Debt Mutual Fund Capital Gains Tax Calculator

Debt MF capital gains — the two eras

The Finance Act 2023 created a hard split in how debt mutual fund gains are taxed:

Purchase date	Holding	Classification	Tax
Before 1-Apr-2023	> 36 months	LTCG	20% with CII indexation
Before 1-Apr-2023	≤ 36 months	STCG	Slab rate
On/after 1-Apr-2023	Any	Slab rate	Slab rate

Pre-2023 LTCG with indexation — how it works

For units bought before 1-Apr-2023 and held more than 36 months:

Indexed cost = Purchase price × (CII of sale FY ÷ CII of purchase FY)
Capital gain = Sale proceeds − Indexed cost − Expenses
Tax          = max(0, Capital gain) × 20%

Example: Invested ₹2L in a debt fund on 1-Jun-2019 (FY 2019-20, CII = 289). Redeemed on 1-Sep-2023 (FY 2023-24, CII = 348) for ₹3L.

Indexed cost = ₹2L × 348/289 = ₹2,40,831
Gain = ₹3L − ₹2,40,831 = ₹59,169
Tax = 20% × ₹59,169 = ₹11,834

Without indexation at 30% slab, the tax would have been ₹17,750 — the indexation benefit saves ₹5,916 here.

Post-2023 purchases — slab rate

For units purchased on/after 1-Apr-2023, all gains are added to total income and taxed at your slab rate — identical to bank FD interest, except there is no TDS from the AMC.

Two-step workflow for debt fund redemptions

Before applying the tax calculation here, use the mutual fund returns calculator to determine your absolute return and pre-tax gain from NAV and units. Once you have the capital gain figure, bring it here to determine whether the pre-2023 LTCG-with-indexation rule or the post-2023 slab-rate rule applies, and compute the tax payable.

Bridges

Capital Gains Hub — equity shares, house property, or other assets? Pick the right sub-calculator
Mutual Fund Returns Calculator — compute pre-tax absolute return and CAGR from NAV-based inputs before applying the debt MF tax rate here
Income Tax Calculator — add your debt MF slab-rate gains to your gross income for full tax computation
Old vs New Regime Calculator — slab-rate gains are regime-sensitive; compare both regimes

Frequently Asked Questions

What did Finance Act 2023 change for debt mutual funds?

The **Finance Act 2023** (effective 1 April 2023) withdrew the LTCG indexation benefit for debt-oriented mutual funds. Under the new rule (§ 50AA), any units purchased **on or after 1-Apr-2023** are taxed at your **income-tax slab rate** regardless of how long you hold them. This removed the tax advantage that debt MFs had over bank fixed deposits (FDs), which are also taxed at slab rate.

I bought a debt MF before 1-Apr-2023 — what rate applies?

Units purchased **before 1-Apr-2023** retain the old rules: if held for **more than 36 months**, the gain is classified as **LTCG and taxed at 20% with CII indexation** under § 112. If held for 36 months or less, it's **STCG taxed at your slab rate**. The key date is the **purchase date** — sell date doesn't matter for determining which rule applies.

What is the 36-month threshold for debt MF? Why different from equity (12 months) and property (24 months)?

Each asset class has its own long-term threshold set by § 2(42A): **equity** (listed shares, equity MF units) = 12 months; **property** (land, building) = 24 months; **debt MF units** (pre-Apr-2023 purchases) = 36 months. This distinction no longer matters for post-Apr-2023 purchases since all such gains are slab-rate.

How does debt MF compare to a bank FD from a tax perspective?

After Finance Act 2023, the comparison is nearly identical for **post-Apr-2023 investments**: both FD interest and debt MF gains are taxed at slab rate. The key difference is that **FD interest has TDS deducted** at 10% (or 20% without PAN) by the bank, while debt MF gains are self-assessed (you pay advance tax). For **pre-2023 holdings**, debt MFs still have the indexation advantage if held > 36 months.

Does the new regime vs old regime matter for debt MF gains?

**Yes, for post-Apr-2023 gains** (and pre-2023 STCG). These are added to your total income and taxed at your slab rate — so your regime choice affects the rate. The new regime has rates of 5%, 10%, 15%, 20%, 25%, and 30%. The old regime has similar slabs but allows more deductions that can lower the effective rate. For **pre-2023 LTCG with indexation** (20% flat), the regime choice does not affect the rate.

What happens to grandfathered pre-2023 holdings if I switch to a newer fund?

Switching between funds counts as a **redemption and fresh purchase**. If you redeem a pre-Apr-2023 debt fund unit and invest in a different fund after 1-Apr-2023, the new units are **post-2023 purchases** and will be taxed at slab rate regardless of holding. The pre-2023 rules apply only to units actually purchased before that date.

Compliance disclaimer

The tax calculations on this page are based on the Income Tax Act, 1961 provisions applicable for the financial year shown. Tax laws change; always verify current provisions and consult a Chartered Accountant for filing decisions. This is educational content, not tax advice.