What is a money market fund for?
Money market funds hold T-bills, bank CDs and top-rated commercial paper maturing within a year. In April 2026 they yielded about 6.3%-6.8%, against 3.0%-3.5% in a savings account, and most redeem T+1 with no exit load. They suit money you'll need in 3 to 9 months.
Say you have ₹5 lakh sitting in your savings account at 3.5%. You don't need it for the next 3-9 months. You don't want the rate volatility of a short duration fund. You don't want the tax drag of an FD with quarterly TDS. Money market funds are designed exactly for this gap. They earn around 6.3%-6.8%, have NAV volatility close to zero on most days, and can be redeemed T+1 without exit load.
Retail investors under-use this category. AMFI data shows it at about ₹3.35 lakh crore in AUM in April 2026 (₹3.40 lakh crore across 27 schemes in August 2026). That is large, but most of it is company treasury money and HNIs.
What SEBI Says a Money Market Fund Is
Per SEBI's categorisation circular (latest version dated 26 February 2026), a money market mutual fund must invest in money market instruments with a residual maturity of up to 1 year. The eligible instrument set is narrow and high-quality:
- Treasury Bills (T-Bills): 91-day, 182-day, and 364-day government paper. Sovereign credit. Zero default risk.
- Certificates of Deposit (CDs): Issued by scheduled commercial banks. Top-rated CDs from SBI, HDFC Bank, ICICI Bank, Axis, Kotak.
- Commercial Paper (CP): Short-term unsecured corporate borrowings. A1+ rated only in well-managed money market funds.
- Tri-party Repos (TREPS): Overnight collateralised lending against G-Secs.
Notice what's not on the list: long bonds, AA paper chasing yield, structured products. The category is deliberately narrow.
The Yield Math and Why It Beats Your Savings Account
April 2026 indicative numbers:
| Parking Vehicle | Pre-tax Yield | Post-tax (30% slab) |
| Savings account | 3.0%–3.5% | 2.1%–2.45% |
| Sweep FD | 5.5%–6.5% | 3.85%–4.55% |
| Liquid fund | 6.0%–6.4% | 4.20%–4.48% |
| Money market fund | 6.3%–6.8% | 4.41%–4.76% |
| Ultra short duration | 6.5%–7.0% | 4.55%–4.90% |
On ₹10 lakh parked for 9 months, the difference between a savings account at 3% and a money market fund at 6.5% is roughly ₹26,250 in pre-tax accrual. After 30% tax, that's about ₹18,375 extra, just from moving where the money sits.
Money market fund or liquid fund: which one?
Liquid funds (residual maturity ≤91 days) and money market funds (≤365 days) both serve the parking use case. The difference is subtle but real:
- Liquid funds are for true cash equivalents: 1 to 90 days. Instant redemption up to ₹50,000 per day per fund (SEBI rule). Almost zero rate sensitivity. Yield 6.0%-6.4%.
- Money market funds are for 3 to 9 months. Slightly higher yield (around 30-40 bps premium). Slightly more NAV volatility because the average residual maturity can stretch to 6-9 months. Still extremely stable on a daily basis.
Practical rule: if you might touch the money in the next 30 days, use liquid. Beyond that, money market gets you a small but free yield bump.
When to Use Money Market Funds
- Down payment savings 4-9 months out. Home down payment, car booking, business equipment. The money is committed but not yet deployed.
- Tax planning float. Money set aside for the March 31 tax-saving deadline that you'll deploy across PPF, ELSS, and insurance over the year.
- Bonus and ESOP windfalls. A ₹3 lakh annual bonus you'll spread across multiple investments over the next few months.
- Goal corpus 6-12 months from completion. When you've nearly reached the target and want to reduce volatility before withdrawal.
- Treasury for small business and freelancers. Working capital float and quarterly GST/advance tax provisions.
When to Avoid
- Sub-30-day horizons: use liquid funds for the daily-redemption flexibility.
- Goals 12+ months away: ultra short or short duration deliver more yield with manageable risk.
- If you're in 0% or 5% tax slab and the amount is under ₹5 lakh: a sweep FD probably wins after factoring in convenience and DICGC insurance up to ₹5 lakh.
- To chase yield: any money market fund advertising significantly above category average is taking on credit or maturity risk it shouldn't be.
Tax Treatment
Same as other debt mutual funds for units bought on or after 1 April 2023 (units bought earlier and held over 24 months are taxed at 12.5%): gains are added to your slab and taxed at your marginal rate. No indexation. No long-term threshold. Holding for 3+ years no longer changes the tax outcome.
Concrete example. ₹5 lakh in a money market fund at 6.5% for 9 months. Roughly ₹24,375 in accrued gains. At 30% slab, tax of about ₹7,313. Post-tax effective yield: 4.55%. Still a meaningful improvement over a savings account, but the tax leakage is real and worth modeling before assuming the headline yield is your take-home.
One small advantage versus FDs: there is no TDS deducted at source. You pay the tax when filing your ITR, which gives you cash flow flexibility through the year.
How to Evaluate a Money Market Fund
- AUM threshold. Stick to funds with at least ₹3,000 crore. Smaller schemes risk forced selling during redemption shocks.
- Expense ratio (Direct plan). Anything above 0.30% is expensive. The best in class run at 0.15%-0.25%.
- Credit quality. Demand 95%+ in A1+ / Sovereign / AAA-equivalent. CP from anything other than top-tier issuers is the first place to look for hidden risk.
- Average maturity. Should be 3-9 months. Funds drifting toward 11 months are quietly taking more rate risk.
- Yield-to-maturity (YTM). Compare against category median. A fund yielding 50+ bps above category is taking on extra risk somewhere, so find out what it is.
- Fund house: large AMCs such as HDFC AMC, ICICI Prudential, Aditya Birla Sun Life, Nippon India, SBI MF and Kotak run big money market schemes, but size alone isn't a reason to pick one. Check the latest fact sheet against the points above.
FAQ
Is a money market fund safer than a bank FD?
Different risk profiles. FDs up to ₹5 lakh are insured by DICGC. Money market funds carry tiny credit and rate risks but are diversified across many issuers. For amounts above ₹5 lakh, money market funds are arguably safer than concentration in a single bank.
Can the NAV ever go down?
Yes, occasionally, by very small amounts. A sudden 100 bps rate spike can dent NAV by 0.3%-0.6%. A credit event in a held CP can cause a one-day mark-down. Both are rare and usually recovered within weeks.
How quickly can I redeem?
T+1 for full redemption, with no exit load on most schemes. Place your request before 3 PM on a business day; money hits your account the next working day.
Money market fund or arbitrage fund for parking?
Arbitrage funds are taxed as equity (20% STCG within 12 months; 12.5% LTCG above ₹1.25 lakh a year). For 30% slab investors holding 12+ months, arbitrage often wins on post-tax basis. For shorter holds or lower slabs, money market wins on stability.
Is a money market fund SIP a good idea?
Mainly for goal-based corpus building, like saving for school admission 9 months out. For pure parking of existing cash, just lump-sum it.
What happens if a CP issuer defaults?
The fund marks down its exposure to that paper. Diversified money market funds rarely have more than 5% in any one issuer, so the NAV impact is contained. This is the case for sticking to A1+ issuers and AUM-heavy funds.
The Bottom Line
If you have ₹2 lakh or more sitting in a savings account for 3 months or more, you are giving up yield for no real benefit. A money market fund is the simplest fix. They earn around 6.5%, sit on a portfolio of T-bills and top-rated bank CDs, and let you redeem on T+1 without exit load.
The tax now hits at slab rate, so post-tax yield in the 30% bracket is around 4.5%-4.7%, still 200+ bps above your savings account. Pick a fund with ₹3,000 crore+ AUM, sub-0.30% expense ratio, 95%+ in A1+ and sovereign paper, and an average maturity within the 3-9 month band.
Run your numbers: compare a debt fund with a bank deposit using the FD and RD calculator, and if you plan regular withdrawals, see how long the money lasts with the SWP calculator. For a one-time investment, use the lumpsum calculator.
Run your numbers: before moving cash out of a sweep FD, check what the deposit would actually pay with the FD and RD calculator. If you'll draw the money down in instalments, the SWP calculator shows how long it lasts, and the lumpsum calculator projects a one-time deposit.