Investors Beware of the Wash Sale

in Investing, Personal Finance Essentials by

Most investors understand that if you sell a stock, mutual fund or security for less than what you paid for it, you can claim a loss on your tax return that can be used to offset capital gains on your other investments. Actively managing your portfolio to recognize losses that can offset your gains is an excellent way to lower your total taxes – provided you understand and comply with the “wash sale” rules.

The IRS does not allow you to claim a loss from the sale of a stock or security if you repurchase the same or “substantially identical” stock or security within 30 days, either before or after the sale. This is called a wash sale, and the loss cannot be recognized immediately. Instead, the loss is added to the cost basis for the new purchase.

Let’s look at an example. Let’s say that Megan, a fellow investor, originally purchases 100 shares of ABC stock at $10 per share, or $1,000 total. On July 1, ABC stock is selling at $7 per share. Megan decides to sell her 100 shares for $700 total. She has a loss of $300. But on July 10, ABC stock drops to $5 per share. Megan decides this is an excellent buying opportunity, so she re-purchases 100 shares of ABC stock at the lower price. This series of trades has created a wash sale, and Megan can no longer claim the $300 loss on the original purchase and sale, at least not at this time. The disallowed $300 loss is applied to the re-purchase price (or basis). So the basis of Megan’s second purchase is $800 – the $500 purchase price plus the $300 disallowed loss from the initial purchase. The benefit of the initial loss is deferred until the new replacement shares are sold.

But what if Megan wants to claim the tax loss? She could wait until August 1 or later before re-purchasing any ABC stock. If she doesn’t want to be out of the market for an entire month, she could identify and purchase another similar (but not “substantially identical”) stock. For example, XYZ stock may be in the same industry, but since it is a different company, it is not “substantially identical” and the wash sale rules wouldn’t apply to the purchase of XYZ stock.

So, what is the definition of a “substantially identical” security? While the strict definition can get complex and is subject to interpretation, it’s easier to look at the bigger picture. Is it an identical investment? Stocks in different companies in the same industry are not identical. Stock in Apple is not identical to stock in Microsoft. However, different classes of stock in the same company are likely to be considered “substantially identical.”

For mutual fund investors, a Large Cap Growth Fund from one mutual fund provider is not identical to a Large Cap Growth Fund from another mutual fund provider. There are almost certainly significant differences in their holdings. However, an S&P 500 Index fund from one mutual fund provider is likely to be “substantially identical” to an S&P 500 Index fund from another mutual fund provider, because, by definition, their holdings are the same.

Another point to keep in mind: crossing over to a new year has no impact on the wash sale rules. You can’t sell a stock at a loss on December 20 and re-purchase the stock on January 10 and recognize the loss. That is still a wash sale. You still need to wait at least 30 days before repurchasing if you want to claim the loss.

Also, investors that participate in automatic purchase plans, such as monthly mutual fund purchases or purchases of company stock, or even reinvestment of dividends should be cautious of purchase and resale dates to avoid triggering a wash sale, particularly when temporarily selling your entire position.

Periodically harvesting losses in your portfolio is an excellent way to minimize your overall tax bill. Just watch your calendar and re-purchases after selling for losses. With just a bit of thought, it’s not difficult to avoid a wash sale.

Start Saving More With Personal Capital Today

Gene Salo is Senior Director at, an online do-it-yourself tax preparation program designed to make filing your personal income taxes easy and convenient.

The following two tabs change content below.
Gene Salo

Gene Salo

Gene “Geno” Salo has worked in the tax industry across a variety of roles for over 20 years. His current position is Senior Director over Tax Simple, an online do-it-yourself tax preparation program designed to make filing your personal income taxes easy and convenient. Geno also serves on the Board of Directors for CERCA (Council for Electronic Revenue Communication Advancement) and is a member of the Free File Alliance, a partnership between the software industry and the IRS to provide free tax return preparation options to consumers. Geno has an MBA from the University of Michigan and is a veteran of the US Air Force. Geno contributes blog articles for Tax Simple customers, and also delivers specialized content direct to tax professionals and CPAs.
Gene Salo

Latest posts by Gene Salo (see all)


  1. Nathan

    The article title is a bit suggestive. I don’t think anyone should be going out of their way to avoid a wash sale. Anyone who is following Personal Capital’s investing advice probably won’t ever have to care about them.

    The only time it matters is if you’re trying to sell things at a loss for taxes.

  2. B

    I think wash sales are easier to do than you the earlier commenter might think. Also, what I liked about this article was that it did the first I’ve recently seen to outline what actually is substantially identical. Same index or different class of same stock… that’s simple and easy to remember. Thanks.

    • Nathan

      @B: You’re right. It’s actually really easy to hit wash sales, especially if you have multiple accounts and tend to trade similar stocks on them. My point was that for most people, wash sales have little or no negative impact. It’s only when you’re harvesting stock losses for up to $3000/yr that you need to consider them. So while I think this is quite a good article, I find the title somewhat misleading.


Leave a Reply

Your email address will not be published.

Disclaimer. This Website may contain links to third-party websites. These links are provided solely as a convenience to you and does not imply an affiliation, sponsorship, endorsement, approval, investigation, verification, or monitoring by PCAC of the contents on such third-party websites. Please be advised that PCAC is not responsible for the content of any website owned by a third party.