Tax-Loss Harvesting: Rules and Strategies for Smart Investing
CORE INSIGHTS
- Tax Efficiency: TLH is a strategy to use investment losses to offset realized capital gains, legally reducing your tax bill.
- The $3,000 Rule: If your losses exceed your gains, you can deduct up to $3,000 per year against ordinary income (e.g., wages).
- The Wash Sale Trap: The IRS forbids buying the same or a “substantially identical” security 30 days before or after selling it for a loss.
Tax-Loss Harvesting (TLH) is a powerful, year-end strategy that helps long-term investors turn a market downturn into a tax advantage. Instead of ignoring losses in your taxable brokerage account, TLH formalizes the process of selling underperforming assets to reduce your overall capital gains liability.
Imagine you realized $10,000 in capital gains this year.
• You then harvest $10,000 in losses.
• Result: Your net capital gain is $0. If you are in the 15% long-term capital gains bracket, you saved $1,500 in taxes.
The best part: Any remaining loss carries forward to future years, continuing your tax optimization.
Visualizing the Financial Benefits
The chart below illustrates the two primary financial benefits of executing a TLH strategy: reducing your current year’s capital gains tax and providing an ordinary income deduction.
*Illustrative data based on a scenario where $10,000 in losses are used to offset gains and deduct from ordinary income. Actual tax savings depend on your bracket.*
The Critical Wash Sale Rule
| Rule Component | Definition | Example to Avoid |
|---|---|---|
| The 61-Day Window | The 30 days before the sale and the 30 days after the sale. | Selling VTI on Dec 1st and buying VTI back on Dec 15th. |
| “Substantially Identical” | Buying an asset that is extremely similar to the one you sold. | Selling VOO and immediately buying IVV (both S&P 500). |
| Wash Sale via IRA | Buying the same stock in an IRA triggers the wash sale, too. | Selling in taxable for a loss, buying in Roth IRA 2 weeks later. |
Strategic Action Steps
TLH only works in a taxable brokerage account. Identify assets that are currently trading below your original purchase price.
To avoid the Wash Sale rule, sell your losing stock/ETF and immediately purchase a similar (but not identical) asset (e.g., sell Total Market, buy Large Cap).
If your realized losses exceed your gains, you can only deduct up to $3,000 against ordinary income per year. Excess loss carries forward.
The Bottom Line: Who Should Harvest Losses?
- Yes, if: You have realized capital gains from selling other investments this year, or you need the $3,000 ordinary income deduction.
- No, if: You only invest in retirement accounts (401k/IRA), or you have not generated any capital gains.