Wash-sale rule: can you deduct a stock loss after buying back?

The wash-sale rule can prevent US investors from deducting a stock loss if they acquire substantially identical securities within 30 days before or after the sale. Before selling during a market downturn, check replacement purchases, automatic reinvestments, and other accounts. A lower portfolio value alone does not create a deductible loss.

• The timing test looks backward as well as forward from a loss sale.
• Purchases in another brokerage account, an IRA, or a spouse’s account can matter.
• A disallowed loss usually adjusts replacement securities’ basis, but IRA replacements receive different treatment.
• A tax-loss strategy still needs to fit your investment plan and recordkeeping capacity.

When does selling a losing stock trigger the wash-sale rule?

According to the IRS in its 2025 edition of Publication 550, selling stock or securities at a loss can trigger a wash sale when substantially identical investments are acquired within the specified period. That includes purchases before the sale, not just a quick repurchase afterward. Certain contracts and options to acquire the securities can count, too.

The rule restricts the loss deduction; it does not prohibit the trade. Selling and buying back may be allowed by your brokerage while still producing an unfavorable tax result. An order confirmation is not confirmation that a loss is deductible.

Separate a market decline from a realized loss

A red number on a dashboard is not necessarily the amount available for a tax deduction. Tax reporting compares sale proceeds with adjusted basis, which generally starts with acquisition cost and can change through adjustments. Different batches of shares can have different bases even when they share a ticker.

Before selecting shares to sell, distinguish the investment decision from the tax decision. Our explanation of checking cash needs before trading during a market correction addresses the broader planning question. A potential deduction does not make an unsuitable sale worthwhile.

Which purchases can interfere with a planned deduction?

Start with a calendar and the transaction histories for relevant accounts. Review acquisitions during the 30 days preceding the proposed sale, then identify purchases that could occur during the 30 days afterward. Looking only at orders placed after selling leaves part of the test unchecked.

• Check recurring investment orders and dividend reinvestments for the security being sold.
• Review other taxable brokerage accounts rather than treating each broker as a separate tax boundary.
• Check purchases of substantially identical stock in your IRA or Roth IRA.
• Coordinate with a spouse whose purchases could overlap the transaction.
• Review contracts or options that could create a replacement position.

Automatic purchases deserve attention because they may continue without a fresh trading decision. A dividend reinvestment can buy replacement shares even while you believe you are waiting to repurchase. If only some shares are replaced, the matching rules may disallow only the associated portion of the loss.

Does a different fund name solve the problem?

Not necessarily. The relevant test is whether the securities are substantially identical, not whether their names, sponsors, or ticker symbols differ. A new label is not enough to establish that a replacement qualifies.

Fund substitutions can require a closer review of what each investment holds and tracks. Avoid treating a particular pair of funds as universally approved without tax guidance for the actual transaction. A replacement also changes your holdings, so its risks and costs matter independently of the deduction.

What happens to a loss that is disallowed?

For a typical taxable-account replacement, Publication 550 explains that the disallowed loss is added to the replacement securities’ cost basis. This generally shifts recognition of that loss rather than allowing the original deduction immediately. The prior holding period also generally carries into the replacement position.

That adjustment is not the same as receiving a refund when you trade. Its effect depends on later transactions and the tax rules that apply to them. Repeated overlapping purchases and sales can also make the records harder to follow.

Why does an IRA purchase need special attention?

When substantially identical stock is acquired in an IRA or Roth IRA within the relevant period, the original taxable loss can still be disallowed. However, the usual addition to replacement basis does not apply to that IRA acquisition. Treating every wash sale as a simple postponement would miss this distinction.

The practical check is not limited to where the losing shares are held. Review where replacement purchases happen as well. A tax professional can help distinguish an ordinary taxable-account basis adjustment from an IRA-related loss that does not receive that adjustment.

Can tax-loss harvesting still make sense in a downturn?

Tax-loss harvesting means deliberately realizing investment losses for potential tax use. IRS Topic 409 explains that capital gains and losses are netted under rules that distinguish short-term from long-term results. Excess losses may be subject to annual deduction limits and carried forward when eligible.

Its usefulness therefore depends on more than whether a stock has fallen. Existing gains, prior loss carryovers, account type, transaction costs, and the replacement investment all affect the decision. The strategy cannot reverse the underlying investment loss.

Staying in cash while waiting to repurchase can expose you to missed price increases. Buying something different maintains some market exposure but changes what you own. Neither approach guarantees a better after-tax outcome.

Investors taking retirement withdrawals face another planning issue: selling assets while prices are down can affect portfolio longevity. The guide to sequence of returns risk in early retirement explains that separate concern. Tax treatment is only one part of the withdrawal decision.

What records help when it is time to file?

Keep purchase dates, sale dates, quantities, proceeds, adjusted basis, and replacement-trade details together. Include activity from relevant accounts outside the broker that handled the sale. Those records help explain both the initial loss and any later basis adjustment.

A broker’s Form 1099-B may show a wash-sale adjustment, but its absence does not establish deductibility. Publication 550 makes clear that an unreported wash sale still cannot produce an allowable loss deduction. Most investment sales flow through Form 8949 and Schedule D, subject to the applicable reporting instructions.

Informational content only, not financial advice.