The wash sale rule is not limited to one brokerage login. If you sell a security at a loss in a taxable account and buy a substantially identical security within the 61-day window in another place you (or, in many planning contexts, your household strategy) control—including a traditional or Roth IRA, a second broker, or sometimes a spouse’s taxable account—the IRS can still disallow the loss. Broker 1099-B wash-sale checkboxes often only see trades inside that firm.
Core window and “substantially identical” orientation: Wash sale rule basics. Harvesting playbook: Tax-loss harvesting basics. Where losses usually live: a taxable brokerage account at Fidelity, Vanguard, Schwab, or E*TRADE—not a game you play inside a 401(k) for annual Form 8949 deductions.
Cross-account patterns that still trip the rule
| Pattern | Why it matters |
|---|---|
| Sell ETF A at a loss in taxable Schwab; buy ETF A in a Vanguard IRA 10 days later | Classic IRA repurchase trap—loss may be disallowed |
| Sell stock in taxable; spouse buys same stock in their taxable account inside the window (joint planning / same return) | Household coordination risk—confirm with a tax pro for your filing status |
| Sell at Broker A; buy at Broker B the same ticker | Each 1099-B may look “clean”; Form 8949 still needs the truth |
| Sell Fund A; DRIP or automatic deposit buys Fund A in another account | Small automated buys still count |
| Sell in taxable; buy call options or the same share class that restore the position | Substantially identical can reach related contracts |
Retirement wrappers follow different annual tax timing (Taxable vs tax-advantaged accounts), but wash sales can interact across them. Many practitioners warn that an IRA repurchase can disallow the taxable loss without giving you a useful basis increase inside the IRA the way a taxable replacement sometimes does—verify with a qualified professional before you harvest near IRA buys.
What your broker can and cannot see
- Same-broker taxable: 1099-B wash-sale codes are a starting point, not gospel.
- IRA at same broker: Some systems flag related activity; many do not fully explain tax results.
- Different broker or app: Assume no automatic cross-firm wash-sale engine.
- Your job: Track loss sales and any substantially identical buys across every account you use for Filing taxes for beginners worksheets (Form 8949 / Schedule D).
Diversified long-term investing still beats clever harvest gymnastics for most households (Investing basics for beginners).
Worked example
Sam sells 200 shares of a total-market ETF in a Fidelity taxable account on November 5 for a $2,400 loss, planning a harvest. On November 18 Sam’s automatic IRA contribution at Schwab buys the same ETF (the target-date alternative was out of stock in the app, so Sam picked the familiar ticker).
Educational pattern: that IRA buy sits inside the 30-day-after window. The $2,400 taxable loss can be disallowed. Unlike buying the ETF again in taxable—where disallowed loss often adds to basis—an IRA repurchase may leave Sam with no helpful basis bump inside the IRA. Sam still holds market exposure, but the tax deduction Sam wanted for this year’s return may be gone. Cleaner path: after selling ETF A, buy a different broad U.S. fund B in taxable for 31+ days, and keep ETF A off the buy list across all IRAs and taxable logins for the full window. Pause DRIP on A everywhere.
Practical habits for multi-account households
- Before a harvest, list every account that might buy the same ticker: taxable, IRA, Roth, HSA investments, spouse accounts you coordinate.
- Turn off DRIP and auto-invest on that ticker across firms for the window.
- Prefer replacement funds with a clearly different role or index—not the same share class at a second broker.
- Keep a simple spreadsheet of loss-sale dates and tickers; do not rely on one 1099-B checkbox.
- If you already mixed an IRA buy with a taxable harvest, gather confirms and ask a tax pro how to report—do not “fix” it with another impulsive trade.
Checklist
- Treat wash sales as a household and multi-broker problem, not a single-app toggle.
- Measure 30 days before and after each loss sale.
- Avoid same-ticker buybacks in IRAs and other accounts inside the window.
- Pause DRIP/auto-buy on harvested tickers everywhere.
- Adjust Form 8949 when brokers under-report cross-account washes.
- Use carryforward worksheets only for losses that remain allowed after adjustments.
ETF-to-ETF replacement trades and substantially identical timing: Wash-sale ETF swap basics.
Educational only. Not tax, legal, or investment advice. Wash-sale details are technical and fact-specific; verify with current IRS Publication 550 and a qualified tax professional before you trade around losses.