Tax-Loss Harvesting: How to Turn Investment Losses Into Strategic Tax Savings

Brett R. Henderson, CIMA®, CPFA®, CRPS®, CEPA®, AIF®, CLU®, BFA™ · Tax Planning

Tax-loss harvesting involves selling securities at a loss for potential use against capital gains under tax rules. It is generally used in taxable accounts. Benefits depend on gains, tax rates, costs and wash-sale restrictions; savings and improved investment returns are not assured.

Key Takeaways

- Tax planning may help reduce taxes depending on individual circumstances.
- Income and deduction timing can affect tax outcomes.
- A fiduciary duty applies when providing investment advice.
- Review tax rules and transactions across accounts with your tax advisor.

What is Tax-Loss Harvesting?

Tax-loss harvesting involves selling investments below their adjusted tax basis to realize capital losses. Eligible losses can offset capital gains under applicable netting rules. This may reduce taxes, depending on the investor’s circumstances.

The strategy may be useful for investors with taxable accounts. Consider tax benefits alongside transaction costs, investment risks and the effect of replacement investments on portfolio allocation.

How Does Tax-Loss Harvesting Work?

Here is a step-by-step breakdown of how tax-loss harvesting works:

1. Identify Loss Positions: Review your taxable brokerage accounts for investments currently trading below their cost basis.
2. Sell to Realize the Loss: Sell the investment to realize the capital loss for tax reporting purposes.
3. Offset Capital Gains: Apply eligible losses under the capital-gain and loss netting rules. An additional income deduction may be available within annual limits.
4. Review Reinvestment: Evaluate replacement investments for the substantially-identical test and portfolio risks. A similar holding does not automatically comply with wash-sale rules.

What is the Wash Sale Rule?

The wash sale rule is an IRS regulation that prevents investors from claiming a tax deduction on a security sold at a loss if they purchase a substantially identical security within 30 days before or after the sale. This 61-day window (30 days before + sale day + 30 days after) is critical for IRS compliance.

A different ticker or fund name does not by itself establish compliance. Evaluate whether a replacement is substantially identical and review purchases across accounts, including dividend reinvestments, spouse purchases and IRA transactions.

Tax-Loss Harvesting Example

Hypothetical example: assumes deductible losses, no other transactions and no wash sale.

You purchased 100 shares of Stock ABC at $50/share (cost basis: $5,000)
The stock is now trading at $35/share (current value: $3,500)
You sell all shares, realizing a $1,500 capital loss
You also have $2,000 in realized capital gains from other investments
Result: Your net taxable gain is reduced to $500 ($2,000 - $1,500)

Capital Loss Deduction Rules

The IRS allows you to use capital losses in the following ways:

Offset capital gains: Losses first offset gains of the same type (short-term losses offset short-term gains first) Deduct against income: Up to $3,000 of net loss annually; $1,500 if married filing separately.
Carryforward losses: Unused losses can be carried forward indefinitely to future tax years

Short-Term vs Long-Term Capital Gains

Understanding the difference between short-term and long-term capital gains is essential for effective tax-loss harvesting:

Short-term gains: Generally, assets held one year or less; net gains taxed as ordinary income.
Long-term gains: Generally, assets held more than one year; preferential rates may apply, with exceptions.

Potential benefits depend on applicable netting rules, rates, other income and investment costs.

When Should You Consider Tax-Loss Harvesting?

Tax-loss harvesting may merit review when:

You have significant unrealized losses in taxable accounts
You have realized capital gains to offset
You are in a high tax bracket
You have equity compensation (RSUs, stock options) creating taxable events
Market volatility has created harvesting opportunities

Common Tax-Loss Harvesting Mistakes to Avoid

Violating the wash sale rule: Buying substantially identical securities within the 61-day window
Retirement accounts: Losses on holdings within an IRA or 401(k) do not create capital-loss deductions.
Ignoring transaction costs: Frequent trading can erode benefits through commissions and fees
Forgetting state taxes: Some states have different rules for capital gains treatment

How SWE90 Can Help

At Strategic Wealth Endeavor (SWE90), Brett Henderson provides comprehensive tax-aware investing strategies including:

Proactive tax-loss harvesting throughout the year
Coordination with equity compensation planning
Integration with retirement tax planning
Portfolio tax optimization aligned with your financial goals

A fiduciary financial advisor has a duty to act in your best interests when providing investment advice. Coordinate tax implementation with your tax advisor.

Frequently Asked Questions

What is tax-loss harvesting?

Tax-loss harvesting means selling investments at a loss for potential use against capital gains under tax rules. The benefit depends on your circumstances and compliance with applicable restrictions.

Is tax-loss harvesting worth it?

Potential benefits depend on usable losses, gains, tax rates and investment costs. Harvesting may defer tax rather than permanently eliminate it, and replacement investments can change portfolio risk.

Can you tax-loss harvest in an IRA or 401(k)?

Losses on holdings within an IRA or 401(k) do not create capital-loss deductions. An IRA purchase can also trigger a wash sale on a taxable-account sale; see the IRA details on page 6.

How much can you deduct from tax-loss harvesting?

Eligible losses first offset capital gains under netting rules. Up to $3,000 of remaining net loss ($1,500 if married filing separately) may reduce annual income; unused losses may carry forward.

Compliance revision: September 9, 2026. This article is educational and does not constitute tax advice. Consult a qualified tax professional for advice specific to your situation.

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Disclosure: This content is educational and is not personalized investment advice. Investing involves risk, including loss of principal. Past performance does not guarantee future results. Examples are hypothetical; individual results vary. Neither Brett Henderson nor Vanderbilt Financial Group provides tax or legal advice. Please consult with your tax and/or legal advisors regarding your personal circumstances. Brett R. Henderson is a registered representative of Vanderbilt Securities, LLC, Member FINRA, SIPC, and investment advisor representative of Consolidated Portfolio Review.

Article by Brett R. Henderson, CIMA®, CPFA®, CRPS®, CEPA®, AIF®, CLU®, BFA™ — Fiduciary Financial Advisor serving Hermosa Beach and clients where registered or exempt. Revised September 9, 2026. Advisory Services offered through Consolidated Portfolio Review.

Authoritative Sources:

Capital gains and losses: https://www.irs.gov/taxtopics/tc409 Wash sales: https://www.irs.gov/publications/p550

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Authoritative Sources

The following IRS resources support the tax-rule discussion in this article:

IRS Tax Guidelines

IRS Publication 550: investment income and expenses

IRS Publication 590-B: IRA distributions

Tax planning is not just about reducing your current tax bill—it can also help optimize your lifetime tax burden. Strategies such as Roth conversions, withdrawal sequencing, and tax-loss harvesting may help reduce taxes and preserve more of your retirement savings, depending on your individual circumstances.

How Do Different Strategies Compare?

Account considerations depend on individual circumstances Traditional IRA/401(k): Tax treatment depends on contributions and distributions. RMD start dates depend on birth year and account rules; some employer-plan exceptions apply. Roth IRA/401(k): Qualified distributions are tax-free. Neither requires lifetime RMDs for the original owner; beneficiary rules differ.

Taxable brokerage: Income and realized gains may be taxable; eligible losses follow netting rules.

HSA: Qualified medical expense withdrawals are tax-free; other withdrawals can be taxable. There is no single withdrawal order that is best for every household.

How to Create a Tax-Efficient Retirement Plan: Step-by-Step

Implementing a tax-smart strategy requires a systematic approach:

1. Step 1: Map your income sources. Identify all current and projected retirement income streams, including Social Security, pensions, 401(k)/IRA distributions, and taxable investment income.
2. Step 2: Estimate your future tax bracket. Project your retirement income to determine which federal and state tax brackets you will likely fall into, using resources from the IRS.
3. Step 3: Evaluate Roth conversions. The taxable portion increases income in the conversion year. Compare current and future taxes and other effects with your tax advisor; savings are not assured.
4. Step 4: Evaluate tax-loss harvesting. In taxable accounts, eligible losses may offset capital gains under tax rules. Review wash-sale restrictions with your tax advisor.
5. Step 5: Plan withdrawal sequencing. Compare account types, tax brackets, required distributions and spending needs. An appropriate sequence depends on your circumstances.
6. Step 6: Evaluate charitable giving. Eligible IRA owners age 70 1/2 or older may make qualifying direct charitable distributions, subject to rules and limits; these can count toward an RMD.
7. Step 7: Review annually with your financial and tax advisors. Revisit changes in law, income, account balances and goals to evaluate available planning opportunities.

Tax-efficient retirement planning may help reduce the taxes you pay throughout retirement, depending on your individual circumstances. Book your tax strategy session.

Tax-rule details and primary sources

Wash-sale and tax-planning details A wash sale can disallow a loss when substantially identical stock or securities are acquired within 30 days before or after a loss sale. The 61-day window includes the sale date. In taxable accounts, disallowed losses generally increase replacement-share basis, deferring the deduction. If your IRA or Roth IRA buys replacement shares, the loss is disallowed without an IRA basis increase; that tax loss is permanently lost. Roth qualified distributions must meet the applicable holding-period and age or other eligibility conditions. Consult your tax advisor before conversions or withdrawals. Sources checked September 9, 2026:

https://www.irs.gov/publications/p550

https://www.irs.gov/pub/irs-drop/rr-08-05.pdf

https://www.irs.gov/publications/p590b

https://www.irs.gov/publications/p969

https://www.irs.gov/retirement-plans/retirement-plan-and-ira-required-minimum-distributions-faqs