Wash Sales Across Accounts — The IRA, Spouse, and Multi-Broker Trap

You sold a stock at a loss in your taxable brokerage account, and you were careful — you didn't rebuy it there for 31 days. So the loss is safe, right? Not necessarily. If you (or your spouse) bought that same stock in a different account within the window — your IRA, a second broker, your 401(k), your spouse's account — the loss may be disallowed anyway, and worse, in some cases it disappears permanently.

The wash sale rule doesn't stop at the edge of one account. It applies across all of your accounts, and even across your spouse's, and brokers have no way to see the whole picture. Each broker only reports wash sales within its own walls, so cross-account wash sales are invisible on your 1099-Bs — which makes them your responsibility to catch and report. This guide explains how the rule reaches across accounts and how to handle it on your return.

A Quick Refresher on the Wash Sale Rule

The wash sale rule disallows a loss if you buy the same or a "substantially identical" security within 30 days before or after the sale — a 61-day window total. The disallowed loss isn't gone; it's added to the cost basis of the replacement shares, deferring the benefit until you sell those. If you need the fundamentals, our wash sales explained on Form 8949 guide covers the mechanics; this article is about the cross-account dimension that trips people up.

The Rule Crosses All Your Accounts

Here's what most investors miss: the wash sale rule looks at you as a taxpayer, not at individual accounts. A loss sale in one account is washed by a purchase in any account you control:

• Taxable account at Broker A loss + repurchase in your taxable account at Broker B = wash sale. Neither broker sees the other, so neither reports it — but it's still a wash sale you must report.
• Taxable loss + repurchase in your traditional or Roth IRA = wash sale, with a devastating twist (below).
• Taxable loss + your spouse buys the same stock = wash sale. The IRS treats spouses as effectively one economic unit for this rule.
• Purchases in an entity you control (certain business accounts) can also trigger it.

Because each 1099-B is prepared in isolation, the losses look clean on paper. The IRS, however, expects you to reconcile across everything.

The IRA Trap: A Permanently Lost Deduction

This is the most punishing version of the rule. If you sell a stock at a loss in your taxable account and buy the same security in your IRA within the wash sale window, the loss is disallowed — but unlike a normal wash sale, the disallowed loss is not added to the basis of the IRA shares (per IRS guidance, Revenue Ruling 2008-5). IRAs don't track taxable basis that way.

The result: the loss is gone forever. You don't get to defer it and recover it later — it simply vanishes. This is the single most expensive cross-account mistake, and it's easy to make with automatic IRA contributions or a robo-advisor buying the same funds your taxable account just sold at a loss.

Why Your Brokers Won't Catch It

Broker wash sale reporting has a hard limitation baked in: a broker can only track purchases and sales of identical securities (same CUSIP) within the same account it holds. It cannot and does not:

• Look at your accounts at other brokers
• Look at your IRA or 401(k)
• Look at your spouse's accounts
• Judge "substantially identical" securities (e.g., two different S&P 500 ETFs, or a stock and its options) — brokers only match exact CUSIPs, but the tax rule is broader

So your 1099-Bs can each be perfectly correct within their own account and still collectively miss wash sales that the tax rule requires you to recognize. The reconciliation is a manual job.

How to Handle Cross-Account Wash Sales

1. Gather every account's 1099-B — all brokers, plus records of IRA and spouse activity for the year.
2. Line up loss sales against all purchases of the same or substantially identical securities across every account within each sale's 61-day window.
3. Identify cross-account wash sales the brokers missed — a loss in one account matched by a buy in another.
4. Report the additional disallowed losses on Form 8949 using adjustment code W and a positive column-g adjustment, exactly as you would for a within-account wash sale. For IRA-triggered wash sales, the loss is disallowed with no basis recovery — you simply lose it.
5. Watch "substantially identical" cases — if you sold one total-market ETF at a loss and bought a near-identical one, that can be a wash sale even though the CUSIPs differ and no broker flagged it.

If you sold your entire position and thought that made you safe, note that a repurchase in another account still triggers the rule — our guide on wash sales when you sold all your shares covers that specific misconception.

How to Avoid the Trap Going Forward

• Don't rebuy a tax-loss-harvested security in your IRA (or let a robo-advisor do it) within 30 days. This is the cardinal rule.
• Coordinate with your spouse so you're not buying what the other just sold at a loss.
• Use a genuinely different security when harvesting losses — different enough not to be "substantially identical" — if you want to stay in the market.
• Keep the 61-day window in mind across every account, not just the one you sold in.

FAQ

Does the wash sale rule apply across different accounts?

Yes. It applies to you as a taxpayer across all your accounts — multiple brokers, your IRA, and even your spouse's accounts. A loss in one account can be washed by a purchase in another.

What happens if I trigger a wash sale with my IRA?

The loss is disallowed and, unlike a normal wash sale, it is not added to the basis of the IRA shares. The deduction is lost permanently (per IRS Revenue Ruling 2008-5).

Do brokers report wash sales across accounts?

No. A broker only tracks identical securities within the single account it holds. Cross-broker, IRA, and spousal wash sales are invisible on the 1099-B and are your responsibility to report.

Does a wash sale apply to my spouse's trades?

Yes. The IRS treats spouses as one economic unit for the wash sale rule, so your spouse buying a security you sold at a loss can trigger disallowance.

What counts as "substantially identical"?

The same security, or one so similar it's effectively equivalent — which can include near-identical index ETFs or a stock and its in-the-money options. Brokers only match exact CUSIPs, so they miss these; you must judge them yourself.

How do I report a cross-account wash sale?

On Form 8949 with adjustment code W and a positive column-g adjustment for the disallowed loss — the same as a within-account wash sale, except an IRA-triggered loss is simply lost with no basis recovery.

Bottom Line

The wash sale rule sees you, not your accounts. A loss you carefully harvested in one brokerage can be quietly disallowed by a purchase in another broker, your IRA, or your spouse's account — and the brokers, each looking only at their own walls, will never flag it. Worst of all, an IRA repurchase destroys the loss permanently.

Reconcile your loss sales against every purchase across every account in the 61-day window, report the extra disallowed losses on Form 8949, and above all, never rebuy a tax-loss-harvested security in your IRA. The rule is broader than any single 1099-B shows.

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