Taxes

Does Tax-Loss Harvesting Apply to Me and When Should I Do It?

By
Alexander Harmsen
Alexander Harmsen is the Co-founder and CEO of PortfolioPilot. With a track record of building AI-driven products that have scaled globally, he brings deep expertise in finance, technology, and strategy to create content that is both data-driven and actionable.
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Does Tax-Loss Harvesting Apply to Me and When Should I Do It?

Why This Matters: Not every investment strategy is right for everyone, but tax-loss harvesting can make a real difference when the timing and circumstances are right. Whether you’ve had a successful year of gains, there’s some natural market volatility, or you’re holding onto investments that aren’t performing as you hoped, this approach can help you manage your taxes and keep your portfolio on track.

In this article, we’ll explore how to decide if tax-loss harvesting is right for you, the best times to use it, and how to get started.

PortfolioPilot guide on whether tax-loss harvesting applies to you and the best times to use it, highlighting key benefits, timing strategies, and its effectiveness for taxable accounts and high-income earners.

Let’s Answer the Big Question: “Does Tax-Loss Harvesting Apply to Me?”

Here’s a straightforward way to determine if tax-loss harvesting is a good fit for your situation. Just two questions:

  1. Do You Have a Taxable Investment Account?
    Tax-loss harvesting only works in taxable accounts. If all of your investments are in IRAs or 401(k)s, this strategy won’t apply because those accounts are tax-deferred.
  2. Do You Have Underperforming Investments?
    If you hold securities that are “underwater” from when you originally bought them, you could sell them at a loss. Holding onto investments that have lost value can drag your portfolio down. Selling them strategically lets you claim the loss for tax purposes and reinvest in something with better potential.

It’s even more useful if you:

  1. Have Realized Gains This Year
    If you’ve sold investments for a profit, tax-loss harvesting can help offset those gains, reducing how much tax you owe. Though, even if you don’t have any realized gains this year, the first $3,000 in losses can be used to offset income, and losses can be carried forward to future years indefinitely.
  2. Are in a High Tax Bracket
    Higher income often means higher capital gains tax rates, so the potential savings from tax-loss harvesting are bigger. That said, even in lower brackets, this strategy can still add value.

Quick Tip: Personalization matters. Studies, like this from Financial Analysts Journal, show that tax-loss harvesting outcomes are highly individual - so it’s essential to align the strategy with your financial situation.

2nd Quick Tip: Don’t wait for the end of the year to take advantage of tax-loss harvesting. Because of natural market volatility, tax-loss harvesting opportunities often emerge throughout the year - many of which will be gone if you only look for them once at the end of the year.

Timing Is Everything: When Should You Do Tax-Loss Harvesting?

The timing of tax-loss harvesting is important. Here are some situations where it can make the biggest impact:

  • After Realizing Gains: If you’ve sold a winning investment, using losses to offset those gains is a smart way to lower your tax bill.
  • During Market Volatility: Downturns can be tough, but they also present opportunities to sell underperforming investments and reinvest at lower prices
  • When Rebalancing Your Portfolio: If you’re adjusting your portfolio to maintain your target allocation, pairing it with tax-loss harvesting can make the process even more effective.
  • Before Tax Deadlines: While tax-loss harvesting is a year-round strategy, December is often the last chance to act before filing taxes.

Practical (Hypothetical) Example

Let’s look at Carlos, an investor managing his portfolio. Earlier this year, Carlos sold shares of Stock A for a $15,000 profit. At the same time, he holds Stock B, now worth $9,000, which he originally bought for $14,000. That’s a $5,000 unrealized loss.

Since Carlos has a taxable account and is in a high tax bracket, he decides to sell Stock B to realize the $5,000 loss. This reduces his taxable gain from $15,000 to $10,000, saving him $1,000 in taxes at a 20% capital gains tax rate. He reinvests the proceeds from Stock B into a similar ETF, maintaining his portfolio’s exposure to growth potential.

Why It Works:
Carlos’s decision to harvest losses applies because:

  • He has realized gains that can be offset.
  • He holds an underperforming investment with a significant unrealized loss.
  • His high tax bracket makes the savings more impactful.
  • Reinvesting strategically ensures his portfolio remains balanced and growth-focused.

Avoid These Common Pitfalls

Even a strong strategy like tax-loss harvesting has its challenges. Be sure to watch out for:

  1. Breaking the Wash Sale Rule: If you buy back the same or a “substantially identical” investment within 30 days before or after the sale, the IRS disqualifies your loss. Plan trades carefully. (Read more about it in this article)
  2. Focusing Only on Taxes: While tax savings are great, your overall investment strategy should take priority.
  3. Underestimating Transaction Costs: Frequent trading can add up. Make sure the tax savings are worth it.

How to Get Started

Here’s a simple plan to start:

  1. Review Your Portfolio:
    Look for investments with unrealized losses and realized gains in taxable accounts.
  2. Estimate Your Savings:
    Use calculators or tools like PortfolioPilot.com to figure out how much you can save.
  3. Plan Strategic Trades:
    Identify which investments to sell and find suitable replacements to keep your portfolio balanced.
  4. Stay Proactive:
    Regularly review your portfolio to catch opportunities as they arise.

Practical Tip: Technology can make this easier. Platforms like PortfolioPilot.com can automatically identify opportunities and help you trade efficiently, often in less than 10 minutes.

Tax-loss harvesting is all about making smart decisions with your investments. By understanding when and how to use it, you can reduce your taxes, optimize your portfolio, and set yourself up for long-term success.

Tax-Loss Harvesting — FAQs

Does tax-loss harvesting work in retirement accounts like IRAs or 401(k)s?
No. Tax-loss harvesting applies only to taxable accounts. Retirement accounts such as IRAs and 401(k)s are tax-deferred, so realized losses in those accounts cannot be used to offset gains or ordinary income.
How much ordinary income can losses offset if no gains exist?
If realized losses exceed gains, up to $3,000 can be deducted against ordinary income in a given tax year. Any remaining losses can be carried forward indefinitely for use in future years.
Why is tax-loss harvesting more valuable for high-income investors?
Higher-income investors face higher capital gains tax rates. Offsetting gains through harvesting reduces the taxable base at those elevated rates, producing proportionally larger savings than for those in lower brackets.
Why does market volatility create harvesting opportunities?
Volatile markets naturally produce positions with gains and others with losses. Investors can realize those losses during downturns, using them to offset gains or income while reinvesting in different securities to maintain market exposure.
In the article’s hypothetical, how did Carlos reduce his tax bill?
Carlos offset a $15,000 gain with a $5,000 realized loss, lowering his taxable gain to $10,000. At a 20% capital gains tax rate, his bill dropped from $3,000 to $2,000, saving $1,000.
Why does timing matter in tax-loss harvesting?
Opportunities often arise throughout the year due to volatility. Limiting harvesting to year-end risks missing losses that could offset earlier gains or rebalance portfolios at more favorable times.
How does the wash-sale rule restrict tax-loss harvesting?
If an investor repurchases the same or “substantially identical” security within 30 days before or after a sale, the IRS disallows the loss. Careful trade planning is required to preserve deductibility.
How can tax-loss harvesting complement portfolio rebalancing?
When reallocating to maintain target asset weights, investors may replace underperforming positions. Harvesting losses at the same time allows them to align portfolio goals while also generating tax offsets.
What is a common mistake investors make when applying tax-loss harvesting?
A frequent error is focusing only on tax savings without considering broader strategy. Overemphasizing short-term tax benefits can compromise long-term allocation and performance objectives.
How can transaction costs erode harvesting benefits?
Frequent trades generate costs that may exceed tax savings. If commissions or spreads reduce proceeds, the net benefit of harvesting losses diminishes, particularly with smaller positions.

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1: As of February 20, 2025