Tax-loss harvesting means selling an investment that’s declined in value to realize a capital loss, then using that loss for a capital gains tax offset elsewhere in your portfolio – a straightforward way to reduce capital gains tax – and, once gains are fully offset, up to $3,000 of ordinary income each year. It’s a genuinely valuable strategy, though it’s often misunderstood as free money rather than what it actually is: a way to reduce – and sometimes just defer – what you owe. Here’s how it actually works, including the rule that trips up more investors than anything else.
Key Takeaways
- Capital losses offset capital gains dollar-for-dollar, with no limit on the amount.
- Excess losses can offset up to $3,000 of ordinary income per year ($1,500 if married filing separately), with any remainder carried forward indefinitely.
- The wash sale rule disallows the loss if you buy a “substantially identical” security within 30 days before or after the sale – a 61-day window in total.
- This rule applies across every account you own, including your spouse’s IRA, not just the account where the sale happened.
- Tax-loss harvesting is often a deferral strategy, not a permanent tax savings – it can lower your cost basis on the replacement investment.
- Year-end isn’t the only time to harvest losses – opportunities can arise throughout the year, not just in December.
What Is Tax-Loss Harvesting, and How Does the Core Mechanism Work?
At its foundation, this strategy is about using a real, realized loss to reduce a real tax bill – not a theoretical or paper loss.
How Do Losses Actually Offset Gains?
When you sell an investment for less than you paid, the resulting capital loss can offset capital gains realized elsewhere in your portfolio dollar-for-dollar, with no upper limit on how much gain can be offset this way. CCWMG incorporates tax-loss harvesting as an ongoing part of coordinating investment decisions with each client’s broader financial picture, rather than treating it as a once-a-year exercise.
What Happens If Your Losses Exceed Your Gains?
If your total capital losses exceed your total capital gains for the year, you can use up to $3,000 of the excess to reduce ordinary income like salary ($1,500 if married filing separately), and any remaining loss becomes a tax loss carryforward, continuing indefinitely into future tax years until it’s fully used. This carryforward never expires during your lifetime, which means a large loss harvested during a difficult market can continue providing tax value for years afterward.
Short-Term vs. Long-Term Capital Losses: How Does the Order Matter?
Not all losses are treated identically – the type of loss affects how much tax value it actually delivers.
Why Does Harvesting Short-Term Losses First Often Deliver More Value?
Short-term losses first offset short-term gains, which are taxed at ordinary income rates as high as 37%, while long-term losses first offset long-term gains, taxed at preferential rates – meaning a dollar of short-term loss can sometimes deliver more tax value than a dollar of long-term loss, depending on your situation. This is a detail that’s easy to overlook if losses are harvested without attention to how gains are categorized.
What Happens When Losses Cross Between Categories?
If short-term losses exceed short-term gains, the excess can offset long-term gains, and the same works in reverse for long-term losses exceeding long-term gains – the categories aren’t fully siloed from each other, just ordered in a specific sequence. Understanding this ordering matters when deciding which specific positions to harvest and when.
What Is the Wash Sale Rule, and Why Is It the Biggest Trap?
This is the single rule most likely to accidentally undo an otherwise well-executed harvesting strategy.
What Counts as a “Substantially Identical” Security?
Under IRC Section 1091, if you sell a security at a loss and buy a “substantially identical” security within 30 days before or after the sale, the loss is disallowed – a 61-day window in total once both sides are counted. The disallowed loss doesn’t simply disappear; it’s added to the cost basis of the repurchased security that triggered the wash sale, which raises that security’s basis by the disallowed amount. That higher basis reduces the taxable gain – or increases the deductible loss – whenever that specific position is eventually sold, effectively deferring the tax benefit to that future sale rather than eliminating it entirely.
Does the Wash Sale Rule Apply Across All of Your Accounts?
Yes – the wash sale rule applies across every account you and your spouse own, including taxable brokerage accounts, IRAs, and 401(k)s, not just the specific account where the loss was realized. Selling a position at a loss in one account and repurchasing it in a spouse’s IRA within the window still triggers a wash sale, which is a detail that surprises a meaningful number of investors managing multiple accounts.
Is Tax-Loss Harvesting Really “Free Money,” or Something Else?
Understanding what this strategy actually delivers – and doesn’t – matters more than the mechanics alone.
Why Is This Often a Deferral Strategy, Not a Permanent Tax Savings?
When a harvested loss is reinvested into a similar (not substantially identical) security, the replacement typically has a lower cost basis, which generally means a larger taxable gain – and more tax owed – whenever that replacement is eventually sold at a profit. This doesn’t make the strategy less valuable, but it does mean thinking of it as “free” tax savings, rather than a deferral, misunderstands what’s actually happening.
When Does Tax-Loss Harvesting Provide the Most Value?
The strategy tends to provide the most genuine value when your current tax bracket is higher than the bracket you expect in the future, since the deferral effectively shifts tax liability toward a period when you may pay less. For high earners specifically, harvested losses can also help reduce exposure to the additional 3.8% Net Investment Income Tax, which adds another layer of value beyond the basic offset mechanics.
When and How Should Tax-Loss Harvesting Actually Be Used?
Timing and consistency both affect how much value this strategy actually captures.
Why Do Many Investors Only Think About This in December?
Year-end is when many investors first think about tax-loss harvesting, largely because it’s when tax filing becomes top of mind – but market volatility that creates harvesting opportunities can happen at any point in the year, and waiting until December can mean missing opportunities that already closed. A more consistent, ongoing approach tends to capture more value than a single once-a-year review.
How Does CCWMG Approach Tax-Loss Harvesting?
CCWMG’s Milestone Clarification Process™ (MCP™) coordinates tax-loss harvesting with a client’s broader investment strategy and tax picture throughout the year, rather than treating it as an isolated, once-a-year task. CCWMG’s complimentary Second Opinion Service™ is a reasonable way to see whether your current approach – if you have one – is actually capturing the opportunities available to you.
Frequently Asked Questions
Can I harvest a loss and immediately buy back the exact same investment? No – doing so within 30 days before or after the sale triggers the wash sale rule, disallowing the loss. You’d need to wait out the 61-day window or purchase a similar, but not substantially identical, investment instead.
Does tax-loss harvesting make sense if I don’t have any gains to offset this year? Often yes – even without gains, up to $3,000 of losses can offset ordinary income annually, and any unused loss carries forward indefinitely to offset future gains or income.
Wondering If Your Portfolio Is Actually Capturing Available Tax-Loss Opportunities?
A down market isn’t just a loss on paper – it can be a real, usable tax opportunity if it’s harvested correctly and coordinated with the rest of your tax picture. Creative Capital Wealth Management Group can help you find out what your current portfolio might be missing.