Rebalancing
How should I rebalance my portfolio?
Answer
Rebalance back to a target allocation you set deliberately, trigger it on drift rather than on the calendar, and execute it with new contributions before sales. A practical rule for most Indian portfolios is a five-percentage-point band around each asset class: act when equity or debt is more than five points from its target, rather than every quarter regardless. The order matters as much as the trigger, because selling an appreciated holding realises capital gains while directing a contribution into the underweight sleeve does not.
Why a target has to exist first
Rebalancing is meaningless without a target, and most portfolios do not have one — they have a history. The target comes from the goals the portfolio funds and their dates: a goal three years away cannot carry much equity whatever the investor's appetite, and a goal twenty years away should carry a lot. The allocation is the aggregate of those constraints.
An investor rebalancing to whatever allocation they happened to have last year is preserving an accident.
Bands beat dates
Calendar rebalancing — every quarter, every year — transacts when nothing has changed and waits when a lot has. A band triggers on the thing that actually matters: distance from target.
A five-point absolute band on each asset class is a reasonable default for a portfolio of a few asset classes. A 60/40 equity-debt portfolio rebalances when equity passes 65% or falls below 55%. In a flat year that may never trigger, which is correct: there was nothing to do. In a sharp drawdown it triggers immediately, which is the moment rebalancing does the most work and the moment a calendar rule is most likely to be three months away.
The order of operations
- New contributions. Direct monthly investment entirely into the underweight sleeve until the band closes. No sale, no tax, no transaction beyond the one already being made.
- Dividends and coupons. Anything the portfolio pays out is new money too. Reinvesting it into the underweight sleeve rather than back into its source is free rebalancing.
- Harvest losses. Where a position is at a loss, selling it realises a loss that offsets gains elsewhere, and the proceeds can be redeployed into the underweight sleeve.
- Sell gains, last and deliberately. Only when the band cannot be closed by the steps above. Prefer long-term holdings over short-term ones, stage across financial years where the drift allows, and size the sale to reach the target rather than overshoot it.
What Indian tax does to the calculation
Equity long-term capital gains are taxed at 12.5% above a ₹1.25 lakh annual exemption; short-term equity gains are taxed at 20%. Debt funds purchased after the April 2023 reclassification are taxed at slab rate with no indexation benefit.
The consequences for rebalancing are direct. Selling equity held for eleven months costs materially more than waiting a month. The annual exemption is worth using every year rather than letting gains accumulate into one large event. And a rebalance that is correct before tax can be wrong after it — which is why the order above puts sales last rather than treating them as the default instrument.
How often this actually happens
For most portfolios, a band rule triggers roughly once a year, sometimes less. That is not a sign the rule is inactive; it is the rule correctly declining to transact. The cost of rebalancing is certain — tax, spread, effort — while the benefit is a reduction in drift that only matters past a threshold. Transacting more often spends the certain cost to buy less of the uncertain benefit.
How Vestmind builds a rebalancing plan
VestStudio derives a target allocation from goals, horizon and risk capacity, then produces a plan as a sequence of moves from the current portfolio — contributions first, loss harvesting next, sales last and staged for tax. The proposed portfolio is re-analysed in full before it is recommended, so the effect on concentration and overlap is visible before anything is transacted. See the recommendations methodology.
Related questions
How often should I rebalance my portfolio?
When drift crosses a band, not on a schedule. A five-percentage-point band around each asset class means acting when equity or debt is more than five points from its target. In practice this triggers roughly once a year for most portfolios, and sometimes not at all — which is the rule working, not failing. Calendar rebalancing transacts when nothing has changed and waits when a great deal has.
Should I rebalance during a market crash?
That is when a band rule is most likely to trigger and when rebalancing does the most work: it buys the asset class that has fallen. It is also the hardest time to do it, which is the argument for having the rule written down in advance rather than deciding in the moment. The practical caution is tax and liquidity, not timing.
Does rebalancing improve returns?
Not reliably, and it should not be sold as a return strategy. In a long bull market, rebalancing out of equity reduces returns. What it reliably does is control risk: it stops a portfolio drifting into an allocation the investor never chose, which is a different and more defensible objective.
Can I rebalance without selling anything?
Usually yes, over time. Directing monthly contributions and any payouts entirely into the underweight sleeve closes most drift within a few months, with no capital gains event. Selling becomes necessary only when the drift is large relative to the contributions, or when the overweight sleeve has to shrink in absolute terms.
Sources
- Income Tax Department, Government of India — capital gains treatment
- Securities and Exchange Board of India (SEBI)
How Vestmind does this
VestStudio is Vestmind's portfolio construction product. It turns an investor's goals, horizon and risk capacity into a target portfolio, then lets them simulate a change — a new allocation, a fund switch, a rebalance — and see its effect on risk, concentration and goal funding before any money moves.