You set an asset allocation — say 60% equity, 30% debt, 10% gold. Then markets move it. After a strong equity run you might be at 75/15/10, carrying far more risk than you chose. Rebalancing is the act of restoring the target. It's unglamorous and it's one of the most reliable habits in investing.
Why bother
- Risk control. Drift silently raises your equity exposure right before a fall can hurt most. Rebalancing pulls it back to the level you can actually tolerate.
- Disciplined buy-low-sell-high. You trim what's run up and add to what's lagged — mechanically, without forecasting. It won't always boost returns, but it keeps risk honest and removes emotion.
How often
Two sensible approaches, best used together:
- Calendar — review once or twice a year on fixed dates.
- Threshold (band) — act only when an asset drifts beyond a band, say ±5% of its target.
Combining them — check on schedule, act only if beyond the band — avoids both neglect and over-tinkering. Rebalancing too frequently just racks up costs and taxes for little benefit.
The tax-smart way (this is the important part)
In a taxable portfolio, selling to rebalance can trigger capital gains and exit loads. Minimise that:
- Rebalance with new money first. Direct fresh SIPs and lump sums into the under-weight asset instead of selling the over-weight one. No sale, no tax — often enough to keep you near target.
- Use the ₹1.25 lakh equity LTCG exemption. When you do trim equity, keeping long-term gains within the annual exemption avoids tax on that slice.
- Prefer long-term lots (held over a year) over short-term ones (taxed at the higher STCG rate), and watch exit loads on recently bought units.
- Rebalance inside tax-sheltered or locked vehicles where you can — adjusting the equity/debt split within NPS, or leaning on EPF/PPF as your debt anchor, creates no taxable event.
Don't over-engineer it
Rebalancing is risk management, not return maximisation. A once-a-year check, acting only when something has drifted meaningfully, and using new contributions to do most of the work, is plenty for the vast majority of investors. The goal is simply to keep the portfolio behaving the way you intended — so that when a downturn comes, you're carrying the risk you signed up for, not double it.