Tax-Loss Harvesting Explained

Tax-loss harvesting is an investment strategy in which securities that have declined in value are sold in order to realize a capital loss, which can then be used to offset capital gains elsewhere in a portfolio — potentially reducing taxable income in a given year.

This article provides a general educational explanation of how tax-loss harvesting works conceptually. It is not intended as personalized investment or tax advice. The appropriateness and mechanics of tax-loss harvesting depend heavily on individual circumstances, portfolio composition, and tax situation. We encourage you to consult with a qualified financial and tax professional.

The Basic Concept

When you sell an investment at a loss, that realized loss can generally be used to offset realized capital gains from other investments. If your capital losses exceed your capital gains in a given year, you may also be able to use up to $3,000 of the excess loss to offset ordinary income (as of current law), with any remaining losses carried forward to future years.

The potential tax benefit arises because it may allow an investor to effectively defer or reduce taxes on investment gains, keeping more capital working in the portfolio.

An Illustrative Example

Suppose an investor has realized $20,000 in capital gains during the year from selling an appreciated position. They also hold another investment that has declined in value, showing an unrealized loss of $15,000. By selling the declining investment, they realize a $15,000 capital loss, which can offset $15,000 of their capital gains — reducing the net taxable gain to $5,000 for that year.

This is a simplified illustration. Actual outcomes depend on the types of gains and losses involved (short-term vs. long-term), state tax rules, and other factors specific to each investor's situation.

The Wash-Sale Rule: An Important Limitation

A critical rule governing tax-loss harvesting is the IRS wash-sale rule. Under this rule, if you sell a security at a loss and then buy the same or a "substantially identical" security within 30 days before or after the sale, the loss is disallowed for tax purposes.

This means that investors who want to harvest a tax loss must either remain out of that position for 30 days, or replace it with a different investment that provides similar market exposure without being "substantially identical." What qualifies as substantially identical is a nuanced area that often benefits from professional guidance.

Tax-loss harvesting is not about generating losses for their own sake — it's about managing the timing of realized gains and losses in a tax-aware way.

Short-Term vs. Long-Term Considerations

Capital gains and losses are classified as either short-term (assets held one year or less) or long-term (assets held more than one year). Short-term gains are generally taxed at ordinary income rates, while long-term gains are generally taxed at lower preferential rates. The tax value of a harvested loss depends in part on what type of gain it is offsetting.

When Is Tax-Loss Harvesting Commonly Evaluated?

Tax-loss harvesting opportunities are often reviewed at multiple points during the year, not just at year-end. Markets can create loss opportunities at any point, and waiting until December may mean missing earlier opportunities or finding that positions have recovered. That said, year-end is a common time for advisors and investors to take stock of realized gains and losses and assess whether any remaining opportunities exist.

Limitations and Important Caveats

• Tax-loss harvesting defers, not eliminates, taxes — When you sell a loss position and replace it with a similar investment, your cost basis in the new position is lower. When you eventually sell the replacement position, you will likely recognize a larger gain. The strategy is generally about timing, not permanent tax elimination.
• Transaction costs — Selling and rebuying positions involves transaction costs, which should be weighed against the potential tax benefit.
• State taxes vary — Some states do not allow capital loss deductions or treat them differently from federal rules.
• AMT considerations — For certain taxpayers subject to the Alternative Minimum Tax, the tax benefit of harvested losses may be affected.

Tax-Loss Harvesting in a Managed Portfolio

At Pine Valley Investments, investment management is handled in-house by our internal investment committee. This structure allows for greater coordination between portfolio management decisions and each client's individual tax situation — which is relevant to strategies like tax-loss harvesting where timing and coordination matter.

We work in partnership with clients' tax professionals to ensure that portfolio decisions are made with awareness of each client's broader tax picture.