Real Planning

Tax Loss Harvesting: The Year-End Strategy That Could Save You Thousands

Tax Loss Harvesting: The Year-End Strategy That Could Save You Thousands

December 23, 2025

Picture this: You’re sitting at your kitchen table in late December, coffee in hand, reviewing your investment portfolio. The year has been a rollercoaster. Some stocks soared, others stumbled. While you’re celebrating the winners, there’s a powerful strategy hiding in plain sight among those underperformers—one that could significantly reduce your tax bill and boost your after-tax returns for years to come.

Welcome to the world of tax loss harvesting, a sophisticated yet surprisingly accessible strategy that separates proactive investors from those leaving money on the table.

What Exactly Is Tax Loss Harvesting?

Tax loss harvesting isn’t just financial jargon—it’s a practical approach to turning your investment losses into tax advantages. At its core, this strategy involves strategically selling investments that have declined in value to realize losses, which can then offset capital gains from your winning positions.

Think of it as making lemonade from lemons. When an investment doesn’t perform as expected, tax loss harvesting allows you to extract value from that disappointment by reducing your overall tax burden. It’s perfectly legal, encouraged by the IRS within certain guidelines, and when executed properly, can add substantial value to your portfolio over time.

The beauty of tax loss harvesting lies in its dual benefit: you’re not just reducing taxes on this year’s gains, but you’re potentially improving your portfolio’s positioning for future growth. However, this strategy requires careful timing, attention to detail, and a thorough understanding of the rules governing capital gains and losses.

Why Brokerage Accounts Need Special Attention

Here’s something many investors don’t fully appreciate: not all investment accounts face the same tax treatment. Your 401(k), traditional IRA, or Roth IRA enjoy tax-deferred or tax-free growth, creating a protective shield around your investments. These retirement accounts defer tax consequences until withdrawal (or avoid them entirely in the case of Roths), which means selling and buying within them doesn’t trigger immediate tax events.

Brokerage accounts tell a different story entirely. These non-retirement investment accounts operate in the open air, fully exposed to taxation on dividends, interest, and capital gains. Every time you sell a winning position in your brokerage account, you’re potentially creating a taxable event. Depending on how long you held the investment, you’ll face either short-term capital gains taxes (taxed at your ordinary income rate) or long-term capital gains taxes (typically 0%, 15%, or 20% based on your income level).

This is precisely why tax loss harvesting becomes so valuable in brokerage accounts. The flexibility these accounts offer comes with tax implications that demand active management. Without strategic planning, you could hand over a significant portion of your investment gains to the IRS unnecessarily.

For high-income earners, the stakes are even higher. Beyond standard capital gains rates, you might face the 3.8% Net Investment Income Tax, pushing your effective rate on investment gains considerably higher. In states with income taxes, add another layer of taxation. Suddenly, that 20% stock gain becomes significantly less impressive after taxes eat into your returns.

The Mechanics: How Tax Loss Harvesting Actually Works

Let’s walk through a practical example to illustrate how this strategy unfolds in real life.

Imagine you own two stocks in your brokerage account. Stock A, which you purchased for ten thousand dollars, has climbed to fifteen thousand dollars—a nice five-thousand-dollar gain. Stock B, unfortunately, dropped from ten thousand dollars to seven thousand dollars, leaving you with a three-thousand-dollar loss.

If you sell Stock A to lock in profits, you’ll owe capital gains tax on that five-thousand-dollar gain. Depending on your tax bracket and holding period, you might owe anywhere from seven hundred fifty to nearly two thousand dollars in taxes.

Now, here’s where tax harvesting enters the picture. By also selling Stock B and realizing that three-thousand-dollar loss, you can offset three thousand dollars of your gain from Stock A. Instead of paying taxes on five thousand dollars in gains, you’re only taxed on the net two-thousand-dollar gain. The tax savings can be substantial—potentially six hundred to eight hundred dollars or more, depending on your specific tax situation.

But the strategy doesn’t stop there. After selling Stock B, you can immediately reinvest that money into a similar (but not identical) investment, maintaining your market exposure while capturing the tax benefit. This is where understanding the wash sale rule becomes critical.

The Wash Sale Rule: Navigating the IRS Guidelines

The IRS isn’t naive to tax loss harvesting strategies, which is why they’ve implemented the wash sale rule. This regulation prevents you from selling a security at a loss and immediately repurchasing the same or a “substantially identical” security within 30 days before or after the sale.

If you violate the wash sale rule, the IRS disallows your loss deduction, and the loss gets added to the cost basis of the replacement security instead. While this doesn’t eliminate the tax benefit entirely, it defers it, defeating the immediate purpose of tax harvesting.

So how do you maintain market exposure while respecting the wash sale rule? The key lies in finding similar but not substantially identical investments. For example, if you sell a technology sector ETF at a loss, you might replace it with a different technology ETF that tracks a slightly different index. Or if you sell shares of one large-cap growth fund, you could purchase another large-cap growth fund from a different provider with a different strategy.

The 30-day waiting period applies both before and after the sale, creating a 61-day window to navigate carefully. Many savvy individual investors mark their calendars and set reminders to avoid accidentally triggering a wash sale through separate purchase decisions. This, of course, is done for you with our portfolio management team!

Beyond Simple Offsets: Advanced Tax Harvesting Benefits

Tax loss harvesting offers benefits that extend well beyond simply offsetting current-year capital gains. Understanding these additional advantages reveals why sophisticated investors and advisors prioritize this strategy.

First, if your losses exceed your gains for the year, you can deduct up to three thousand dollars of excess losses against your ordinary income. For someone in the 32% federal tax bracket, that’s nearly a thousand dollars in tax savings right there. Even better, any losses beyond this three-thousand-dollar limit carry forward indefinitely to future tax years, creating a reservoir of tax benefits you can tap into as needed.

This carry-forward provision makes tax harvesting valuable even in years when you haven’t realized significant gains. By banking losses during market downturns, you’re essentially building tax credits for future use, whenever you need to sell appreciated assets.

Second, strategic tax harvesting allows you to rebalance your portfolio while minimizing tax consequences. As markets move, your asset allocation naturally drifts from your target. Tax harvesting provides opportunities to sell overweighted positions that have declined, capturing losses while moving back toward your desired allocation.

Third, this strategy enables portfolio upgrades without the full tax penalty. Perhaps you’ve held a mediocre investment that’s currently underwater. Tax harvesting lets you exit that position, capture the loss, and redeploy capital into a potentially stronger investment—all while reducing your tax bill.

Why Some Advisors Drop the Ball

Here’s an uncomfortable truth: despite its proven value, many financial advisors and investment firms neglect tax loss harvesting. Understanding why this happens reveals important insights about the financial services industry.

Tax harvesting requires significant effort, ongoing monitoring, and meticulous record-keeping. It demands constant attention to market movements, regular portfolio reviews, and careful tracking of purchase dates, holding periods, and cost basis information. For advisors managing dozens or hundreds of client accounts, this additional workload can feel overwhelming, especially when their compensation structure doesn’t explicitly reward this extra effort.

Some advisors also lack the technological tools or systematic processes to implement tax harvesting efficiently across their client base. Without proper software and automation, identifying harvesting opportunities manually becomes time-consuming and error-prone. Smaller firms or independent advisors might not have invested in the technology infrastructure that makes consistent tax harvesting practical.

There’s also an unfortunate reality about incentives in the financial industry. Tax savings don’t show up as impressive line items on quarterly statements. When an advisor saves you two thousand dollars through smart tax harvesting, it’s less visible than if they had picked a stock that rose 20%. The psychological impact differs dramatically, even though both actions add equivalent value to your wealth.

Additionally, some advisors worry about the appearance of increased trading activity in client accounts. They fear that clients might misinterpret strategic selling as poor investment selection or excessive churning, even when the trades serve a clear tax purpose. This concern, while somewhat valid, often leads to inaction that costs clients real money.

At forward-thinking firms, tax loss harvesting isn’t optional—it’s a core component of comprehensive wealth management. These firms recognize that portfolio management extends far beyond simply picking investments. It encompasses tax efficiency, rebalancing, cash flow planning, and coordinating all financial moving parts to maximize after-tax, after-fee returns.

Implementing Tax Harvesting: A Year-Round Strategy

While many investors associate tax harvesting with year-end planning, truly optimized implementations occur throughout the year. Volatility creates opportunities, and market downturns don’t wait for December.

A systematic approach to tax harvesting involves regularly reviewing your brokerage accounts for positions trading below their cost basis. Some investors and advisors set specific thresholds—perhaps scanning for losses exceeding 5% or 10%—to identify meaningful harvesting opportunities while avoiding transaction costs on trivial amounts.

The fourth quarter does deserve special attention, however. As December 31st approaches, this deadline for realizing losses in the current tax year concentrates focus. Reviewing your full-year capital gains situation helps determine how aggressively to pursue harvesting opportunities. If you’ve realized substantial gains earlier in the year, you’ll want to maximize loss harvesting before year-end.

Market volatility actually enhances tax harvesting opportunities. During corrections or bear markets, when many positions show losses, the potential for harvesting expands dramatically. Some of the most valuable harvesting years occur during market turbulence, when disciplined investors capture substantial losses that provide tax benefits for years to come.

Tax Harvesting Across Different Account Types

Understanding which accounts benefit from tax harvesting helps you deploy this strategy most effectively. As mentioned earlier, tax-advantaged retirement accounts like IRAs and 401(k)s don’t benefit from tax harvesting because transactions within these accounts don’t trigger taxable events.

Brokerage accounts represent the primary opportunity for tax harvesting. Whether individual or joint accounts, these non-retirement vehicles face full exposure to capital gains taxation, making them ideal candidates for active tax management.

Interestingly, Health Savings Accounts (HSAs) and 529 college savings plans also don’t benefit from tax harvesting, as these tax-advantaged vehicles shelter investment growth from taxation when used for qualified expenses.

For business owners with taxable investment accounts held within corporations or pass-through entities, tax harvesting strategies require additional considerations around corporate tax rates and how those losses flow through to personal returns.

Coordinating Tax Harvesting with Your Overall Financial Plan

Tax loss harvesting doesn’t exist in isolation—it’s one piece of a comprehensive financial strategy. The most effective implementations coordinate harvesting with your broader financial goals, tax situation, and life circumstances.

For instance, if you’re planning to sell a business or investment property in the coming year, generate substantial capital gains, aggressive tax harvesting in advance can create a bank of losses to offset those future gains. Similarly, if you expect your income to spike temporarily, moving you into a higher tax bracket, harvesting gains in lower-income years and banking losses for higher-income years adds incremental value.

Estate planning considerations also intersect with tax harvesting decisions. Assets held until death receive a step-up in cost basis, eliminating built-in capital gains. Understanding which assets you might hold long-term versus those you’ll likely sell helps prioritize where to focus harvesting efforts.

Charitable giving presents another coordination opportunity. Donating appreciated securities to charity allows you to avoid capital gains taxes while claiming a charitable deduction at fair market value. Conversely, it rarely makes sense to donate depreciated securities—sell those to capture the tax loss, then donate the cash proceeds instead.

Getting Started with Tax Loss Harvesting

If you’re intrigued by tax harvesting but haven’t implemented it yet, here’s how to begin. Start by taking inventory of all your brokerage accounts. Identify positions currently trading below your purchase price—your cost basis. This creates your initial list of potential harvesting candidates.

Next, evaluate the magnitude of losses. Focus on meaningful amounts where the tax benefit justifies the transaction costs and effort. A fifty-dollar loss might not move the needle, while a five-thousand-dollar loss certainly does.

Consider your full-year tax situation. Have you already realized capital gains this year? Do you expect substantial gains from upcoming transactions? Your answers guide how aggressively to pursue harvesting opportunities.

Research replacement investments that maintain similar market exposure without violating the wash sale rule. Build a list of suitable alternatives before selling, ensuring you can immediately redeploy capital without sitting in cash.

Finally, maintain meticulous records. Document purchase dates, sale dates, costs, proceeds, and the rationale for each transaction. Come tax time, this documentation proves invaluable, and over the years, it creates a clear audit trail of your tax harvesting strategy.

Working with the Right Advisor

The difference between advisors who actively implement tax harvesting and those who don’t can literally cost you tens of thousands of dollars over a lifetime of investing. When evaluating financial advisors, asking about their approach to tax efficiency reveals priorities and capabilities.

Questions to pose include: How do you approach tax loss harvesting? How frequently do you review accounts for harvesting opportunities? What systems or technologies do you use to identify these opportunities? Can you show me examples of how tax harvesting has benefited other clients? How do you track cost basis and wash sale rules across my accounts?

An advisor who confidently discusses systematic approaches, demonstrates robust processes, and shows genuine enthusiasm for tax efficiency likely views themselves as a comprehensive wealth manager rather than simply an asset allocator.

Remember, you’re not just paying for investment selection—you’re paying for comprehensive financial management that includes tax optimization. An advisor who generates an extra 1% in annual returns through superior investment selection but costs you 1.5% through tax inefficiency hasn’t added net value.

The Long-Term Impact: Compounding Your Tax Savings

Perhaps the most compelling aspect of consistent tax harvesting is its compounding effect over time. Each dollar saved in taxes remains invested, generating additional returns that compound over years and decades.

Consider two identical investors, each with a million-dollar portfolio generating 7% annual returns. One implements systematic tax harvesting, saving an average of five thousand dollars annually in taxes. The other neglects this strategy. After 20 years, assuming both reinvest their tax savings, the difference in final wealth exceeds two hundred thousand dollars. That’s the power of tax efficiency compounding over time.

These numbers aren’t hypothetical—research consistently shows that tax-aware investing strategies, including tax loss harvesting, can add 0.5% to 1.5% or more to annual after-tax returns. Over a lifetime of investing, this translates to substantial wealth preservation.

Final Thoughts: Making Tax Harvesting Work for You

Tax loss harvesting represents one of the most powerful yet underutilized strategies in personal investing. It requires diligence, systematic implementation, and sometimes overcoming the psychological resistance to selling positions at losses. However, the long-term benefits to your after-tax wealth make this effort worthwhile.

At Bertram Financial, we view tax efficiency as a cornerstone of comprehensive wealth management, not an optional extra. We’ve built systems and processes that identify harvesting opportunities across client portfolios consistently, ensuring that market volatility works in your favor, not just against you.

As we approach year-end and begin planning for the coming year, now is the perfect time to evaluate whether tax loss harvesting deserves a place in your financial strategy. The market volatility we’ve experienced creates opportunities, and the potential tax savings could be substantial.

Remember, investment success isn’t just about what you earn—it’s about what you keep after taxes and fees. Tax loss harvesting helps you keep more of what you’ve earned, allowing that money to continue working for your financial goals rather than going to the IRS.

If you haven’t implemented tax harvesting yet, or if your current advisor isn’t actively managing this aspect of your portfolio, reach out to us at Bertram Financial. We’d be happy to review your situation and identify opportunities to enhance your after-tax returns through strategic tax management.


Frequently Asked Questions About Tax Loss Harvesting

Q: Can I use tax loss harvesting in my IRA or 401(k)?

A: No, tax loss harvesting only works in taxable brokerage accounts. IRAs, 401(k)s, and other tax-advantaged retirement accounts don’t generate taxable capital gains or deductible losses, so there’s no tax benefit to harvesting losses within them. These accounts already enjoy tax deferral or tax-free growth, which is their primary advantage. Focus your tax harvesting efforts exclusively on non-retirement investment accounts where capital gains and losses have immediate tax implications.

Q: What happens if I accidentally trigger a wash sale?

A: If you violate the wash sale rule by purchasing a substantially identical security within 30 days before or after selling at a loss, the IRS disallows your loss deduction for that tax year. However, the disallowed loss isn’t permanently lost—it gets added to the cost basis of the replacement security. This means you’ll eventually capture the tax benefit when you ultimately sell the replacement security, but you lose the immediate tax advantage you were seeking. To avoid wash sales, carefully track your transactions and choose replacement securities that are similar but not substantially identical.

Q: How much can tax loss harvesting actually save me in taxes?

A: The savings depend on several factors: the amount of losses you realize, your capital gains for the year, your income tax bracket, and your state tax situation. As a general guideline, if you’re in the 24% federal tax bracket and you harvest ten thousand dollars in losses to offset gains, you might save around 2,400 dollars in federal taxes, plus potential state tax savings. If your losses exceed your gains, you can deduct up to three thousand dollars against ordinary income, and carry forward remaining losses indefinitely. Over time, consistent tax harvesting can add 0.5% to 1.5% or more to your annual after-tax returns.

Q: Is tax loss harvesting only valuable at year-end?

A: While many investors focus on tax harvesting in November and December before the December 31st deadline, the strategy offers value throughout the year. Market volatility creates opportunities whenever they occur, and capturing losses as they arise can be more effective than waiting until year-end when opportunities might have disappeared. Some of the best harvesting opportunities occur during market corrections and bear markets, which don’t follow a calendar schedule. A systematic, year-round approach typically captures more value than once-yearly reviews.

Q: Should I avoid selling at a loss because it means my investment didn’t work out?

A: This is a common psychological barrier that costs investors real money. Recognizing that an investment has declined doesn’t change the underlying reality—the loss exists whether you realize it or not. By strategically realizing the loss through tax harvesting, you extract value from that disappointment through tax savings while immediately redeploying capital into a similar investment to maintain your market exposure. Think of it as making the best of the situation rather than pretending the loss doesn’t exist. The most successful investors separate emotion from strategy and use every available tool, including tax harvesting, to optimize their after-tax returns.

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