Money Market Funds vs Time Deposits: Which Is More Profitable?
Complete comparison of money market funds vs time deposits: after-tax returns, liquidity, safety, and simulations for Rp 10 million, 50 million, 100 million over 1 year.
Money Market Funds vs Time Deposits: Complete Comparison
Money market funds (RDPU/Reksa Dana Pasar Uang) and time deposits are two instruments often compared because of similar characteristics: low-to-moderate returns, low risk, and suitable for short-term goals.
But which is better?
Spoiler: There is no “universally better” option. There’s only what’s more suitable for your situation. This article will help you choose by comparing both instruments from various aspects — including concrete return simulations with actual Rupiah figures.
Quick Comparison Table
| Aspect | Money Market Fund (RDPU) | Time Deposit |
|---|---|---|
| Gross return | 4-5.5%/year | 3.5-5%/year |
| Tax | 0% (exempt) | 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/reduced |
| Minimum | Rp 10,000 | Rp 1-10 million |
| Guarantee | Not LPS guaranteed | LPS guaranteed (max Rp 2 billion) |
| Risk | Very low | Very low |
| Suitable for | Emergency fund, parking cash | Savings goals, disciplined saving |
Key insight: With the same gross return, RDPU yields 20-25% more after taxes.
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 with maturities of less than 1 year.
1.1 RDPU Portfolio Contents
| Instrument | Description |
|---|---|
| Bank deposits | Placed across various banks |
| SBI (Sertifikat Bank Indonesia) | Short-term Bank Indonesia debt certificates |
| Government bonds (< 1 year) | Government securities approaching maturity |
| Commercial paper | Short-term corporate debt securities |
1.2 RDPU Characteristics
- NAV almost always rises — because the portfolio contains instruments that provide fixed interest/coupons
- Very low fluctuation — historically, monthly RDPU returns are rarely negative
- Liquid — can be withdrawn anytime, funds arrive in 1-7 business days
- Tax-free — gains from sales are not subject to income tax
1.3 Popular RDPU Product Examples
| 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 return as of early 2026. Past returns don’t guarantee future returns.
Part 2: What Is a Time Deposit?
A time deposit is a bank savings product with a fixed interest rate and specific term (tenor). Unlike regular savings accounts, deposits cannot be withdrawn before maturity without penalty.
2.1 Types of Deposits
| Type | Characteristics |
|---|---|
| Fixed-term deposit | Tenor 1, 3, 6, 12 months. Interest paid at maturity or monthly |
| On-call deposit | Minimum 7 days, interest calculated daily |
| Certificate of deposit | Transferable, has secondary market |
2.2 Deposit Characteristics
- Fixed interest — determined upfront, doesn’t change during tenor
- Locked — cannot be withdrawn before maturity (or faces penalty)
- LPS guaranteed — up to Rp 2 billion per customer per bank
- 20% tax — final income tax on deposit interest
2.3 Major Bank Deposit Interest Rates (2026)
| Bank | 1-Month Tenor | 3-Month Tenor | 12-Month Tenor |
|---|---|---|---|
| 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% |
*Interest rates as of early 2026. Subject to change.
Note: Digital banks generally offer higher rates due to lower operating costs.
Part 3: After-Tax Return Comparison
This is where the most significant difference lies: taxes.
3.1 RDPU vs Deposit Tax
| Instrument | Tax on Gains | Legal Basis |
|---|---|---|
| RDPU | 0% | Income Tax Law Article 4 paragraph 3 letter i |
| Deposit | 20% final income tax | Government Regulation No. 131 of 2000 |
3.2 Simulation with Same Gross Return
Let’s say both offer 5% gross return per year:
| RDPU (5% gross) | Deposit (5% gross) | |
|---|---|---|
| Principal | Rp 100,000,000 | Rp 100,000,000 |
| Gross return | Rp 5,000,000 | Rp 5,000,000 |
| Tax | Rp 0 | Rp 1,000,000 (20%) |
| Net return | Rp 5,000,000 | Rp 4,000,000 |
| Net return % | 5.0% | 4.0% |
Difference: Rp 1,000,000 or 25% more in RDPU.
3.3 Concrete Simulation: Rp 10 Million, 50 Million, 100 Million
Assumptions:
- RDPU: 4.8%/year gross return
- Deposit: 4.5%/year gross return (digital bank average)
- Tenor: 1 year
Simulation Rp 10 Million
| RDPU | Deposit | |
|---|---|---|
| Principal | Rp 10,000,000 | Rp 10,000,000 |
| Gross return | Rp 480,000 | Rp 450,000 |
| Tax | Rp 0 | Rp 90,000 |
| Net return | Rp 480,000 | Rp 360,000 |
| Final value | Rp 10,480,000 | Rp 10,360,000 |
| Difference | +Rp 120,000 | - |
Simulation Rp 50 Million
| RDPU | Deposit | |
|---|---|---|
| Principal | Rp 50,000,000 | Rp 50,000,000 |
| Gross return | Rp 2,400,000 | Rp 2,250,000 |
| Tax | Rp 0 | Rp 450,000 |
| Net return | Rp 2,400,000 | Rp 1,800,000 |
| Final value | Rp 52,400,000 | Rp 51,800,000 |
| Difference | +Rp 600,000 | - |
Simulation Rp 100 Million
| RDPU | Deposit | |
|---|---|---|
| Principal | Rp 100,000,000 | Rp 100,000,000 |
| Gross return | Rp 4,800,000 | Rp 4,500,000 |
| Tax | Rp 0 | Rp 900,000 |
| Net return | Rp 4,800,000 | Rp 3,600,000 |
| Final value | Rp 104,800,000 | Rp 103,600,000 |
| Difference | +Rp 1,200,000 | - |
3.4 Difference Over 5 Years (Compound)
What if Rp 100 million is left for 5 years?
| RDPU (4.8% net) | Deposit (3.6% net) | |
|---|---|---|
| Initial principal | Rp 100,000,000 | Rp 100,000,000 |
| Year 1 | Rp 104,800,000 | Rp 103,600,000 |
| Year 2 | Rp 109,830,400 | Rp 107,329,600 |
| Year 3 | Rp 115,102,259 | Rp 111,193,466 |
| Year 4 | Rp 120,627,168 | Rp 115,196,430 |
| Year 5 | Rp 126,417,272 | Rp 119,343,502 |
| Difference | +Rp 7,073,770 | - |
Over 5 years, RDPU generates Rp 7 million more just from tax efficiency.
Part 4: Liquidity Comparison
4.1 Withdrawal Speed
| Instrument | Withdrawal Time | Cost |
|---|---|---|
| RDPU | T+1 to T+7 (1-7 business days) | Free |
| Deposit | At maturity | Free |
| Deposit (before maturity) | Possible, but… | Interest penalty |
4.2 Deposit Early Withdrawal Penalty
If you withdraw a deposit before maturity:
- Accrued interest may be forfeited (not paid)
- Interest already paid may be deducted from principal
- Administrative fees at some banks
Example:
- Rp 50 million deposit, 6-month tenor, 4.5%/year interest
- Withdrawn at month 3
- Potential loss: 3 months interest = Rp 562,500 (before tax)
4.3 When Is Liquidity Important?
| Need | RDPU | Deposit |
|---|---|---|
| Emergency fund | ✅ Ideal | ⚠️ Less flexible |
| Temporary cash parking | ✅ Ideal | ❌ Too rigid |
| Savings goal with fixed date | ✅ Works | ✅ Works (match tenor) |
| Funds untouched for 1 year | ✅ Works | ✅ Works |
Part 5: Safety Comparison
5.1 LPS Guarantee vs Diversification
| Instrument | Protection | Limit |
|---|---|---|
| Deposit | LPS guaranteed | Max Rp 2 billion per customer per bank |
| RDPU | Not LPS guaranteed | But diversified across many instruments |
5.2 Real Risks
Deposit:
- If bank fails and funds > Rp 2 billion: potential loss
- If bank fails and funds < Rp 2 billion: 100% LPS guaranteed
- Historical risk: very low for major banks (BCA, Mandiri, BRI, BNI)
RDPU:
- If investment manager fails: funds remain safe because there’s a custodian bank
- NAV decline risk: very low, almost never negative annually
- Underlying default risk: diversified, so impact is minimal
5.3 When Is LPS Guarantee Important?
| Amount of Funds | Safer In |
|---|---|
| < Rp 2 billion | Deposit (100% guaranteed) |
| > Rp 2 billion | RDPU (diversified) |
Irony: For large funds (> Rp 2 billion), RDPU is actually safer than deposits because it’s not concentrated in one bank.
Part 6: When to Choose RDPU?
RDPU is the better choice if:
6.1 Emergency Fund
Emergency funds need instruments that are:
- ✅ Stable (shouldn’t decline)
- ✅ Liquid (can be withdrawn anytime)
- ✅ Returns > inflation
RDPU meets all criteria and is tax-free. Keep 1-2 months of expenses in a savings account for ultra-emergency needs, the rest in RDPU.
6.2 Temporary Cash Parking
Waiting for the right time to buy a house, car, or other investment? RDPU is an ideal “parking” spot:
- Not locked like deposits
- Higher returns than savings accounts
- Can be withdrawn in days
6.3 Short-Term Education Fund
If your child is entering college in 1-2 years, RDPU is more suitable than equity funds (too volatile) or deposits (high tax).
6.4 Funds > Rp 2 Billion
If you have large funds exceeding the LPS guarantee limit, RDPU is safer because it’s diversified across various instruments and banks.
Part 7: When to Choose Deposits?
Deposits are the better choice if:
7.1 You Need a Psychological “Lock”
For some people, RDPU’s easy withdrawal is actually a problem — too easy to spend. Deposits that are “locked” provide saving discipline.
7.2 You’re Very Conservative and Need Guarantees
If peace of mind is more important than maximum returns, LPS guarantee provides certainty that your money is 100% safe up to Rp 2 billion.
7.3 You Have a Fixed Target Date
If you know exactly when you’ll need the money (e.g., house down payment in 6 months), a deposit with matching tenor provides certainty:
- Fixed interest (not fluctuating)
- Fixed withdrawal date
- No temptation to use early
7.4 Bank Offers High Promotional Rates
Sometimes banks (especially digital banks) offer 6-7% promotional rates for new customers. If promotional rates are very high, deposits can be more attractive — but calculate after taxes first.
Example:
- Promotional deposit 6.5% gross = 5.2% net (after 20% tax)
- Average RDPU 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 both:
8.1 Emergency Fund Strategy
| Component | Instrument | Amount | Reason |
|---|---|---|---|
| Ultra-emergency | Savings account | 1 month expenses | Instant access |
| Emergency | RDPU | 3-5 months expenses | Optimal returns, liquid |
| Total | 4-6 months expenses |
8.2 Large Idle Funds Strategy
If you have Rp 500 million sitting idle:
| Component | Instrument | Amount | Reason |
|---|---|---|---|
| Liquid | RDPU | Rp 100 million | Can withdraw anytime |
| Semi-liquid | 1-3 month deposit | Rp 200 million | LPS guarantee (< Rp 2B) |
| Growth | RDPU across several IMs | Rp 200 million | Manager diversification |
8.3 Deposit Laddering Strategy
If you still want deposits but need liquidity:
| Deposit | Tenor | Amount | Maturity |
|---|---|---|---|
| A | 1 month | Rp 25 million | Every month |
| B | 2 months | Rp 25 million | Every month |
| C | 3 months | Rp 25 million | Every month |
| D | 3 months (shifted) | Rp 25 million | Every month |
With this strategy, a deposit matures every month — providing RDPU-like liquidity while still earning deposit interest.
Part 9: FAQ
”Can RDPU lose money?”
Very rarely. Historically, RDPU have almost never recorded negative returns over a 1-year period. Monthly returns can be negative (very small), but annual returns are practically always positive.
Main RDPU risks:
- Investment manager risk — mitigated by choosing large, reputable IMs
- Underlying liquidity risk — mitigated by portfolio diversification
- Interest rate risk — if BI rate drops, RDPU returns also drop
”Are deposits fully guaranteed?”
Up to Rp 2 billion per customer per bank, yes. LPS (Lembaga Penjamin Simpanan/Deposit Insurance Corporation) guarantees deposits with conditions:
- Bank is LPS registered
- Interest doesn’t exceed LPS guaranteed rate
- Funds < Rp 2 billion per customer per bank
If a bank fails and your funds meet the criteria, LPS will reimburse 100%.
”Which is better for a house down payment?”
Depends on time horizon:
- < 1 year: RDPU (liquid, no penalty if needed sooner)
- 1-2 years with fixed date: Deposit (fixed interest, fixed date)
- > 2 years: Consider mixing with fixed income funds for higher returns
”Will RDPU returns drop if BI rate drops?”
Yes, but not immediately. RDPU have underlying instruments with various maturities, so the impact of BI rate cuts will be felt gradually (1-6 months). Deposits are also affected — banks will lower deposit rates following the BI rate.
”Is a tax ID (NPWP) required to buy RDPU or deposits?”
- RDPU: NPWP not mandatory, but transactions > Rp 100 million usually require it
- Deposit: Depends on bank policy, usually required for large amounts
Conclusion
Comparison Summary
| Criterion | Winner | Reason |
|---|---|---|
| After-tax return | 🏆 RDPU | Tax-free vs 20% |
| Liquidity | 🏆 RDPU | Can withdraw anytime |
| Safety (< Rp 2B) | 🏆 Deposit | 100% LPS guarantee |
| Safety (> Rp 2B) | 🏆 RDPU | Diversified |
| Saving discipline | 🏆 Deposit | ”Locked” prevents temptation |
| Ease of access | Tie | Both easy via app |
| Minimum investment | 🏆 RDPU | Rp 10,000 vs Rp 1+ million |
Final Recommendations
| Your Profile | Recommendation |
|---|---|
| Beginner with emergency fund | RDPU — more liquid, higher returns |
| Conservative needing guarantees | Deposit — peace of mind from LPS |
| Funds > Rp 2 billion | RDPU — diversification is safer |
| Need saving discipline | Deposit — psychological “lock” |
| Temporary cash parking | RDPU — not locked |
| Fixed target date | Deposit — interest and timing certainty |
| Optimal | Combination — 60-70% RDPU + 30-40% deposit |
Basic principle:
- If you prioritize return efficiency: choose RDPU
- If you prioritize certainty and guarantees: choose deposits
- If you want both: combine them
Both are instruments that are very safe and suitable for short-term goals. The “wrong” choice between them won’t hurt you significantly. What matters is that you start saving — whether in RDPU or deposits.