Tax-Loss Harvesting Beyond the Basics

September 8, 2026
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Tax-loss harvesting is often described simply: sell an investment that has declined, realize the loss and use that loss to offset taxable investment gains. For sophisticated investors, however, effective tax-loss harvesting requires a much broader view.

The goal should not be to generate losses for their own sake. Instead, tax-loss harvesting can be used to improve the tax efficiency of a portfolio while supporting investment, diversification and long-term wealth planning objectives.

Look at Gains and Losses Together

Capital losses can offset capital gains, making tax-loss harvesting particularly valuable during years when an investor has realized significant gains. If total capital losses exceed total capital gains, individuals can generally use up to $3,000 of the remaining net capital loss against ordinary income, with additional losses carried forward to future years.

But today’s tax savings are only one consideration. Selling an investment also changes the portfolio. Before realizing a loss, investors should consider whether the position still fits their strategy and what will replace it.

This can create an opportunity to address concentrated positions. For example, losses elsewhere in a portfolio may help offset gains generated while reducing exposure to a highly appreciated stock. Rather than viewing tax-loss harvesting as an isolated year-end exercise, it can become part of a broader diversification strategy.

Be Careful With the Wash-Sale Rule

Investors who want to maintain market exposure must navigate the wash-sale rule. Generally, a loss can be disallowed if substantially identical securities are purchased within 30 days before or after the loss-generating sale.

This can become complicated when an investor has multiple brokerage accounts, automatic investment programs or retirement accounts. Transactions involving a spouse can also create wash-sale issues.

Instead of immediately repurchasing the same security, an investor may consider another investment that provides similar market exposure without being substantially identical. The objective is to remain aligned with the investment strategy without inadvertently losing the intended tax benefit.

Coordinate Harvesting With the Bigger Tax Picture

Tax-loss harvesting is most effective when coordinated with the rest of the financial plan. Investors should consider upcoming liquidity needs, expected future income, charitable giving, business transactions and other events that could generate taxable gains.

It is also important to distinguish between short-term and long-term gains and losses because their tax treatment differs. A strategy that creates an immediate tax benefit may be less attractive if it leads to unnecessary trading, changes the portfolio’s risk profile or simply postpones a larger tax liability.

For high-net-worth investors, tax-loss harvesting should ultimately be an investment decision informed by taxes, not a tax decision that overrides investment fundamentals.

At Illumination Wealth, we help clients evaluate tax opportunities within the context of their complete financial picture. Coordinating investment management with tax strategy can help turn market volatility into thoughtful planning opportunities while keeping long-term objectives at the center of the decision. Contact us today to work with one of our experienced financial advisors on your business tax strategies.