You built your portfolio with a plan: 70% equity, 30% debt. A year later, equity has delivered 22% returns and debt has delivered 7%. Without any action from you, your allocation has drifted to 76% equity and 24% debt. You are now taking more risk than you intended — without realising it. As you get closer to a financial goal, this drift becomes increasingly dangerous. A market correction at the wrong time can permanently shrink the corpus you spent years building. Rebalancing is the act of bringing your portfolio back to its intended allocation. This post explains what it is, when to do it, how to do it in an Indian tax context, and gives you a practical checklist.
01 — Why Portfolios Drift
Portfolio drift happens because different asset classes grow at different rates. Equity markets, especially in India, can deliver 15–25% in a strong year. Debt instruments — fixed income mutual funds, FDs, bonds — deliver 6–9%.
If your portfolio starts at 70:30 (equity:debt) and equity returns 20% while debt returns 7%:
| Asset | Starting Value | Return | Year-End Value |
|---|---|---|---|
| Equity (70%) | ₹7,00,000 | 20% | ₹8,40,000 |
| Debt (30%) | ₹3,00,000 | 7% | ₹3,21,000 |
| Total | ₹10,00,000 | ₹11,61,000 |
New allocation: Equity = 72.4%, Debt = 27.6%. This doesn't look alarming — but compound this over 3–5 bull market years and you could easily end up at 85–90% equity without ever consciously making that choice.
02 — The Risk of Not Rebalancing Near a Goal Date
The closer you are to a financial goal — retirement, child's education, house down payment — the more dangerous unmanaged equity overexposure becomes.
Scenario: You have ₹50 lakh saved for your child's college admission in 2 years. Your portfolio has drifted to 80% equity. The market drops 35% — not unusual; the Nifty fell 38% in 2020 in two months. Your corpus falls to ₹38 lakh. The college fee is ₹45 lakh. You have a shortfall, and no time to recover.
If you had rebalanced to 30% equity / 70% debt 2 years before the goal, the same crash would have brought your corpus to approximately ₹46.5 lakh — still enough to meet the goal.
The cost of not rebalancing is not abstract. It can mean missing a goal entirely.
03 — Two Approaches to Rebalancing
Time-Based Rebalancing
Review and rebalance at fixed intervals — typically once a year, often aligned with the financial year end (March) or your portfolio anniversary.
Pros: Simple, predictable, prevents over-trading. Cons: May miss significant drift between review dates.
Best for: Long-term goals (10+ years away) where the portfolio can tolerate occasional drift.
Trigger-Based Rebalancing
Rebalance when any asset class drifts more than a defined threshold from its target — typically 5–10% absolute deviation.
Example: Target is 70% equity. If equity drifts above 78% or below 62%, you rebalance.
Pros: Responds to actual market conditions, not calendar. Cons: Requires more active monitoring.
Best for: Portfolios approaching a goal (within 5–7 years) where allocation precision matters more.
Which Should You Use?
Use time-based rebalancing for goals that are more than 7–8 years away. Switch to trigger-based rebalancing (with tighter bands) as you get within 5 years of the goal.
04 — Tax Implications of Rebalancing in India
Rebalancing requires selling overweighted assets and buying underweighted ones. In India, this selling event has tax consequences.
Equity Mutual Funds
| Holding Period | Tax Rate | Notes |
|---|---|---|
| Less than 12 months | 20% (STCG) | Short-term capital gains |
| More than 12 months | 12.5% on gains above ₹1.25 lakh | Long-term capital gains (LTCG) |
Debt Mutual Funds
Debt mutual fund gains (regardless of holding period, post April 2023 amendment) are taxed at your income tax slab rate.
Tax-Efficient Rebalancing Strategies
Strategy 1: Rebalance through new contributions Instead of selling overweighted equity, direct all new SIP contributions temporarily to the underweighted debt funds. This achieves rebalancing without triggering a tax event.
Strategy 2: Use annual LTCG exemption You can realise up to ₹1.25 lakh in LTCG per year tax-free. If your required rebalancing involves equity gains within this limit, the tax cost is zero.
Strategy 3: Use retirement accounts for rebalancing NPS allows internal rebalancing (switching between E, C, G allocations) without tax implications. Use this first before rebalancing in taxable accounts.
Strategy 4: Harvest losses If some equity funds are at a loss, sell them to book the loss (which offsets gains), then reinvest in the same category. This reduces your tax liability and restores target allocation simultaneously.
05 — Rebalancing in the Context of Goal-Based Planning
Different goals have different rebalancing requirements:
| Goal Timeline | Rebalancing Frequency | Trigger Threshold |
|---|---|---|
| More than 10 years | Once a year | 10% drift |
| 5–10 years | Once a year | 7% drift |
| 3–5 years | Twice a year | 5% drift |
| 1–3 years | Quarterly | 3% drift |
| Less than 1 year | Monthly review | Move to debt/liquid |
The pattern is: the closer you are to the goal, the more frequently you monitor and the tighter your rebalancing bands.
06 — Practical Rebalancing Checklist
Use this checklist once a year, or when you suspect significant drift:
Step 1: Record current allocation List all funds, their current value, and calculate each fund's percentage of total portfolio.
Step 2: Compare to target allocation Write down your target allocation (set when you created the goal). How far has each asset class drifted from the target?
Step 3: Calculate rebalancing trades Determine how much to sell from overweighted classes and how much to buy in underweighted classes.
Step 4: Check tax implications Before selling, calculate gains on the units to be redeemed. Assess whether the tax cost is justified, or whether you can use new contributions to rebalance instead.
Step 5: Execute trades Sell overweighted assets and buy underweighted assets. If using new contributions to rebalance, redirect SIPs temporarily.
Step 6: Verify and record After trades settle, verify that the new allocation matches the target. Record the date and new allocation for next year's review.
Step 7: Adjust target allocation if goal timeline has changed If the goal is now 5 years away instead of 8, your target allocation should be updated. Rebalancing and glide-path adjustment should happen in the same review.
Bottom Line
Rebalancing is not a complex activity — it is a disciplined one. Your portfolio will drift without it, and the longer you ignore it, the more risk you accumulate silently. For goals more than 10 years away, once-a-year rebalancing is enough. For goals within 5 years, rebalance more frequently and tighten the bands. Use tax-efficient strategies — new contributions first, LTCG exemption next, loss harvesting where relevant — to minimise the tax cost of rebalancing. The goal of rebalancing is not to maximise returns. It is to ensure the risk you carry matches the risk you intended to take at every stage of your investment journey.
Disclaimer: This article is for educational purposes only and does not constitute financial advice. Mutual fund investments are subject to market risks. Tax laws are subject to change. Please consult a SEBI-registered financial advisor and a tax professional before making investment or rebalancing decisions.
About the Author
Hariprasath Loganathan NISM-Certified MF Distributor | Foundation Wealth
I am a certified financial expert on Mutual Funds, NPS, and Fixed Deposits. My approach is simple — educate first, plan next. I believe that when you understand why you're investing, you stay committed through market ups and downs. I combine structured financial literacy with personalised, goal-based investment planning.
Educate. Plan. Grow.
📧 hariprazath@gmail.com 📞 +91 9944060203 🌐 https://foundationwealth.in