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Should You Book Unrealized Losses Just to Carry Them Forward? A Practical Look at Tax-Loss Harvesting
Investors often face a common dilemma at the end of a financial year: should you realize losses in your portfolio purely for tax purposes? The question becomes even more relevant when you are sitting on significant unrealized losses but do not have any capital gains this year to offset them against.
In such situations, many investors consider tax-loss harvesting — selling investments at a loss to realize the loss for tax purposes and carrying it forward to offset future gains. While this strategy can be beneficial in some cases, it is not always necessary or optimal.
This article explores when realizing losses makes sense, when it doesn’t, and how to think about the decision practically.
Understanding the Idea Behind Tax-Loss Harvesting
Tax-loss harvesting is a strategy where an investor realizes a capital loss by selling an investment that has declined in value. The realized loss can then be used to:
- offset capital gains in the same year, or
- be carried forward to offset future gains.
In India, capital losses can generally be carried forward for up to eight years, provided the income tax return is filed on time. This creates a potential future tax shield, allowing investors to reduce taxes when they eventually book gains.
However, whether this strategy is useful depends largely on your future expectations, transaction costs, and investment strategy.
Situations Where Booking the Losses Helps
1. You Expect Capital Gains in the Future
The most straightforward reason to harvest losses is when you believe you will realize gains in the coming years.
For example:
- You book a ₹2,00,000 capital loss this year
- Next year you sell an investment with a ₹2,50,000 gain
Instead of paying tax on the entire gain, you can offset the carried-forward loss and pay tax only on ₹50,000. Over time, this can significantly reduce your overall tax burden.
In this sense, realized losses act like a tax asset for future use.
2. Resetting the Cost Basis of an Investment
Some investors use tax-loss harvesting to reset the purchase price of an investment.
A typical approach may look like this:
- Sell the investment currently at a loss
- Immediately (or shortly after) buy it back or buy a similar investment
This allows the investor to:
- realize the tax loss today
- maintain similar portfolio exposure
- establish a new lower cost basis
If the investment later appreciates, the previously harvested loss can still be used to offset gains elsewhere.
3. You Have a Low-Income or Low-Activity Year
If you have a year with:
- minimal capital gains
- lower trading activity
- fewer taxable events
harvesting losses may still make sense. Realizing them now allows you to build a bank of losses that could be valuable in the future when gains occur.
In such cases, there is little downside to preserving the option to offset future taxes.
Situations Where Booking Losses May Not Help
1. You May Not Realize Gains Before the Carry-Forward Expires
In India, capital losses can typically be carried forward for eight years.
If you do not expect to generate meaningful gains during that time, the realized losses may never actually be used. In that case, selling investments purely for tax reasons may not deliver any real benefit.
2. Transaction Costs Could Reduce the Benefit
Every transaction comes with potential costs such as:
- brokerage fees
- bid-ask spreads
- securities transaction taxes
- exit loads in mutual funds
If the loss being harvested is relatively small, these costs may eat into the potential tax advantage, making the exercise less worthwhile.
3. Your Long-Term Investment Thesis Has Not Changed
If you believe the investment still has strong long-term potential and you are planning to hold it for many years, realizing the loss today may simply introduce unnecessary trading activity.
Sometimes the simplest approach — holding the investment until your thesis plays out — can be more aligned with long-term portfolio discipline.
4. Behavioral Risks
Tax-loss harvesting can also introduce subtle behavioral risks. Investors sometimes sell an asset to capture the loss but fail to re-enter the position, especially if markets rebound quickly.
In such cases, a tax strategy could unintentionally lead to missing out on future gains, which may cost far more than the tax saved.
A Practical Rule of Thumb
Many investors consider harvesting losses when:
- the losses are meaningful,
- transaction costs are low,
- they expect gains within the next few years, and
- they can maintain portfolio exposure after selling.
On the other hand, it may not be worth doing if:
- the losses are small,
- trading costs are significant, or
- future capital gains are unlikely.
The Bottom Line
Tax-loss harvesting can be a useful tool, but it should not drive investment decisions on its own. Realizing losses simply to create a tax benefit only makes sense if those losses are likely to offset future gains and the strategy does not disrupt your long-term investment plan.
In most cases, the best approach is to treat tax-loss harvesting as a supporting tactic within a broader portfolio strategy, rather than as the primary reason for buying or selling investments.
