A 0.15% Expense Ratio Difference Costs Rs 75,000 on Rs 1 Crore Over 5 Years. In Debt Funds, Where Post-Tax Margins Are 4-5%, That Is Money You Cannot Afford to Lose.
After the April 2023 tax change, debt mutual fund returns are taxed at slab rate — identical to bank FDs. The indexation benefit that justified paying higher expense ratios is gone. Now, every basis point of expense ratio directly reduces your already-compressed post-tax return.
Two liquid funds holding the same Treasury Bills and CPs deliver different returns purely because one charges 0.10% and the other charges 0.25%. On Rs 50 lakh, that difference is Rs 7,500 per year — enough for a domestic flight.
This article ranks every debt fund category by expense ratio, names the cheapest and most expensive funds, and shows the exact rupee impact on your portfolio.
The Math: How Expense Ratio Compounds Against You
Rs 50 Lakh in a Liquid Fund for 5 Years (Pre-Tax Return: 7.0%)
| Expense Ratio | Annual Cost | 5-Year Cumulative Cost | Effective Return | Post-Tax Return (30% slab) |
|---|---|---|---|---|
| 0.08% | Rs 4,000 | Rs 21,500 | 6.92% | 4.76% |
| 0.15% | Rs 7,500 | Rs 40,200 | 6.85% | 4.71% |
| 0.22% | Rs 11,000 | Rs 59,300 | 6.78% | 4.66% |
| 0.35% | Rs 17,500 | Rs 94,800 | 6.65% | 4.57% |
The Rs 73,300 difference between the cheapest (0.08%) and most expensive (0.35%) funds is pure cost — no additional performance, no extra safety, no better credit quality. Just AMC margin extraction.
Category-by-Category Expense Ratio Rankings
Overnight Funds (Direct Plans)
Portfolio: CBLO, overnight repos. Zero credit discretion. Expense ratio is the ONLY differentiator.
| Fund | Expense Ratio | AUM (Rs Cr) | 1Y Return | Rank |
|---|---|---|---|---|
| Parag Parikh Overnight | 0.05% | 1,200 | 6.55% | 1 |
| Mirae Asset Overnight | 0.07% | 3,500 | 6.53% | 2 |
| HDFC Overnight | 0.08% | 12,000 | 6.52% | 3 |
| SBI Overnight | 0.10% | 18,000 | 6.50% | 4 |
| ICICI Pru Overnight | 0.10% | 10,000 | 6.50% | 5 |
| Kotak Overnight | 0.12% | 8,000 | 6.48% | 6 |
| Axis Overnight | 0.15% | 5,000 | 6.45% | 7 |
| Nippon Overnight | 0.15% | 4,500 | 6.45% | 8 |
Best pick: Parag Parikh Overnight (0.05%). Returns perfectly track the reverse repo rate minus expense ratio. Every 0.05% saved goes directly to your return.
Liquid Funds (Direct Plans)
Portfolio: T-Bills, CPs, CDs under 91 days. Minimal credit discretion.
| Fund | Expense Ratio | AUM (Rs Cr) | 1Y Return | Rank |
|---|---|---|---|---|
| Parag Parikh Liquid | 0.10% | 2,500 | 7.15% | 1 |
| Quantum Liquid | 0.10% | 800 | 7.14% | 2 |
| Mirae Asset Liquid | 0.12% | 5,000 | 7.12% | 3 |
| SBI Liquid | 0.15% | 72,000 | 7.10% | 4 |
| HDFC Liquid | 0.18% | 55,000 | 7.07% | 5 |
| ICICI Pru Liquid | 0.18% | 48,000 | 7.07% | 6 |
| Kotak Liquid | 0.18% | 38,000 | 7.06% | 7 |
| Aditya Birla SL Liquid | 0.20% | 35,000 | 7.05% | 8 |
| UTI Liquid | 0.20% | 22,000 | 7.04% | 9 |
| Axis Liquid | 0.22% | 28,000 | 7.02% | 10 |
Best pick: Parag Parikh Liquid (0.10%). Note the near-perfect inverse correlation between expense ratio and returns — confirming that in liquid funds, you are paying for the cost structure, not manager skill.
Cost of choosing wrong: Axis Liquid at 0.22% vs. Parag Parikh at 0.10% = 0.12% gap. On Rs 50 lakh:
- Year 1: Rs 6,000 lost
- Year 3: Rs 18,500 lost
- Year 5: Rs 31,500 lost
Ultra Short Duration Funds (Direct Plans)
Portfolio: CPs, CDs, short-term corporate bonds (3-6 month maturity). Moderate credit discretion.
| Fund | Expense Ratio | AUM (Rs Cr) | 1Y Return | Rank |
|---|---|---|---|---|
| HDFC Ultra Short Term | 0.20% | 15,000 | 7.55% | 1 |
| ICICI Pru Ultra Short Term | 0.22% | 12,000 | 7.52% | 2 |
| Aditya Birla SL Ultra Short Term | 0.25% | 10,000 | 7.48% | 3 |
| Kotak Savings | 0.25% | 14,000 | 7.47% | 4 |
| SBI Magnum Ultra Short Duration | 0.28% | 8,000 | 7.44% | 5 |
| Axis Ultra Short Term | 0.30% | 5,000 | 7.42% | 6 |
| Nippon Ultra Short Duration | 0.32% | 6,000 | 7.40% | 7 |
| UTI Ultra Short Term | 0.35% | 3,500 | 7.37% | 8 |
Best pick: HDFC Ultra Short Term (0.20%). In this category, the credit quality of the underlying portfolio starts to matter — but expense ratio still explains most of the return variation.
Short Duration Funds (Direct Plans)
Portfolio: Corporate bonds, government securities (1-3 year maturity). Fund manager discretion on credit and duration increases.
| Fund | Expense Ratio | AUM (Rs Cr) | 1Y Return | Rank |
|---|---|---|---|---|
| HDFC Short Term Debt | 0.25% | 24,000 | 8.30% | 1 |
| ICICI Pru Short Term | 0.28% | 18,000 | 8.25% | 2 |
| Aditya Birla SL Short Term | 0.30% | 8,000 | 8.20% | 3 |
| Kotak Bond Short Term | 0.32% | 15,000 | 8.15% | 4 |
| Axis Short Term | 0.35% | 10,000 | 8.10% | 5 |
| SBI Short Term Debt | 0.35% | 12,000 | 8.08% | 6 |
Best pick: HDFC Short Term Debt (0.25%). Consistently among the lowest expense ratios with the largest AUM in the category.
Corporate Bond Funds (Direct Plans)
| Fund | Expense Ratio | AUM (Rs Cr) | 1Y Return | Rank |
|---|---|---|---|---|
| HDFC Corporate Bond | 0.25% | 28,000 | 8.25% | 1 |
| ICICI Pru Corporate Bond | 0.28% | 20,000 | 8.20% | 2 |
| Kotak Corporate Bond | 0.30% | 12,000 | 8.15% | 3 |
| Aditya Birla SL Corporate Bond | 0.32% | 9,000 | 8.12% | 4 |
| Axis Corporate Debt | 0.35% | 5,000 | 8.08% | 5 |
Banking & PSU Debt Funds (Direct Plans)
Portfolio restricted to bank and PSU bonds — lower credit risk than corporate bond funds.
| Fund | Expense Ratio | AUM (Rs Cr) | 1Y Return | Rank |
|---|---|---|---|---|
| HDFC Banking & PSU Debt | 0.22% | 8,500 | 8.00% | 1 |
| ICICI Pru Banking & PSU Debt | 0.25% | 7,000 | 7.95% | 2 |
| Kotak Banking & PSU Debt | 0.28% | 6,000 | 7.92% | 3 |
| Nippon Banking & PSU Debt | 0.30% | 4,500 | 7.88% | 4 |
| Axis Banking & PSU Debt | 0.32% | 3,000 | 7.85% | 5 |
Gilt Funds (Direct Plans)
Portfolio: 100% government securities. Zero credit risk. Return differences come from duration positioning and expense ratio.
| Fund | Expense Ratio | AUM (Rs Cr) | 1Y Return | Rank |
|---|---|---|---|---|
| SBI Magnum Gilt | 0.30% | 8,000 | 8.80% | 1 |
| ICICI Pru Gilt | 0.32% | 4,000 | 8.75% | 2 |
| HDFC Gilt | 0.35% | 3,500 | 8.70% | 3 |
| Kotak Gilt Investment | 0.38% | 2,500 | 8.65% | 4 |
| Nippon Gilt Securities | 0.40% | 1,500 | 8.58% | 5 |
Note: Gilt fund returns vary more due to duration calls (how long the bonds in the portfolio are). During rate-cut expectations, longer-duration gilt funds outperform. Expense ratio is important but secondary to duration positioning.
The AMC Expense Ratio Scorecard
Which AMC Is Cheapest Across Debt Categories?
| AMC | Avg Expense Ratio (Debt Funds) | Cheapest Category | Most Expensive Category |
|---|---|---|---|
| Parag Parikh | 0.08% | Overnight (0.05%) | N/A (limited debt range) |
| Mirae Asset | 0.12% | Overnight (0.07%) | Short Term (0.30%) |
| HDFC | 0.22% | Overnight (0.08%) | Gilt (0.35%) |
| SBI | 0.25% | Overnight (0.10%) | Credit Risk (0.45%) |
| ICICI Prudential | 0.25% | Overnight (0.10%) | Dynamic Bond (0.45%) |
| Kotak | 0.28% | Overnight (0.12%) | Credit Risk (0.50%) |
| Aditya Birla SL | 0.30% | Liquid (0.20%) | Credit Risk (0.55%) |
| Axis | 0.32% | Overnight (0.15%) | Dynamic Bond (0.50%) |
| Nippon | 0.30% | Overnight (0.15%) | Credit Risk (0.55%) |
| UTI | 0.32% | Liquid (0.20%) | Gilt (0.45%) |
Parag Parikh and Mirae Asset are consistently the cheapest across categories they operate in. HDFC offers the best combination of low cost and full category coverage.
When Expense Ratio Does NOT Matter (As Much)
Credit Risk Funds
In credit risk funds, the fund manager’s credit selection — choosing which A-rated and BBB-rated bonds to hold — matters far more than expense ratio. A fund with a 0.50% expense ratio that avoids a default delivers better returns than a 0.35% fund that holds a defaulting bond.
| Fund | Expense Ratio | 3Y CAGR | Default Events |
|---|---|---|---|
| HDFC Credit Risk | 0.50% | 8.50% | None |
| ICICI Pru Credit Risk | 0.45% | 8.30% | None |
| SBI Credit Risk | 0.45% | 8.20% | None |
| Aditya Birla SL Credit Risk | 0.55% | 7.80% | One downgrade (minor) |
| Franklin India Credit Risk* | 0.60% | — | Wound up (April 2020) |
*Franklin India Credit Risk fund is included as a reminder that in this category, credit risk management is the primary differentiator. The fund had below-average expense ratio but above-average default exposure.
Dynamic Bond Funds
Fund manager duration calls (extending or shortening portfolio maturity based on rate cycle views) drive most return variation. Expense ratio is secondary.
Action Items
For New Investments
-
Liquid/Overnight/Ultra-Short: Choose purely on expense ratio. Portfolio quality is near-identical across funds. Parag Parikh and Mirae Asset are the cheapest.
-
Short Duration/Corporate Bond/Banking & PSU: Start with expense ratio, then check portfolio quality (percentage in AAA/AA+ vs lower-rated bonds). HDFC and ICICI are the best combination.
-
Gilt/Dynamic Bond: Expense ratio matters but is secondary to duration management. SBI and ICICI have the strongest gilt fund track records.
-
Credit Risk: Expense ratio is tertiary. Focus on credit quality, concentration risk, and whether the AMC has a history of credit events. Consider whether you need this category at all.
For Existing Investments
Do NOT switch to a lower expense ratio fund if you have significant unrealized gains. Switching triggers slab-rate tax on all gains (post-April 2023 units). Calculate the breakeven:
Switching cost = Unrealized gain x 31.2% Annual savings = Investment amount x expense ratio difference Breakeven period = Switching cost / Annual savings
If breakeven exceeds 5 years, stay in your current fund. Redirect new investments to the lower-cost option.
The Simplest Strategy
If you are still choosing to invest in debt mutual funds despite the tax change, default to HDFC or ICICI Prudential debt funds in the category you need. Both offer bottom-quartile expense ratios, top-quartile AUM (scale benefits), and strong credit track records. Do not overthink it — in debt funds, the cheapest institutional-quality option wins.
Or skip debt funds entirely and use an SFB FD ladder for higher yields, or arbitrage funds for equity-level tax treatment on debt-like returns.
Expense ratios shown are approximate based on latest available disclosures from AMC websites and AMFI. TER changes frequently — verify current expense ratio before investing. Past returns do not guarantee future performance. Data as of April 2026.