Nobody likes losing money on investments. But tax-loss harvesting is a strategy that lets you turn those losses into a tax benefit. It does not make the loss disappear, but it can reduce the sting.
How Tax-Loss Harvesting Works
The basic idea is simple:
- Sell an investment that has declined in value (realizing a capital loss)
- Use that loss to offset capital gains from other investments
- If losses exceed gains, deduct up to $3,000 against ordinary income
- Carry forward any remaining losses to future years
Example: You sold Stock A for a $5,000 gain and Stock B for a $3,000 loss. Your net taxable gain is $2,000 instead of $5,000. At a 15% capital gains rate, that saves you $450 in taxes.
The Wash-Sale Rule
The IRS has a rule specifically designed to prevent abuse of tax-loss harvesting. The wash-sale rule says:
If you sell an investment at a loss and buy a substantially identical investment within 30 days before or after the sale, the loss is disallowed for tax purposes.
What counts as substantially identical:
- The same stock or fund
- Options on the same stock
- A mutual fund or ETF that is substantially similar
What does NOT violate the wash-sale rule:
- Selling a stock and buying a different stock in the same sector
- Selling one S&P 500 index fund and buying a different S&P 500 index fund (this is a gray area — consult a tax professional)
- Waiting 31 days and buying back the same investment
When It Makes Sense
End of year tax planning. Review your portfolio in November or December to identify losing positions that could offset gains.
After market downturns. A broad market decline may create harvesting opportunities across multiple positions.
Ongoing portfolio management. Some investors and robo-advisors harvest losses throughout the year whenever opportunities arise.
When It Does NOT Make Sense
In tax-advantaged accounts. 401(k)s, IRAs, and Roth IRAs do not have capital gains taxes, so tax-loss harvesting provides no benefit.
If you will be in a lower tax bracket soon. Harvesting saves you taxes at your current rate. If you expect to be in a lower bracket next year, the savings may not be worth the trading costs.
If it disrupts your investment strategy. Selling a good long-term holding just for a tax benefit is usually not worth it.
The Bottom Line
Tax-loss harvesting is a legitimate strategy for reducing your tax bill. It works best as part of a broader investment and tax planning approach, not as a standalone tactic. Consult a tax professional for advice specific to your situation.
The Progressive Trailblazer is an educational platform. For tax advice, consult a qualified tax professional. Educational only. Not financial advice.