IDR 1,000,000 or 25% more in the MMF.
3.3 Concrete Simulation: IDR 10M, 50M, 100M
Assumptions:
- MMF: 4.8% annual gross return
- Deposit: 4.5% annual gross return (average digital bank)
- Term: 1 year
IDR 10 Million Simulation
| MMF | Deposit | |
|---|---|---|
| Principal | IDR 10,000,000 | IDR 10,000,000 |
| Gross return | IDR 480,000 | IDR 450,000 |
| Tax | IDR 0 | IDR 90,000 |
| Net return | IDR 480,000 | IDR 360,000 |
| Final value | IDR 10,480,000 | IDR 10,360,000 |
| Difference | +IDR 120,000 | — |
IDR 50 Million Simulation
| MMF | Deposit | |
|---|---|---|
| Principal | IDR 50,000,000 | IDR 50,000,000 |
| Gross return | IDR 2,400,000 | IDR 2,250,000 |
| Tax | IDR 0 | IDR 450,000 |
| Net return | IDR 2,400,000 | IDR 1,800,000 |
| Final value | IDR 52,400,000 | IDR 51,800,000 |
| Difference | +IDR 600,000 | — |
IDR 100 Million Simulation
| MMF | Deposit | |
|---|---|---|
| Principal | IDR 100,000,000 | IDR 100,000,000 |
| Gross return | IDR 4,800,000 | IDR 4,500,000 |
| Tax | IDR 0 | IDR 900,000 |
| Net return | IDR 4,800,000 | IDR 3,600,000 |
| Final value | IDR 104,800,000 | IDR 103,600,000 |
| Difference | +IDR 1,200,000 | — |
3.4 5-Year Gap (Compounded)
What if IDR 100 million is left for 5 years?
| MMF (4.8% net) | Deposit (3.6% net) | |
|---|---|---|
| Initial principal | IDR 100,000,000 | IDR 100,000,000 |
| Year 1 | IDR 104,800,000 | IDR 103,600,000 |
| Year 2 | IDR 109,830,400 | IDR 107,329,600 |
| Year 3 | IDR 115,102,259 | IDR 111,193,466 |
| Year 4 | IDR 120,627,168 | IDR 115,196,430 |
| Year 5 | IDR 126,417,272 | IDR 119,343,502 |
| Difference | +IDR 7,073,770 | — |
Over 5 years, MMF generates IDR 7 million more purely from tax efficiency.
Part 4: Liquidity Comparison
4.1 Withdrawal Speed
| Instrument | Withdrawal Time | Cost |
|---|---|---|
| MMF | T+1 to T+7 (1–7 business days) | Free |
| Deposit (at maturity) | At maturity | Free |
| Deposit (before maturity) | Possible, but… | Interest penalty |
4.2 Early Deposit Withdrawal Penalties
If you withdraw a deposit before maturity:
- Accrued interest may be forfeited (not paid)
- Already-paid interest may be deducted from principal
- Administrative fees at some banks
Example:
- IDR 50 million deposit, 6-month term, 4.5%/year interest
- Withdrawn at month 3
- Potential loss: 3-month interest = IDR 562,500 (before tax)
4.3 When Does Liquidity Matter?
| Need | MMF | Deposit |
|---|---|---|
| Emergency fund | ✅ Ideal | ⚠️ Less flexible |
| Temporary fund parking | ✅ Ideal | ❌ Too rigid |
| Savings goal with exact date | ✅ Possible | ✅ Possible (match tenor) |
| Funds not to be touched for 1 year | ✅ Possible | ✅ Possible |
Part 5: Safety Comparison
5.1 LPS Guarantee vs Diversification
| Instrument | Protection | Limit |
|---|---|---|
| Deposit | Guaranteed by LPS | Max IDR 2 billion per customer per bank |
| MMF | Not guaranteed by LPS | But diversified across many instruments |
5.2 Actual Risks
Deposit:
- If bank fails and funds > IDR 2 billion: potential loss
- If bank fails and funds < IDR 2 billion: 100% guaranteed by LPS
- Historical risk: very low for major banks (BCA, Mandiri, BRI, BNI)
MMF:
- If investment manager fails: funds remain safe because a custodian bank holds the assets
- NAV decline risk: very low, almost never negative annually
- Underlying default risk: diversified, so impact is minimal
5.3 When Does the LPS Guarantee Matter?
| Amount | Safer In |
|---|---|
| < IDR 2 billion | Deposit (100% guaranteed) |
| > IDR 2 billion | MMF (diversified) |
Irony: For large amounts (> IDR 2 billion), MMFs are actually safer than deposits because they’re not concentrated in one bank.
Part 6: When to Choose Money Market Funds
MMFs are the better choice when:
6.1 Emergency Fund
An emergency fund needs an instrument that is:
- ✅ Stable (cannot decline)
- ✅ Liquid (withdrawable anytime)
- ✅ Return > inflation
MMFs meet all criteria and are tax-free. Keep 1–2 months of expenses in a savings account for ultra-urgent needs, the rest in MMF.
6.2 Temporary Fund Parking
Waiting for the right time to buy a house, car, or make another investment? MMF is the ideal “parking spot”:
- Not locked like a deposit
- Returns higher than savings accounts
- Can be withdrawn within days
6.3 Short-Term Education Fund
If your child enters university in 1–2 years, MMF is more suitable than equity funds (too volatile) or deposits (high tax).
6.4 Funds > IDR 2 Billion
If you have a large amount exceeding the LPS guarantee limit, MMFs are safer due to diversification across multiple instruments and banks.
Part 7: When to Choose Bank Deposits
Deposits are the better choice when:
7.1 You Need a Psychological “Lock”
For some people, the ease of MMF withdrawal is actually a problem — too easy to access. A “locked” deposit provides savings discipline.
7.2 You’re Very Conservative and Need a Guarantee
If peace of mind is more important than maximum return, the LPS guarantee provides certainty that your money is 100% safe up to IDR 2 billion.
7.3 You Have an Exact Target Date
If you know exactly when you need the money (e.g., down payment in 6 months), a deposit with the matching tenor provides certainty:
- Fixed interest (not fluctuating)
- Fixed withdrawal date
- Not tempted to spend early
7.4 Bank Offers High Promotional Interest
Sometimes banks (especially digital banks) offer promotional rates of 6–7% for new customers. If the promotional rate is very high, a deposit might be more attractive — but calculate after tax first.
Example:
- Promotional deposit 6.5% gross = 5.2% net (after 20% tax)
- Average MMF 4.8% net
In this case, the promotional deposit is more profitable.
Part 8: Hybrid Strategy — Combining Both
You don’t have to choose just one. You can combine them:
8.1 Emergency Fund Strategy
| Component | Instrument | Amount | Reason |
|---|---|---|---|
| Ultra-emergency | Savings account | 1 month expenses | Instant access |
| Emergency | MMF | 3–5 months expenses | Optimal return, liquid |
| Total | 4–6 months expenses |
8.2 Strategy for Large Idle Funds
If you have IDR 500 million sitting idle:
| Component | Instrument | Amount | Reason |
|---|---|---|---|
| Liquid | MMF | IDR 100 million | Withdrawable anytime |
| Semi-liquid | 1–3 month deposits | IDR 200 million | LPS guarantee (< IDR 2B) |
| Growth | MMF across multiple MIs | IDR 200 million | Manager diversification |
8.3 Deposit Laddering Strategy
If you still want deposits but need liquidity:
| Deposit | Term | Amount | Matures |
|---|---|---|---|
| A | 1 month | IDR 25 million | Every month |
| B | 2 months | IDR 25 million | Every month |
| C | 3 months | IDR 25 million | Every month |
| D | 3 months (offset) | IDR 25 million | Every month |
With this strategy, a deposit matures every month — providing MMF-like liquidity while still earning deposit interest.
Part 9: Common Questions
“Can money market funds lose money?”
Very rarely. Historically, MMFs almost never record negative returns over a 1-year period. Monthly returns can occasionally be negative (very small), but annual returns are practically always positive.
Main MMF risks:
- Investment manager risk — mitigated by choosing large, reputable MIs
- Underlying liquidity risk — mitigated by portfolio diversification
- Interest rate risk — if BI rate drops, MMF returns also drop
“Are deposits fully guaranteed?”
Up to IDR 2 billion per customer per bank, yes. LPS (Lembaga Penjamin Simpanan / Deposit Insurance Corporation) guarantees savings provided:
- Bank is LPS-registered
- Interest doesn’t exceed LPS guaranteed rate
- Funds < IDR 2 billion per customer per bank
If a bank fails and your funds meet the requirements, LPS will reimburse 100%.
“Which is better for a house down payment?”
Depends on the time horizon:
- < 1 year: MMF (liquid, no penalty if needed sooner)
- 1–2 years with exact date: Deposit (fixed interest, fixed date)
- > 2 years: Consider a mix with fixed income funds for higher returns
“Will MMF returns drop if the BI rate drops?”
Yes, but not immediately. MMFs have underlying assets with various maturities, so the impact of a BI rate cut is felt gradually (1–6 months). Deposits are also affected — banks lower deposit rates following the BI rate.
Conclusion
Comparison Summary
| Criterion | Winner | Reason |
|---|---|---|
| After-tax return | 🏆 MMF | Tax-free vs 20% tax |
| Liquidity | 🏆 MMF | Withdrawable anytime |
| Safety (< IDR 2B) | 🏆 Deposit | 100% LPS guarantee |
| Safety (> IDR 2B) | 🏆 MMF | Diversified |
| Savings discipline | 🏆 Deposit | “Lock” prevents temptation |
| Ease of access | Tie | Both easy via app |
| Minimum investment | 🏆 MMF | IDR 10,000 vs IDR 1M+ |
Final Recommendation
| Your Profile | Recommendation |
|---|---|
| Beginner building emergency fund | MMF — more liquid, higher return |
| Conservative needing guarantee | Deposit — peace of mind from LPS |
| Funds > IDR 2 billion | MMF — safer diversification |
| Need spending discipline | Deposit — psychological “lock” |
| Temporary fund parking | MMF — not locked |
| Exact target date | Deposit — certainty of interest and timing |
| Optimal | Combination — 60–70% MMF + 30–40% deposit |
Core principle:
- If you prioritize return efficiency: choose MMF
- If you prioritize certainty and guarantee: choose deposit
- If you want both: combine them
Both are very safe and suitable for short-term goals. The “wrong” choice between the two won’t hurt you significantly. What matters is that you start saving — whether in MMF or deposit.
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Frequently asked questions
Which is more profitable: money market fund or bank deposit in Indonesia?
With the same gross return, money market funds (MMF) are more profitable because they are tax-free, while deposits are taxed at 20% on interest income. Example: MMF 5% gross = 5% net, deposit 5% gross = 4% net. MMF generates 25% more after tax. However, deposits have the advantage of LPS (Deposit Insurance) guarantee up to IDR 2 billion.
Are money market funds safe in Indonesia?
Money market funds are relatively safe — they invest in short-term instruments like deposits, Bank Indonesia certificates, and bonds maturing in < 1 year. Downside risk is very small (historically almost never negative annually). However, MMFs are not guaranteed by LPS like deposits. For funds < IDR 2 billion, deposits are more 'guaranteed', but for funds > IDR 2 billion, MMFs are actually safer due to diversification.
How long does it take to withdraw from a money market fund?
MMF withdrawal takes T+1 to T+7 (1-7 business days), depending on the investment manager's policy. Most MMFs on Bibit/Bareksa process withdrawals in T+1 to T+3. This is slower than savings accounts (instant) but more flexible than deposits (must wait until maturity or face penalties).
For an emergency fund, is MMF or deposit better?
For emergency funds, MMF is the more optimal choice because: (1) more liquid — can be withdrawn anytime without penalty, (2) higher return after tax, (3) lower minimum (IDR 10,000). Keep 1-2 months of expenses in a savings account for ultra-urgent needs, the rest in MMF. Deposits are suitable if you need a psychological 'lock' to prevent impulsive spending.