About Wash-Sale Guardian

Wash-Sale Guardian is an independent, one-person project built by a multi-account retail trader — not a CPA — who got bitten by a cross-account wash sale: a loss harvested at one broker, quietly washed by a re-buy at another, discovered months later at tax time, too late to avoid it. Neither broker warned me, because neither broker could see the other. That's not a bug in the brokers; it's the structure of the system. So I built the missing piece. I publish anonymously; when the rest of this site says "we," it means me.

What this project stands for

• Your trade history shouldn't be the price of admission. The tool runs entirely in your browser. There is no server that receives your trades, no account to create, and no brokerage login to hand over. I can't see your trades because nothing on this site sends them anywhere.
• A tax tool must never guess. When your imported history doesn't reconcile, the engine is built to refuse a verdict rather than risk a wrong "you're safe." Every detection rule is documented on the methodology page, including what it doesn't handle.
• Primary sources or it didn't happen. The articles cite IRS Publication 550, IRC §1091, and Rev. Rul. 2008-5 directly. I'm a trader, not a CPA or EA, and I say so — nothing here is tax advice.

Corrections

If you find an error — in an article or in the tool's output — email hello@washsaleguardian.com. Substantive corrections are fixed promptly and noted on the page with an updated date.

Contact

hello@washsaleguardian.com — bug reports, broker CSV formats the checker doesn't parse yet (just the header row and one made-up line, please; never your real trades), partnership questions (I'm especially interested in hearing from CPAs and EAs who serve active traders).