Wash sale

This page is not intended to be a complete guide to wash sales; rather, it describes the wash sale issues most likely to be important to Vanguard mutual fund investors. See Links below for a more complete reference and the official IRS publication.

General description
If you sell a mutual fund or stock for less than the purchase price, you have a capital loss, and you can usually report this as a loss and subtract it from your income. However, if you sold the shares and then bought them right back, or bought new shares and then immediately sold the old shares, the IRS will rule that you did not really sell them, and will not allow you to deduct the loss at that time.

Here is the official definition from IRS Publication 550:


 * A wash sale occurs when you sell or trade stock or securities at a loss and within 30 days before or after the sale you:
 * Buy substantially identical stock or securities,
 * Acquire substantially identical stock or securities in a fully taxable trade, or
 * Acquire a contract or option to buy substantially identical stock or securities.
 * If you sell stock and your spouse or a corporation you control buys substantially identical stock, you also have a wash sale.

Consequences
If you have a wash sale, you do not deduct the loss immediately, but you add the loss to your basis in the new shares, so that you can deduct the loss when you sell those shares. It is still better to take the loss earlier, as it produces an immediate benefit; in addition, a wash sale negates the value of Tax Loss Harvesting.

For example, you bought 100 shares of a mutual fund at $40. On March 1, you sold 100 shares at $30. On March 10, you bought 100 shares at $35. Your sale on March 1 was a wash sale, so you could not deduct the $1000 loss at the time, but your basis in the March 10 shares is $4500, not $3500, so you will reduce your capital gains or increase your losses when you sell those shares.

If you have a wash sale and the replacement shares are in your IRA or 401(k), you will lose all benefit from the capital loss, because you do not pay tax on capital gains in the IRA or 401(k).

How to avoid wash sales
You can avoid a wash sale by avoiding either criterion; either make sure that you buy any replacement shares at least 31 days before or after the sale, or buy replacement shares which are not substantially identical.

30-day limit
To avoid the 30-day limit, do not reinvest dividends or capital gains in your taxable funds. Otherwise, the reinvestment will cause a wash sale (for at least the shares bought with the reinvestment) if you sell the fund at a loss within 30 days of the distribution; this will affect a sale for eight months of the year if the fund pays dividends quarterly, and at all times if the fund pays dividends monthly. (If you use Specific Identification of Shares, you can avoid a wash sale on a reinvestment in the last 30 days by selling those shares, since the potential replacement shares no longer exist.)

If you are Tax Loss Harvesting, you need to wait at least 31 days before buying the fund back; for those 31 days, leave the money in some other fund, possibly a money-market fund so that you will not have a capital gain when you move it back.

If you hold the same fund in your IRA or 401(k) as in your taxable account, make sure that there are no recent contributions to that fund if you might want to sell your taxable fund at a loss. Direct distributions in the IRA or 401(k) to a different fund in the same account. In a 401(k) in which contributions are made from every paycheck, direct your new contributions to a different fund as well.

Substantially identical
The IRS does not have a clear definition of substantially identical; it is determined by all the facts and circumstances in a particular case. Two share classes of the same fund, such as a mutual fund and a corresponding ETF, are probably substantially identical. There is no ruling on whether two funds operated by different companies tracking the same index are substantially identical; tax experts have differing opinions. Two funds tracking different indexes, or an index fund and an actively managed fund in the same asset class, should not be substantially identical; again, there is no clear IRS ruling.

Therefore, when Tax Loss Harvesting, if you do not put the proceeds of your sale in a money-market fund for the 31-day waiting period, you will need to find a similar fund which does not qualify as substantially identical. (And it should be a fund which you are willing to hold; if the market goes up in those 31 days, you might have a significant capital gain if you switch back.)

You can also reduce the risk of wash sales with your IRA or 401(k) by not holding substantially identical funds there and in your taxable account; if you have an S&P 500 index in your 401(k), you can hold Vanguard Total Stock Market Index Fund or Vanguard Large Cap Index Fund instead of Vanguard 500 Index Fund in your taxable account.

Links
Fairmark guide to wash sales

IRS Publication 550, Investment Income and Expenses