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.

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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.

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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.

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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.

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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.

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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

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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.

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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.

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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.

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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.

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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.

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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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