Tax-loss harvesting can allow investors to use realized investment losses to offset realized capital gains. But selling an investment at a loss is only one part of the process. Buying the same or a substantially identical security too close to the sale can trigger the wash-sale rule, potentially delaying or disallowing the tax benefit the investor expected.
What Is the Wash-Sale Rule?
A wash sale generally occurs when an investor sells stock or securities at a loss and acquires the same or substantially identical stock or securities within the applicable 61-day window surrounding the sale.
That window includes:
- The 30 days before the loss sale
- The day of the sale
- The 30 days after the sale
The IRS also notes that the rule can apply when an investor acquires substantially identical securities through a contract or option, or through an IRA or Roth IRA.
If the rule applies, the loss generally cannot be deducted at that time.
For many taxable accounts, the disallowed loss is instead added to the basis of the replacement investment, which may postpone recognition of that loss until a later taxable sale.
Why Does the Rule Matter During Q4?
Tax-loss harvesting often receives more attention late in the year because investors can see more clearly which gains and losses have accumulated.
For example, a household may have:
- Realized gains from selling appreciated stock
- Gains created by diversifying employer stock
- Mutual-fund capital-gain distributions
- Losses in other taxable investments
- Carryforward losses from prior years
Realizing a loss may help offset certain gains.
But a transaction made without reviewing purchases before and after the sale can create an unintended wash sale.
That is why tax-loss harvesting should generally be viewed as a transaction sequence, not just a sell order.
What Does “Substantially Identical” Mean?
The phrase substantially identical is important because the wash-sale rule is not limited to repurchasing the exact same shares.
The IRS does not provide a simple universal percentage test for determining when two investments are substantially identical.
That means investors should be cautious about assuming that two securities are sufficiently different merely because they have different ticker symbols.
Relevant considerations may include:
- Whether the securities represent the same company
- Whether funds track the same or very similar indexes
- Whether an option or contract provides exposure to the same underlying security
- The economic characteristics of the replacement investment
When the distinction is unclear, additional tax guidance may be appropriate.
Can You Stay Invested During the 30-Day Period?
Potentially.
Selling an investment for tax purposes does not necessarily mean remaining entirely in cash for 30 days.
An investor may consider purchasing a different investment that provides desired market exposure without being substantially identical to the security sold.
For example, an investor selling one fund may evaluate another diversified fund with a different underlying index or investment methodology.
But the substitute should still fit the portfolio.
The goal should not be to make an investment decision solely to preserve a tax loss.
Review:
- Asset allocation
- Risk exposure
- Investment objective
- Expense ratio
- Underlying holdings
- Tracking methodology
- How the replacement fits the broader portfolio
Tax-loss harvesting should support the investment strategy rather than override it.
Can Purchases Before the Sale Cause a Wash Sale?
Yes.
This is one of the easier details to overlook.
The wash-sale period does not begin on the day an investment is sold.
It reaches back 30 days before the loss sale.
Suppose an investor regularly purchases shares through an automatic investment program and then decides to sell part of the same investment at a loss.
A purchase made during the preceding 30 days may affect how much of that loss is currently allowed.
That is why investors should review recent transaction history before initiating the sale.
Can an IRA Create a Wash Sale?
Yes.
IRS guidance specifically states that acquiring substantially identical stock or securities in an IRA or Roth IRA within the wash-sale window can trigger the rule.
This makes household-level coordination important.
An investor might sell a security at a loss in a taxable brokerage account while an automatic investment in an IRA purchases the same investment days later.
Looking at only the taxable brokerage account could miss that interaction.
What About a Spouse’s Account?
The IRS also notes that the wash-sale rules may apply when a spouse purchases substantially identical securities after the other spouse realizes a loss.
That means the review may need to extend across:
- Individual brokerage accounts
- Joint accounts
- IRAs
- Roth IRAs
- A spouse’s accounts
- Automatic investment programs
The more accounts a household uses, the more important transaction coordination can become.
How Do Capital Losses Work If the Wash-Sale Rule Does Not Apply?
Capital losses generally offset capital gains under the applicable netting rules.
If allowable capital losses ultimately exceed capital gains, individuals may generally deduct up to $3,000 of net capital loss against other income, or $1,500 for married taxpayers filing separately.
Unused losses can generally be carried forward to future tax years.
That can make losses useful beyond the current year.
But the tax benefit should still be evaluated alongside the investment rationale for selling.
A Practical Tax-Loss Harvesting Review
Before realizing a loss, consider reviewing:
- Realized gains already generated this year
- Realized losses already generated
- Existing capital-loss carryforwards
- Purchases made during the prior 30 days
- Automatic investment plans
- IRA and Roth IRA transactions
- A spouse’s investment activity
- Potential replacement investments
- Expected year-end distributions
- Whether selling still supports the investment strategy
The tax result is only one part of the decision.
How Does Falcon Wealth Planning Approach Tax-Loss Harvesting?
Falcon Wealth Planning is a Fee-Only fiduciary Registered Investment Adviser. Our CFP® professionals and CPAs work with clients to coordinate tax considerations with investment management, retirement planning, equity compensation, and cash-flow decisions.
For taxable portfolios, that may include reviewing realized gains and losses alongside the investment strategy rather than treating tax-loss harvesting as a stand-alone year-end transaction.
The appropriate approach depends on each household’s portfolio, tax circumstances, goals, and other investment activity.
Frequently Asked Questions
What is the wash-sale period?
The applicable window generally covers 30 days before and 30 days after a loss sale, plus the day of the sale itself.
Does a wash sale mean the loss disappears forever?
Not always. In many taxable-account situations, the disallowed loss is added to the basis of replacement securities, potentially postponing recognition until a later disposition.
Can an IRA transaction trigger the wash-sale rule?
Yes. IRS guidance specifically includes purchases of substantially identical securities in an IRA or Roth IRA.
How much net capital loss can generally offset ordinary income?
Individuals may generally deduct up to $3,000 per year, or $1,500 if married filing separately, with qualifying unused losses generally carried forward.
Schedule a No-Cost Financial Assessment
Tax-loss harvesting can affect both the tax return and the investment portfolio. A No-Cost Financial Assessment can help determine whether Falcon Wealth Planning’s coordinated fee-only fiduciary approach may be appropriate for reviewing your taxable investments alongside the rest of your financial plan.
Disclosure
This article is provided for general educational and informational purposes only and does not constitute individualized investment, tax, or legal advice. Wash-sale treatment, capital-loss deductions, investment selection, and tax results depend on individual circumstances and specific transactions. Consult appropriately qualified financial and tax professionals before implementing any strategy. Falcon Wealth Planning, LLC is a fee-only fiduciary Registered Investment Adviser.
