How Active Loss Harvesting Works & Doesn't Work: Trust & Estate Planning

9/29/2026 - By Michael Cole, JD, MSPA & Stacey Craig, CPA

Active tax-loss harvesting is often presented as a simple year-end strategy: sell investments that are down, use the losses to offset gains, and reinvest in something similar enough to preserve market exposure. In the right circumstances, that can be effective. But the strategy is far more nuanced than it first appears, especially in the trust and estate context.

For individuals, trusts, and estates, the value of harvesting depends on whether the losses can actually be used, whether the wash sale rules can be avoided, and whether the taxpayer is likely to benefit from carryforwards before death or termination. In many cases, harvesting creates real tax value. In others, it produces little more than administrative complexity or a deferred benefit that may never be realized.

Below is a practical overview of how active loss harvesting works, where it breaks down, and why it can be especially important, or especially limited in trust and estate planning.

What Active Loss Harvesting Is

Active loss harvesting is the deliberate realization of capital losses by selling securities that have declined in value, usually while reinvesting in similar but not substantially identical positions to preserve market exposure.

Its tax value comes primarily from two sets of rules:

  • Capital loss limitation rules
  • Wash sale rules

For noncorporate taxpayers, capital losses are generally allowed only to the extent of capital gains, plus up to $3,000 of excess losses each year against ordinary income. Excess losses generally carry forward. That means harvesting is most valuable when the taxpayer has current gains, expects future gains, or has enough time to use the carryforward.

At the same time, the wash sale rules can defer the loss if the taxpayer acquires substantially identical stock or securities within the 61-day window surrounding the sale. If that happens, the loss is generally not currently deductible and instead is added to the basis of the replacement property.

So the basic objective is straightforward: realize losses that are actually usable, while avoiding transactions that defer those losses under the wash sale rules.

How Active Loss Harvesting Works

Offsetting Capital Gains

The most obvious benefit of harvesting is that realized capital losses offset realized capital gains that otherwise would be taxable. If losses exceed gains, a noncorporate taxpayer may generally use up to $3,000 of the excess against ordinary income each year, with the remainder carried forward.

This makes harvesting especially useful where the taxpayer has:

  • Current-year capital gains,
  • Expected future gains,
  • Concentrated appreciated positions that may be sold later,
  • Portfolio turnover likely to generate gains.

In those situations, harvesting can reduce current tax liability or create carryforwards that remain useful in later years.

Preserving Market Exposure

Harvesting does not require abandoning an investment strategy. In many cases, the taxpayer can sell a loss position and reinvest in a similar but not substantially identical investment.

That is why harvesting often involves:

  • Selling one issuer and buying another in the same industry,
  • Selling one fund and buying a comparable but different fund,
  • Waiting out the wash sale period before repurchasing the original position.

The strategy works best when the taxpayer can preserve economic exposure without crossing the line into substantially identical replacement property.

Creating Carryforwards

Another benefit is that excess capital losses generally carry forward during life for noncorporate taxpayers. Those carryforwards retain their character as short-term or long-term losses, which can matter in future netting.

That means harvesting can still be worthwhile even if the taxpayer does not use all of the losses immediately, provided there is a realistic expectation of future gains or enough time to use the carryforward.

How Active Loss Harvesting Does Not Work, or Works Poorly

Wash Sale Problems

The most common reason harvesting fails is the wash sale rule. If the taxpayer buys substantially identical stock or securities within 30 days before or after the sale, the loss is generally disallowed currently.

In that case, the loss is usually deferred rather than permanently lost, because it is added to the basis of the replacement property. But that defeats the immediate purpose of harvesting.

This issue can arise not only through direct repurchases in the same account, but also through:

  • Automatic dividend reinvestments
  • Purchases in another taxable account
  • Options or contracts to reacquire
  • Especially repurchases in an IRA

IRA repurchases are a particularly harsh trap because the disallowed loss is not preserved in a practically useful way through IRA basis.

Limited Gain Capacity

Harvesting also works poorly when the taxpayer has little or no capital gain capacity. If there are no current gains and no meaningful future gains expected, the taxpayer may be left using only the annual $3,000 offset against ordinary income.

In that setting, the economic value of harvesting may be modest relative to transaction costs, portfolio disruption, and administrative burden.

Deferral Rather Than Permanent Savings

Loss harvesting is often a timing strategy, not a permanent tax elimination strategy. Selling a loss asset and reinvesting in a replacement asset may preserve market exposure, but it can also reduce the portfolio’s basis. If the replacement investment later appreciates and is sold, some of the earlier tax benefit may effectively reverse.

That does not mean harvesting lacks value. It often still provides deferral, rate arbitrage, or planning flexibility. But it is important not to overstate the benefit as permanent tax savings in every case.

Poor Fit Near Death

Harvesting may also be less useful where the taxpayer is likely to hold appreciated assets until death and receive a basis adjustment under section 1014, while any unused capital loss carryovers lapse at death.

That creates an important asymmetry:

  • Unrealized appreciation may disappear through basis step-up at death
  • Unused capital loss carryovers generally do not pass to heirs

As a result, aggressive harvesting late in life may produce little benefit if the taxpayer is unlikely to use the losses before death.

Why Trust and Estate Planning Changes the Analysis

The trust and estate context makes loss harvesting more complicated, and often more strategic because the rules for using and preserving losses differ depending on whether the taxpayer is an individual, a nongrantor trust, an estate, or a beneficiary.

Loss Harvesting in Nongrantor Trusts

A nongrantor trust is generally treated as a noncorporate taxpayer for capital loss purposes. That means it can:

  • Offset capital gains
  • Offset limited ordinary income
  • Carry forward excess capital losses

Because trusts reach high tax brackets quickly, harvesting can be especially useful where the trust has realized gains from portfolio turnover, diversification, or sales of appreciated assets.

But the same limitations apply: if the trust has little gain capacity, the value of harvesting may be limited.

Trust Termination Planning

One of the most important trust-specific planning opportunities arises when a nongrantor trust is expected to terminate.

If the trust terminates with unused capital loss carryovers, those losses may pass out to the beneficiaries succeeding to the trust property and retain their character in the beneficiaries’ hands.

That can make harvesting particularly attractive where:

  • The trust itself cannot fully use the losses
  • Termination is expected soon
  • Beneficiaries are likely to have capital gains against which the losses can be used

In that setting, harvesting can convert otherwise trapped trust-level losses into beneficiary-level tax attributes.

Loss Harvesting in Estates

Estates can also benefit from active loss harvesting during administration.

An estate may realize capital gains as part of:

  • Portfolio repositioning
  • Liquidity planning
  • Sales of concentrated holdings
  • Administration-related asset sales

Harvested losses can offset those gains. If unused losses remain when the estate terminates, they may pass through to beneficiaries under the termination rules.

Post-Death Declines in Value

A particularly useful estate-planning application arises where assets receive a basis adjustment at death and then decline in value during administration.

In that case, the estate may be able to harvest post-death losses based on the stepped-up basis. This can be an effective way to monetize market declines occurring after death without sacrificing the basis adjustment already obtained.

That makes estate administration a distinct planning window: the decedent’s pre-death losses may expire unused, but the estate’s own post-death losses may still be harvested and used.

When Harvesting Is Especially Useful in Trust and Estate Planning

Active loss harvesting tends to be most effective in the following trust and estate situations:

  • Trusts Near Termination: If a nongrantor trust is expected to terminate and has unrealized losses, harvesting before termination may create carryovers that can pass to beneficiaries if unused at the trust level.
  • Estates With Expected Capital Gains: If an estate expects gains from liquidation, diversification, or administration-related sales, harvesting can offset those gains during the administration period.
  • Post-Death Market Declines: If assets decline after receiving a basis adjustment at death, harvesting can capture those post-death losses for the estate.
  • Beneficiaries With Gain Capacity: Where beneficiaries are expected to receive terminating-trust or terminating-estate loss attributes and have capital gains of their own, harvesting may create meaningful downstream tax value.

When Harvesting Is Less Useful

Harvesting is often less compelling in these situations:

  • Taxpayers Unlikely to Use the Losses Before Death: If an elderly or terminally ill taxpayer has limited gain capacity and is unlikely to survive long enough to use the losses, harvesting may produce little practical benefit because unused losses generally lapse at death.
  • Assets Likely to Be Held Until Death: If the plan is to hold appreciated assets until death and rely on basis step-up, harvesting losses may simply create carryforwards that never become useful.
  • Trusts or Estates With Little Gain Capacity: If there are no meaningful gains to offset and no realistic path for losses to pass out on termination, harvesting may have limited value.
  • Transactions With Wash Sale Exposure: If the taxpayer is likely to repurchase substantially identical securities, or do so indirectly through another account or IRA the intended harvesting benefit may be lost.

Practical Considerations Before Harvesting

Before implementing an active harvesting strategy, especially for trusts and estates, it is worth asking:

  • Does the taxpayer have current or expected capital gains?
  • Is there enough time to use carryforwards?
  • Is death or trust termination likely before the losses can be used?
  • Could the losses pass to beneficiaries on termination?
  • Are replacement investments clearly outside wash sale territory?
  • Are there IRA or related-account purchases that could taint the loss?
  • Is the strategy producing real tax value, or just deferral with added complexity?

These questions often determine whether harvesting is worthwhile.

Final Takeaway

Active loss harvesting can be a powerful planning tool, but only when the losses are actually usable and the wash sale rules are carefully managed.

For individuals, the strategy works best when there are current or future gains to offset and enough time to use carryforwards. It works poorly when gains are absent, replacement purchases trigger wash sale treatment, or losses are likely to expire unused at death.

For trusts and estates, the analysis is even more fact-specific. Harvesting can be especially effective:

  • Inside estates during administration,
  • Terminating nongrantor trusts where losses may pass to beneficiaries,
  • Where post-death declines in value create fresh loss opportunities.

But it can be far less effective where losses are unlikely to be used before death or where the taxpayer is relying primarily on basis step-up planning.

In short, active loss harvesting is not just an investment tactic. In the trust and estate setting, it is a timing, carryforward, and succession-planning issue, and its success depends as much on the taxpayer’s life cycle and entity structure as on the market itself.

Turn Tax-Loss Harvesting Into a Strategic Planning Opportunity

Tax-loss harvesting can help reduce taxes, but its value depends on much more than market performance. For individuals, trusts, and estates, the timing of gains, the wash sale rules, and the ability to use capital loss carryforwards can significantly impact the outcome.

Whether you're managing a trust, administering an estate, or reviewing your personal investment strategy, proactive planning can help ensure tax-saving opportunities aren't missed. Connect with our tax and trust professionals to evaluate whether an active tax-loss harvesting strategy aligns with your estate planning and long-term financial goals.

About the Authors

Michael Cole, JD, MSPA

Michael is a partner with experience across tax, accounting, and advisory services. He began his career in public accounting over 15 years ago, focusing on tax consulting and compliance. His primary areas of experience include providing services related to mergers and acquisitions, 704(b) allocations, and complex transaction structuring for private equity firms and family offices.

Stacey Craig, CPA

Stacey is a partner with experience across tax compliance, planning, and consulting services. Stacey is a trusted tax advisor known for delivering clear, strategic guidance that helps clients make confident financial decisions. With more than two decades of experience in tax compliance, planning, and consulting, she brings deep expertise to partnerships, S corporations, nonprofits, high-net-worth individuals, trusts, and estates.

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