Quick Answer
Tax loss harvesting lets you deduct up to $3,000 annually in investment losses against ordinary income, with unlimited carryforward. A 24% taxpayer saves $720 yearly on $3,000 losses. Capital losses first offset capital gains dollar-for-dollar before reducing ordinary income.
Best Answer
Robert Kim, CPA
Best for investors with taxable brokerage accounts who actively manage portfolios
How tax loss harvesting reduces your tax bill
Tax loss harvesting allows you to sell investments at a loss to offset taxable gains and reduce ordinary income by up to $3,000 per year. The IRS permits unlimited loss carryforward, making this a powerful long-term tax strategy.
Here's how the math works: Capital losses first offset capital gains dollar-for-dollar. Any remaining losses reduce ordinary income up to $3,000 annually ($1,500 if married filing separately). Excess losses carry forward indefinitely.
Example: $10,000 loss scenario
Suppose you have:
Your tax calculation:
The wash sale rule you must avoid
The IRS prohibits claiming a loss if you buy a "substantially identical" security within 30 days before or after the sale. This 61-day window includes:
Violating the wash sale rule disallows the loss deduction and adds the loss to your basis in the repurchased security.
Strategic timing considerations
End-of-year planning: Most harvesting occurs in November-December to offset current-year gains. However, year-round harvesting can be more effective.
Rebalancing opportunity: Use harvesting to rebalance your portfolio. Sell losing positions in overweighted asset classes, then buy similar (but not identical) investments.
Tax bracket management: If you expect higher income next year, consider harvesting more losses now. If you expect lower income, defer some harvesting.
Loss harvesting by investment type
Advanced strategies
Pairs trading: Sell a losing stock and immediately buy a similar company in the same sector to maintain market exposure while avoiding wash sale rules.
Direct indexing: Own individual stocks that mirror an index, allowing you to harvest losses on specific holdings while maintaining overall index exposure.
Asset location: Keep tax-inefficient investments in tax-advantaged accounts and harvest losses in taxable accounts.
What you should do
1. Review your portfolio quarterly for harvesting opportunities, not just year-end
2. Track your cost basis accurately using specific identification method
3. Consider tax-loss harvesting software or robo-advisors that automate the process
4. Coordinate with your tax preparer to maximize the benefit across your entire return
Use our return scanner to identify missed harvesting opportunities from previous years and estimate potential tax savings.
Key takeaway: Tax loss harvesting can save high earners $720-$1,110 annually on $3,000 losses (24-37% tax brackets), with unlimited carryforward making it valuable long-term strategy.
*Sources: [IRS Publication 550](https://www.irs.gov/pub/irs-pdf/p550.pdf), IRC Section 1211, IRC Section 1212*
Key Takeaway: Tax loss harvesting saves $720+ annually for investors in the 24% bracket, with losses first offsetting gains dollar-for-dollar, then reducing ordinary income by up to $3,000 yearly.
Tax savings from $3,000 loss harvesting by income level
| Tax Bracket | Federal Savings | With State Tax (CA) | Total Annual Savings |
|---|---|---|---|
| 12% | $360 | $630 | $630 |
| 22% | $660 | $990 | $990 |
| 24% | $720 | $1,080 | $1,080 |
| 32% | $960 | $1,290 | $1,290 |
| 37% | $1,110 | $1,473 | $1,473 |
More Perspectives
Michelle Woodard, JD
Best for retirees with significant investment holdings and lower ordinary income
Why retirees should prioritize tax loss harvesting
Retirees often have unique advantages for tax loss harvesting: lower ordinary income tax rates, more time to manage investments, and potentially large unrealized losses from market downturns.
The key benefit for retirees is that capital losses offset capital gains at preferential rates. If you're in the 12% ordinary income bracket, your capital gains rate is 0%. However, harvested losses can still offset gains from required minimum distributions (RMDs) from traditional IRAs.
Special considerations for retirees
Social Security implications: Investment losses don't directly affect Social Security taxation, but reducing other income through loss harvesting might lower your provisional income, potentially reducing Social Security taxes.
Medicare surcharge planning: High-income retirees pay Medicare surcharges (IRMAA). Tax loss harvesting can help keep modified adjusted gross income below IRMAA thresholds:
Estate planning benefits: Harvesting losses during your lifetime prevents your heirs from losing the step-up in basis on appreciated assets while capturing the tax benefit of losses.
RMD coordination: Use harvesting losses to offset gains from rebalancing portfolios after taking required minimum distributions.
Key takeaway: Retirees can use loss harvesting to offset RMD-triggered gains and manage Medicare surcharge thresholds, even with lower ordinary tax rates.
Key Takeaway: Retirees benefit from loss harvesting by offsetting RMD gains and managing Medicare surcharges, with potential estate planning advantages for heirs.
Robert Kim, CPA
Best for self-employed individuals and business owners who invest business profits
Business owner advantages in tax loss harvesting
Business owners often have irregular income streams and higher tax brackets, making tax loss harvesting particularly valuable. The ability to time income recognition and coordinate with business tax strategies creates unique opportunities.
Lumpy income management: Business owners with volatile income can harvest losses in high-income years and defer gains to lower-income years. This coordination requires careful planning but can save thousands in taxes.
Net investment income tax (NIIT): Business owners with modified AGI above $200,000 (single) or $250,000 (married) pay 3.8% NIIT on investment income. Loss harvesting reduces both ordinary income taxes and NIIT.
Coordination strategies
Business structure considerations:
Retirement plan contributions: Coordinate loss harvesting with SEP-IRA or Solo 401(k) contributions. Both strategies reduce current-year taxes but through different mechanisms.
Equipment purchases vs. loss harvesting: Compare the tax benefit of Section 179 equipment deductions against harvesting investment losses. Sometimes deferring business purchases while harvesting losses provides better timing.
Key takeaway: Business owners in high tax brackets can save 40.8% (37% income tax + 3.8% NIIT) on harvested losses, making this strategy extremely valuable for managing irregular income.
Key Takeaway: High-earning business owners save up to 40.8% on harvested losses when subject to both top tax rates and net investment income tax.
Sources
- IRS Publication 550 — Investment Income and Expenses
- IRC Section 1211 — Limitation on capital losses
Related Questions
Reviewed by Robert Kim, CPA on February 28, 2026
This content is for educational purposes only and is not a substitute for professional tax advice. Consult a qualified tax professional for advice specific to your situation.