Tax: the Second Silent Drag
TER is the drag you never see; tax is the one you only see at exit — the last subtraction before the return is actually yours.
Why you care
The map keeps saying "the number that matters is what you keep" — and TER isn't the last subtraction. Tax is. It never shows up on a factsheet, every return you've ever been quoted is pre-tax, and the rules differ sharply by fund type and holding period. A plan built on pre-tax numbers is built on money that isn't all yours.
Run the numbers
₹3 lakh gain after 3 years (illustrative — verify current rates): in an equity fund, LTCG tax is ~₹22,000 (12.5% beyond the ₹1.25 lakh exemption). The same gain in a debt fund at a 30% slab: ₹90,000. Same gain, four times the tax — decided entirely by which box the fund sits in.
Where this goes
Why you care
Every return in this map so far — gross, net of TER, CAGR, XIRR — has one thing in common: it is pre-tax. The factsheet's returns are pre-tax. Your app's XIRR is pre-tax. But the rupees you can actually spend are post-tax, and the gap between the two is decided by rules that differ sharply by fund type and holding period.
This node is the mirror of TER, which is why it lives in the cost stack. TER is skimmed daily and you never see it; tax arrives once, at redemption, and you can't miss it. Broadly (rates as per current Finance Act — verify at fact-check): equity funds enjoy the gentlest regime. Long-term gains (held over a year) are taxed at 12.5% beyond a ₹1.25 lakh annual exemption, short-term at 20%. Debt funds lost their advantage in April 2023: gains are now taxed at your slab rate, with no indexation, however long you hold. Hybrids sit in between depending on their equity share. The practical consequence: two funds with identical pre-tax returns can leave meaningfully different amounts in your pocket, and the difference compounds with your tax bracket.
Run the numbers
₹10 lakh invested, redeemed after 3 years with a ₹3 lakh gain, investor in the 30% slab (illustrative — verify current rates):
| Equity fund | Debt fund | |
|---|---|---|
| Gain | ₹3,00,000 | ₹3,00,000 |
| Regime | LTCG 12.5% above ₹1.25 L exemption | Slab rate, no indexation |
| Tax | (3,00,000 − 1,25,000) × 12.5% ≈ ₹21,875 | 3,00,000 × 30% = ₹90,000 |
| Kept | ₹2,78,125 | ₹2,10,000 |
Same fund performance, same holding period — and the debt-fund investor keeps ₹68,000 less, purely because of the box the fund sits in. Now stack the drags: the TER already took its slice every day on the way, and tax takes its slice at the door. The return you plan your life around has to survive both.
Where this goes
Tax is the final subtraction, so it lands directly on the investor's realised XIRR — a serious tracker computes it on post-tax proceeds, after any exit load too. It also quietly reshapes behaviour across the map: the equity/debt tax gap changes what debt funds are for, and holding periods cluster around the long-term thresholds. Churning a portfolio means paying the tax meter each time compounding restarts. One caution: these rates change with nearly every budget. The structure (equity gentle, debt at slab, exemptions with thresholds) is the thing to remember — the current Finance Act is the thing to check.