How and When to Rebalance Your Mutual Fund Portfolio
Portfolios drift over time — here's how to rebalance your mutual fund portfolio, when to do it, and why even a 5–10% allocation shift can hurt long-term re
You set up your SIPs, watched the numbers grow, maybe even used our SIP calculator to map out a 10-year plan. But here’s what most people skip: portfolios drift. The mix you started with isn’t the mix you have today — and that gap matters more than most investors realise.
Rebalancing is just the act of bringing your portfolio back to the allocation you originally intended. It sounds simple, but the when and how trips people up constantly.
Why Your Portfolio Drifts in the First Place
Say you started two years ago with a 70/30 split — ₹70,000 in equity mutual funds and ₹30,000 in debt funds. Equity markets have had a strong run since then, so today your equity portion might be worth ₹1,05,000 while your debt sits at ₹36,000. That’s now roughly an 85/15 split.
You didn’t do anything wrong. The drift happened automatically because equity grew faster. But now you’re carrying significantly more risk than you planned for — and you may not even know it.
The problem isn’t growth. The problem is that your original allocation was based on your actual risk tolerance, your timeline, and your life goals. That hasn’t changed just because the Sensex ran up.
The Two Triggers That Actually Matter
Most finance content gives you a laundry list of reasons to rebalance. Ignore most of it. There are really only two triggers worth acting on.
Trigger 1: Your allocation drifts by more than 5–10 percentage points.
If your target is 70% equity and you’re now at 82%, that’s a meaningful shift. You’re no longer invested the way you intended. Check your portfolio on Groww, Kuvera, or Zerodha every six months — not every week, but not once in three years either.
Trigger 2: Your life situation changes.
Getting married, buying a flat in Pune with a ₹60 lakh home loan, having a child, switching jobs — any of these should prompt a fresh look. A 28-year-old with no dependents can afford more equity volatility than a 36-year-old with a ₹45,000/month EMI and a toddler.
Time-based rebalancing — doing it every January regardless of what’s happened — is fine as a habit, but drift-based rebalancing is smarter. Only act when the numbers actually call for it.
How to Actually Do It: Two Practical Methods
Method 1: Redirect new money.
This is the cleanest approach for most salaried investors. Instead of selling anything, you pause or reduce your SIP into the over-weighted fund and increase contributions to the under-weighted one.
Example: Priya earns ₹85,000/month in Hyderabad and invests ₹17,000 through SIPs — ₹12,000 in a large-cap equity fund and ₹5,000 in a short-duration debt fund. After 18 months of strong equity returns, she’s drifted to 80% equity. Rather than redeeming units, she temporarily shifts her SIP to ₹9,000 equity and ₹8,000 debt until the ratio normalises. No selling, no tax event, no exit load headache.
Method 2: Sell the over-performing fund and buy the lagging one.
This makes sense when the drift is large — say 15+ percentage points — or when you’re doing a lump sum correction. But here, tax and exit load matter enormously.
If Priya had invested in an equity fund and held it for more than one year, gains above ₹1 lakh in a financial year attract LTCG tax at 10% — that’s Long-Term Capital Gains tax, the tax you pay when you sell investments held over a year. If she’s selling units she’s held for less than a year, it’s STCG at 20% — Short-Term Capital Gains, taxed at a higher rate because SEBI and the Income Tax Act treat short holding periods less favourably.
This is why Method 1 — redirecting SIPs — is usually better for smaller imbalances. You avoid triggering a taxable event entirely.
| Method | Tax Impact | Best For | Effort |
|---|---|---|---|
| Redirect SIPs | None | Drift under 10–12% | Low |
| Partial redemption | LTCG/STCG applies | Drift over 15% | Medium |
| Full switch | LTCG/STCG + exit load | Major life change or overhaul | High |
One Thing to Stop Doing
Don’t rebalance because the market is scary. Selling equity funds in a correction to “protect yourself” and planning to buy back later is market timing — and it almost always costs you returns. Rebalancing is about maintaining your planned allocation, not reacting to headlines.
If your equity is down 20% and you’re now at 60% equity instead of 70%, your portfolio has actually rebalanced itself the wrong way — and the right move might be to add equity, not remove it.
The discipline is in sticking to the plan. The portfolio you designed when you were calm is almost always better than the decisions you make when markets are moving.
Frequently Asked Questions
How often should I rebalance my mutual fund portfolio?
Check your allocation every six months, but only rebalance if it has drifted by more than 5–10 percentage points from your target. Doing it more frequently creates unnecessary tax events and transaction costs without meaningfully improving outcomes.
Does rebalancing mutual funds attract tax in India?
Yes, if you redeem units to rebalance. Equity fund units held over one year attract LTCG tax at 10% on gains above ₹1 lakh. Units sold within a year attract STCG at 20%. Redirecting your SIP contributions instead of selling is a cleaner, tax-free alternative for smaller corrections.
What is a good equity-to-debt ratio for a 30-year-old Indian investor?
A commonly used starting point is 70–80% equity and 20–30% debt for someone in their late 20s to mid-30s with a stable income and a 10+ year horizon. But this shifts based on your EMIs, dependents, and how you’d actually behave if your portfolio dropped 30% in a year.
Can I rebalance within ELSS funds without losing my 80C benefit?
No — once you invest in an ELSS fund (Equity Linked Savings Scheme, the mutual fund category that qualifies for ₹1.5 lakh deduction under Section 80C), there’s a 3-year lock-in per SIP instalment. You cannot redeem before that to rebalance. Factor this illiquidity in when you’re deciding how much of your portfolio to put into ELSS.
Is there a right time of year to rebalance?
There’s no universally perfect month, but March is a poor time to trigger large redemptions — you’re close to the financial year end and may push yourself into a higher tax bracket. April to June, after the new financial year begins, gives you a clean slate for tracking gains under the ₹1 lakh LTCG exemption threshold.